Citation Alerts

Friday, July 17, 2009

ISI Web of Knowledge Alert - Hummer, G

ISI Web of Knowledge Citation Alert

Cited Article: Hummer, G. Water conduction through the hydrophobic channel of a carbon nanotube
Alert Expires: 22 OCT 2009
Number of Citing Articles: 4 new records this week (4 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Capillary rise of water in hydrophilic nanopores

Authors:
Gruener, S; Hofmann, T; Wallacher, D; Kityk, AV; Huber, P

Author Full Names:
Gruener, Simon; Hofmann, Tommy; Wallacher, Dirk; Kityk, Andriy V.; Huber, Patrick

Source:
PHYSICAL REVIEW E 79 (6): Art. No. 067301 Part 2 JUN 2009

Language:
English

Document Type:
Article

Author Keywords:
boundary layers; capillarity; capillary waves; flow through porous media; hydrophilicity; nanofluidics; nanoporous materials; silicon compounds; sorption; water

KeyWords Plus:
VYCOR GLASS; NEGATIVE PRESSURES; CARBON NANOTUBES; POROUS VYCOR; DYNAMICS; FLOW; NANOSCALE; LIQUIDS; NANOFLUIDICS; ADSORPTION

Abstract:
We report on the capillary rise of water in three-dimensional networks of hydrophilic silica pores with 3.5 nm and 5 nm mean radii, respectively (porous Vycor monoliths). We find classical square root of time Lucas-Washburn laws for the imbibition dynamics over the entire capillary rise times of up to 16 h investigated. Provided we assume two preadsorbed strongly bound layers of water molecules resting at the silica walls, which corresponds to a negative velocity slip length of -0.5 nm for water flow in silica nanopores, we can describe the filling process by a retained fluidity and capillarity of water in the pore center. This anticipated partitioning in two dynamic components reflects the structural-thermodynamic partitioning in strongly silica bound water layers and capillary condensed water in the pore center which is documented by sorption isotherm measurements.

Reprint Address:
Gruener, S, Univ Saarland, Fac Phys & Mechatron Engn, D-66041 Saarbrucken, Germany.

Research Institution addresses:
[Gruener, Simon; Hofmann, Tommy; Huber, Patrick] Univ Saarland, Fac Phys & Mechatron Engn, D-66041 Saarbrucken, Germany; [Wallacher, Dirk] Helmholtz Ctr Mat & Energy, D-14109 Berlin, Germany; [Kityk, Andriy V.] Czestochowa Univ Technol, Inst Comp Sci, PL-42220 Czestochowa, Poland

E-mail Address:
s.gruener@mx.uni-saarland.de; p.huber@physik.uni-saarland.de

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Cited Reference Count:
58

Times Cited:
0

Publisher:
AMER PHYSICAL SOC; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA

Subject Category:
Physics, Fluids & Plasmas; Physics, Mathematical

ISSN:
1539-3755

DOI:
10.1103/PhysRevE.79.067301

IDS Number:
466XP

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Title:
Unorthodox Uses of Bennett's Acceptance Ratio Method

Authors:
Konig, G; Bruckner, S; Boresch, S

Author Full Names:
Koenig, Gerhard; Bruckner, Stefan; Boresch, Stefan

Source:
JOURNAL OF COMPUTATIONAL CHEMISTRY 30 (11): 1712-1718 Sp. Iss. SI AUG 2009

Language:
English

Document Type:
Article

Author Keywords:
free energy stimulation; acceptance ratio method; force field; implicit solvent

KeyWords Plus:
FREE-ENERGY SIMULATIONS; HISTOGRAM ANALYSIS METHOD; SOLVATION; DYNAMICS; WATER; EQUILIBRIUM; AVERAGES; PROTEINS; SYSTEMS

Abstract:
We illustrate the application of Bennett's acceptance ratio method (BAR) to problems in which standard methods to compute free energy differences (thermodynamic integration, exponential formula) are not practical. Our starting point is the observation that BAR can often compute the free energy difference between two states without the need for intermediate states usually employed (and necessary) in alchemical free energy simulations. This is demonstrated first for the free energy difference between ethane and methanol in aqueous solution. We then show how BAR can be used to compute directly rather unusual free energy differences, such as the free energy difference resulting from changing the treatment of electrostatic interactions, from switching the force field, or from using an implicit solvent model. Calculations of this kind should prove useful for force field development and the validation of implicit solvent methods. (C) 2009 Wiley Periodicals. Inc. J Comput Chem 30: 1!
712-1718, 2009

Reprint Address:
Boresch, S, Univ Vienna, Dept Computat Biol Chem, Wahringerstr 17, A-1090 Vienna, Austria.

Research Institution addresses:
[Koenig, Gerhard; Bruckner, Stefan; Boresch, Stefan] Univ Vienna, Dept Computat Biol Chem, A-1090 Vienna, Austria

E-mail Address:
stefan@mdy.univie.ac.at

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Cited Reference Count:
36

Times Cited:
0

Publisher:
JOHN WILEY & SONS INC; 111 RIVER ST, HOBOKEN, NJ 07030 USA

Subject Category:
Chemistry, Multidisciplinary

ISSN:
0192-8651

DOI:
10.1002/jcc.21255

IDS Number:
464KS

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Title:
Transport properties and induced voltage in the structure of water-filled single-walled boron-nitrogen nanotubes

Authors:
Yuan, QZ; Zhao, YP

Author Full Names:
Yuan, Quanzi; Zhao, Ya-Pu

Source:
BIOMICROFLUIDICS 3 (2): Art. No. 022411 APR-JUN 2009

Language:
English

Document Type:
Proceedings Paper

Author Keywords:
boron compounds; density functional theory; diffusion; III-V semiconductors; molecular dynamics method; nanofluidics; pipe flow; semiconductor nanotubes; wide band gap semiconductors

KeyWords Plus:
CARBON NANOTUBES; MOLECULAR-DYNAMICS; NITRIDE NANOTUBES; CHANNEL; FLOW; LIQUIDS

Abstract:
Density functional theory/molecular dynamics simulations were employed to give insights into the mechanism of voltage generation based on a water-filled single-walled boron-nitrogen nanotube (SWBNNT). Our calculations showed that (1) the transport properties of confined water in a SWBNNT are different from those of bulk water in view of configuration, the diffusion coefficient, the dipole orientation, and the density distribution, and (2) a voltage difference of several millivolts would generate between the two ends of a SWBNNT due to interactions between the water dipole chains and charge carriers in the tube. Therefore, this structure of a water-filled SWBNNT can be a promising candidate for a synthetic nanoscale power cell as well as a practical nanopower harvesting device.

Reprint Address:
Zhao, YP, Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China.

Research Institution addresses:
[Yuan, Quanzi; Zhao, Ya-Pu] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China

E-mail Address:
yzhao@imech.ac.cn

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Cited Reference Count:
28

Times Cited:
1

Publisher:
AMER INST PHYSICS; CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA

Subject Category:
Biophysics; Nanoscience & Nanotechnology; Physics, Fluids & Plasmas

ISSN:
1932-1058

DOI:
10.1063/1.3158618

IDS Number:
465PW

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Title:
Self-Diffusion of Water and Simple Alcohols in Single-Walled Aluminosilicate Nanotubes

Authors:
Zang, J; Konduri, S; Nair, S; Sholl, DS

Author Full Names:
Zang, Ji; Konduri, Suchitra; Nair, Sankar; Sholl, David S.

Source:
ACS NANO 3 (6): 1548-1556 JUN 2009

Language:
English

Document Type:
Article

Author Keywords:
inorganic nanotubes; aluminosilicate; self-diffusion; water; methanol; ethanol

KeyWords Plus:
MIXED-OXIDE NANOTUBES; FAST MASS-TRANSPORT; CARBON NANOTUBE; IMOGOLITE NANOTUBES; CORRELATED FLIGHTS; MEMBRANES; MODELS; NANOPARTICLES; RESISTANCES; DIMENSIONS

Abstract:
Understanding transport phenomena of fluids through nanotubes (NTs) is of great interest in order to enable potential application of NTs as separation devices, encapsulation media for molecule storage and delivery, and sensors. Single-walled metal oxide NTs are interesting materials because they present a well-defined solid-state structure, precisely tunable diameter and length, as well as a hydrophilic and functionalizable interior for tuning transport and adsorption selectivity. Here, we study the transport properties of hydrogen-bonding liquids (water, methanol, and ethanol) through a single-walled aluminosilicate NT to investigate the influence of liquid-surface and liquid-liquid interactions and the effects of competitive transport of different chemical species using molecular dynamics (MD) simulations. The self-diffusivities (D-s) for all the three species decrease with increasing loading and are comparable to bulk liquid diffusivities at low molecular loadings. We sho!
w that the hydrogen-bond network associated with water makes its diffusion behavior different from methanol and ethanol. Mixtures of water and methanol show segregation in the NT, with water located closer to the tube wall and the alcohol molecules localized near the center of the NT. D, values of water in an analogous aluminogermanate NT are larger than those in the aluminosilicate NT due to a larger pore diameter.

Reprint Address:
Sholl, DS, Georgia Inst Technol, Sch Chem & Biomol Engn, 311 Ferst Dr NW, Atlanta, GA 30332 USA.

Research Institution addresses:
[Zang, Ji; Konduri, Suchitra; Nair, Sankar; Sholl, David S.] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA

E-mail Address:
david.sholl@chbe.gatech.edu

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Cited Reference Count:
37

Times Cited:
0

Publisher:
AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA

Subject Category:
Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary

ISSN:
1936-0851

DOI:
10.1021/nn9001837

IDS Number:
464UP

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ISI Web of Knowledge Alert - Ghosh, S

ISI Web of Knowledge Citation Alert

Cited Article: Ghosh, S. Carbon nanotube flow sensors
Alert Expires: 22 OCT 2009
Number of Citing Articles: 3 new records this week (3 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Renormalization of the phonon spectrum in semiconducting single-walled carbon nanotubes studied by Raman spectroscopy

Authors:
Das, A; Sood, AK

Author Full Names:
Das, Anindya; Sood, A. K.

Source:
PHYSICAL REVIEW B 79 (23): Art. No. 235429 JUN 2009

Language:
English

Document Type:
Article

KeyWords Plus:
TRANSISTOR; GRAPHENE; SCATTERING; FILMS

Abstract:
In situ Raman experiments together with transport measurements have been carried out in single-walled carbon nanotubes as a function of electrochemical top gate voltage (V-g). We have used the green laser (E-L = 2.41 eV), where the semiconducting nanotubes of diameter similar to 1.4 nm are in resonance condition. In semiconducting nanotubes, the G(-)- and G(+)-mode frequencies increase by similar to 10 cm(-1) for hole doping, the frequency shift of the G(-) mode is larger compared to the G(+) mode at the same gate voltage. However, for electron doping the shifts are much smaller: G(-) upshifts by only similar to 2 cm(-1) whereas the G(+) does not shift. The transport measurements are used to quantify the Fermi-energy shift (E-F) as a function of the gate voltage. The electron-hole asymmetry in G- and G+ modes is quantitatively explained using nonadiabatic effects together with lattice relaxation contribution. The electron-phonon coupling matrix elements of transverse-optic (!
G(-)) and longitudinal-optic (G(+)) modes explain why the G- mode is more blueshifted compared to the G(+) mode at the same V-g. The D and 2D bands have different doping dependence compared to the G(+) and G(-) bands. There is a large downshift in the frequency of the 2D band (similar to 18 cm(-1)) and D (similar to 10 cm(-1)) band for electron doping, whereas the 2D band remains constant for the hole doping but D upshifts by similar to 8 cm(-1). The doping dependence of the overtone of the G bands (2G bands) shows behavior similar to the dependence of the G+ and G(-) bands.

Reprint Address:
Das, A, Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India.

Research Institution addresses:
[Das, Anindya; Sood, A. K.] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

E-mail Address:
asood@physics.iisc.ernet.in

Cited References:
ARAUJO PT, 2007, PHYS REV LETT, V98, P4.
BIERCUK MJ, 2008, TOP APPL PHYS, V111, P455.
BURKE PJ, 2002, IEEE T NANOTECHNOL, V1, P129, DOI 10.1109/TNANO.2002.806823.
CAUDAL N, 2007, PHYS REV B, V75, ARTN 115423.
CORIO P, 2003, CHEM PHYS LETT, V370, P675, DOI 10.1016/S0009-2614(03)00157-X.
CORIO P, 2004, CHEM PHYS LETT, V392, P396, DOI 10.1016/j.cplett.2004.05.050.
DAS A, 2007, PHYS REV LETT, V99, ARTN 136803.
DAS A, 2008, NAT NANOTECHNOL, V3, P210, DOI 10.1038/nnano.2008.67.
DAS A, 2009, PHYS REV B, V79, ARTN 155417.
DERYCKE V, 2002, APPL PHYS LETT, V80, P2773.
DUBAY O, 2002, PHYS REV LETT, V88, ARTN 235506.
FARHAT H, 2007, PHYS REV LETT, V99, P1.
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GHOSH S, 2003, SCIENCE, V299, P1042, DOI 10.1126/science.1079080.
KALBAC M, 2008, NANO LETT, V8, P1257, DOI 10.1021/nl073104h.
KAVAN L, 2001, J PHYS CHEM B, V105, P10764.
KRUPKE R, 2003, SCIENCE, V301, P344, DOI 10.1126/science.1086534.
LAZZERI M, 2005, PHYS REV LETT, V95, ARTN 236802.
LAZZERI M, 2006, PHYS REV B, V73, P5426.
LAZZERI M, 2006, PHYS REV LETT, V97, ARTN 266407.
LAZZERI M, 2008, PHYS REV B, V78, P1406.
LU CG, 2004, NANO LETT, V4, P623, DOI 10.1021/nl049937e.
MALARD LM, 2008, PHYS REV LETT, V101, ARTN 257401.
MICHEL T, 2007, PHYS REV B, V75, ARTN 155432.
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PISANA S, 2007, NAT MATER, V6, P198, DOI 10.1038/nmat1846.
PISCANEC S, 2004, PHYS REV LETT, V93, P5503.
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POP E, 2005, PHYS REV LETT, V95, P5505.
RAFAILOV PM, 2004, J PHYS CHEM B, V108, P19241, DOI 10.1021/jp046803g.
REICH S, 2004, CARBON NANOTUBES BAS.
SAITO R, 1998, PHYS PROPERTIES CARB.
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TANS SJ, 1998, NATURE, V393, P49.
THOMSEN C, 2000, PHYS REV LETT, V85, P5214.
TSANG JC, 2007, NAT NANOTECHNOL, V2, P725, DOI 10.1038/nnano.2007.321.
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YAN J, 2007, PHYS REV LETT, V98, P6802.
YAN J, 2008, PHYS REV LETT, V101, ARTN 136804.

Cited Reference Count:
40

Times Cited:
0

Publisher:
AMER PHYSICAL SOC; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA

Subject Category:
Physics, Condensed Matter

ISSN:
1098-0121

DOI:
10.1103/PhysRevB.79.235429

IDS Number:
466XU

========================================================================

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Title:
Large-scale production and metrology of vertically aligned carbon nanotube films

Authors:
Dai, L; Wang, P; Bosnick, K

Author Full Names:
Dai, Lei; Wang, Peter; Bosnick, Ken

Source:
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A 27 (4): 1071-1075 JUL 2009

Language:
English

Document Type:
Proceedings Paper

Author Keywords:
carbon nanotubes; chemical vapour deposition; chromium; electron microscopy; iron; measurement standards; metallic thin films; multilayers; nanotechnology; nickel; quality control; thin films

KeyWords Plus:
CHEMICAL-VAPOR-DEPOSITION; GROWTH; SENSORS

Abstract:
The authors have produced carbon nanotube (CNT) films on a large scale in a commercial chemical vapor deposition (CVD) reactor. The reactor (built by Tystar, Inc) is the first of its kind and is capable of handling up to 50 150 mm wafers simultaneously with industry standard process control. Electron microscopy reveals that the CNT films consist of densely packed and vertically aligned multiwalled CNTs. A variety of catalysts and reaction conditions were systematically tested. Both Fe films and Cr/Ni/Fe film stacks have been found favorable for the growth of aligned CNT films. While electron microscopy provides invaluable information, it is qualitative and unsuitable for process optimization and industrial quality control. A quantitative metrology standard is required for these purposes, but has to date not been explicitly defined. They report on their initial developments toward this metrology standard, considering such factors as film thickness (or CNT length), CNT wall nu!
mber and diameter, amorphous carbon content, and uniformity. Various measurement techniques have been investigated and are discussed. The developed metrology will facilitate quality control and process optimization necessary for industry applications of CNT films.

Reprint Address:
Dai, L, Natl Res Council Canada, Appl Nanomat Technol Team, Natl Inst Nanotechnol, 11421 Saskatchewan Dr, Edmonton, AB T6G 2M9, Canada.

Research Institution addresses:
[Dai, Lei; Wang, Peter; Bosnick, Ken] Natl Res Council Canada, Appl Nanomat Technol Team, Natl Inst Nanotechnol, Edmonton, AB T6G 2M9, Canada

E-mail Address:
ken.bosnick@nrc.ca

Cited References:
BANDOW S, 1998, PHYS REV LETT, V80, P3779.
CHEN B, 2005, CARBON, V43, P3172, DOI 10.1016/j.carbon.2005.06.024.
DAI HJ, 2002, SURF SCI, V500, P218.
DILEO RA, 2007, J APPL PHYS, V101, ARTN 064307.
EBBESEN TW, 1992, NATURE, V358, P220.
GHOSH S, 2003, SCIENCE, V299, P1042, DOI 10.1126/science.1079080.
HALONEN N, 2008, J PHYS CHEM C, V112, P6723, DOI 10.1021/jp7110617.
HART AJ, 2006, CARBON, V44, P348, DOI 10.1016/j.carbon.2005.07.008.
HART AJ, 2006, J PHYS CHEM B, V110, P8250, DOI 10.1021/jp055498b.
HORIBE M, 2005, JPN J APPL PHYS 1, V44, P5309, DOI 10.1143/JJAP.44.5309.
KONG J, 1998, CHEM PHYS LETT, V292, P567.
MUKHOPADHYAY K, 1999, CHEM PHYS LETT, V303, P117.
QIN LC, 1998, APPL PHYS LETT, V72, P3437.
RAFFAELLE RP, 2005, MAT SCI ENG B-SOLID, V116, P233, DOI 10.1016/j.mseb.2004.09.034.
RINZLER AG, 1998, APPL PHYS A-MATER, V67, P29.
SCHAPER AK, 2004, J CATAL, V222, P250, DOI 10.1016/j.jcat.2003.11.011.
SNOW ES, 2003, APPL PHYS LETT, V82, P2145, DOI 10.1063/1.1564291.
STAR A, 2004, ADV MATER, V16, P2049, DOI 10.1002/adma.200400322.
TZENG Y, 2003, DIAM RELAT MATER, V12, P774.
VANDERWAL RL, 2001, CARBON, V39, P2277.
WANG BN, 2007, J PHYS CHEM C, V111, P5859, DOI 10.1021/jp068895a.
YOKOMICHI H, 2001, THIN SOLID FILMS, V395, P253.

Cited Reference Count:
22

Times Cited:
0

Publisher:
A V S AMER INST PHYSICS; STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA

Subject Category:
Materials Science, Coatings & Films; Physics, Applied

ISSN:
0734-2101

DOI:
10.1116/1.3148827

IDS Number:
465PT

========================================================================

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Title:
Transport properties and induced voltage in the structure of water-filled single-walled boron-nitrogen nanotubes

Authors:
Yuan, QZ; Zhao, YP

Author Full Names:
Yuan, Quanzi; Zhao, Ya-Pu

Source:
BIOMICROFLUIDICS 3 (2): Art. No. 022411 APR-JUN 2009

Language:
English

Document Type:
Proceedings Paper

Author Keywords:
boron compounds; density functional theory; diffusion; III-V semiconductors; molecular dynamics method; nanofluidics; pipe flow; semiconductor nanotubes; wide band gap semiconductors

KeyWords Plus:
CARBON NANOTUBES; MOLECULAR-DYNAMICS; NITRIDE NANOTUBES; CHANNEL; FLOW; LIQUIDS

Reprint Address:
Zhao, YP, Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China.

Research Institution addresses:
[Yuan, Quanzi; Zhao, Ya-Pu] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China

E-mail Address:
yzhao@imech.ac.cn

Cited Reference Count:
28

Times Cited:
1

Publisher:
AMER INST PHYSICS; CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA

Subject Category:
Biophysics; Nanoscience & Nanotechnology; Physics, Fluids & Plasmas

ISSN:
1932-1058

DOI:
10.1063/1.3158618

IDS Number:
465PW

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ISI Web of Knowledge Alert - Zhao, Y

ISI Web of Knowledge Citation Alert

Cited Article: Zhao, Y. Individual water-filled single-walled carbon nanotubes as hydroelectric power converters
Alert Expires: 22 OCT 2009
Number of Citing Articles: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Transport properties and induced voltage in the structure of water-filled single-walled boron-nitrogen nanotubes

Authors:
Yuan, QZ; Zhao, YP

Author Full Names:
Yuan, Quanzi; Zhao, Ya-Pu

Source:
BIOMICROFLUIDICS 3 (2): Art. No. 022411 APR-JUN 2009

Language:
English

Document Type:
Proceedings Paper

Author Keywords:
boron compounds; density functional theory; diffusion; III-V semiconductors; molecular dynamics method; nanofluidics; pipe flow; semiconductor nanotubes; wide band gap semiconductors

KeyWords Plus:
CARBON NANOTUBES; MOLECULAR-DYNAMICS; NITRIDE NANOTUBES; CHANNEL; FLOW; LIQUIDS

Reprint Address:
Zhao, YP, Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China.

Research Institution addresses:
[Yuan, Quanzi; Zhao, Ya-Pu] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China

E-mail Address:
yzhao@imech.ac.cn

Cited Reference Count:
28

Times Cited:
1

Publisher:
AMER INST PHYSICS; CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA

Subject Category:
Biophysics; Nanoscience & Nanotechnology; Physics, Fluids & Plasmas

ISSN:
1932-1058

DOI:
10.1063/1.3158618

IDS Number:
465PW

Please enter your account number here:

ISI Web of Knowledge Alert - Thompson, P

ISI Web of Knowledge Citation Alert

Cited Article:	Thompson, P. A general boundary condition for liquid flow at solid surfaces
Alert Expires:	21 OCT 2009
Number of Citing Articles:	1 new records this week (1 in this e-mail)
Organization ID:	3b97d1bbc1878baed0ab183d8b03130b

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Title: An atomistic-continuum hybrid simulation of fluid flows over superhydrophobic surfaces

Authors: Li, Q; He, GW

Author Full Names: Li, Qiang; He, Guo-Wei

Source: BIOMICROFLUIDICS 3 (2): Art. No. 022409 APR-JUN 2009

Language: English

Document Type: Proceedings Paper

Author Keywords: Couette flow; flow simulation; molecular dynamics method; Navier-Stokes equations

KeyWords Plus: BOUNDARY-CONDITIONS; MOLECULAR-DYNAMICS; SHEAR-FLOW; SOLID INTERFACE; SLIP LENGTH; LIQUID; MICROCHANNELS; VELOCIMETRY; ROUGHNESS; FRICTION

Abstract: Recent experiments have found that slip length could be as large as on the order of 1 mu m for fluid flows over superhydrophobic surfaces. Superhydrophobic surfaces can be achieved by patterning roughness on hydrophobic surfaces. In the present paper, an atomistic-continuum hybrid approach is developed to simulate the Couette flows over superhydrophobic surfaces, in which a molecular dynamics simulation is used in a small region near the superhydrophobic surface where the continuum assumption is not valid and the Navier-Stokes equations are used in a large region for bulk flows where the continuum assumption does hold. These two descriptions are coupled using the dynamic coupling model in the overlap region to ensure momentum continuity. The hybrid simulation predicts a superhydrophobic state with large slip lengths, which cannot be obtained by molecular dynamics simulation alone.

Reprint Address: He, GW, Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China.

Research Institution addresses: [Li, Qiang; He, Guo-Wei] Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China

E-mail Address: hgw@lnm.imech.ac.cn

Cited References: BARRAT JL, 1999, FARADAY DISCUSS, V112, P119.
BARRAT JL, 1999, PHYS REV LETT, V82, P4671.
BRENNER H, 2000, PHYS REV E B, V61, P6879.
CAO BY, 2006, PHYS REV E 2, V74, P6311.
CHOI CH, 2003, PHYS FLUIDS, V15, P2897, DOI 10.1063/1.1605425.
CHOI CH, 2006, PHYS FLUIDS, V18, P87105.
CHOI CH, 2006, PHYS REV LETT, V96, P6001.
CIEPLAK M, 2001, PHYS REV LETT, V86, P803.
CIEPLAK M, 2006, PHYS REV LETT, V96, ARTN 114502.
COTTINBIZONNE C, 2005, PHYS REV LETT, V94, P6102.
CRAIG VSJ, 2001, PHYS REV LETT, V87, ARTN 054504.
CROSS B, 2006, EUROPHYS LETT, V73, P390, DOI 10.1209/epl/i2005-10416-4.
CUI J, 2006, ACTA MECH SINICA, V22, P503, DOI 10.1007/s10409-006-0034-5.
FLEKKOY EG, 2000, EUROPHYS LETT, V52, P271.
GALEA TM, 2004, LANGMUIR, V20, P3477, DOI 10.1021/la035880k.
HADJICONSTANTINOU NG, 1997, INT J MOD PHYS C, V8, P967.
HONIG CDF, 2007, PHYS REV LETT, V98, P8305.
HUANG P, 2006, J FLUID MECH, V566, P447, DOI 10.1017/S0022112006002229.
HUANG P, 2007, PHYS FLUIDS, V19, P28104.
JABBARZADEH A, 2000, PHYS REV E, V61, P690.
JIN S, 2004, EXP FLUIDS, V37, P825, DOI 10.1007/s00348-004-0870-7.
JOSEPH P, 2006, PHYS REV LETT, V97, P6104.
LAUGA E, 2003, J FLUID MECH, V489, P55, DOI 10.1017/S0022112003004695.
LEE C, 2008, PHYS REV LETT, V101, P4501.
MAJUMDER M, 2005, NATURE, V438, P930, DOI 10.1038/438930b.
MARTELL MB, 2009, J FLUID MECH, V620, P31.
MIN TG, 2004, PHYS FLUIDS, V16, L55, DOI 10.1063/1.1755723.
MORRIS DL, 1992, PHYS REV A, V46, P5279.
NETO C, 2003, EUR PHYS J E, V12, P71.
NIE XB, 2004, J FLUID MECH, V500, P55, DOI 10.1017/S0022112003007225.
OCONNELL ST, 1995, PHYS REV E A, V52, UNSP R5792.
OU J, 2004, PHYS FLUIDS, V16, P4635, DOI 10.1063/1.1812011.
OU J, 2005, PHYS FLUIDS, V17, P3606.
PIT R, 1999, TRIBOL LETT, V7, P147.
PRIEZJEV NV, 2005, PHYS REV E 1, V71, P1608.
REN WQ, 2007, J COMPUT PHYS, V227, P1353, DOI 10.1016/j.jcp.2007.09.007.
SCHMATKO T, 2005, PHYS REV LETT, V94, P4501.
THOMPSON PA, 1990, PHYS REV A, V41, P6830.
THOMPSON PA, 1997, NATURE, V389, P360.
TRUESDELL R, 2006, PHYS REV LETT, V97, P4504.
VINOGRADOVA OI, 1995, LANGMUIR, V11, P2213.
WALTHER JH, 2004, PHYS REV E 1, V69, P2201.
WANG YC, 2007, CHEM ENG SCI, V62, P3574.
YOU D, 2007, PHYS FLUIDS, V19, P81701.
ZHU YX, 2001, PHYS REV LETT, V87, ARTN 096105.

Cited Reference Count: 45

Times Cited: 1

Publisher: AMER INST PHYSICS; CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA

Subject Category: Biophysics; Nanoscience & Nanotechnology; Physics, Fluids & Plasmas

ISSN: 1932-1058

DOI: 10.1063/1.3137674

IDS Number: 465PW

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ISI Web of Knowledge Alert - Majumder M

ISI Web of Knowledge Citation Alert

Cited Article: Majumder M. Nanoscale hydrodynamics - Enhanced flow in carbon nanotubes
Alert Expires: 18 OCT 2009
Number of Citing Articles: 4 new records this week (4 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Capillary rise of water in hydrophilic nanopores

Authors:
Gruener, S; Hofmann, T; Wallacher, D; Kityk, AV; Huber, P

Author Full Names:
Gruener, Simon; Hofmann, Tommy; Wallacher, Dirk; Kityk, Andriy V.; Huber, Patrick

Source:
PHYSICAL REVIEW E 79 (6): Art. No. 067301 Part 2 JUN 2009

Language:
English

Document Type:
Article

Author Keywords:
boundary layers; capillarity; capillary waves; flow through porous media; hydrophilicity; nanofluidics; nanoporous materials; silicon compounds; sorption; water

KeyWords Plus:
VYCOR GLASS; NEGATIVE PRESSURES; CARBON NANOTUBES; POROUS VYCOR; DYNAMICS; FLOW; NANOSCALE; LIQUIDS; NANOFLUIDICS; ADSORPTION

Reprint Address:
Gruener, S, Univ Saarland, Fac Phys & Mechatron Engn, D-66041 Saarbrucken, Germany.

E-mail Address:
s.gruener@mx.uni-saarland.de; p.huber@physik.uni-saarland.de

Cited Reference Count:
58

Times Cited:
0

Publisher:
AMER PHYSICAL SOC; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA

Subject Category:
Physics, Fluids & Plasmas; Physics, Mathematical

ISSN:
1539-3755

DOI:
10.1103/PhysRevE.79.067301

IDS Number:
466XP

========================================================================

Title:
Transport properties and induced voltage in the structure of water-filled single-walled boron-nitrogen nanotubes

Authors:
Yuan, QZ; Zhao, YP

Author Full Names:
Yuan, Quanzi; Zhao, Ya-Pu

Source:
BIOMICROFLUIDICS 3 (2): Art. No. 022411 APR-JUN 2009

Language:
English

Document Type:
Proceedings Paper

Author Keywords:
boron compounds; density functional theory; diffusion; III-V semiconductors; molecular dynamics method; nanofluidics; pipe flow; semiconductor nanotubes; wide band gap semiconductors

KeyWords Plus:
CARBON NANOTUBES; MOLECULAR-DYNAMICS; NITRIDE NANOTUBES; CHANNEL; FLOW; LIQUIDS

Reprint Address:
Zhao, YP, Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China.

Research Institution addresses:
[Yuan, Quanzi; Zhao, Ya-Pu] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China

E-mail Address:
yzhao@imech.ac.cn

Cited Reference Count:
28

Times Cited:
1

Publisher:
AMER INST PHYSICS; CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA

Subject Category:
Biophysics; Nanoscience & Nanotechnology; Physics, Fluids & Plasmas

ISSN:
1932-1058

DOI:
10.1063/1.3158618

IDS Number:
465PW

========================================================================

Title:
Condensation process of alcohol molecules on mesoporous silica MCM-41 and SBA-15 and fumed silica: a spin-probe ESR study

Authors:
Okazaki, M; Seelan, S; Toriyama, K

Author Full Names:
Okazaki, M.; Seelan, S.; Toriyama, K.

Source:
APPLIED MAGNETIC RESONANCE 35 (3): 363-378 APR 2009

Language:
English

Document Type:
Proceedings Paper

KeyWords Plus:
LIQUID-PHASE PHOTOREACTION; CARBON NANOTUBES; DIFFUSION; FLOW; NANOCHANNEL; MECHANISM; DYNAMICS; NMR

Abstract:
A few alcoholic solutions of di-tert-butyl nitroxide (DTBN), a spin probe, at a high concentration were condensed on several silica materials, such as MCM-41, two types of SBA-15, and fumed silica, at various amounts in vacuum. At a very low solution dose the electron spin resonance (ESR) spectrum is that of an immobilized nitroxide radical. With increasing solution dose, the spectrum is gradually sharpened and a well-separated three-line spectrum is observed at the dose that is estimated to fill the surface with a monomolecular layer. Thus, the DTBN molecule can make rapid tumbling motion on this solvent layer. With a further increase in the solution dose the ESR spectrum is modified in different ways from system to system: the line width increases approximately linearly with respect to the solution dose for the SBA-15 and fumed silica systems, but it remains almost constant for the MCM-41 system until the solution dose exceeds the total volume of a nanochannel. The line wi!
dth increase with respect to the solution dose is small for the SBA-15 system but large for the fumed silica system. These results have been interpreted geometrically with the structures of these silica materials and a condensation model for the alcohols on these surfaces. In relation to the present results, a model of the collective molecular flow of the alcohol solutions through the nanochannel of MCM-41 is given.

Reprint Address:
Okazaki, M, Natl Inst Adv Ind Sci & Technol, Res Inst Instrumentat Frontier, Moriyama Ku, 2266-98 Shimoshidami, Nagoya, Aichi 4638560, Japan.

Research Institution addresses:
[Okazaki, M.] Natl Inst Adv Ind Sci & Technol, Res Inst Instrumentat Frontier, Moriyama Ku, Nagoya, Aichi 4638560, Japan

E-mail Address:
masa-okazaki@aist.go.jp

Cited References:
ANANDAN S, 2005, MICROPOR MESOPOR MAT, V87, P77, DOI 10.1016/j.micromeso.2005.07.036.
BERLINER LJ, 1976, SPIN LABELING.
BERNER B, 1979, J PHYS CHEM-US, V83, P1406.
BURKETT SL, 1996, CHEM COMMUN 0607, P1367.
COMA A, 1997, CHEM REV, V97, P2373.
FULVIO PF, 2005, J MATER CHEM, V15, P5049, DOI 10.1039/b511346f.
HOLT JK, 2006, SCIENCE, V312, P1034, DOI 10.1126/science.1126298.
KONISHI Y, 2001, J PHYS CHEM B, V105, P9101.
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Cited Reference Count:
26

Times Cited:
0

Publisher:
SPRINGER WIEN; SACHSENPLATZ 4-6, PO BOX 89, A-1201 WIEN, AUSTRIA

Subject Category:
Physics, Atomic, Molecular & Chemical; Spectroscopy

ISSN:
0937-9347

DOI:
10.1007/s00723-009-0168-2

IDS Number:
466NM

========================================================================

Title:
Self-Diffusion of Water and Simple Alcohols in Single-Walled Aluminosilicate Nanotubes

Authors:
Zang, J; Konduri, S; Nair, S; Sholl, DS

Author Full Names:
Zang, Ji; Konduri, Suchitra; Nair, Sankar; Sholl, David S.

Source:
ACS NANO 3 (6): 1548-1556 JUN 2009

Language:
English

Document Type:
Article

Author Keywords:
inorganic nanotubes; aluminosilicate; self-diffusion; water; methanol; ethanol

KeyWords Plus:
MIXED-OXIDE NANOTUBES; FAST MASS-TRANSPORT; CARBON NANOTUBE; IMOGOLITE NANOTUBES; CORRELATED FLIGHTS; MEMBRANES; MODELS; NANOPARTICLES; RESISTANCES; DIMENSIONS

Reprint Address:
Sholl, DS, Georgia Inst Technol, Sch Chem & Biomol Engn, 311 Ferst Dr NW, Atlanta, GA 30332 USA.

Research Institution addresses:
[Zang, Ji; Konduri, Suchitra; Nair, Sankar; Sholl, David S.] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA

E-mail Address:
david.sholl@chbe.gatech.edu

Cited Reference Count:
37

Times Cited:
0

Publisher:
AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA

Subject Category:
Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary

ISSN:
1936-0851

DOI:
10.1021/nn9001837

IDS Number:
464UP

Please enter your account number here:

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Cited Article: Holt JK. Fast mass transport through sub-2-nanometer carbon nanotubes
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PT J
*Record 1 of 4.
L5 <http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;UT=000267698900086>
*Order Full Text [ ]
AU Gruener, S
Hofmann, T
Wallacher, D
Kityk, AV
Huber, P
AF Gruener, Simon
Hofmann, Tommy
Wallacher, Dirk
Kityk, Andriy V.
Huber, Patrick
TI Capillary rise of water in hydrophilic nanopores
SO PHYSICAL REVIEW E
LA English
DT Article
DE boundary layers; capillarity; capillary waves; flow through porous
media; hydrophilicity; nanofluidics; nanoporous materials; silicon
compounds; sorption; water
ID VYCOR GLASS; NEGATIVE PRESSURES; CARBON NANOTUBES; POROUS VYCOR;
DYNAMICS; FLOW; NANOSCALE; LIQUIDS; NANOFLUIDICS; ADSORPTION
AB We report on the capillary rise of water in three-dimensional networks
of hydrophilic silica pores with 3.5 nm and 5 nm mean radii,
respectively (porous Vycor monoliths). We find classical square root of
time Lucas-Washburn laws for the imbibition dynamics over the entire
capillary rise times of up to 16 h investigated. Provided we assume two
preadsorbed strongly bound layers of water molecules resting at the
silica walls, which corresponds to a negative velocity slip length of
-0.5 nm for water flow in silica nanopores, we can describe the filling
process by a retained fluidity and capillarity of water in the pore
center. This anticipated partitioning in two dynamic components
reflects the structural-thermodynamic partitioning in strongly silica
bound water layers and capillary condensed water in the pore center
which is documented by sorption isotherm measurements.
C1 [Gruener, Simon; Hofmann, Tommy; Huber, Patrick] Univ Saarland, Fac Phys & Mechatron Engn, D-66041 Saarbrucken, Germany.
[Wallacher, Dirk] Helmholtz Ctr Mat & Energy, D-14109 Berlin, Germany.
[Kityk, Andriy V.] Czestochowa Univ Technol, Inst Comp Sci, PL-42220 Czestochowa, Poland.
RP Gruener, S, Univ Saarland, Fac Phys & Mechatron Engn, D-66041
Saarbrucken, Germany.
EM s.gruener@mx.uni-saarland.de
p.huber@physik.uni-saarland.de
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NR 58
TC 0
PU AMER PHYSICAL SOC; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
DI 10.1103/PhysRevE.79.067301
PD JUN
VL 79
IS 6
PN Part 2
AR 067301
SC Physics, Fluids & Plasmas; Physics, Mathematical
GA 466XP
UT ISI:000267698900086
ER

PT J
*Record 2 of 4.
L5 <http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;UT=000267668900002>
*Order Full Text [ ]
AU Okazaki, M
Seelan, S
Toriyama, K
AF Okazaki, M.
Seelan, S.
Toriyama, K.
TI Condensation process of alcohol molecules on mesoporous silica MCM-41
and SBA-15 and fumed silica: a spin-probe ESR study
SO APPLIED MAGNETIC RESONANCE
LA English
DT Proceedings Paper
ID LIQUID-PHASE PHOTOREACTION; CARBON NANOTUBES; DIFFUSION; FLOW;
NANOCHANNEL; MECHANISM; DYNAMICS; NMR
AB A few alcoholic solutions of di-tert-butyl nitroxide (DTBN), a spin
probe, at a high concentration were condensed on several silica
materials, such as MCM-41, two types of SBA-15, and fumed silica, at
various amounts in vacuum. At a very low solution dose the electron
spin resonance (ESR) spectrum is that of an immobilized nitroxide
radical. With increasing solution dose, the spectrum is gradually
sharpened and a well-separated three-line spectrum is observed at the
dose that is estimated to fill the surface with a monomolecular layer.
Thus, the DTBN molecule can make rapid tumbling motion on this solvent
layer. With a further increase in the solution dose the ESR spectrum is
modified in different ways from system to system: the line width
increases approximately linearly with respect to the solution dose for
the SBA-15 and fumed silica systems, but it remains almost constant for
the MCM-41 system until the solution dose exceeds the total volume of a
nanochannel. The line width increase with respect to the solution dose
is small for the SBA-15 system but large for the fumed silica system.
These results have been interpreted geometrically with the structures
of these silica materials and a condensation model for the alcohols on
these surfaces. In relation to the present results, a model of the
collective molecular flow of the alcohol solutions through the
nanochannel of MCM-41 is given.
C1 [Okazaki, M.] Natl Inst Adv Ind Sci & Technol, Res Inst Instrumentat Frontier, Moriyama Ku, Nagoya, Aichi 4638560, Japan.
RP Okazaki, M, Natl Inst Adv Ind Sci & Technol, Res Inst Instrumentat
Frontier, Moriyama Ku, 2266-98 Shimoshidami, Nagoya, Aichi 4638560,
Japan.
EM masa-okazaki@aist.go.jp
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10.1016/j.micromeso.2005.07.036
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KONISHI Y, 2001, J PHYS CHEM B, V105, P9101
KRESGE CT, 1992, NATURE, V359, P710
LIKHTENSHTEIN GI, 1976, SPIN LABELLING METHO
MAJUMDER M, 2005, NATURE, V438, P44, DOI 10.1038/43844a
MORISHIGE K, 1997, J CHEM PHYS, V107, P6965
OKAZAKI M, 2000, CHEM PHYS LETT, V328, P251
OKAZAKI M, 2002, PHYS CHEM CHEM PHYS, V4, P1201
OKAZAKI M, 2003, APPL MAGN RESON, V23, P435
OKAZAKI M, 2003, J PHYS CHEM B, V107, P7654, DOI 10.1021/jp0345351
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SCHNEIDER DJ, 1989, SPIN LABELING THEORY, V8, P1
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TAUER KJ, 1952, ACTA CRYSTALLOGR, V5, P606
YANAGISAWA T, 1990, B CHEM SOC JPN, V63, P988
ZHAO XS, 1996, IND ENG CHEM RES, V35, P2075
ZHAO XS, 1997, J PHYS CHEM B, V101, P6525
NR 26
TC 0
PU SPRINGER WIEN; SACHSENPLATZ 4-6, PO BOX 89, A-1201 WIEN, AUSTRIA
SN 0937-9347
DI 10.1007/s00723-009-0168-2
PD APR
VL 35
IS 3
BP 363
EP 378
SC Physics, Atomic, Molecular & Chemical; Spectroscopy
GA 466NM
UT ISI:000267668900002
ER

PT J
*Record 3 of 4.
L5 <http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;UT=000267533600032>
*Order Full Text [ ]
AU Zang, J
Konduri, S
Nair, S
Sholl, DS
AF Zang, Ji
Konduri, Suchitra
Nair, Sankar
Sholl, David S.
TI Self-Diffusion of Water and Simple Alcohols in Single-Walled
Aluminosilicate Nanotubes
SO ACS NANO
LA English
DT Article
DE inorganic nanotubes; aluminosilicate; self-diffusion; water; methanol;
ethanol
ID MIXED-OXIDE NANOTUBES; FAST MASS-TRANSPORT; CARBON NANOTUBE; IMOGOLITE
NANOTUBES; CORRELATED FLIGHTS; MEMBRANES; MODELS; NANOPARTICLES;
RESISTANCES; DIMENSIONS
AB Understanding transport phenomena of fluids through nanotubes (NTs) is
of great interest in order to enable potential application of NTs as
separation devices, encapsulation media for molecule storage and
delivery, and sensors. Single-walled metal oxide NTs are interesting
materials because they present a well-defined solid-state structure,
precisely tunable diameter and length, as well as a hydrophilic and
functionalizable interior for tuning transport and adsorption
selectivity. Here, we study the transport properties of
hydrogen-bonding liquids (water, methanol, and ethanol) through a
single-walled aluminosilicate NT to investigate the influence of
liquid-surface and liquid-liquid interactions and the effects of
competitive transport of different chemical species using molecular
dynamics (MD) simulations. The self-diffusivities (D-s) for all the
three species decrease with increasing loading and are comparable to
bulk liquid diffusivities at low molecular loadings. We show that the
hydrogen-bond network associated with water makes its diffusion
behavior different from methanol and ethanol. Mixtures of water and
methanol show segregation in the NT, with water located closer to the
tube wall and the alcohol molecules localized near the center of the
NT. D, values of water in an analogous aluminogermanate NT are larger
than those in the aluminosilicate NT due to a larger pore diameter.
C1 [Zang, Ji; Konduri, Suchitra; Nair, Sankar; Sholl, David S.] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA.
RP Sholl, DS, Georgia Inst Technol, Sch Chem & Biomol Engn, 311 Ferst Dr
NW, Atlanta, GA 30332 USA.
EM david.sholl@chbe.gatech.edu
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NR 37
TC 0
PU AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
DI 10.1021/nn9001837
PD JUN
VL 3
IS 6
BP 1548
EP 1556
SC Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials
Science, Multidisciplinary
GA 464UP
UT ISI:000267533600032
ER

PT J
*Record 4 of 4.
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*Order Full Text [ ]
AU Nuxoll, EE
Hillmyer, MA
Wang, RF
Leighton, C
Siegel, RA
AF Nuxoll, Eric E.
Hillmyer, Marc A.
Wang, Ruifang
Leighton, C.
Siegel, Ronald A.
TI Composite Block Polymer-Microfabricated Silicon Nanoporous Membrane
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE microelectromechanical system; nanoporous; membrane; block polymer;
size selectivity
ID POLYLACTIDE DIBLOCK COPOLYMERS; THIN-FILMS; FILTRATION MEMBRANES;
TRIBLOCK COPOLYMERS; TRANSPORT; POLYSTYRENE; ARRAYS
AB Block polymers offer an attractive route to densely packed,
monodisperse nanoscale pores. However, their fragility as thin films
complicates their use as membranes. By integrating a block polymer film
with a thin (100 mu m) silicon substrate, we have developed a composite
membrane providing both nanoscale size exclusion and fast transport of
small molecules. Here we describe the fabrication of this membrane,
evaluate its mechanical integrity, and demonstrate its transport
properties for model solutes of large and small molecular weight. The
ability to block large molecules without hindering smaller ones,
coupled with the potential for surface modification of the polymer and
the microelectromechanical system style of support, makes this
composite membrane an attractive candidate for interfacing implantable
sensing and drug-delivery devices with biological hosts.
C1 [Nuxoll, Eric E.; Siegel, Ronald A.] Univ Minnesota, Dept Pharmaceut, Minneapolis, MN 55455 USA.
[Hillmyer, Marc A.] Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA.
[Wang, Ruifang; Leighton, C.] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA.
[Siegel, Ronald A.] Univ Minnesota, Dept Biomed Engn, Minneapolis, MN 55455 USA.
RP Siegel, RA, Univ Minnesota, Dept Pharmaceut, 9-177 Weaver Densford
Hall,308 Harvard St SE, Minneapolis, MN 55455 USA.
EM siege017@umn.edu
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STRIEMER CC, 2007, NATURE, V445, P749, DOI 10.1038/nature05532
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NR 38
TC 0
PU AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
DI 10.1021/am900013v
PD APR
VL 1
IS 4
BP 888
EP 893
GA 464VM
UT ISI:000267536100021
ER

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Friday, July 10, 2009

ISI Web of Knowledge Alert - Ghosh, S

ISI Web of Knowledge Citation Alert

Cited Article: Ghosh, S. Carbon nanotube flow sensors
Alert Expires: 22 OCT 2009
Number of Citing Articles: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Movement-induced voltage properties of stable graphite nanoplatelet suspensions

Authors:
Wei, T; Fan, ZJ; Zheng, C; Yao, CZ; Li, WF

Author Full Names:
Wei, Tong; Fan, Zhuangjun; Zheng, Chao; Yao, Chengzhao; Li, Weifang

Source:
MATERIALS LETTERS 63 (18-19): 1608-1610 JUL 31 2009

Language:
English

Document Type:
Article

Author Keywords:
Graphite nanoplatelet suspension; Nanomaterials; Electrical properties; Voltage generation

Abstract:
Stable and uniform dispersion of graphite nanoplatelets (GNPs, the diameter of 5-10 mu m) in organic solvent had been prepared. The dispersion of GNPs is improved remarkably with the assistance of dispersant and resin. The voltage generation for the movement of graphite nanoplatelets is observed in organic liquid. An induced voltage of similar to 90 mV has been generated, which is roughly three times higher than the voltage generation reported with multi-walled carbon nanotubes. The voltage generation increases linearly with increase of area and decrease of distance between two electrodes. Voltage generation mechanism may come from electrostatic interactions of the fluid species with the delocalized Pi electrons of the graphite from thermal excitation with the hot phonons produced by the friction of the moving liquid. Our work highlights the device potential for graphite nanoplatelets as sensitive flow sensors and for energy conversion. (C) 2009 Elsevier B.V. All rights rese!
rved.

Reprint Address:
Fan, ZJ, Harbin Engn Univ, Key Lab Superlight Mat & Surface Technol, Minist Educ, Sch Chem Engn & Mat Sci, Harbin 150001, Heilongjiang, Peoples R China.

Research Institution addresses:
[Wei, Tong; Fan, Zhuangjun; Zheng, Chao] Harbin Engn Univ, Key Lab Superlight Mat & Surface Technol, Minist Educ, Sch Chem Engn & Mat Sci, Harbin 150001, Heilongjiang, Peoples R China; [Yao, Chengzhao; Li, Weifang] Aerosp Res Inst Mat & Proc Technol, Natl Key Lab Adv Funct Composites Mat, Beijing 100076, Peoples R China

E-mail Address:
fanzhj666@163.com

Cited References:
CHEN GH, 2001, POLYM ENG SCI, V41, P2148.
GHOSH S, 2003, SCIENCE, V299, P1042, DOI 10.1126/science.1079080.
KING JA, 1999, POLYM COMPOSITE, V20, P643.
LI J, 2007, COMPOS SCI TECHNOL, V67, P2114, DOI 10.1016/j.compscitech.2006.11.010.
LIU JW, 2007, J APPL PHYS, V101, UNSP 064312-1.
NOVOSELOV KS, 2004, SCIENCE, V306, P666.
STANKOVICH S, 2006, SCIENCE, V422, P282.

Cited Reference Count:
7

Times Cited:
0

Publisher:
ELSEVIER SCIENCE BV; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS

Subject Category:
Materials Science, Multidisciplinary; Physics, Applied

ISSN:
0167-577X

DOI:
10.1016/j.matlet.2009.04.028

IDS Number:
461NE

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Citation Alerts

Friday, July 17, 2009

ISI Web of Knowledge Alert - Hummer, G

ISI Web of Knowledge Alert - Ghosh, S

ISI Web of Knowledge Alert - Zhao, Y

ISI Web of Knowledge Alert - Thompson, P

ISI Web of Knowledge Alert - Majumder M

ISI Web of Knowledge Alert - Holt JK

Friday, July 10, 2009

ISI Web of Knowledge Alert - Ghosh, S

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