Citation Alerts

Friday, October 15, 2010

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: 09 NOV 2010
Number of Citing Articles: 2 new records this week (2 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Anomalous flow behavior in closed and open thin walled nanochannels

Authors:
Murad, S; Puri, IK

Author Full Names:
Murad, Sohail; Puri, Ishwar K.

Source:
PHYSICS LETTERS A 374 (41): 4242-4246 SEP 13 2010

Language:
English

Document Type:
Article

KeyWords Plus:
WATER; MEMBRANES; SIMULATION; TRANSPORT

Abstract:
Molecular dynamics simulations have been carried out to examine water flow in symmetric and asymmetric open and closed ends nanochannels with hydrophilic surfaces. The results are counterintuitive and the opposite of what is observed in macro-systems-closed channels fill faster with fluid than do their open counterparts. In addition, hybrid closed-open asymmetric channels fill up even faster. These results can be explained on the basis of the fluid-structure interaction that arises through the different vibrational behaviors of the surface molecules that are part of the wall forming these channels. Such effects are not expected to be of significance in macro-channels, and point to an important case where macro and nanochannels exhibit contrary behavior. Since these effects results from strong interactions between the fluid molecules and solid surface, one would not expect them with hydrophobic walls, and our simulations confirm such behavior. (C) 2010 Elsevier B.V. All rights
reserved.

Reprint Address:
Murad, S, Univ Illinois, Dept Chem Engn, Chicago, IL 60607 USA.

Research Institution addresses:
[Murad, Sohail] Univ Illinois, Dept Chem Engn, Chicago, IL 60607 USA; [Puri, Ishwar K.] Virginia Polytech Inst & State Univ, Dept Engn Sci & Mech, Blacksburg, VA 24061 USA

E-mail Address:
murad@uic.edu

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Cited Reference Count:
26

Times Cited:
0

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

Subject Category:
Physics, Multidisciplinary

ISSN:
0375-9601

DOI:
10.1016/j.physleta.2010.08.043

IDS Number:
654GS

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Title:
Synthetic Chloride-Selective Carbon Nanotubes Examined by Using Molecular and Stochastic Dynamics

Authors:
Hilder, TA; Gordon, D; Chung, SH

Author Full Names:
Hilder, Tamsyn A.; Gordon, Dan; Chung, Shin-Ho

Source:
BIOPHYSICAL JOURNAL 99 (6): 1734-1742 SEP 22 2010

Language:
English

Document Type:
Article

KeyWords Plus:
BORON-NITRIDE NANOTUBES; BROWNIAN DYNAMICS; WATER TRANSPORT; FORCE-FIELDS; CHANNELS; SIMULATIONS; PERMEATION; CHEMISTRY; MEMBRANE; SEPARATION

Abstract:
Synthetic channels, such as nanotubes, offer the possibility of ion-selective nanoscale pores which can broadly mimic the functions of various biological ion channels, and may one day be used as antimicrobial agents, or for treatment of cystic fibrosis. We have designed a carbon nanotube that is selectively permeable to anions. The virtual nanotubes are constructed from a hexagonal array of carbon atoms (graphene) rolled up to form a tubular structure, with an effective radius of 4.53 angstrom and length of 34 angstrom. The pore ends are terminated with polar carbonyl groups. The nanotube thus formed is embedded in a lipid bilayer and a reservoir containing ionic solutions is added at each end of the pore. The conductance properties of these synthetic channels are then examined with molecular and stochastic dynamics simulations. Profiles of the potential of mean force at 0 mM reveal that a cation moving across the pore encounters an insurmountable free energy barrier of simil
ar to 25 kT in height. In contrast, for anions, there are two energy wells of similar to 12 kT near each end of the tube, separated by a central free energy barrier of 4 kT. The conductance of the pore, with symmetrical 500 mM solutions in the reservoirs, is 72 pS at 100 mV. The current saturates with an increasing ionic concentration, obeying a Michaelis-Menten relationship. The pore is normally occupied by two ions, and the rate-limiting step in conduction is the time taken for the resident ion near the exit gate to move out of the energy well.

Reprint Address:
Hilder, TA, Australian Natl Univ, Res Sch Biol, Canberra, ACT, Australia.

Research Institution addresses:
[Hilder, Tamsyn A.; Gordon, Dan; Chung, Shin-Ho] Australian Natl Univ, Res Sch Biol, Canberra, ACT, Australia

E-mail Address:
tamsyn.hilder@anu.edu.au

Cited References:
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Cited Reference Count:
58

Times Cited:
0

Publisher:
CELL PRESS; 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA

Subject Category:
Biophysics

ISSN:
0006-3495

DOI:
10.1016/j.bpj.2010.06.034

IDS Number:
654UY

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ISI Web of Knowledge Alert - Sokhan VP

ISI Web of Knowledge Citation Alert

Cited Article: Sokhan VP. Fluid flow in nanopores: Accurate boundary conditions for carbon nanotubes
Alert Expires: 09 NOV 2010
Number of Citing Articles: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Microfluidic Transport and Micro-scale Flow Physics: An Overview

Authors:
Chakraborty, D; Chakraborty, S

Author Full Names:
Chakraborty, Debapriya; Chakraborty, Suman

Source:
MICROFLUIDICS AND MICROFABRICATION : 1-85 2010

Language:
English

Document Type:
Proceedings Paper

Author Keywords:
Interfacial slip; slip length; Kundsen number; Reynolds number; capillary number; Bond number; continuum hypothesis; hydrophobic; interaction; nanobubble; friction factor; continuity equation; momentum; equation; Stokes hypothesis Navier Stokes equation; laminar flow; fully; developed flow; surface tension driven flow; contact angle; Young Laplace; equation; capillary filling; Marangoni effect; electrocapillary; continuous; electrowetting electrowetting on dielectric (EWOD); Young Lippman equation; optofluidics; rotational microfluidics (lab on a CD); electrokinetics; electrical; double layer (EDL); electroosmosis; streaming current; streaming potential; Poisson equation Poisson Boltzmann equation; steric effect; AC electroosmosis; electrophoresis; dielectrophoresis; electrothermal effect; electro-magnetohydrodynamics (EMHD); acoustic streaming; droplet based microfluidics

KeyWords Plus:
ELECTRIC DOUBLE-LAYER; HEAT-TRANSFER; LIQUID FLOW; ELECTROLYTE-SOLUTION; DRIVEN FLOW; FLUID-FLOW; MICROCHANNELS; WATER; DROPLET; WALL

Abstract:
In this article, we delineate some of the distinctive and demarcating fundamental aspects of microscale fluid flows as compared to their macroscale counterparts, and illustrate the utilization of these principles towards exploiting new functionalities in devices and systems of emerging importance. In particular, we emphasize on some of the important flow actuation mechanisms (pressure-driven, surface tension-driven, centrifugal, electrokinetic, magnetohydrodynamic, optical, and acoustic) in microfluidics and their implications, and outline the fundamental physical and mathematical principles that govern their implementations in practice.

Reprint Address:
Chakraborty, S, Indian Inst Technol, Dept Mech Engn, Kharagpur 721302, W Bengal, India.

Research Institution addresses:
[Chakraborty, Debapriya; Chakraborty, Suman] Indian Inst Technol, Dept Mech Engn, Kharagpur 721302, W Bengal, India

E-mail Address:
debapriya.chakraborty@gmail.com; suman@mech.iitkgp.ernet.in

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Cited Reference Count:
85

Times Cited:
0

Publisher:
SPRINGER; 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES

DOI:
10.1007/978-1-4419-1543-6_1

IDS Number:
BRA46

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ISI Web of Knowledge Alert - Holt JK

ISI Web of Knowledge Citation Alert

Cited Article: Holt JK. Fast mass transport through sub-2-nanometer carbon nanotubes
Alert Expires: 09 NOV 2010
Number of Citing Articles: 3 new records this week (3 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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PT J
*Record 1 of 3.
L5 <http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;UT=000282219600005>
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AU Kong, CL
Shintani, T
Tsuru, T
AF Kong, Chunlong
Shintani, Takuji
Tsuru, Toshinori
TI "Pre-seeding"-assisted synthesis of a high performance
polyamide-zeolite nanocomposite membrane for water purification
SO NEW JOURNAL OF CHEMISTRY
LA English
DT Article
ID REVERSE-OSMOSIS MEMBRANES; NANOFILTRATION MEMBRANES; GAS SEPARATION;
CARBON NANOTUBES; FILM; ELECTROLYTES; TRANSPORT; MODEL
AB A new type of zeolite-incorporated thin polyamide nanocomposite
membrane that exhibits high water flux with high solute rejection can
be synthesized by "pre-seeding" modified zeolite particles on a
polysulfone ultrafiltration support surface prior to interfacial
polymerization.
C1 [Kong, Chunlong; Tsuru, Toshinori] Hiroshima Univ, Dept Chem Engn, Higashihiroshima 7398527, Japan.
[Shintani, Takuji] Nitto Denko Corp, Ibaraki Osaka 5678860, Japan.
RP Tsuru, T, Hiroshima Univ, Dept Chem Engn, Higashihiroshima 7398527,
Japan.
EM tsuru@hiroshima-u.ac.jp
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NR 26
TC 0
PU ROYAL SOC CHEMISTRY; THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD,
CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1144-0546
DI 10.1039/c0nj00581a
VL 34
IS 10
BP 2101
EP 2104
SC Chemistry, Multidisciplinary
GA 655CG
UT ISI:000282219600005
ER

PT J
*Record 2 of 3.
L5 <http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;UT=000282385300013>
*Order Full Text [ ]
AU Zhu, YD
Guo, XJ
Shao, Q
Wei, MJ
Wu, XM
Lu, LH
Lu, XH
AF Zhu, Yudan
Guo, Xiaojing
Shao, Qing
Wei, Mingjie
Wu, Ximing
Lu, Linghong
Lu, Xiaohua
TI Molecular simulation study of the effect of inner wall modified groups
on ionic hydration confined in carbon nanotube
SO FLUID PHASE EQUILIBRIA
LA English
DT Proceedings Paper
DE Carbon nanotube; Ionic hydration; Molecular dynamics; Modified group
ID POTASSIUM CHANNEL; STATIC PROPERTIES; WATER; SELECTIVITY; DYNAMICS;
NANOPORES; K+; HELICITY; KCSA; NA+
AB The behaviors of the ionic hydration in nanopore are of both biological
and chemical interests. Using carbon nanotube (CNT) as the 1-D nanopore
model, we investigated the effect of the modified groups (CO) anchoring
on the pore inner wall on the hydration of Li+, Na+ and K+ with
molecular dynamics simulation. The structures of the water molecules
around the cations confined in the modified CNTs were compared with
their counterparts in the pristine CNTs. Among the three cations, the
sequence of the sensitivity for the spatial and orientation
distributions of the water molecules in the first coordination shells
is: K+>Na+>Li+. The same modification results in the opposite effects
for the ionic hydration inside the (10, 10) and (8, 8) CNTs. Inside the
(10, 10) CNT, the modification enhances the ionic hydration, whereas
inside the (8, 8) CNT, the ionic hydration is weakened by the
modification of CNT wall. (C) 2010 Elsevier B.V. All rights reserved.
C1 [Zhu, Yudan; Guo, Xiaojing; Shao, Qing; Wei, Mingjie; Wu, Ximing; Lu, Linghong; Lu, Xiaohua] Nanjing Univ Technol, Coll Chem & Chem Engn, Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China.
RP Lu, XH, Nanjing Univ Technol, Coll Chem & Chem Engn, Key Lab Mat
Oriented Chem Engn, 5 Xin Mo Fan Ma Lu, Nanjing 210009, Jiangsu,
Peoples R China.
EM xhlu@njut.edu.cn
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10.1016/j.bpc.2006.04.012
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NR 28
TC 0
PU ELSEVIER SCIENCE BV; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3812
DI 10.1016/j.fluid.2010.05.005
PD OCT 25
VL 297
IS 2
SI Sp. Iss. SI
BP 215
EP 220
SC Thermodynamics; Chemistry, Physical; Engineering, Chemical
GA 657BF
UT ISI:000282385300013
ER

PT J
*Record 3 of 3.
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*Order Full Text [ ]
AU Natarajan, R
Charmant, JPH
Orpen, AG
Davis, AP
AF Natarajan, Ramalingam
Charmant, Jonathan P. H.
Orpen, A. Guy
Davis, Anthony P.
TI Water Chains in Hydrophobic Crystal Channels: Nanoporous Materials as
Supramolecular Analogues of Carbon Nanotubes
SO ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
LA English
DT Article
DE crystal engineering; hydrogen bonding; hydrophobic effect;
supramolecular chemistry; water chains
ID TRANSPORT; MEMBRANES
C1 [Natarajan, Ramalingam; Charmant, Jonathan P. H.; Orpen, A. Guy; Davis, Anthony P.] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England.
RP Davis, AP, Univ Bristol, Sch Chem, Cantocks Close, Bristol BS8 1TS,
Avon, England.
EM anthony.davis@bristol.ac.uk
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NR 19
TC 0
PU WILEY-V C H VERLAG GMBH; PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1433-7851
DI 10.1002/anie.201002418
VL 49
IS 30
BP 5125
EP 5129
SC Chemistry, Multidisciplinary
GA 632NT
UT ISI:000280432100016
ER

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Friday, October 8, 2010

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 AUG 2011
Number of Citing Articles: 4 new records this week (4 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Enhancement of hydrogen gas permeability in electrically aligned MWCNT-PMMA composite membranes

Authors:
Kumar, S; Sharma, A; Tripathi, B; Srivastava, S; Agrawal, S; Singh, M; Awasthi, K; Vijay, YK

Author Full Names:
Kumar, Sumit; Sharma, Anshu; Tripathi, Balram; Srivastava, Subodh; Agrawal, Shweta; Singh, M.; Awasthi, Kamlendra; Vijay, Y. K.

Source:
MICRON 41 (7): 909-914 OCT 2010

Language:
English

Document Type:
Review

Author Keywords:
MWCNT; PM MA; Membrane; Electrical field alignment; Gas permeation; Raman spectroscopy; XRD

KeyWords Plus:
WALL CARBON NANOTUBES; FAST MASS-TRANSPORT; SEPARATION MEMBRANES; POLYMER COMPOSITES; FIELD; PERMEATION; STORAGE; ADSORPTION

Abstract:
The multi-walled carbon nanotube (MWCNT) dispersed polymethylmethacrylate (PMMA) composite membranes have been prepared for hydrogen gas permeation application. Composite membranes are characterized by Raman spectroscopy, optical microscopy, X-ray diffraction, electrical measurements and gas permeability measurements. The effect of electric field alignment of MWCNT in PMMA matrix on gas permeation has been studied for hydrogen gas. The permeability measurements indicated that the electrically aligned MWCNT in PMMA has shown almost 2 times higher permeability for hydrogen gas as compare to randomly dispersed MWCNT in PMMA. The enhancement in permeability is explained on the basis of well aligned easy channel provided by MWCNT in electrically aligned sample. The effect of thickness of membrane on the gas permeability also studied and thickness of about 30 mu m found to be optimum thickness for fast hydrogen gas permeates. (C) 2010 Elsevier Ltd. All rights reserved.

Reprint Address:
Kumar, S, Univ Rajasthan, Dept Phys, Jaipur 302004, Rajasthan, India.

Research Institution addresses:
[Kumar, Sumit; Sharma, Anshu; Tripathi, Balram; Srivastava, Subodh; Agrawal, Shweta; Singh, M.; Vijay, Y. K.] Univ Rajasthan, Dept Phys, Jaipur 302004, Rajasthan, India; [Awasthi, Kamlendra] Indian Inst Technol, Dept Chem Engn, DST Unit Nanosci, Kanpur 208016, Uttar Pradesh, India

E-mail Address:
sumitphy11@gmail.com; yk_vijay@sancharnet.in

Cited References:
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Cited Reference Count:
38

Times Cited:
0

Publisher:
PERGAMON-ELSEVIER SCIENCE LTD; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

Subject Category:
Microscopy

ISSN:
0968-4328

DOI:
10.1016/j.micron.2010.05.016

IDS Number:
652GX

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*Record 2 of 4.
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Title:
Water Diffusion Behaviors and Transportation Properties in Transmembrane Cyclic Hexa-, Octa- and Decapeptide Nanotubes

Authors:
Liu, JA; Fan, JF; Tang, M; Cen, M; Yan, JF; Liu, Z; Zhou, WG

Author Full Names:
Liu, Jian; Fan, Jianfen; Tang, Min; Cen, Min; Yan, Jianfeng; Liu, Zhao; Zhou, Weigun

Source:
JOURNAL OF PHYSICAL CHEMISTRY B 114 (38): 12183-12192 SEP 30 2010

Language:
English

Document Type:
Article

KeyWords Plus:
ASSEMBLING PEPTIDE NANOTUBES; MOLECULAR-DYNAMICS; CARBON NANOTUBES; LIPID-BILAYER; LIQUID WATER; CHANNELS; PERMEATION; ION; MEMBRANES; MODEL

Abstract:
Molecular dynamics simulations have been performed on three transmembrane cyclic peptide nanotubes, i.e., 8 x (W (L) under barL)(n=345)/POPE (with uniform lengths but various radii) to investigate the radial dependences of the water-chain structures, diffusions, and transportation properties. The diffusions of individual water molecules and collective coordinates of all the channel-water in the three systems are certified as unbiased Brownian motions. From the very good linear relationships between MSDs and time intervals, the diffusion coefficients and transportation permeabilities have been deduced efficiently. Under the hydrostatic pressure differences across the membrane, a net unidirectional water flow rose up, and the osmotic permeabilities were determined. The ratios of the osmotic and diffusion permeabilities (p(f)/p(d)) were examined for all the three channels.

Reprint Address:
Fan, JF, Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China.

Research Institution addresses:
[Liu, Jian; Fan, Jianfen; Tang, Min; Cen, Min; Zhou, Weigun] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China; [Yan, Jianfeng; Liu, Zhao] Soochow Univ, Sch Comp Sci & Technol, Suzhou 215006, Peoples R China

E-mail Address:
jffan1305@163.com

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Cited Reference Count:
54

Times Cited:
0

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

Subject Category:
Chemistry, Physical

ISSN:
1520-6106

DOI:
10.1021/jp1039207

IDS Number:
652OV

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Title:
Desalination-of water by vapor-phase transport through hydrophobic nanopores

Authors:
Lee, J; Karnik, R

Author Full Names:
Lee, Jongho; Karnik, Rohit

Source:
JOURNAL OF APPLIED PHYSICS 108 (4): Art. No. 044315 AUG 15 2010

Language:
English

Document Type:
Article

KeyWords Plus:
REVERSE-OSMOSIS MEMBRANES; CONDENSATION COEFFICIENT; EVAPORATION COEFFICIENT; CARBON NANOTUBE; SEAWATER DESALINATION; FUEL-CELLS; DISTILLATION; REDUCTION; SURFACE; MACROMOLECULES

Abstract:
We propose a new approach to desalination of water whereby a pressure difference across a vapor-trapping nanopore induces selective transport of water by isothermal evaporation and condensation across the pore. Transport of water through a nanopore with saline water on one side and pure water on the other side under a pressure difference was theoretically analyzed under the rarefied gas assumption using a probabilistic framework that accounts for diffuse scattering from the pore walls as well as reflection from the menisci. The analysis revealed that in addition to salinity, temperature, and pressure difference, the nanopore aspect ratio and the probability of condensation of a water molecule incident on a meniscus from the vapor phase, known as the condensation coefficient, are key determinants of flux. The effect of condensation coefficient on mass flux becomes critical when the aspect ratio is small. However, the mass flux becomes independent of the condensation coefficien
t as the pore aspect ratio increases, converging to the Knudsen flux for long nanopores. For design of a nanopore membrane that can trap vapor, a minimum aspect ratio is derived for which coalescence of the two interfaces on either side of the nanopore remains energetically unfavorable. Based on this design criterion, the analysis suggests that mass flux in the range of 20-70 g/m(2) s may be feasible if the system is operated at temperatures in the range of 30-50 degrees C. The proposed approach further decouples transport properties from material properties of the membrane, which opens the possibility of engineering membranes with appropriate materials that may lead to reverse osmosis membranes with improved flux, better selectivity, and high chlorine resistance. (C) 2010 American Institute of Physics. [doi:10.1063/1.3419751]

Reprint Address:
Karnik, R, MIT, Dept Mech Engn, Cambridge, MA 02139 USA.

Research Institution addresses:
[Lee, Jongho; Karnik, Rohit] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

E-mail Address:
karnik@mit.edu

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Cited Reference Count:
64

Times Cited:
0

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

Subject Category:
Physics, Applied

ISSN:
0021-8979

DOI:
10.1063/1.3419751

IDS Number:
650NV

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Title:
Stabilities and Electronic Properties of Ice Nanotube Encapsulated in Single-wall Carbon Nanotube

Authors:
Yang, BH; Zhang, AH; Li, L

Author Full Names:
Yang Baohua; Zhang Aihua; Li Lin

Source:
CHINESE JOURNAL OF CHEMISTRY 28 (7): 1076-1080 JUL 2010

Language:
English

Document Type:
Article

Author Keywords:
carbon nanotube; ice nanotube; self-consistent-field crystal orbital method; stability; electronic structure

KeyWords Plus:
WATER

Abstract:
The one-dimensional n-gon ice nanotube and its hybrid structure n-gon@(m,n) are investigated using ab initio self-consistent-field crystal orbital method based on density functional theory. The study focused on the stabilities and electronic properties of ice tube and n-gon@(m,n) complex. The results show that the pentagon and hexagon ice tubes are most stable and all the tubes are semiconductor with the band gap of -6 eV for the isolated ice nanotube. For the complex n-gon@(m,n), the interwall spacing between the carbon nanotube and ice tube plays an important role in the stabilities of resultant structures. The most stable complex has optimum interwall spacing which is close to the van der Waals distance. The frontier energy bands of n-gon@(m,n) complex are mainly derived from carbon nanotube and encapsulation of ice tube can not modulate the electronic properties of CNT.

Reprint Address:
Yang, BH, Capital Med Univ, Yanjing Med Coll, Beijing 101300, Peoples R China.

Research Institution addresses:
[Yang Baohua; Zhang Aihua; Li Lin] Capital Med Univ, Yanjing Med Coll, Beijing 101300, Peoples R China

E-mail Address:
y_b_h_@sohu.com

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Cited Reference Count:
18

Times Cited:
0

Publisher:
WILEY-V C H VERLAG GMBH; PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY

Subject Category:
Chemistry, Multidisciplinary

ISSN:
1001-604X

DOI:
10.1002/cjoc.201090188

IDS Number:
653IV

Please enter your account number here:

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: 09 NOV 2010
Number of Citing Articles: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
pH-Tunable Ion Selectivity in Carbon Nanotube Pores

Authors:
Fornasiero, F; Bin In, J; Kim, S; Park, HG; Wang, Y; Grigoropoulos, CP; Noy, A; Bakajin, O

Author Full Names:
Fornasiero, Francesco; Bin In, Jung; Kim, Sangil; Park, Hyung Gyu; Wang, Yinmin; Grigoropoulos, Costas P.; Noy, Aleksandr; Bakajin, Olgica

Source:
LANGMUIR 26 (18): 14848-14853 SEP 21 2010

Language:
English

Document Type:
Article

KeyWords Plus:
FILLED NANOFILTRATION MEMBRANES; NANOFLUIDIC CHANNELS; ELECTROLYTIC TRANSPORT; REVERSE-OSMOSIS; SILICON-NITRIDE; SALT REJECTION; PERMEATION; SEPARATION; SURFACE; WATER

Abstract:
The selectivity of ion transport in nanochannels is of pi Unary importance for a number of physical, chemical, and biological processes ranging from fluid separation to ion-channel-regulated cellular processes Fundamental understanding of these phenomena requires model nanochannels with well-defined and controllable structural properties Carbon nanotubes provide an ideal choice for nanofluidic studies because of their simple chemistry and structure, the atomic scale smoothness and chemical inertness of the graphitic walls, and the tunability of their diameter and length Here, we investigate the selectivity of single and, for the first time, binary salt mixtures transport through nail ow carbon nanotubes that act as the only pores in a silicon nitride membrane. We demonstrate that negatively charged carboxylic groups are responsible for the ion rejection performance of carbon nanotube pores and that ion permeation of small salts can be tuned by varying solution Investigation o
f the effect of solution composition and ion valences for binary electrolytes with common cation m a pressure-driven flow reveals that the addition of slower diffusing multivalent anions to a solution of faster diffusing monovalent anions favors permeation of the monovalent anion Larger fractions and valences of the added multivalent anions lower the rejection of the monovalent anion. In some cases, we observe negative rejection at low monovalent ion content

Reprint Address:
Bakajin, O, Porifera Inc, Hayward, CA 94545 USA.

Research Institution addresses:
[Kim, Sangil; Bakajin, Olgica] Porifera Inc, Hayward, CA 94545 USA; [Fornasiero, Francesco; Wang, Yinmin; Noy, Aleksandr] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA; [Bin In, Jung; Grigoropoulos, Costas P.] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA; [Park, Hyung Gyu] ETH, Inst Energy Technol, Dept Mech & Proc Engn, Zurich, Switzerland; [Noy, Aleksandr] Univ Calif Merced, Sch Nat Sci, Merced, CA 95344 USA; [Bakajin, Olgica] Univ Calif Davis, NSF Ctr Biophoton Sci & Technol, Sacramento, CA 95817 USA

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67

Times Cited:
0

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

Subject Category:
Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary

ISSN:
0743-7463

DOI:
10.1021/la101943h

IDS Number:
648JV

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ISI Web of Knowledge Alert - Holt JK

ISI Web of Knowledge Citation Alert

Cited Article: Holt JK. Fast mass transport through sub-2-nanometer carbon nanotubes
Alert Expires: 09 NOV 2010
Number of Citing Articles: 5 new records this week (5 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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*Record 1 of 5.
L5 <http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;UT=000281992800031>
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AU Kumar, S
Sharma, A
Tripathi, B
Srivastava, S
Agrawal, S
Singh, M
Awasthi, K
Vijay, YK
AF Kumar, Sumit
Sharma, Anshu
Tripathi, Balram
Srivastava, Subodh
Agrawal, Shweta
Singh, M.
Awasthi, Kamlendra
Vijay, Y. K.
TI Enhancement of hydrogen gas permeability in electrically aligned
MWCNT-PMMA composite membranes
SO MICRON
LA English
DT Review
DE MWCNT; PM MA; Membrane; Electrical field alignment; Gas permeation;
Raman spectroscopy; XRD
ID WALL CARBON NANOTUBES; FAST MASS-TRANSPORT; SEPARATION MEMBRANES;
POLYMER COMPOSITES; FIELD; PERMEATION; STORAGE; ADSORPTION
AB The multi-walled carbon nanotube (MWCNT) dispersed
polymethylmethacrylate (PMMA) composite membranes have been prepared
for hydrogen gas permeation application. Composite membranes are
characterized by Raman spectroscopy, optical microscopy, X-ray
diffraction, electrical measurements and gas permeability measurements.
The effect of electric field alignment of MWCNT in PMMA matrix on gas
permeation has been studied for hydrogen gas. The permeability
measurements indicated that the electrically aligned MWCNT in PMMA has
shown almost 2 times higher permeability for hydrogen gas as compare to
randomly dispersed MWCNT in PMMA. The enhancement in permeability is
explained on the basis of well aligned easy channel provided by MWCNT
in electrically aligned sample. The effect of thickness of membrane on
the gas permeability also studied and thickness of about 30 mu m found
to be optimum thickness for fast hydrogen gas permeates. (C) 2010
Elsevier Ltd. All rights reserved.
C1 [Kumar, Sumit; Sharma, Anshu; Tripathi, Balram; Srivastava, Subodh; Agrawal, Shweta; Singh, M.; Vijay, Y. K.] Univ Rajasthan, Dept Phys, Jaipur 302004, Rajasthan, India.
[Awasthi, Kamlendra] Indian Inst Technol, Dept Chem Engn, DST Unit Nanosci, Kanpur 208016, Uttar Pradesh, India.
RP Kumar, S, Univ Rajasthan, Dept Phys, Jaipur 302004, Rajasthan, India.
EM sumitphy11@gmail.com
yk_vijay@sancharnet.in
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TC 0
PU PERGAMON-ELSEVIER SCIENCE LTD; THE BOULEVARD, LANGFORD LANE,
KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0968-4328
DI 10.1016/j.micron.2010.05.016
PD OCT
VL 41
IS 7
BP 909
EP 914
SC Microscopy
GA 652GX
UT ISI:000281992800031
ER

PT J
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*Order Full Text [ ]
AU Fornasiero, F
Bin In, J
Kim, S
Park, HG
Wang, Y
Grigoropoulos, CP
Noy, A
Bakajin, O
AF Fornasiero, Francesco
Bin In, Jung
Kim, Sangil
Park, Hyung Gyu
Wang, Yinmin
Grigoropoulos, Costas P.
Noy, Aleksandr
Bakajin, Olgica
TI pH-Tunable Ion Selectivity in Carbon Nanotube Pores
SO LANGMUIR
LA English
DT Article
ID FILLED NANOFILTRATION MEMBRANES; NANOFLUIDIC CHANNELS; ELECTROLYTIC
TRANSPORT; REVERSE-OSMOSIS; SILICON-NITRIDE; SALT REJECTION;
PERMEATION; SEPARATION; SURFACE; WATER
AB The selectivity of ion transport in nanochannels is of pi Unary
importance for a number of physical, chemical, and biological processes
ranging from fluid separation to ion-channel-regulated cellular
processes Fundamental understanding of these phenomena requires model
nanochannels with well-defined and controllable structural properties
Carbon nanotubes provide an ideal choice for nanofluidic studies
because of their simple chemistry and structure, the atomic scale
smoothness and chemical inertness of the graphitic walls, and the
tunability of their diameter and length Here, we investigate the
selectivity of single and, for the first time, binary salt mixtures
transport through nail ow carbon nanotubes that act as the only pores
in a silicon nitride membrane. We demonstrate that negatively charged
carboxylic groups are responsible for the ion rejection performance of
carbon nanotube pores and that ion permeation of small salts can be
tuned by varying solution Investigation of the effect of solution
composition and ion valences for binary electrolytes with common cation
m a pressure-driven flow reveals that the addition of slower diffusing
multivalent anions to a solution of faster diffusing monovalent anions
favors permeation of the monovalent anion Larger fractions and valences
of the added multivalent anions lower the rejection of the monovalent
anion. In some cases, we observe negative rejection at low monovalent
ion content
C1 [Kim, Sangil; Bakajin, Olgica] Porifera Inc, Hayward, CA 94545 USA.
[Fornasiero, Francesco; Wang, Yinmin; Noy, Aleksandr] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA.
[Bin In, Jung; Grigoropoulos, Costas P.] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA.
[Park, Hyung Gyu] ETH, Inst Energy Technol, Dept Mech & Proc Engn, Zurich, Switzerland.
[Noy, Aleksandr] Univ Calif Merced, Sch Nat Sci, Merced, CA 95344 USA.
[Bakajin, Olgica] Univ Calif Davis, NSF Ctr Biophoton Sci & Technol, Sacramento, CA 95817 USA.
RP Bakajin, O, Porifera Inc, Hayward, CA 94545 USA.
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NR 67
TC 0
PU AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
DI 10.1021/la101943h
PD SEP 21
VL 26
IS 18
BP 14848
EP 14853
SC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
GA 648JV
UT ISI:000281690600068
ER

PT J
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*Order Full Text [ ]
AU Brady-Estevez, AS
Schnoor, MH
Vecitis, CD
Saleh, NB
Ehmelech, M
AF Brady-Estevez, Anna S.
Schnoor, Mary H.
Vecitis, Chad D.
Saleh, Navid B.
Ehmelech, Menachem
TI Multiwalled Carbon Nanotube Filter: Improving Viral Removal at Low
Pressure
SO LANGMUIR
LA English
DT Article
ID FULLERENE C-60 NANOPARTICLES; SOIL COLUMNS; POROUS-MEDIA; DEPOSITION
KINETICS; ENVIRONMENTAL IMPLICATIONS; AGGREGATION KINETICS; BACTERIAL
PATHOGENS; CERIA NANOPARTICLES; ORGANIC-MATTER; TRANSPORT
AB The effective removal of viruses by a multiwalled carbon nanotube
(MWNT) filter is demonstrated over a range of solution chemistries MS2
bacteriophage viral removal by the MWNT filter was between 1 5 and 3
log higher than that observed with a recently reported single-walled
carbon nanotube (SWNT) filter when examined under similar, loadings (0
3 mg/cm(2)) of carbon nanotubes (CNTs). The greater removal of viruses
by the M W NT filter is attributed to a more uniform CNT-filter matrix
that allows effective removal of viruses by physicochemical (depth)
filtration Viral removal by the MWNT filter was examined under a broad
range of water compositions (ionic strength, monovalent and divalent
salts, solution pH. natural organic matter, alginate, phosphate. and
bicarbonate) and filter approach velocities (0 0016, 0.0044, and 0 0072
cm/s) Log viral removal increased as the fluid approach velocity
decreased, exhibiting a dependence on approach velocity in agreement
with colloid filtration theory for Brownian particles Viral removal
improved with increasing ionic strength (NaCl), from 5 06 log removal
at 1 mM NaCl to greater than 6.56 log removal at 100 mM NaCl Addition
of calcium ions also enhanced viral removal, but the presence of
magnesium ions resulted in a decrease in viral removal Solution pH also
played an important role in viral removal, with log removals of 8 13,
538, and 4 00 being documented at solution pH values of 3 0, 55, and 9
0, respectively Dissolved natural organic matter (NOM) had a negligible
effect on viral removal at low concentration (1 mg/L), but higher
concentrations of NOM significantly reduced the viral removal by the
MWNT filter, likely due to steric repulsion Addition of alginate (model
polysaccharide) also caused a marked decrease in viral removal by the
MWNT filter This highly scalable MWNT-filter technology at
gravity-driven pressures presents new, cost-effective options for
point-of-use filters for viral removal
C1 [Brady-Estevez, Anna S.; Schnoor, Mary H.; Vecitis, Chad D.; Saleh, Navid B.; Ehmelech, Menachem] Yale Univ, Dept Chem & Environm Engn, New Haven, CT 06520 USA.
RP Ehmelech, M, Yale Univ, Dept Chem & Environm Engn, New Haven, CT 06520
USA.
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NR 60
TC 0
PU AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
DI 10.1021/la102783v
PD SEP 21
VL 26
IS 18
BP 14975
EP 14982
SC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
GA 648JV
UT ISI:000281690600087
ER

PT J
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*Order Full Text [ ]
AU Cannon, JJ
Tang, D
Hur, N
Kim, D
AF Cannon, James J.
Tang, Dai
Hur, Nahmkeon
Kim, Daejoong
TI Competitive Entry of Sodium and Potassium into Nanoscale Pores
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATIONS; CARBON NANOTUBE MEMBRANES;
ELECTROOSMOTIC FLOWS; WATER; TRANSPORT; SELECTIVITY; NANOPORES;
HYDRATION; CHANNELS; NA+
AB We have studied the competitive entry of potassium and sodium into
carbon nanotubes using molecular dynamics simulations. Our results
demonstrate how a combination of strong sodium hydration coupled with
strong potassium chlorine interaction leads to enhanced potassium
selectivity at certain diameters. We detail the reasons behind this,
and show how variation of nanotube diameter can cause a switch to
sodium selectivity, or even cause a decrease in overall ion entry
despite an increase in diameter. These results demonstrate the
importance of considering inter-ion dependence in the theoretical study
of pore selectivity and show that, with careful design, the practical
separation of sodium and potassium is possible using diameter variation
alone.
C1 [Cannon, James J.; Tang, Dai; Hur, Nahmkeon; Kim, Daejoong] Sogang Univ, Dept Mech Engn, Seoul 121742, South Korea.
[Cannon, James J.; Hur, Nahmkeon; Kim, Daejoong] Sogang Univ, Multiphenomena CFD ERC, Seoul 121742, South Korea.
RP Kim, D, Sogang Univ, Dept Mech Engn, 1 Shinsu Dong, Seoul 121742, South
Korea.
EM Daejoong@sogang.ac.kr
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NR 34
TC 0
PU AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
DI 10.1021/jp104609d
PD SEP 30
VL 114
IS 38
BP 12252
EP 12256
SC Chemistry, Physical
GA 652OV
UT ISI:000282018100008
ER

PT J
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*Order Full Text [ ]
AU Lee, J
Karnik, R
AF Lee, Jongho
Karnik, Rohit
TI Desalination-of water by vapor-phase transport through hydrophobic
nanopores
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID REVERSE-OSMOSIS MEMBRANES; CONDENSATION COEFFICIENT; EVAPORATION
COEFFICIENT; CARBON NANOTUBE; SEAWATER DESALINATION; FUEL-CELLS;
DISTILLATION; REDUCTION; SURFACE; MACROMOLECULES
AB We propose a new approach to desalination of water whereby a pressure
difference across a vapor-trapping nanopore induces selective transport
of water by isothermal evaporation and condensation across the pore.
Transport of water through a nanopore with saline water on one side and
pure water on the other side under a pressure difference was
theoretically analyzed under the rarefied gas assumption using a
probabilistic framework that accounts for diffuse scattering from the
pore walls as well as reflection from the menisci. The analysis
revealed that in addition to salinity, temperature, and pressure
difference, the nanopore aspect ratio and the probability of
condensation of a water molecule incident on a meniscus from the vapor
phase, known as the condensation coefficient, are key determinants of
flux. The effect of condensation coefficient on mass flux becomes
critical when the aspect ratio is small. However, the mass flux becomes
independent of the condensation coefficient as the pore aspect ratio
increases, converging to the Knudsen flux for long nanopores. For
design of a nanopore membrane that can trap vapor, a minimum aspect
ratio is derived for which coalescence of the two interfaces on either
side of the nanopore remains energetically unfavorable. Based on this
design criterion, the analysis suggests that mass flux in the range of
20-70 g/m(2) s may be feasible if the system is operated at
temperatures in the range of 30-50 degrees C. The proposed approach
further decouples transport properties from material properties of the
membrane, which opens the possibility of engineering membranes with
appropriate materials that may lead to reverse osmosis membranes with
improved flux, better selectivity, and high chlorine resistance. (C)
2010 American Institute of Physics. [doi:10.1063/1.3419751]
C1 [Lee, Jongho; Karnik, Rohit] MIT, Dept Mech Engn, Cambridge, MA 02139 USA.
RP Karnik, R, MIT, Dept Mech Engn, Cambridge, MA 02139 USA.
EM karnik@mit.edu
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NR 64
TC 0
PU AMER INST PHYSICS; CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON
QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
DI 10.1063/1.3419751
PD AUG 15
VL 108
IS 4
AR 044315
SC Physics, Applied
GA 650NV
UT ISI:000281857100119
ER

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ISI Web of Knowledge Alert - Sokhan VP

ISI Web of Knowledge Citation Alert

Title:
Water Diffusion Behaviors and Transportation Properties in Transmembrane Cyclic Hexa-, Octa- and Decapeptide Nanotubes

Authors:
Liu, JA; Fan, JF; Tang, M; Cen, M; Yan, JF; Liu, Z; Zhou, WG

Author Full Names:
Liu, Jian; Fan, Jianfen; Tang, Min; Cen, Min; Yan, Jianfeng; Liu, Zhao; Zhou, Weigun

Source:
JOURNAL OF PHYSICAL CHEMISTRY B 114 (38): 12183-12192 SEP 30 2010

Language:
English

Document Type:
Article

KeyWords Plus:
ASSEMBLING PEPTIDE NANOTUBES; MOLECULAR-DYNAMICS; CARBON NANOTUBES; LIPID-BILAYER; LIQUID WATER; CHANNELS; PERMEATION; ION; MEMBRANES; MODEL

Reprint Address:
Fan, JF, Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China.

E-mail Address:
jffan1305@163.com

Cited Reference Count:
54

Times Cited:
0

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

Subject Category:
Chemistry, Physical

ISSN:
1520-6106

DOI:
10.1021/jp1039207

IDS Number:
652OV

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