Friday, November 19, 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: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Approximation of super-ions for single-file diffusion of multiple ions through narrow pores

Authors:
Kharkyanen, VN; Yesylevskyy, SO; Berezetskaya, NM

Author Full Names:
Kharkyanen, Valery N.; Yesylevskyy, Semen O.; Berezetskaya, Natalia M.

Source:
PHYSICAL REVIEW E 82 (5): Art. No. 051103 Part 1 NOV 3 2010

Language:
English

Document Type:
Article

KeyWords Plus:
MOLECULAR-DYNAMICS; POTASSIUM CHANNEL; BROWNIAN DYNAMICS; K+ CHANNEL; CONDUCTION; MODELS; SELECTIVITY; PERMEATION; CONTINUUM; WATER

Abstract:
The general theory of the single-file multiparticle diffusion in the narrow pores could be greatly simplified in the case of inverted bell-like shape of the single-particle energy profile, which is often observed in biological ion channels. There is a narrow and deep groove in the energy landscape of multiple interacting ions in such profiles, which corresponds to the pre-defined optimal conduction pathway in the configurational space. If such groove exists, the motion of multiple ions can be reduced to the motion of single quasiparticle, called the superion, which moves in one-dimensional effective potential. The concept of the superions dramatically reduces the computational complexity of the problem and provides very clear physical interpretation of conduction phenomena in the narrow pores.

Reprint Address:
Kharkyanen, VN, Natl Acad Sci Ukraine, Inst Phys, Dept Phys Biol Syst, Prospect Nauki 46, UA-03039 Kiev, Ukraine.

Research Institution addresses:
[Kharkyanen, Valery N.; Yesylevskyy, Semen O.; Berezetskaya, Natalia M.] Natl Acad Sci Ukraine, Inst Phys, Dept Phys Biol Syst, UA-03039 Kiev, Ukraine

Cited References:
AKSIMENTIEV A, 2005, BIOPHYS J, V88, P3745, DOI 10.1529/biophysj.104.058727.
BERNECHE S, 2000, BIOPHYS J, V78, P2900.
BERNECHE S, 2001, NATURE, V414, P73.
CHANG S, 1999, BIOPHYS J, V77, P2517.
CHUNG SH, 2002, BIOPHYS J, V82, P628.
COMPOINT M, 2004, BBA-BIOMEMBRANES, V1661, P26, DOI 10.1016/j.bbamem.2003.11.019.
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HILLE B, 2001, ION CHANNELS EXCITAB.
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KHARKYANEN VN, 2009, PHYS REV E 1, V80, ARTN 031118.
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ZHU FQ, 2003, BIOPHYS J, V85, P236.

Cited Reference Count:
19

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.82.051103

IDS Number:
674VF

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Friday, November 12, 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: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Hydrophobic Peptide Channels and Encapsulated Water Wires

Authors:
Raghavender, US; Kantharaju; Aravinda, S; Shamala, N; Balaram, P

Author Full Names:
Raghavender, Upadhyayula S.; Kantharaju; Aravinda, Subrayashastry; Shamala, Narayanaswamy; Balaram, Padmanabhan

Source:
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 132 (3): 1075-1086 JAN 27 2010

Language:
English

Document Type:
Article

KeyWords Plus:
ASSEMBLING ORGANIC NANOTUBES; TRANSMEMBRANE ION CHANNELS; M2 PROTON CHANNEL; MOLECULAR-DYNAMICS; CRYSTAL-STRUCTURES; RHODOBACTER-SPHAEROIDES; BIOMOLECULAR SYSTEMS; CARBONIC-ANHYDRASE; NAK CHANNEL; CHAIN

Abstract:
Peptide nanotubes with filled and empty pores and close-packed structures are formed in closely related pentapeptides. Enantiomorphic sequences, Boc-(D)Pro-Aib-Xxx-Aib-Val-OMe (Xxx = Leu, 1; Val, 2; Ala, 3; Phe, 4) and Boc-Pro-Aib-(D)Xxx-Aib-(D)Val-OMe ((XXX)-X-D = (D)Leu, 5; (D)Val, 6; (D)Ala, 7; (D)Phe, 8), yield molecular structures with a very similar backbone conformation but varied packing patterns in crystals. Peptides 1, 2, 5, and 6 show tubular structures with the molecules self-assembling along the crystallographic six-fold axis (c-axis) and revealing a honeycomb arrangement laterally (ab plane). Two forms of entrapped water wires have been characterized in 2: 2a with d(O center dot center dot center dot O) = 2.6 angstrom and 2b with d(O center dot center dot center dot O) = 3.5 angstrom. The latter is observed in 6 (6a) also. A polymorphic form of 6 (6b), grown from a solution of methanol-water, was observed to crystallize in a monoclinic system as a close-packed s
tructure. Single-file water wire arrangements encapsulated inside hydrophobic channels formed by peptide nanotubes could be established by modeling the published structures in the cases of a cyclic peptide and a dipeptide. In all the entrapped water wires, each water molecule is involved in a hydrogen bond with a previous and succeeding water molecule. The O-H group of the water not involved in any hydrogen bond does not seem to be involved in an energetically significant interaction with the nanotube interior, a general feature of the one-dimensional water wires encapsulated in hydrophobic environements. Water wires in hydrophobic channels are contrasted with the single-file arrangements in amphipathic channels formed by aquaporins.

Reprint Address:
Shamala, N, Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India.

Research Institution addresses:
[Raghavender, Upadhyayula S.; Aravinda, Subrayashastry; Shamala, Narayanaswamy] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India; [Kantharaju; Balaram, Padmanabhan] Indian Inst Sci, Mol Biophys Unit, Bangalore 560012, Karnataka, India

E-mail Address:
shamala@physics.iisc.ernet.in; pb@mbu.iisc.ernet.in

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Cited Reference Count:
74

Times Cited:
2

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

Subject Category:
Chemistry, Multidisciplinary

ISSN:
0002-7863

DOI:
10.1021/ja9083978

IDS Number:
562VZ

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Friday, November 5, 2010

ISI Web of Knowledge Alert Expiration Notice

ISI Web of Knowledge Citation Alert Expiration Notice

Cited Article: Zhou, X. Equilibrium and kinetics: Water confined in carbon nanotubes as one-dimensional lattice gas
Alert Expires: 09 NOV 2010
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b

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ISI Web of Knowledge Alert Expiration Notice

ISI Web of Knowledge Citation Alert Expiration Notice

Cited Article: Maibaum, L. A coarse-grained model of water confined in a hydrophobic tube
Alert Expires: 09 NOV 2010
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b

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ISI Web of Knowledge Alert Expiration Notice

ISI Web of Knowledge Citation Alert Expiration Notice

Cited Article: Saparov, S. Mobility of a one-dimensional confined file of water molecules as a function of file length
Alert Expires: 09 NOV 2010
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b

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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: 09 NOV 2010
Number of Citing Articles: 3 new records this week (3 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Molecular Dynamics Simulation of Composite Nanochannels as Nanopumps Driven by Symmetric Temperature Gradients

Authors:
Liu, C; Li, ZG

Author Full Names:
Liu, Chong; Li, Zhigang

Source:
PHYSICAL REVIEW LETTERS 105 (17): Art. No. 174501 OCT 18 2010

Language:
English

Document Type:
Article

KeyWords Plus:
BOUNDARY-CONDITIONS; FLOW; SLIP

Abstract:
In this Letter, we propose a composite nanochannel system, where half of the channel is of low surface energy, while the other half has a relatively high surface energy. Molecular dynamics simulations show that fluids in such channels can be continuously driven by a symmetric temperature gradient. In the low surface energy part, the fluid moves from high to low temperature, while the fluid migrates from low to high temperature in the high surface energy part. The mechanisms that govern the flow are explained and the conditions required to guarantee the flow and the possible applications are discussed.

Reprint Address:
Liu, C, Hong Kong Univ Sci & Technol, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China.

Research Institution addresses:
[Liu, Chong; Li, Zhigang] Hong Kong Univ Sci & Technol, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China

E-mail Address:
mezli@ust.hk

Cited References:
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Cited Reference Count:
22

Times Cited:
0

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

Subject Category:
Physics, Multidisciplinary

ISSN:
0031-9007

DOI:
10.1103/PhysRevLett.105.174501

IDS Number:
665SB

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

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Title:
Molecular Dynamics Simulation of Composite Nanochannels as Nanopumps Driven by Symmetric Temperature Gradients

Authors:
Liu, C; Li, ZG

Author Full Names:
Liu, Chong; Li, Zhigang

Source:
PHYSICAL REVIEW LETTERS 105 (17): - OCT 18 2010

Language:
English

Document Type:
Article

KeyWords Plus:
BOUNDARY-CONDITIONS; FLOW; SLIP

Abstract:
In this Letter, we propose a composite nanochannel system, where half of the channel is of low surface energy, while the other half has a relatively high surface energy. Molecular dynamics simulations show that fluids in such channels can be continuously driven by a symmetric temperature gradient. In the low surface energy part, the fluid moves from high to low temperature, while the fluid migrates from low to high temperature in the high surface energy part. The mechanisms that govern the flow are explained and the conditions required to guarantee the flow and the possible applications are discussed.

Reprint Address:
Liu, C, Hong Kong Univ Sci & Technol, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China.

Research Institution addresses:
[Liu, Chong; Li, Zhigang] Hong Kong Univ Sci & Technol, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China

E-mail Address:
mezli@ust.hk

Cited References:
ALLEN MP, 1987, COMPUTER SIMULATION.
BRZOSKA JB, 1993, LANGMUIR, V9, P2220.
CHAUDHURY MK, 1992, SCIENCE, V256, P1539.
CIEPLAK M, 2001, PHYS REV LETT, V86, P803.
DARHUBER AA, 2005, ANNU REV FLUID MECH, V37, P425, DOI 10.1146/annurev.fluid.36.050802.122052.
DUKE TAJ, 1998, PHYS REV LETT, V80, P1552.
GARIMELLA SV, 2006, MICROELECTRON J, V37, P1165, DOI 10.1016/j.mejo.2005.07.017.
GHOSH S, 2003, SCIENCE, V299, P1042, DOI 10.1126/science.1079080.
GONG XJ, 2007, NAT NANOTECHNOL, V2, P709, DOI 10.1038/nnano.2007.320.
GUTTENBERG Z, 2004, PHYS REV E 2, V70, ARTN 056311.
HEINBUCH U, 1989, PHYS REV A, V40, P1144.
LI ZG, 2005, PHYS REV LETT, V95, ARTN 014502.
LI ZG, 2007, J CHEM PHYS, V127, P74706, ARTN 074706.
LI ZG, 2009, PHYS REV E 1, V80, ARTN 061204.
LIU C, 2009, PHYS REV E 2, V80, ARTN 036302.
PENNATHUR S, 2005, ANAL CHEM, V77, P6782, DOI 10.1021/ac0508346.
RAUSCHER M, 2007, PHYS REV LETT, V98, ARTN 224504.
SQUIRES TM, 2005, REV MOD PHYS, V77, P977.
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Cited Reference Count:
22

Times Cited:
0

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

Subject Category:
Physics, Multidisciplinary

ISSN:
0031-9007

IDS Number:
665SB

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Title:
Carbon nanotube-guided thermopower waves

Authors:
Choi, W; Abrahamson, JT; Strano, JM; Strano, MS

Author Full Names:
Choi, Wonjoon; Abrahamson, Joel T.; Strano, Jennifer M.; Strano, Michael S.

Source:
MATERIALS TODAY 13 (10): 22-33 OCT 2010

Language:
English

Document Type:
Review

KeyWords Plus:
DIMENSIONAL THERMOELECTRIC-MATERIALS; RDX FLAME STRUCTURE; TRANSPORT-PROPERTIES; TELLURIDE NANOWIRES; HYDROGEN GENERATOR; SILICON NANOWIRES; POWER-GENERATION; BI NANOWIRES; COMBUSTION; IGNITION

Abstract:
Thermopower waves are a new concept for the direct conversion of chemical to electrical energy. A nanowire with large axial thermal diffusivity can accelerate a self-propagating reaction wave using a fuel coated along its length. The reaction wave drives electrical carriers in a thermopower wave, creating a high-power pulse of as much as 7 kW/kg in experiments using carbon nanotubes. We review nanomaterials designed to overcome limitations of thermoelectricity and explore the emerging scientific and practical outlook for devices using thermopower waves.

Reprint Address:
Strano, MS, MIT, Dept Chem Engn, Cambridge, MA 02139 USA.

Research Institution addresses:
[Choi, Wonjoon; Abrahamson, Joel T.; Strano, Jennifer M.; Strano, Michael S.] MIT, Dept Chem Engn, Cambridge, MA 02139 USA; [Choi, Wonjoon] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

E-mail Address:
strano@mit.edu

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76

Times Cited:
0

Publisher:
ELSEVIER SCI LTD; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND

Subject Category:
Materials Science, Multidisciplinary

ISSN:
1369-7021

IDS Number:
665QB

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Title:
Signal transmission, conversion and multiplication by polar molecules confined in nanochannels

Authors:
Tu, YS; Zhou, RH; Fang, HP

Author Full Names:
Tu, Yusong; Zhou, Ruhong; Fang, Haiping

Source:
NANOSCALE 2 (10): 1976-1983 2010

Language:
English

Document Type:
Article

KeyWords Plus:
JUNCTION CARBON NANOTUBES; CELL POLARITY; ELECTRICAL SYNAPSES; MULTIDOMAIN PROTEIN; REPLICA EXCHANGE; MAMMALIAN BRAIN; ENERGY-TRANSFER; WATER CHANNEL; DIPOLE CHAINS; LOGIC GATES

Abstract:
The mechanism of signal transmission, conversion and multiplication at molecular level has been of great interest lately, due to its wide applications in nanoscience and nanotechnology. The interferences between authentic signals and thermal noises at the nanoscale make it difficult for molecular signal transduction. Here we review some of our recent progress on the signal transduction mediated by water and other polar molecules confined in nanochannels, such as Y-shaped carbon nanotubes. We also explore possible future directions in this emerging field. These studies on molecular signal conduction might have significance in future designs and applications of nanoscale electronic devices, and might also provide useful insights for a better understanding of signal conduction in both physical and biological systems.

Reprint Address:
Zhou, RH, IBM Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA.

Research Institution addresses:
[Zhou, Ruhong] IBM Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA; [Tu, Yusong; Fang, Haiping] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China; [Tu, Yusong] Shanghai Univ, Inst Syst Biol, Shanghai, Peoples R China; [Tu, Yusong] Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China; [Zhou, Ruhong] Columbia Univ, Dept Chem, New York, NY 10027 USA

E-mail Address:
ruhongz@us.ibm.com; fanghaiping@sinap.ac.cn

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67

Times Cited:
0

Publisher:
ROYAL SOC CHEMISTRY; THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND

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

ISSN:
2040-3364

DOI:
10.1039/c0nr00304b

IDS Number:
660YP

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Title:
Understanding the Stabilization of Liquid-Phase-Exfoliated Graphene in Polar Solvents: Molecular Dynamics Simulations and Kinetic Theory of Colloid Aggregation

Authors:
Shih, CJ; Lin, SC; Strano, MS; Blankschtein, D

Author Full Names:
Shih, Chih-Jen; Lin, Shangchao; Strano, Michael S.; Blankschtein, Daniel

Source:
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 132 (41): 14638-14648 OCT 20 2010

Language:
English

Document Type:
Article

KeyWords Plus:
LINEAR CONSTRAINT SOLVER; PARTICLE MESH EWALD; CARBON NANOTUBES; GRAPHITE; WATER; DISPERSIONS; NANOSHEETS; MODELS; LINCS; FIELD

Abstract:
Understanding the solution-phase dispersion of pristine, unfunctionalized graphene is important for the production of conducting inks and top-down approaches to electronics. This process can also be used as a higher-quality alternative to chemical vapor deposition. We have developed a theoretical framework that utilizes molecular dynamics simulations and the kinetic theory of colloid aggregation to elucidate the mechanism of stabilization of liquid-phase-exfoliated graphene sheets in N-methylpyrrolidone (NMP), N,N'-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), gamma-butyrolactone (GBL), and water. By calculating the potential of mean force between two solvated graphene sheets using molecular dynamics (MD) simulations, we have found that the dominant barrier hindering the aggregation of graphene is the last layer of confined solvent molecules between the graphene sheets, which results from the strong affinity of the solvent molecules for graphene. The origin of the energ
y barrier responsible for repelling the sheets is the steric repulsions between solvent molecules and graphene before the desorption of the confined single layer of solvent. We have formulated a kinetic theory of colloid aggregation to model the aggregation of graphene sheets in the liquid phase in order to predict the stability using the potential of mean force. With only one adjustable parameter, the average collision area, which can be estimated from experimental data, our theory can describe the experimentally observed degradation of the single-layer graphene fraction in NMP. We have used these results to rank the potential solvents according to their ability to disperse pristine, unfunctionalized graphene as follows: NMP approximate to DMSO > DMF > GBL > H2O. This is consistent with the widespread use of the first three solvents for this purpose.

Reprint Address:
Blankschtein, D, MIT, Dept Chem Engn, Cambridge, MA 02139 USA.

Research Institution addresses:
[Shih, Chih-Jen; Lin, Shangchao; Strano, Michael S.; Blankschtein, Daniel] MIT, Dept Chem Engn, Cambridge, MA 02139 USA; [Lin, Shangchao] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

E-mail Address:
dblank@mit.edu

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Cited Reference Count:
59

Times Cited:
0

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

Subject Category:
Chemistry, Multidisciplinary

ISSN:
0002-7863

DOI:
10.1021/ja1064284

IDS Number:
668NN

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Title:
Gas Separation by Kinked Single-Walled Carbon Nanotubes

Authors:
Zhang, ZQ; Zhang, HW

Author Full Names:
Zhang, Z. Q.; Zhang, H. W.

Source:
ISCM II AND EPMESC XII, PTS 1 AND 2 1233: 770-775 2010

Language:
English

Document Type:
Proceedings Paper

Author Keywords:
Molecular Dynamics; Gas Separation; Carbon Nanotubes

KeyWords Plus:
MASS-TRANSPORT; MEMBRANES; FLOW; GRAPHITE; NITROGEN

Abstract:
A kink model for gas separation is presented. Transport of pure nitrogen, oxygen and their mixture in single walled carbon nanotubes (SWCNTs) with a kink formed by bending is studied using molecular dynamics simulations. The results show that a kinked SWCNT results in transport resistance to nitrogen while allowing oxygen to pass even though the two gases have very similar molecular sizes. The permeability decreases while the selectivity increases with increasing the bending angle of SWCNTs. The tradeoff between permeability and selectivity is evaluated by linear weighting method to attain an optimum bending angle for gas separation. It is also found that the kink model can be used to improve the permeability by changing the diameter of the SWCNTs while keeping a high selectivity in the gas separation process. Both the permeability and purity of oxygen increase with increasing the gas pressure. Interestingly, it is very convenient to obtain the required purity and permeabilit
y of the oxygen by adjusting the bending angle of SWCNTs.

Reprint Address:
Zhang, ZQ, Dalian Univ Technol, Fac Vehicle Engn & Mech, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China.

Research Institution addresses:
[Zhang, Z. Q.; Zhang, H. W.] Dalian Univ Technol, Fac Vehicle Engn & Mech, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China

E-mail Address:
zhanghw@dlut.edu.cn

Cited References:
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Cited Reference Count:
22

Times Cited:
0

Publisher:
AMER INST PHYSICS; 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA

ISSN:
0094-243X

IDS Number:
BRL16

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ISI Web of Knowledge Citation Alert

Cited Article: Thompson, P. A general boundary condition for liquid flow at solid surfaces
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Title:
Poly(N-isopropylacrylamide) grafting on aluminium to actively switch its surface drag in water

Authors:
Hyakutake, T; Navrotskiy, AV; Morita, K; Kato, J; Sakaue, H; Novakov, IA; Nishide, H

Author Full Names:
Hyakutake, Tsuyoshi; Navrotskiy, Alexander V.; Morita, Katsuaki; Kato, Junji; Sakaue, Hirotaka; Novakov, Ivan A.; Nishide, Hiroyuki

Source:
POLYMER INTERNATIONAL 59 (10): 1436-1440 OCT 2010

Language:
English

Document Type:
Article

Author Keywords:
graft polymerization; poly(N-isopropylacrylamide); surface modification; temperature sensitive

KeyWords Plus:
TRANSFER RADICAL POLYMERIZATION; BRUSHES; NANOPARTICLES; HYDROGELS

Abstract:
Active control of flow over object surfaces achieved by means of mechanical and/or electrical methods has recently been studied. However, there has been no report on actively switching the surface drag of an object by chemical modification of the object's surface. Poly(N-isopropylacrylamide) (PNIPA) was grafted onto the surface of an aluminium (Al) substrate via (A) surface-initiated atom transfer radical polymerization and (B) radical polymerization with an azo-group surface initiator. The grafting density was 0.19 and 0.15 chains nm(-2), respectively. The water contact angle of the PNIPA-grafted Al surface reversibly changed between 55 and 82 for (A) and between 42 degrees and 65 degrees for (B) at temperatures of 25 and 40 degrees C, which was ascribed to the temperature-responsive, hydrophilic-hydrophobic switching of the grafted PNIPA surface. The PNIPA grafting was applied on the surface of an ogive-shaped Al model. The normalized dropping speed of the model in water in
creased 1.1 times at 42 degrees C in comparison to that at 22 degrees C. Switching of the surface drag of PNIPA-grafted Al in water was demonstrated on the basis of the hydrophilicity and hydrophobicity of the grafted Al surface, the switching occurring with a change in temperature. (C) 2010 Society of Chemical Industry

Reprint Address:
Nishide, H, Waseda Univ, Dept Appl Chem, Tokyo 1698555, Japan.

Research Institution addresses:
[Hyakutake, Tsuyoshi; Kato, Junji; Nishide, Hiroyuki] Waseda Univ, Dept Appl Chem, Tokyo 1698555, Japan; [Navrotskiy, Alexander V.; Novakov, Ivan A.] Volgograd State Tech Univ, Volgograd 400131, Russia; [Morita, Katsuaki; Sakaue, Hirotaka] Japan Aerosp Explorat Agcy, Chofu, Tokyo 1828522, Japan

E-mail Address:
nishide@waseda.jp

Cited References:
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Cited Reference Count:
28

Times Cited:
0

Publisher:
JOHN WILEY & SONS LTD; THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND

Subject Category:
Polymer Science

ISSN:
0959-8103

DOI:
10.1002/pi.2887

IDS Number:
666GT

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Title:
Critical transport of polymeric electrolytes in wavy-rough microtube

Authors:
Chu, ZKH

Author Full Names:
Chu, Z. Kwang-Hua

Source:
JOURNAL OF APPLIED PHYSICS 108 (7): Art. No. 074906 OCT 1 2010

Language:
English

Document Type:
Article

KeyWords Plus:
VISCOSITY; ION; SURFACES; RATES; FLOW

Abstract:
We obtain the steady velocities and volume flow rates (up to the second order) of polymeric electrolytes along the cross-section of an (approximated) wavy-rough microtube by using the verified Eyring's transition rate model and boundary perturbation method. Our numerical results show that the wavy-roughness could tune the electric-field-driven transport especially for larger forcing due to the larger surface-to-volume ratio and slip-velocity effect. We also found a rather low electrical resistance for certain critical temperature after careful selection of geometric and material parameters. (C) 2010 American Institute of Physics. [doi:10.1063/1.3493156]

Reprint Address:
Chu, ZKH, Inner Mongolia Univ Sci & Technol, Sch Math Phys & Biol Engn, Baotou 014010, Peoples R China.

Research Institution addresses:
Inner Mongolia Univ Sci & Technol, Sch Math Phys & Biol Engn, Baotou 014010, Peoples R China

E-mail Address:
chukh49@gmail.com

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Cited Reference Count:
22

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:
10.1063/1.3493156

IDS Number:
667UW

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Title:
Nanoscale Poiseuille Flows of Liquid Argon

Authors:
Liu, C; Li, ZG

Author Full Names:
Liu, Chong; Li, Zhigang

Source:
ISCM II AND EPMESC XII, PTS 1 AND 2 1233: 366-371 2010

Language:
English

Document Type:
Proceedings Paper

Author Keywords:
Nanoscale; Poiseuille flow; Liquid argon

KeyWords Plus:
FLUID-SOLID INTERFACE; BOUNDARY-CONDITIONS; MOLECULAR-DYNAMICS; SLIP LENGTH; SHEAR-FLOW; SURFACES

Abstract:
In nanoscale flow systems, the flow motion is affected by many parameters, some of which may play different roles under different conditions. In this work, we investigate the flux of liquid argon in nanoscale Poiseuille flows through molecular dynamics simulations. By illustrating the flux as a function of a dimensionless number, which represents the effective surface effect on the fluid, we show that the fluid motion in nanochannels under small external forces can be categorized into two regimes based on the role of the temperature. For lame external forces, a bimodal behavior in the flux is observed as the fluid-wall interaction is varied. The underlying mechanisms that govern the flow fashions are discussed.

Reprint Address:
Liu, C, Hong Kong Univ Sci & Technol, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China.

Research Institution addresses:
[Liu, Chong; Li, Zhigang] Hong Kong Univ Sci & Technol, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China

E-mail Address:
mezli@ust.hk

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Cited Reference Count:
21

Times Cited:
0

Publisher:
AMER INST PHYSICS; 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA

ISSN:
0094-243X

IDS Number:
BRL16

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

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Title:
EFFECTS OF CHANNEL SCALE ON SLIP LENGTH OF FLOW IN MICRO/NANO-CHANNELS

Authors:
Yang, XF; Zheng, ZQC

Author Full Names:
Yang, Xiaofan; Zheng, Zhongquan C.

Source:
FEDSM2009, VOL 2 : 477-482 2009

Language:
English

Document Type:
Proceedings Paper

KeyWords Plus:
MOLECULAR-DYNAMICS; BOUNDARY-CONDITIONS; SOLID-SURFACES; HYBRID METHOD; FLUID-FLOW; CONTINUUM; SIMULATION; PARTICLE; MODEL

Abstract:
The concept of slip length, related to surface velocity and shear rate, is often used to analyze the slip surface property for flow in micro or nano-channels. In this study, a hybrid scheme that couples Molecular dynamics simulation (used near the solid boundary to include the surface effect) and a continuum solution (to study the fluid mechanics) is validated and used for the study of slip length behavior in the Couette flow problem. By varying the height of the channel across multiple length scales, we investigate the effect of channel scale on surface slip length. In addition, by changing the velocity of the moving-solid wall, the influence of shear rate on the slip length in a certain ranee of the channel height is studied. The results show that within a certain range of the channel heights, the slip length is size-dependant. This upper bound of the channel height can vary with the shear rate.

Reprint Address:
Yang, XF, Kansas State Univ, Manhattan, KS 66506 USA.

Research Institution addresses:
[Yang, Xiaofan; Zheng, Zhongquan C.] Kansas State Univ, Manhattan, KS 66506 USA

E-mail Address:
xiaofan@ksu.edu; zzheng@ksu.edu

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Cited Reference Count:
23

Times Cited:
0

Publisher:
AMER SOC MECHANICAL ENGINEERS; THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA

IDS Number:
BRK49

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Cited Article: Zhao, Y. Individual water-filled single-walled carbon nanotubes as hydroelectric power converters
Alert Expires: 09 NOV 2010
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FN ISI Export Format
VR 1.0

PT J
*Record 1 of 2.
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*Order Full Text [ ]
AU Li, HB
Gui, XC
Zhang, LH
Wang, SS
Ji, CY
Wei, JQ
Wang, KL
Zhu, HW
Wu, DH
Cao, AY
AF Li, Hongbian
Gui, Xuchun
Zhang, Luhui
Wang, Shanshan
Ji, Chunyan
Wei, Jinquan
Wang, Kunlin
Zhu, Hongwei
Wu, Dehai
Cao, Anyuan
TI Carbon nanotube sponge filters for trapping nanoparticles and dye
molecules from water
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID MEMBRANES; NANOMATERIALS; FILTRATION; EFFICIENCY
AB Carbon nanotube sponges show effective filtration for nanoparticles and
dye molecules with different sizes and concentrations from water. The
three-dimensional interconnected porous structure formed by entangled
nanotubes can trap nanoparticles and molecules by physisorption without
the need for chemical functionalization. The sponge filters are
potential environmental materials for water treatment.
C1 [Li, Hongbian; Zhang, Luhui; Wang, Shanshan; Ji, Chunyan; Cao, Anyuan] Peking Univ, Coll Engn, Dept Adv Mat & Nanotechnol, Beijing 100871, Peoples R China.
[Gui, Xuchun; Wei, Jinquan; Wang, Kunlin; Zhu, Hongwei; Wu, Dehai] Tsinghua Univ, Key Lab Adv Mat Proc Technol, Beijing 100084, Peoples R China.
[Gui, Xuchun; Wei, Jinquan; Wang, Kunlin; Zhu, Hongwei; Wu, Dehai] Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China.
RP Cao, AY, Peking Univ, Coll Engn, Dept Adv Mat & Nanotechnol, Beijing
100871, Peoples R China.
EM anyuan@pku.edu.cn
CR DAS RN, 2009, NANO LETT, V9, P677, DOI 10.1021/nl803168s
FRENS G, 1973, NATURE-PHYS SCI, V241, P20
GUI XC, 2010, ADV MATER, V22, P617, DOI 10.1002/adma.200902986
HALONEN N, 2010, ACS NANO, V4, P2003, DOI 10.1021/nn100150x
HINDS BJ, 2004, SCIENCE, V303, P62, DOI 10.1126/science.1092048
HOLT JK, 2006, SCIENCE, V312, P1034, DOI 10.1126/science.1126298
HUANG HL, 2006, ENVIRON SCI TECHNOL, V40, P4761, DOI 10.1021/es060034s
KANG PK, 1997, LANGMUIR, V13, P1820
LI XS, 2007, SMALL, V3, P595, DOI 10.1002/smll.200600652
LIMBACH LK, 2008, ENVIRON SCI TECHNOL, V42, P5828, DOI 10.1021/es800091f
MAUTER MS, 2008, ENVIRON SCI TECHNOL, V42, P5843, DOI 10.1021/es8006904
QIU S, 2009, J MEMBRANE SCI, V342, P165, DOI
10.1016/j.memsci.2009.06.041
SRIVASTAVA A, 2004, NAT MATER, V3, P610, DOI 10.1038/nmat1192
VISWANATHAN G, 2004, ADV MATER, V16, P2045, DOI 10.1002/adma.200400463
WIESNER MR, 2006, ENVIRON SCI TECHNOL, V40, P4336
YU M, 2009, NANO LETT, V9, P225, DOI 10.1021/nl802816h
ZHANG Y, 1999, CHIN J INORG CHEM, V15, P595
NR 17
TC 0
PU ROYAL SOC CHEMISTRY; THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD,
CAMBRIDGE CB4 0WF, CAMBS,
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SC Chemistry, Multidisciplinary
GA 668HY
UT ISI:000283260400028
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PT S
*Record 2 of 2.
L5 <http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;UT=000283003800132>
*Order Full Text [ ]
AU Zhang, ZQ
Zhang, HW
AF Zhang, Z. Q.
Zhang, H. W.
TI Gas Separation by Kinked Single-Walled Carbon Nanotubes
SO ISCM II AND EPMESC XII, PTS 1 AND 2
LA English
DT Proceedings Paper
DE Molecular Dynamics; Gas Separation; Carbon Nanotubes
ID MASS-TRANSPORT; MEMBRANES; FLOW; GRAPHITE; NITROGEN
AB A kink model for gas separation is presented. Transport of pure
nitrogen, oxygen and their mixture in single walled carbon nanotubes
(SWCNTs) with a kink formed by bending is studied using molecular
dynamics simulations. The results show that a kinked SWCNT results in
transport resistance to nitrogen while allowing oxygen to pass even
though the two gases have very similar molecular sizes. The
permeability decreases while the selectivity increases with increasing
the bending angle of SWCNTs. The tradeoff between permeability and
selectivity is evaluated by linear weighting method to attain an
optimum bending angle for gas separation. It is also found that the
kink model can be used to improve the permeability by changing the
diameter of the SWCNTs while keeping a high selectivity in the gas
separation process. Both the permeability and purity of oxygen increase
with increasing the gas pressure. Interestingly, it is very convenient
to obtain the required purity and permeability of the oxygen by
adjusting the bending angle of SWCNTs.
C1 [Zhang, Z. Q.; Zhang, H. W.] Dalian Univ Technol, Fac Vehicle Engn & Mech, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China.
RP Zhang, ZQ, Dalian Univ Technol, Fac Vehicle Engn & Mech, Dept Engn
Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R
China.
EM zhanghw@dlut.edu.cn
CR ARORA G, 2004, LANGMUIR, V20, P6268, DOI 10.1021/la036432f
ARORA G, 2005, J CHEM PHYS, V123, ARTN 044705
ARORA G, 2006, J CHEM PHYS, V124, ARTN 084702
ARORA G, 2007, NANO LETT, V7, P565, DOI 10.1021/nl062201s
BOJAN MJ, 1987, LANGMUIR, V3, P1123
BOJAN MJ, 1987, LANGMUIR, V3, P116
GRUJICIC M, 2005, APPL SURF SCI, V246, P149, DOI
10.1016/j.apsusc.2004.11.007
HOLT JK, 2006, SCIENCE, V312, P1034, DOI 10.1126/science.1126298
HUMMER G, 2001, NATURE, V414, P188
KLEIN ML, 1980, PHYS REV B, V21, P5785
LIDE DR, 2000, CRC HDB CHEM PHYS
LONG RQ, 2001, J AM CHEM SOC, V123, P2058
MAJUMDER M, 2005, NATURE, V438, P44, DOI 10.1038/43844a
MILLER SA, 2001, J AM CHEM SOC, V123, P12335
MURTHY CS, 1980, MOL PHYS, V41, P1387
POWER TD, 2002, J AM CHEM SOC, V124, P1858
REN ZF, 1998, SCIENCE, V282, P1105
SINGH A, 1996, IND ENG CHEM RES, V35, P1231
SKOULIDAS AI, 2002, PHYS REV LETT, V89, ARTN 185901
SUN L, 2000, J AM CHEM SOC, V122, P12340, DOI 10.1021/ja002429w
WANG QY, 1999, PHYS REV LETT, V82, P956
ZHANG ZQ, 2008, PHYS REV B, V78, ARTN 035439
NR 22
TC 0
PU AMER INST PHYSICS; 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY
11747-4501 USA
SN 0094-243X
VL 1233
BP 770
EP 775
GA BRL16
UT ISI:000283003800132
ER

EF

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ISI Web of Knowledge Alert - Majumder M

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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)
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*Order Full Text [ ]

Title:
Gas Separation by Kinked Single-Walled Carbon Nanotubes

Authors:
Zhang, ZQ; Zhang, HW

Author Full Names:
Zhang, Z. Q.; Zhang, H. W.

Source:
ISCM II AND EPMESC XII, PTS 1 AND 2 1233: 770-775 2010

Language:
English

Document Type:
Proceedings Paper

Author Keywords:
Molecular Dynamics; Gas Separation; Carbon Nanotubes

KeyWords Plus:
MASS-TRANSPORT; MEMBRANES; FLOW; GRAPHITE; NITROGEN

Abstract:
A kink model for gas separation is presented. Transport of pure nitrogen, oxygen and their mixture in single walled carbon nanotubes (SWCNTs) with a kink formed by bending is studied using molecular dynamics simulations. The results show that a kinked SWCNT results in transport resistance to nitrogen while allowing oxygen to pass even though the two gases have very similar molecular sizes. The permeability decreases while the selectivity increases with increasing the bending angle of SWCNTs. The tradeoff between permeability and selectivity is evaluated by linear weighting method to attain an optimum bending angle for gas separation. It is also found that the kink model can be used to improve the permeability by changing the diameter of the SWCNTs while keeping a high selectivity in the gas separation process. Both the permeability and purity of oxygen increase with increasing the gas pressure. Interestingly, it is very convenient to obtain the required purity and permeabilit
y of the oxygen by adjusting the bending angle of SWCNTs.

Reprint Address:
Zhang, ZQ, Dalian Univ Technol, Fac Vehicle Engn & Mech, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China.

Research Institution addresses:
[Zhang, Z. Q.; Zhang, H. W.] Dalian Univ Technol, Fac Vehicle Engn & Mech, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China

E-mail Address:
zhanghw@dlut.edu.cn

Cited References:
ARORA G, 2004, LANGMUIR, V20, P6268, DOI 10.1021/la036432f.
ARORA G, 2005, J CHEM PHYS, V123, ARTN 044705.
ARORA G, 2006, J CHEM PHYS, V124, ARTN 084702.
ARORA G, 2007, NANO LETT, V7, P565, DOI 10.1021/nl062201s.
BOJAN MJ, 1987, LANGMUIR, V3, P1123.
BOJAN MJ, 1987, LANGMUIR, V3, P116.
GRUJICIC M, 2005, APPL SURF SCI, V246, P149, DOI 10.1016/j.apsusc.2004.11.007.
HOLT JK, 2006, SCIENCE, V312, P1034, DOI 10.1126/science.1126298.
HUMMER G, 2001, NATURE, V414, P188.
KLEIN ML, 1980, PHYS REV B, V21, P5785.
LIDE DR, 2000, CRC HDB CHEM PHYS.
LONG RQ, 2001, J AM CHEM SOC, V123, P2058.
MAJUMDER M, 2005, NATURE, V438, P44, DOI 10.1038/43844a.
MILLER SA, 2001, J AM CHEM SOC, V123, P12335.
MURTHY CS, 1980, MOL PHYS, V41, P1387.
POWER TD, 2002, J AM CHEM SOC, V124, P1858.
REN ZF, 1998, SCIENCE, V282, P1105.
SINGH A, 1996, IND ENG CHEM RES, V35, P1231.
SKOULIDAS AI, 2002, PHYS REV LETT, V89, ARTN 185901.
SUN L, 2000, J AM CHEM SOC, V122, P12340, DOI 10.1021/ja002429w.
WANG QY, 1999, PHYS REV LETT, V82, P956.
ZHANG ZQ, 2008, PHYS REV B, V78, ARTN 035439.

Cited Reference Count:
22

Times Cited:
0

Publisher:
AMER INST PHYSICS; 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA

ISSN:
0094-243X

IDS Number:
BRL16

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