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Friday, November 5, 2010

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Cited Article: Song, X. A comparative study on poiseuille flow of simple fluids through cylindrical and slit-like nanochannels
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: Ghosh, S. Carbon nanotube flow sensors
Alert Expires: 09 NOV 2010
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b

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: 3 new records this week (3 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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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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Cited Reference Count:
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

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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 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: 09 NOV 2010
Number of Citing Articles: 4 new records this week (4 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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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:
ADVINCULA RC, 2004, POLYM BRUSHES SYNTHE.
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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

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

*Record 2 of 4.
*View Full Record: http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;KeyUT=000283222200160
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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

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

*Record 3 of 4.
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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

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

*Record 4 of 4.
*View Full Record: http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;KeyUT=000282916200060
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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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