Friday, May 8, 2009

ISI Web of Knowledge Alert - Maibaum, L

ISI Web of Knowledge Citation Alert

Cited Article: Maibaum, L. A coarse-grained model of water confined in a hydrophobic tube
Alert Expires: 22 OCT 2009
Number of Citing Articles: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Molecular simulation of the nanoscale water confined between an atomic force microscope tip and a surface

Authors:
Choi, HJ; Kim, JY; Hong, SD; Ha, MY; Jang, J

Author Full Names:
Choi, H. J.; Kim, J. Y.; Hong, S. D.; Ha, M. Y.; Jang, J.

Source:
MOLECULAR SIMULATION 35 (6): 466-472 2009

Language:
English

Document Type:
Proceedings Paper

Author Keywords:
water meniscus; capillary force; AFM; molecular dynamics simulation

KeyWords Plus:
CAPILLARY FORCE; ADHESION FORCES; HUMID AIR; SYSTEMS; HYSTERESIS; ROUGHNESS; DYNAMICS; FIELD

Abstract:
Under ambient humidity, water condenses as a nanometre meniscus between an atomic force microscope (AFM) tip and a surface, giving rise to a strong capillary force on the tip. To examine the molecular features of the meniscus, we performed an all-atom molecular dynamics simulation. By varying the tip-surface distance, we have simulated the formation, thinning and snap-off of the water meniscus. The meniscus is several nanometres wide and substantially fluctuates in its periphery when its neck is narrow. The density profile of the meniscus shows that its periphery is not sharp but has a fuzzy boundary whose thickness ranges from 0.4 to 0.9 nm. We obtained the neck radius of the meniscus and the radius of curvature of its periphery. Due to the sharp asperity of the AFM tip, these two structural parameters are comparable in size, in contrast to the case of a macroscopic tip, where the neck radius is much greater. We found that the meniscus periphery is often far from a circle i!
n shape. With the structural parameters of the meniscus, we calculated the capillary force by using the Laplace-Kelvin equation. Our calculation reproduces the typical behaviour of the force-distance curve in the AFM experiment.

Reprint Address:
Jang, J, Pusan Natl Univ, Dept Nanomat Engn, Miryang, South Korea.

Research Institution addresses:
[Jang, J.] Pusan Natl Univ, Dept Nanomat Engn, Miryang, South Korea; [Choi, H. J.; Kim, J. Y.; Hong, S. D.; Ha, M. Y.] Pusan Natl Univ, Sch Mech Engn, Pusan, South Korea

E-mail Address:
jkjang@pusan.ac.kr

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Cited Reference Count:
29

Times Cited:
0

Publisher:
TAYLOR & FRANCIS LTD; 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND

Subject Category:
Chemistry, Physical; Physics, Atomic, Molecular & Chemical

ISSN:
0892-7022

DOI:
10.1080/08927020802635129

IDS Number:
435UL

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