Nano Archive

Enhancing the hydrophobic effect in confined water nanodrops

Rao, Palla Venkata Gopala and Gandhi, K. S. and Ayappa, K. G. (2007) Enhancing the hydrophobic effect in confined water nanodrops. LANGMUIR, 23 (26). pp. 12795-12798.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/la7022902

Abstract

The distribution of hydrophobic solutes, such as methane, enclosed in a nanosized water droplet contained in a reverse micelle of diameter 2.82 nm is investigated using Monte Carlo simulations. The effect of the hydrophobic solute's atomic diameter on the solute-solute potential of mean force is also studied. The study reveals that confinement has a strong influence on the solute's tendency to associate. The potential of mean force exhibits only a single minimum, indicating that the contact pair is the only stable configuration between solutes. The solvent-separated pair that is universally observed for small solutes in bulk water is conspicuously absent. This enhanced hydrophobic effect is attributed to the lack of sufficient water to completely hydrate and stabilize the solvent-separated configurations. The study is expected to be important in understanding the role of hydrophobic forces during protein folding and nucleation under confinement.

Item Type:Article
Subjects:Analytical Science > Microscopy and probe methods
Material Science > Functional and hybrid materials
Physical Science > Nano objects
Material Science > Nanostructured materials
Material Science > Nanochemistry
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:3906
Deposited By:JNCASR
Deposited On:28 Jan 2009 06:57
Last Modified:28 Jan 2009 06:57

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