Nanoparticle in a Nanofluid Film Spreading on a Surface

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Original entry by Hyerim Hwang, AP 226, Spring 2012. not finished

Reference

Alex Nikolov, Kirti Kondiparty, and Darsh Wasan, "Nanoparticle Self-Structuring in a Nanofluid Film Spreading on a Solid Surface", Langmuir 2010 26(11), 7665-7670

Keywords

Thin film stability, Nanofluids, Disjoining pressure

Introduction

This paper investigates the complex mechanism involved in the solid-nanofluid-oil interactions by directly observing the phenomenon of nanoparticle self-layering due to confinement of nanoparticles in a thin film. This research also shows that the effect of film size on stability of nanolfluid films on a solid substrate.

Figure 1. An epitaxial film on a substrate. The film surface is perturbed into a wavy shape of wavelength and amplitude.
Figure 2. Two representative long-range interactions.
Figure 3. The top figure shows the qualitative shape of the function W(D) for Ag on GaAs, where the inflection point is marked by a small circle. The bottom figure shows the qualitative shape of the curvature.

Results

Discussion

In this paper, the experimental results of the nanoparticle self-ordering and stepwise thinning of the nanofluid film fromed between an oil drop and a solid surface are reported.