Difference between revisions of "Nanoparticle in a Nanofluid Film Spreading on a Surface"
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[[Image:wiki42.png|thumb|right|370px| Figure 2. (a) Film with dimple in the shape of a horseshoe and (b) filme with four particle layers. (c) With time, a film with three layers of particles.]] | [[Image:wiki42.png|thumb|right|370px| Figure 2. (a) Film with dimple in the shape of a horseshoe and (b) filme with four particle layers. (c) With time, a film with three layers of particles.]] | ||
− | [[Image:wiki43.png|thumb|left|350px| Figure 3. | + | [[Image:wiki43.png|thumb|left|350px| Figure 3. Photomicrograph depicting particle layering of silica suspension on a solid surface.]] |
− | [[Image:wiki44.png|thumb|left|350px| Figure 4. .]] | + | [[Image:wiki44.png|thumb|left|350px| Figure 4. (A) Photomicrograph depicting the nanofluid film and the adjoining meniscus. (B) Differential interferometry in reflected light. (C) Film-meniscus profile.]] |
− | [[Image:wiki45.png|thumb|left|350px| Figure 5. .]] | + | [[Image:wiki45.png|thumb|left|350px| Figure 5. Profile of the nanofluid film-meniscus region as probed by differential interferometric method.]] |
− | [[Image:wiki46.png|thumb|left|350px| Figure 6. .]] | + | [[Image:wiki46.png|thumb|left|350px| Figure 6. Film-meniscus microscopic contact angle versus film thickness and corresponding number of particle layers in a stratifying nanofluid film on a surface.]] |
− | [[Image:wiki47.png|thumb|left|350px| Figure 7. .]] | + | [[Image:wiki47.png|thumb|left|350px| Figure 7. Calculated oscillatory film structural energy isotherm as a function of film thickness scaled by the effective particle diameter.]] |
==[[Results]]== | ==[[Results]]== |
Revision as of 01:42, 20 April 2012
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.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. This also presents the measured contact angle of film-meniscus and thickness corresponding to the number of particle layers on a solid surface. These were used for getting the film energy due to the nanoparticle layering within the nanofluid film.