Issue 9, 2011
From the journal:

Soft Matter

Nanoparticle deposits near the contact line of pinned volatile droplets: size and shape revealed by atomic force microscopy

Alexandros Askounis,a   Daniel Orejon,a   Vasileios Koutsos,*a   Khellil Sefianea  and  Martin E. R. Shanahanb  

* Corresponding authors

a Institute for Materials and Processes, School of Engineering, The University of Edinburgh, King's Buildings, Mayfield Road, Edinburgh, UK
E-mail: vasileios.koutsos@ed.ac.uk
Fax: +44 (0)131-6506551
Tel: +44 (0)131-6508704

b Université Bordeaux 1, Institut de Mécanique et d'Ingénierie—Bordeaux (UMR 5295), Bâtiment A4,351 Cours de la Libération, Talence Cedex, France

Abstract

We report on the structure of ring deposits formed following the free evaporation of a sessile droplet containing nanoparticles. The nanostructure of the evaporatively formed deposits was revealed using atomic force microscopy (AFM). The structures were found to form a peak about 5 microns wide and one micron high and to exhibit a gentle slope gradually increasing in height in the direction of the three phase contact line motion. A theory is proposed to explain the formation and shape of these deposits. A comparison between the theory and the experiments shows a very good qualitative and quantitative agreement.

Graphical abstract: Nanoparticle deposits near the contact line of pinned volatile droplets: size and shape revealed by atomic force microscopy

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Article information

DOI
https://doi.org/10.1039/C1SM05241A
Article type
Communication
Submitted
13 Feb 2011
Accepted
15 Mar 2011
First published
31 Mar 2011

Soft Matter, 2011,7, 4152-4155

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Nanoparticle deposits near the contact line of pinned volatile droplets: size and shape revealed by atomic force microscopy

A. Askounis, D. Orejon, V. Koutsos, K. Sefiane and M. E. R. Shanahan, Soft Matter, 2011, 7, 4152 DOI: 10.1039/C1SM05241A

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