Orientation of a nanocylinder at a fluid interface

The Journal of Physical Chemistry. B
Eric P LewandowskiKathleen J Stebe

Abstract

A nanocylinder placed on a fluid interface can assume an end-on or side-on orientation, or it can immerse itself in the surrounding bulk phases. Any of these orientations can satisfy a mechanical force balance when the particle is small enough that gravitational effects are negligible. The orientation is determined by the surface energies of the fluid-solid, fluid-vapor, and vapor-solid surfaces. A comparison of the energy of each state allows phase diagrams to be defined in terms of the scaled aspect ratio x=2L/pir and the contact angle thetao, where L and r denote the nanocylinder length and radius, respectively. Line tension can also influence the orientations by changing the equilibrium contact angle theta and by increasing the energetic cost of the contact line. Phase diagrams accounting for positive line tensions Sigma are also constructed. These phase diagrams can be divided into two classes. In the first, over some range of x and Sigma, nanocylinders can be driven from side-on to end-on orientations with increasing Sigma. This transition terminates at a triple point where the side-on, end-on, and immersed energies are the same. In the second class, there is no triple point and, for a range of Sigma values, nanocylinders...Continue Reading

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Citations

Jul 16, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Thomas M RuhlandAxel H E Müller
Dec 21, 2011·Proceedings of the National Academy of Sciences of the United States of America·Marcello CavallaroKathleen J Stebe
Apr 12, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Stijn CoertjensLucio Isa
May 6, 2015·Proceedings of the National Academy of Sciences of the United States of America·Iris B LiuKathleen J Stebe
Oct 28, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Olasehinde OwoseniVijay T John
Sep 7, 2013·Advances in Colloid and Interface Science·Hiroki MatsubaraMakoto Aratono
Jan 22, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Bum Jun ParkDaeyeon Lee
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May 5, 2018·Soft Matter·Joseph A FerrarMichael J Solomon
Sep 19, 2007·Soft Matter·Alexander BökerThomas P Russell
Oct 31, 2014·Soft Matter·Bo PengArnout Imhof
Apr 29, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Jinbo HeThomas P Russell
Sep 3, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Eric P LewandowskiKathleen J Stebe
Sep 22, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Chen HaoPatrick T Spicer
Jun 22, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Hiroki Matsubara, Makoto Aratono
Oct 24, 2017·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Marlous KampAlfons van Blaaderen
Oct 26, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Narendra K Dewangan, Jacinta C Conrad

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