Surface osmotic flow and diffusiophoresis of gold nanoparticles trough solid fused silica.

Started: 2017

Co-authors: Hai Le The, Maren Muller, Katrin Kirchhoff, Michael Kappl, Jacco Snoeijer, Mathieu Odijk, Detlef Lohse, Albert van den Berg, Jan Eijkel.

Location: BIOS-lab-on-a-chip, University of Twente, Netherlands – Physics of Fluids, University of Twente, Netherlands

Flows at the surface of solids have described by surface diffusion or a melted nanometer-thick layer, driven by capillarity or an external applied pressure. Such a flow could be in theory driven by a gradient of surface concentration. Such a phenomenon is described theoretically, and compared with the experience of gold-nanoparticle engulfing in a wafer of fused silica at high temperature.