Colloidal diffusion over a periodic energy landscape

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/104277

Title:	Colloidal diffusion over a periodic energy landscape
Authors:	黎璧賢;Ma, Xiao-guang;Lai, Pik-Yin;Tong, Penger
Contributors:	理學院物理學系
Keywords:	Colloids;Diffusion;Diffusion coefficient;Diffusion layers;Energy use;Forming;Histograms;Landscapes
Date:	2013-10-07
Issue Date:	2026-04-23 11:47:11 (UTC+8)
Publisher:	Royal Society of Chemistry
Abstract:	摘要： A two-layer colloidal system is developed for the study of colloidal diffusion over a two-dimensional periodic energy landscape. The energy landscape is made from the bottom layer of colloidal spheres forming a honey-comb crystalline pattern above a glass substrate. The corrugated surface of the bottom colloidal crystal provides a gravitational potential field for the diffusing particles in the top layer. The obtained population probability histogram P ( x , y ) of the diffusing particles is used to fully characterize the energy landscape U ( x , y ) via the Boltzmann distribution. The dynamical properties of the diffusing particle, such as its escape time t R and diffusion coefficient D are simultaneously measured from the particle's trajectories. The long-time diffusion coefficients D is found to be in good agreement with the theory for all colloidal samples studied. The experiment demonstrates the applications of this newly constructed colloidal energy landscape. Direct measurement of diffusion of monolayer colloidal particles over an energy landscape. 出版日期： 2013-01-01 出處： Soft matter, 2013-01, Vol.9 (37), p.8826-8836 識別號： ISSN: 1744-683X 識別號： EISSN: 1744-6848 識別號： DOI: 10.1039/c3sm51240a
Appears in Collections:	[Department of Physics] journal & Dissertation

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