Nanostructured surfaces for microfluidics and sensing applications.

Picraux, Samuel Thomas (Arizona State University) ; Piech, Marcin (United Technologies Corp.) ; Schneider, John F. ; Vail, Sean (Arizona State University) ; Hayes, Mark A. (Arizona State University) ; Garcia, Anthony A. ; Bell, Nelson Simmons ; Gust, D (Arizona

关键词: LIQUID FLOW;    MINIATURIZATION;    VISIBLE RADIATION;    AZO COMPOUNDS;    ISOMERIZATION;    SURFACE ENERGY;    SURFACE TENSION;    ULTRAVIOLET RADIATION Nanostructure materials.;    Systems on a chip.;    Nanotechnology.;   

DOI  :  10.2172/902205
RP-ID  :  SAND2006-7632
PID  :  OSTI ID: 902205
Others  :  TRN: US200717%%422

学科分类：化学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

The present work demonstrates the use of light to move liquids on a photoresponsive monolayer, providing a new method for delivering analyses in lab-on-chip environments for microfluidic systems. The light-driven motion of liquids was achieved on photoresponsive azobenzene modified surfaces. The surface energy components of azobenzene modified surfaces were calculated by Van Oss theory. The motion of the liquid was achieved by generation of a surface tension gradient by isomerization of azobenzene monolayers using UV and Visible light, thereby establishing a surface energy heterogeneity on the edge of the droplet. Contact angle measurements of various solvents were used to demonstrate the requirement for fluid motion.