Wettability Control and Flow Regulation Using a Nanostructure-Embedded Surface
Abbreviated Journal Title
J. Nanosci. Nanotechnol.
Wetting; Layer-by-Layer; Thermoresponsive Polymer; Valve; Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials; Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
This work addresses the synthesis, integration and characterization of a nanostructure-embedded thermoresponsive surface for flow regulation. In order to create a hierarchic structure which consists of microscale texture and nanoscale sub-texture, hybrid multilayers consisting of poly(allylamine hydrochloride) (PAH), poly(acrylic acid) (PAA) and colloidal silica nanoparticles (average diameter = 22 nm and 7 nm) were used. Based on the electrostatic interactions between the polyelectrolytes and nanoparticles, a layer-by-layer deposition technique in combination with photolithography was employed to obtain a localized, conformally-coated patch in a microchannel. Grafted with the thermoresponsive polymer, poly(N-isopropylacrylamide) (PNIPAAm), wettability of the surface could be tuned upon heating or cooling. The measurement of differential pressure at various stages of device verified the working conditions of the nanostructure-embedded surface for regulating a capillary flow in the microchannel.
Journal of Nanoscience and Nanotechnology
Article; Proceedings Paper
"Wettability Control and Flow Regulation Using a Nanostructure-Embedded Surface" (2011). Faculty Bibliography 2010s. 1981.