Wettability Control and Flow Regulation Using a Nanostructure-Embedded Surface

    Authors

    E. Y. Tafti; G. Londe; A. Chunder; L. Zhai; R. Kumar;H. J. Cho

    Comments

    Authors: contact us about adding a copy of your work at [email protected]

    Abbreviated Journal Title

    J. Nanosci. Nanotechnol.

    Keywords

    Wetting; Layer-by-Layer; Thermoresponsive Polymer; Valve; Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials; Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter

    Abstract

    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 Title

    Journal of Nanoscience and Nanotechnology

    Volume

    11

    Issue/Number

    2

    Publication Date

    1-1-2011

    Document Type

    Article; Proceedings Paper

    Language

    English

    First Page

    1417

    Last Page

    1420

    WOS Identifier

    WOS:000287167900085

    ISSN

    1533-4880

    Share

    COinS
     

    Accessibility Statement

    This item was created or digitized prior to April 24, 2027, or is a reproduction of legacy media created before that date. It is preserved in its original, unmodified state specifically for research, reference, or historical recordkeeping. In accordance with the ADA Title II Final Rule, the University Libraries provides accessible versions of archival materials upon request. To request an accommodation for this item, please submit an accessibility request form.