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Low Temperature Fabrication and Surface Modification Methods for Fused Silica Micro- and Nanochannels

Published online by Cambridge University Press:  09 January 2014

Sumita Pennathur  and
Pete Crisalli
Sumita Pennathur
Affiliation:
Mechanical Engineering Department, University of California, Santa Barbara Santa Barbara, CA 93106 U.S.A.
Pete Crisalli
Affiliation:
Mechanical Engineering Department, University of California, Santa Barbara Santa Barbara, CA 93106 U.S.A.
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Abstract

Electrokinetic based micro- and nanofluidic technologies provide revolutionary opportunities to separate, identify and analyze biomolecular species. Key to fully harnessing the power of such systems is the development of a robust method for integrated electrodes as well as a thorough understanding of the influence of the electrokinetic surface properties with and without different surface modifications. In this work, we demonstrate a surface micromachined fabrication approach for integrated addressable metal electrodes within centimeter-long nanofluidic channels using a low-temperature, xenon diflouride dry-release method for novel biosensing applications, as well as recent results from a joint theoretical and experimental study of electrokinetic surface properties in nano- and microfluidic channels fabricated with fused silica. The main contribution of this fabrication process involves the addition of addressable electrodes to a novel dry-release channel fabrication method, produced at <300°C, to be used in nanofluidic electronic sensing of biomolecules. Finally, we also show a novel method with which to coat our channels with silane based chemistries. Certain modifications are observed to show improved resistance to non-specific adhesion of both small molecules and proteins, indicating their further use as compatible surfaces in micro- and nanofluidic applications.

Keywords

nanoscalesurface chemistrymicroelectro-mechanical (MEMS)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1659: Symposium SS/XX – Micro- and Nanoscale Systems – Novel Materials, Structures and Devices , 2014 , pp. 15 - 26
Copyright
Copyright © Materials Research Society 2014 

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