Influence of Surface State on Biochemical Sensing Using SiGe Nanowire

IEEE Transactions on Nanobioscience
Chiung-Hui Lai Shiu-Yu Wang

Abstract

Nanowires are extensively used to fabricate highly sensitive electrical sensors for detection of biological and chemical species. The hole mobility can be promoted by the increasing Ge fraction in SiGe, achieved by the oxidation-induced Ge condensation. However, oxidation increases the number of surface states, which brings the nonnegligible contribution in mobility degradation. In this work, 3-aminopropyltrimethoxysilane (APTMS) was used as a biochemical reagent to modify the surface of SiGe nanowires, then bonding to bio-linker, bis (3-sulfo-N-hydroxysuccinimide ester) sodium salt (BS3). Various methods have been proposed for increasing sensitivity of boron-doped SiGe nanowires, such as capping layer, surface treatment, and annealing temperature.

References

Sep 15, 2004·Proceedings of the National Academy of Sciences of the United States of America·Fernando PatolskyCharles M Lieber
Jul 21, 2006·The Journal of Physical Chemistry. B·Tobias Hanrath, Brian A Korgel
Apr 5, 2007·Analytical Chemistry·Zhiqiang GaoJinming Kong
Jul 20, 2007·Journal of the American Chemical Society·Paritosh MohantyBongsoo Kim

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Citations

Mar 7, 2021·Nanomaterials·Luca SeravalliMatteo Bosi

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