Please use this identifier to cite or link to this item:
Title: Oligopeptide-modified silicon nanowire arrays as multichannel metal ion sensors
Authors: Bi, X. 
Agarwal, A.
Yang, K.-L. 
Keywords: Metal ion sensor
Silicon nanowire
Issue Date: 15-Jul-2009
Citation: Bi, X., Agarwal, A., Yang, K.-L. (2009-07-15). Oligopeptide-modified silicon nanowire arrays as multichannel metal ion sensors. Biosensors and Bioelectronics 24 (11) : 3248-3251. ScholarBank@NUS Repository.
Abstract: Semiconducting nanowires have the potential to function as highly sensitive and selective sensors for label-free detection of biological and chemical species. In this paper, we describe the preparation and applications of oligopeptide-modified single crystal silicon nanowire (SiNW) arrays as multichannel metal ion sensors. Because these SiNW arrays were fabricated by using a "top-down" process, a very high density of individually addressable SiNW (180 SiNWs grouped into 36 clusters) can be manufactured on a single chip. Furthermore, after two different SiNW clusters are modified with Pb2+-selective and Cu2+-selective oligopeptide, respectively, concentrations of Pb2+ and Cu2+ in aqueous solutions can be detected simultaneously and selectively in two different channels. By using the SiNW arrays, we successfully achieved a detection limit of 1 nM for Pb2+ and 10 nM for Cu2+, respectively. These results demonstrate the potential utility of oligopeptide-modified SiNW arrays for highly sensitive and selective chemical and biological sensing applications. © 2009 Elsevier B.V. All rights reserved.
Source Title: Biosensors and Bioelectronics
ISSN: 09565663
DOI: 10.1016/j.bios.2009.04.007
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Dec 2, 2021


checked on Dec 2, 2021

Page view(s)

checked on Dec 2, 2021

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.