Chemical sensors using peptide-functionalized conducting polymer nanojunction arrays

Alvaro Díaz Aguilar; Erica Forzani; Xiulan Li; Nongjian Tao; Larry A. Nagahara; Islamshah Amlani; Raymond Tsui

doi:10.1063/1.2128038

Chemical sensors using peptide-functionalized conducting polymer nanojunction arrays

Alvaro Díaz Aguilar, Erica Forzani, Xiulan Li, Nongjian Tao, Larry A. Nagahara, Islamshah Amlani, Raymond Tsui

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

We demonstrate a heavy metal-ion sensor for drinking water analysis using a conducting polymer nanojunction array. Each nanojunction is formed by bridging a pair of nanoelectrodes separated with a small gap (<60 nm) with electrodeposited peptide-modified polyanilines. The signal transduction mechanism of the sensor is based on the change in the nanojunction conductance as a result of polymer conformational changes induced by the metal-ion chelating peptide. The nanojunction sensor allows real-time detection of Cu2+ and Ni2+ at ppt range.

Original language	English (US)
Article number	193108
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	87
Issue number	19
DOIs	https://doi.org/10.1063/1.2128038
State	Published - Nov 7 2005

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Chemical sensors using peptide-functionalized conducting polymer nanojunction arrays",

abstract = "We demonstrate a heavy metal-ion sensor for drinking water analysis using a conducting polymer nanojunction array. Each nanojunction is formed by bridging a pair of nanoelectrodes separated with a small gap (<60 nm) with electrodeposited peptide-modified polyanilines. The signal transduction mechanism of the sensor is based on the change in the nanojunction conductance as a result of polymer conformational changes induced by the metal-ion chelating peptide. The nanojunction sensor allows real-time detection of Cu2+ and Ni2+ at ppt range.",

author = "Aguilar, {Alvaro D{\'i}az} and Erica Forzani and Xiulan Li and Nongjian Tao and Nagahara, {Larry A.} and Islamshah Amlani and Raymond Tsui",

note = "Funding Information: This work is supported by EPA (R82962301). The authors thank Daniel Brune and John Lopez for the synthesis and purification of peptide-modified anilines.",

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T1 - Chemical sensors using peptide-functionalized conducting polymer nanojunction arrays

AU - Aguilar, Alvaro Díaz

AU - Forzani, Erica

AU - Li, Xiulan

AU - Tao, Nongjian

AU - Nagahara, Larry A.

AU - Amlani, Islamshah

AU - Tsui, Raymond

N1 - Funding Information: This work is supported by EPA (R82962301). The authors thank Daniel Brune and John Lopez for the synthesis and purification of peptide-modified anilines.

PY - 2005/11/7

Y1 - 2005/11/7

N2 - We demonstrate a heavy metal-ion sensor for drinking water analysis using a conducting polymer nanojunction array. Each nanojunction is formed by bridging a pair of nanoelectrodes separated with a small gap (<60 nm) with electrodeposited peptide-modified polyanilines. The signal transduction mechanism of the sensor is based on the change in the nanojunction conductance as a result of polymer conformational changes induced by the metal-ion chelating peptide. The nanojunction sensor allows real-time detection of Cu2+ and Ni2+ at ppt range.

AB - We demonstrate a heavy metal-ion sensor for drinking water analysis using a conducting polymer nanojunction array. Each nanojunction is formed by bridging a pair of nanoelectrodes separated with a small gap (<60 nm) with electrodeposited peptide-modified polyanilines. The signal transduction mechanism of the sensor is based on the change in the nanojunction conductance as a result of polymer conformational changes induced by the metal-ion chelating peptide. The nanojunction sensor allows real-time detection of Cu2+ and Ni2+ at ppt range.

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Chemical sensors using peptide-functionalized conducting polymer nanojunction arrays

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