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Selective calcium ion detection with functionalized ZnO nanorods-extended gate MOSFET

Asif, M. H.; Nur, O.; Willander, M. and Danielsson, Bengt LU (2009) In Biosensors & Bioelectronics 24(11). p.3379-3382
Abstract
Zinc oxide nanorod-extended gate field effect transistor (MOSFET) is demonstrated for the detection of calcium (Ca2+) ions. ZnO nanorods were grown on the surface of a silver wire to produce an electrochemical nanosensor for selectively detecting Ca2+. The electrochemical response from the interaction between the ZnO nanorods and Ca2+ in an aqueous solution is coupled directly to the gate of a field effect transistor (MOSFET). The induced voltage change on the gate results in a measureable current response. In order to adapt the sensors for Ca2+ ions measurements in biological fluids with sufficient selectivity and stability, a plastic membrane coating containing ionophores was applied on the nanorods. The sensor exhibited a linear... (More)
Zinc oxide nanorod-extended gate field effect transistor (MOSFET) is demonstrated for the detection of calcium (Ca2+) ions. ZnO nanorods were grown on the surface of a silver wire to produce an electrochemical nanosensor for selectively detecting Ca2+. The electrochemical response from the interaction between the ZnO nanorods and Ca2+ in an aqueous solution is coupled directly to the gate of a field effect transistor (MOSFET). The induced voltage change on the gate results in a measureable current response. In order to adapt the sensors for Ca2+ ions measurements in biological fluids with sufficient selectivity and stability, a plastic membrane coating containing ionophores was applied on the nanorods. The sensor exhibited a linear response within the range of interest from 1 mu M to 1 mM. This work demonstrates a simple technique for sensitive detection of Ca2+ ions by efficient transfer of the chemical response directly to a standard electronic component producing a low impedance signal. (C) 2009 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
MOSFETs, ZnO nanowires, Calcium ions, Electrochemical sensors
in
Biosensors & Bioelectronics
volume
24
issue
11
pages
3379 - 3382
publisher
Elsevier
external identifiers
  • wos:000267577900033
  • scopus:67349179921
ISSN
1873-4235
DOI
10.1016/j.bios.2009.04.011
language
English
LU publication?
yes
id
52ea14da-16ca-43e3-ac9d-199c5bcbc4f4 (old id 1463433)
date added to LUP
2009-08-18 10:57:58
date last changed
2017-12-10 04:05:12
@article{52ea14da-16ca-43e3-ac9d-199c5bcbc4f4,
  abstract     = {Zinc oxide nanorod-extended gate field effect transistor (MOSFET) is demonstrated for the detection of calcium (Ca2+) ions. ZnO nanorods were grown on the surface of a silver wire to produce an electrochemical nanosensor for selectively detecting Ca2+. The electrochemical response from the interaction between the ZnO nanorods and Ca2+ in an aqueous solution is coupled directly to the gate of a field effect transistor (MOSFET). The induced voltage change on the gate results in a measureable current response. In order to adapt the sensors for Ca2+ ions measurements in biological fluids with sufficient selectivity and stability, a plastic membrane coating containing ionophores was applied on the nanorods. The sensor exhibited a linear response within the range of interest from 1 mu M to 1 mM. This work demonstrates a simple technique for sensitive detection of Ca2+ ions by efficient transfer of the chemical response directly to a standard electronic component producing a low impedance signal. (C) 2009 Elsevier B.V. All rights reserved.},
  author       = {Asif, M. H. and Nur, O. and Willander, M. and Danielsson, Bengt},
  issn         = {1873-4235},
  keyword      = {MOSFETs,ZnO nanowires,Calcium ions,Electrochemical sensors},
  language     = {eng},
  number       = {11},
  pages        = {3379--3382},
  publisher    = {Elsevier},
  series       = {Biosensors & Bioelectronics},
  title        = {Selective calcium ion detection with functionalized ZnO nanorods-extended gate MOSFET},
  url          = {http://dx.doi.org/10.1016/j.bios.2009.04.011},
  volume       = {24},
  year         = {2009},
}