Zirconia (ZrO2) grafted multiwalled carbon nanotubes (CNTs) (crystallite size of ZrO2 ∼ 28.63 nm), obtained via isothermal hydrolysis of zirconium oxychloride in presence of CNT, have been electrophoretically deposited onto indium-tin-oxide (ITO) coated glass plate. High resolution electron microscopic investigations reveal assemblage of the ZrO2 nanostructure inside and around CNT cavities. Electrochemical impedance spectroscopic studies indicate ∼3.5 fold enhancement in charge transfer behaviour of NanoZrO2-CNT/ITO electrode compared to that of NanoZrO2/ITO electrode. Considering the synergy between biocompatible ZrO2 and electrochemically superior CNT, this nanobiocomposite has been explored to develop an impedimetric nucleic acid biosensor for M. Tuberculosis detection.
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3 October 2011
Research Article|
October 06 2011
Zirconia grafted carbon nanotubes based biosensor for M. Tuberculosis detection
Maumita Das;
Maumita Das
1
Department of Science and Technology Centre on Biomolecular Electronics, National Physical Laboratory, CSIR
, Dr. K. S. Krishnan Marg, New Delhi 110012, India
2Department of Chemistry,
University of Delhi
, Delhi 110007, India
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Chetna Dhand;
Chetna Dhand
1
Department of Science and Technology Centre on Biomolecular Electronics, National Physical Laboratory, CSIR
, Dr. K. S. Krishnan Marg, New Delhi 110012, India
2Department of Chemistry,
University of Delhi
, Delhi 110007, India
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G. Sumana;
G. Sumana
1
Department of Science and Technology Centre on Biomolecular Electronics, National Physical Laboratory, CSIR
, Dr. K. S. Krishnan Marg, New Delhi 110012, India
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A. K. Srivastava;
A. K. Srivastava
1
Department of Science and Technology Centre on Biomolecular Electronics, National Physical Laboratory, CSIR
, Dr. K. S. Krishnan Marg, New Delhi 110012, India
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N. Vijayan;
N. Vijayan
1
Department of Science and Technology Centre on Biomolecular Electronics, National Physical Laboratory, CSIR
, Dr. K. S. Krishnan Marg, New Delhi 110012, India
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R. Nagarajan;
R. Nagarajan
2Department of Chemistry,
University of Delhi
, Delhi 110007, India
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B. D. Malhotra
B. D. Malhotra
a)
1
Department of Science and Technology Centre on Biomolecular Electronics, National Physical Laboratory, CSIR
, Dr. K. S. Krishnan Marg, New Delhi 110012, India
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a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]. Telephone: +91-11-45609152. Fax: 45609312.
Appl. Phys. Lett. 99, 143702 (2011)
Article history
Received:
August 26 2011
Accepted:
September 05 2011
Citation
Maumita Das, Chetna Dhand, G. Sumana, A. K. Srivastava, N. Vijayan, R. Nagarajan, B. D. Malhotra; Zirconia grafted carbon nanotubes based biosensor for M. Tuberculosis detection. Appl. Phys. Lett. 3 October 2011; 99 (14): 143702. https://doi.org/10.1063/1.3645618
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