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.

Topics
Electronic devices, Crystal lattices, Crystal structure, Scanning electron microscopy, Biomaterials, Nanocomposites, Nanotubes, Transition metal oxides, Nucleic acids, Biosensors
1.
L.
 
Zhu
,
Y.
 
Sun
,
D. W.
 
Hess
, and
C. P.
 
Wong
,
Nano Lett.
 
6
,
243
(
2006
).
https://doi.org/10.1021/nl052183z
Crossref
Search ADS
PubMed
 
2.
R. H. M.
 
Chan
,
C. K. M.
 
Fung
, and
W. J.
 
Li
,
Nanotechnology
 
1
,
5
(
2004
).
3.
L.
 
Fu
,
Z.
 
Liu
,
Y.
 
Liu
,
B.
 
Han
,
J.
 
Wang
,
P.
 
Hu
,
L.
 
Cao
, and
D.
 
Zhu
,
Adv. Mater.
 
16
,
350
(
2004
).
https://doi.org/10.1002/adma.v16:4
4.
S. J.
 
Tans
,
A. R. M.
 
Verschueren
, and
C.
 
Dekker
,
Nature
 
393
,
49
(
1998
).
https://doi.org/10.1038/29954
Crossref
Search ADS
 
5.
A.
 
Javey
,
H.
 
Kim
,
M.
 
Brink
,
Q.
 
Wang
,
A.
 
Ural
,
J.
 
Guo
,
P.
 
McIntyre
,
P.
 
McEuen
,
M.
 
Lundstrom
, and
H.
 
Dai
,
Nature Mater.
 
1
,
241
(
2002
).
https://doi.org/10.1038/nmat769
Crossref
Search ADS
 
6.
R.
 
Martel
,
Nature Mater.
 
1
,
203
(
2002
).
https://doi.org/10.1038/nmat780
Crossref
Search ADS
 
7.
R. B.
 
Mathur
,
S.
 
Chatterjee
, and
B. P.
 
Singh
,
Compos. Sci. Technol.
 
68
,
1608
(
2008
).
https://doi.org/10.1016/j.compscitech.2008.02.020
Crossref
Search ADS
 
8.
M.
 
Das
,
G.
 
Sumana
,
R.
 
Nagarajan
, and
B. D.
 
Malhotra
,
Appl. Phys. Lett.
 
96
,
133703
(
2010
).
https://doi.org/10.1063/1.3293447
Crossref
Search ADS
 
9.
F.
 
Lupo
,
R.
 
Kamalakaran
,
C.
 
Scheu
,
N.
 
Grobert
, and
M.
 
Ruhle
,
Carbon
 
42
,
1995
(
2004
).
https://doi.org/10.1016/j.carbon.2004.03.037
Crossref
Search ADS
 
10.
N.
 
Prabhakar
,
H.
 
Singh
, and
B. D.
 
Malhotra
,
Electrochem.Commun.
 
10
,
821
(
2008
).
https://doi.org/10.1016/j.elecom.2008.03.006
Crossref
Search ADS
 
11.
N.
 
Prabhakar
,
K.
 
Arora
,
H.
 
Singh
, and
B. D.
 
Malhotra
,
J. Phys. Chem. B
 
112
,
4808
(
2008
).
https://doi.org/10.1021/jp711853q
Crossref
Search ADS
PubMed
 
12.
See supplementary material at http://dx.doi.org/10.1063/1.3645618 for the schematic of electrophoretic fabrication of NanoZrO2-CNT composite film onto ITO coated glass substrate. The XRD, FT-IR, and electrochemical response studies of NanoZrO2-CNT/ITO and DNA-NanoZrO2-CNT/ITO electrodes have also been investigated.
© 2011 American Institute of Physics.
2011
American Institute of Physics

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