共 46 条
Iron oxide-chitosan hybrid nanobiocomposite based nucleic acid sensor for pyrethroid detection
被引:51
作者:
Kaushik, Ajeet
[1
,2
]
Solanki, Pratima R.
[2
]
Ansari, Anees A.
[2
]
Malhotra, Bansi D.
[2
]
Ahmad, Sharif
[1
]
机构:
[1] Jamia Millia Islamia, Dept Chem, Mat Res Lab, New Delhi 110025, India
[2] Natl Phys Lab, Ctr Biomol Elect, Dept Sci & Technol, New Delhi 110012, India
关键词:
Biosensor;
Biocatalysis;
Biopolymers;
Fe3O4;
nanoparticles;
Nanobiocomposite;
Electrochemical detection;
POLYVINYL SULFONATE FILM;
MODIFIED ELECTRODE;
COMPOSITE FILM;
IN-VITRO;
DNA;
NANOPARTICLES;
PERMETHRIN;
CYPERMETHRIN;
IMMOBILIZATION;
PESTICIDES;
D O I:
10.1016/j.bej.2009.04.021
中图分类号:
Q81 [生物工程学(生物技术)];
Q93 [微生物学];
学科分类号:
071005 ;
0836 ;
090102 ;
100705 ;
摘要:
Nucleic acid sensor has been fabricated via immobilization of single standard calf thymus deoxyribose nucleic acid (ssCT-DNA) onto chitosan (CH)-iron oxide (Fe3O4) nanoparticles based hybrid nanobiocomposite film deposited onto indium-tin-oxide (ITO) coated glass for pyrethroids [cypermehtim (CM) and permethrin (PM)] detection. The ssCT-DNA immobilized onto CH-Fe3O4 nanocomposite/ITO electrode has been characterized using scanning electron microscopy (SEM), UV-visible, Fourier transform infrared (FTIR) spectroscopy, electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV) techniques. This disposable ssCT-DNA/CH-Fe3O4 nanobiocomposite/ITO bioelectrode is stable for about two months under refrigerated conditions and can detect CM (0.0025-2 ppm) and PM (1-300 ppm) using DPV technique within 25s and 40s. respectively. (C) 2009 Published by Elsevier B.V.
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页码:132 / 140
页数:9
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