-, Rajesh and Das, Basanta K. and Srinives, Sira and Mulchandani, Ashok (2011) ZnS nanocrystals decorated single-walled carbon nanotube based chemiresistive label-free DNA sensor. Appllied Physics Letters, 98 (1). 013701-1-013701-3. ISSN 0003-6951

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Abstract

We fabricated ZnS nanocrystals decorated single-walled carbon nanotube (SWNT) based chemiresistive sensor for DNA. Since the charge transfer in the hybrid nanostructures is considered to be responsible for many of their unique properties, the role of ZnS nanocrystals toward its performance in DNA sensor was delineated. It was found that the free carboxyl groups surrounding the ZnS nanocrystals allowed large loading of single strand DNA (ssDNA) probe that provided an ease of hybridization with target complementary c-ssDNA resulting in large electron transfer to SWNT. Thus it provided a significant improvement in sensitivity toward c-ssDNA as compared to bare SWNT based DNA sensor.

Item Type: Article
Subjects: Physics
Divisions: UNSPECIFIED
Depositing User: Mr. Abhishek Yadav
Date Deposited: 21 Sep 2012 12:23
Last Modified: 21 Sep 2012 12:23
URI: http://npl.csircentral.net/id/eprint/580

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