Srivastava, Rajesh K. and Srivastava, Saurabh and Narayanan, Tharangattu N. and Mahlotra, Bansi D. and Vajtai, Robert and Ajayan, Pulickel M. and Srivastava, Anchal (2012) Functionalized Multilayered Graphene Platform for Urea Sensor. ACS Nano, 6 (1). pp. 168-175. ISSN 1936-0851

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Abstract

Multilayered graphene (MLG) Is an interesting material for electrochemical sensing and biosensing because of its very large 2D electrical conductivity and large surface area. We propose a less toxic, reproducible, and easy method for producing functionalized multilayer graphene from multiwalled carbon nanotubes (MWCNTs) in mass scale using only concentrated H2SO4/HNO3. Electron microscopy results show the MLG formation, whereas FTIR and XPS data suggest its carboxylic and hydroxyl-functionalized nature. We utilize this functionalized MLG for the fabrication of a novel amperometric urea biosensor. This biosensor shows linearity of 10-100 mg dL(-1), sensitivity of 5.43 mu A mg(-1) dL cm(-2), lower detection limit of 3.9 mg dL(-1), and response time of 10 s. Our results suggest that MLG Is a promising material for electrochemical biosensing applications.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s American Chemical Society.
Subjects:	Chemistry Materials Science Nanoscience/ Nanotechnology Physical Chemistry/Chemical Physics
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	12 Mar 2020 10:48
Last Modified:	12 Mar 2020 10:48
URI:	http://npl.csircentral.net/id/eprint/3562

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