NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2016, 7 (4), P. 637–642
ZnS nanoparticles decorated graphene nanoplatelets as immobilisation matrix for glucose biosensor
G. Suganthi – Bio products laboratory, Central Leather Research Institute, Adyar, Chennai 600 036, Tamil Nadu, India; Shugankarthick@gmail.com
T. Arockiadoss – Department of physics, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India; arockiados@gmail.com
T. S. Uma – Bio products laboratory, Central Leather Research Institute, Adyar, Chennai 600 036, Tamil Nadu, India; tsuma@clri.res.in
A glucose biosensor has been fabricated by using ZnS nanoparticle-substituted graphene nanosheets. Thermally exfoliated graphene nanosheets act as a suitable support for the deposition of ZnS nanoparticles. In this work, graphene was functionalized with ZnS nanoparticles by a simple chemical reduction method. The synthesized G/ZnS nanoparticles have been characterized using X-ray diffractometry (XRD), Transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), FT-IR techniques. Aditionally, the Glucose biosensor has been constructed by drop-casting G/ZnS over a conductive carbon support followed by the deposition of Glucose oxidase (GOx) over a G/ZnS electrode. The performance of the biosensor was investigated by an electrochemical method. The resultant bioelectrode retains its biocatalytic activity and offers fast, highly-sensitive glucose quantification and a shelf-life of about 10 weeks under refrigerated conditions.
Keywords: Glucose oxidase, ZnS nanoparticles, graphene, enzymatic, biosensor.
PACS 87
DOI 10.17586/2220-8054-2016-7-4-637-642
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