Polyaniline-CdS Quantum Dots Composite for Mediator Free Biosensing

  • Dhyani H
  • Dhand C
  • Malhotra B
N/ACitations
Citations of this article
31Readers
Mendeley users who have this article in their library.

Abstract

A novel route has been introduced to fabricate the composite of polyaniline (PANI) and cadmium sulphide quantum dots (CdS-QD) using electrochemical polymerization technique for mediator free biosensing. The synthesis process involves in situ formation of CdS quantum dots that provide template for eletro-polymerization of aniline resulting in nanostructured PANI-(CdS-QD) film deposition on the indium-tin-oxide (ITO) coated glass plate. Transmission electron microscopy and scanning electron microscopy have been used to reveal the formation of CdS-QD and morphological changes involved during incorporation of CdS in PANI matrix and while immobilization of cholesterol oxidase (ChOx). The UV–visible and FT-IR investigations show the formation of PANI-(CdS-QD) composite at the molecular level. This matrix has been utilized for the covalent immobilization of cholesterol oxidase to explore its application for cholesterol sensing. The results of the CV and EIS studies indicate enhanced electrochemical and charge transfer behaviour of the composite. The response studies, carried out using CV technique, reveal this ChOx/ PANI-(CdS-QD)/ITO bioelectrode to detect cholesterol in the concentration range of 50 to 500 mgdL -1 with good detection limit (47.8 mgdL -1) and low app m K value (0.82 mM).

Cite

CITATION STYLE

APA

Dhyani, H., Dhand, C., & Malhotra, B. D. (2012). Polyaniline-CdS Quantum Dots Composite for Mediator Free Biosensing. Journal of Biosensors & Bioelectronics, 03(01). https://doi.org/10.4172/2155-6210.1000112

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free