One-pot Synthesis of MPA Capped CdTe Quantum Dots for Non-Enzymatic Hydrogen Peroxide Biosensor Application

Authors

  • G. Sindhu  School of Physics, Bharathidasan University, Tiruchirappalli-620024, India
  • M. Manikandan  School of Physics, Bharathidasan University, Tiruchirappalli-620024, India
  • S. Dhanuskodi  Department of Physics, St. Joseph’s College (Autonomous), Tiruchirappalli-620002, India
  • M.M. Armstrong Arasu  Department of Physics, St. Joseph’s College (Autonomous), Tiruchirappalli-620002, India

Keywords:

CdTe Quantum Dots, Hydrogen peroxide, Sensitivity, Selectivity, Limit of Detection.

Abstract

Mercaptopropionic Acid (MPA) capped CdTe QDs with crystallite size is 0.8 nm were successfully synthesized in aqueous medium by reflux method. The HRSEM demonstrates the spherical shape with varying sizes in the nanometer scales. From the electrochemical studies, the prepared QDs improve the electron transfer between electrode and H2O2. The sensor exhibits a linear range from 0.67-8.04 µM with a sensitivity of 0.2833 mA mM-1cm-2 with a linear coefficient of 0.9877. The sensor shows detection limit of 6.7 µM with a rapid amperometric response time of 5s and possesses a good reproducibility. It shows the selectivity toward H2O2 and interference free phenomenon for other electro active species like oxalic acid and ascorbic acid. MPA capped CdTe QDs sensor was used in rat and human serum samples and cell labeling.

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International Journal of Scientific Research in Science and Technology

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Published

2017-12-15

Issue

Volume 3, Issue 11, November-December-2017

Section

Research Articles

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How to Cite

[1]
G. Sindhu, M. Manikandan, S. Dhanuskodi, M.M. Armstrong Arasu, " One-pot Synthesis of MPA Capped CdTe Quantum Dots for Non-Enzymatic Hydrogen Peroxide Biosensor Application, International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011, Volume 3, Issue 11, pp.129-134, November-December-2017.