Nanodiamond based sponges with entrapped enzyme: A novel electrochemical probe for hydrogen peroxide
Date
2013
Authors
Gopalan, A.I.
Komathi, S.
Anand, G.S.
Lee, K.P.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Biosensors and Bioelectronics, 2013; 46(8):136-141
Statement of Responsibility
Conference Name
Abstract
A "modular approach" has been demonstrated for the preparation of nanodiamond (ND) based sponges (NS) with entrapped enzyme (horseradish peroxidase, HRP) (ND-NS(HRP)) and utilization as an electrochemical probe for detection of hydrogen peroxide (H2O2). ND-NS comprises ND, porous poly(aniline)-poly(2-acrylamido 2-methyl propane sulfonic acid) (PANI-PAMPSA) network and entrapped HRP. Field emission scanning electron microscope image of ND-NS(HRP) reveals sponge like suprastructure comprising interconnected nanospheres with numerous openings/pinholes/cavities. The entrapped HRP in ND-NS exhibits effective direct electron transfer with an electron transfer rate constant of 1.85 s(-1). ND-NS(HRP) exhibited excellent bioelectrocatalytic reduction of hydrogen peroxide (H2O2) with a wide linear concentration range (1-45 mM), quick response (5 s), high sensitivity (129.6 mu AM(-1)) and low detection limit 59 mu M (S/N=3). (C) 2013 Elsevier B.V. All rights reserved.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
Copyright 2013 Elsevier