bullet Sensors & Transducers Journal

    (ISSN 1726- 5479)

205.767

2008 e-Impact Factor

25 Top Downloaded Articles

Journal Subscription 2010/2011

Editorial Calendar 2010

Editorial Calendar 2011

Submit an Article

Editorial Board

Current Issue

Sensors & Transducers journal's cover

Sensors & Transducers Journal 2009

Sensors & Transducers Journal 2008

Sensors & Transducers Journal 2007

2000-2002 S&T e-Digest Contents

2003 S&T e-Digest Contents

2004 S&T e-Digest Contents

2005 S&T e-Digest Contents

2006 S&T e-Digest Contents

 

Best Articles 2009

 

 

 

Vol. 122, Issue 11, November 2010, pp.85-101

 

Bullet

Catechol Biosensor Based on Gold Nanoparticle Modified Tetrabutylammoniumtetrafluoroborate
Doped Polythiophene Films

 

a*Suman SINGH, aS. Praveen KUMAR, bD. V. S. JAIN, a*M. L. SINGLA

a Central Scientific Instruments Organization (CSIR), Sector 30-C, Chandigarh, India

b Panjab University, Chandigarh, India

*Email: sumansingh01@gmail.com

 

 

Received: 17 August 2010   /Accepted: 18 November 2010   /Published: 30 November 2010

 

Abstract: Tetra butyl ammonium tetra fluoroborate (TBATFB) doped polythiophene films have been polymerized galvano-statically which were then modified with soium citrate capped gold nanoparticles (AuNPs) using dip coating method. Catechol biosensor was fabricated using laccase enzyme. ITO/Pth and ITO/Pth/AuNPs/Lac bioelectrodes were characterized using scanning electron microscopy (SEM), UV-Visible spectroscopy and electrochemical techniques. Absorbance for ITO/Pth/AuNPs/Lac bioelectrodes was monitored at 410 nm as a function of catechol concentration and pH. Cyclic voltammetric studies of ITO/Pth electrodes showed quasi-reversible behavior when recorded in sodium acetate buffer, which later turned into reversible behavior on modification with gold nanoparticles. ITO/Pth/AuNPs/Lac bioelectrodes showed maximum oxidation potential for enzymatic reaction of catechol at -0.2 V, with linear range upto 0.8 mM and regression coefficient (R2) of 0.988. Sensitivity and Km values were found to be 3.7 x 10-5 mA/mM and 0.22 mM respectively, with response time of about 6-8 s.

 

Keywords: Polythiophene, Gold nanoparticles (AuNPs), Catechol, Laccase.

 

Acrobat reader logo Click <here> or title of paper to download the full pages article (2.04 Mb)

 

 

Read more about Nanosensors and Biosensors

 

 

 

 

 


1999 - 2010 Copyright , International Frequency Sensor Association (IFSA). All Rights Reserved.


Home - News - Links - Archives - Tools - Standardization - Patents - Marketplace - Projects - Wish List - Subscribe - Search - Membership - Submit Press Release - Twitter

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Sensor Jobs - e-Shop - Site Map - Video