bullet Sensors & Transducers Journal

    (ISSN: 2306-8515, e-ISSN 1726-5479)

0.705

2013 Global Impact Factor

205.767

2008 e-Impact Factor

25 Top Downloaded Articles

Best Selling Articles 2012

Journal Subscription

Editorial Calendar

Submit an Article

Editorial Board

Current Issue

S&T journal's cover

Sensors & Transducers Journal 2011

Sensors & Transducers Journal 2010

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 2011

 

 

 

Vol. 188, Issue 5, May 2015, pp. 26-32

 

Bullet

 

Sensitivity of Polyaniline-Zinc Oxide Composite to Humidity
 

1 R. K. Shukla, 1* Anchal Srivastava, 2 A. C. Pandey, 3 Kamakhya Prakash Misra and 1 Mamta Pandey

1 Department of Physics, University of Lucknow, Lucknow-226007, India
2 Nanotechnology Application Centre, University of Allahabad, Allahabad-211002, India
3 Department of Physics, School of Basic Sciences, Manipal University Jaipur, Jaipur-303007, India
* E-mail: asrivastava.lu@gmail.com

 

Received: 20 March 2015 /Accepted: 30 April 2015 /Published: 29 May 2015

Digital Sensors and Sensor Sysstems

 

Abstract: The paper presents synthesis, characterization and humidity sensing properties of polyaniline-zinc oxide composites. Polyaniline is prepared by oxidative polymerization of aniline under acidic condition and is mixed with different proportions of ZnO. These mixtures were pressed into pellets of organic-inorganic composite and then subjected to varying humidity. The pellets show change in their electrical resistance with change in relative humidity of the ambience. Critical dopant concentration leads to higher sensitivity to humidity and lower response and recovery times as compared to that for polyaniline reported earlier by the authors. The resistance falls from MW to kW as relative humidity increases from 20 to 90 RH %. The structural, morphological, FTIR and transmission studies of the composites have also been done. The XRD pattern of the composites at low metal composition is similar to polyaniline. Peaks corresponding to ZnO appear as the percentage doping increases. The FTIR spectra recorded in the range 4000-400 cm-1 show characteristic polyaniline bands between 750 1800 cm-1. SEM shows rods and pebble-like aggregates which are evenly distributed on the surface of the samples. The increased surface area is useful for adsorption of gases and vapours for their detection.

 

Keywords: Polyaniline, Humidity sensors, ZnO and organic-inorganic composites.

 

Acrobat reader logo Click <here> or title of paper to download the full pages article in pdf format

 

 

Subscribe the full-page Sensors & Transducers journal in print (paper) or pdf formats

(shipping cost by standard mail for paper version is included)

(25 % discount for IFSA Members)

 

 

 

Alternatively we accept a money transfer to our bank account. Please contact for details: sales@sensorsportal.com

 

 

Download <here> the Library Journal Recommendation Form

 

 

Read more about Humidity Sensors

 

 

 

 

 


1999 - 2015 Copyright , International Frequency Sensor Association (IFSA) Publishing, S.L. All Rights Reserved.


Home - News - Links - Archives - Tools - Voltage-to-Frequency Converters - Standardization - Patents - Marketplace - Projects - Wish List - e-Shop - Sensor Jobs - Membership - Videos - Publishing - Site Map - Subscribe - Search

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Submit Press Release - Submit White Paper - Testimonies - Twitter - Facebook - LinkedIn