Cart (Loading....) | Create Account
Close category search window
 

Interdigitated Electrode-Less High-Performance Macroporous Silicon Structure as Impedance Biosensor for Bacteria Detection

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Das, R.D. ; Dept. of Electron. & Telecommun. Eng., Bengal Eng. & Sci. Univ., Shibpur, India ; Dey, A. ; Das, S. ; RoyChaudhuri, C.

In this paper, an interdigitated electrode-less, high performance macroporous silicon-based impedance biosensor has been reported first time for the detection of E.ColiO157. Macroporous silicon of three different pore thickness of around 3, 8, and 12 μm and 55% porosity have been fabricated on a 10-20 Ω-cm wafer using hydrofluoric acid (HF) and dimethyl sulfoxide (DMSO). The samples are next thermally oxidized for partial oxidation of silicon crystallites followed by optimized silanization and antibody immobilization. Two simple gold coated aluminium electrodes of 2 mm by 1 mm dimensions and 1 mm spacing have been fabricated similar to our previous report. It has been observed that the macroporous silicon with 8 μm thickness exhibits the maximum sensitivity of 30% corresponding to 104 CFU/ml which is twice compared to the earlier report on macroporous silicon and also it is higher than most of the other reports using IDE structures. The optimized sensor has been found to be reproducible, specific and capable of detecting down to 103 CFU/ml with a simple structure. A distributed transmission line model has been developed for macroporous silicon in presence of solution to explain the nature of variation of sensitivity with thickness from the current line confinement effects.

Published in:

Sensors Journal, IEEE  (Volume:11 ,  Issue: 5 )

Date of Publication:

May 2011

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.