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Proceedings Article

Biosensor made with organic-inorganic hybrid composite: cellulose-tin oxide

[+] Author Affiliations
Suresha K. Mahadeva, Jyoti Nayak, Jaehwan Kim

Inha Univ. (Korea, Republic of)

Proc. SPIE 7980, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2011, 79800C (April 13, 2011); doi:10.1117/12.880315
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From Conference Volume 7980

  • Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2011
  • Vijay K. Varadan
  • San Diego, California, USA | March 06, 2011

abstract

Cellulose is the most abundant polymer found in nature, inexhaustible, low cost, easy processing, renewable, biodegradable and biocompatible. SnO2, is a known electrical conductor that is optically transparent in the visible spectrum with a wide band gap at room temperature. Thus, a hybrid nanocomposite of cellulose and SnO2can offer a unique property of cellulose combined with electrical properties of SnO2. These unique properties of cellulose- SnO2 hybrid nanocomposite can be capitalized to design flexible, biodegradable and low cost biosensors. Preparation and characterization of cellulose-SnO2 hybrid nanocomposite and its application as a flexible urea biosensor was demonstrated in this paper. It is observed sensitivity of cellulose-SnO2 hybrid nanocomposite urea biosensor was increased linearly with deposition time. As deposition time increased, amount of tin oxide deposited over cellulose surface also increases, so as to increase the amount of enzyme immobilization and attachment of analyte, attributes to large current output and high sensitivity of sensor. Increasing enzyme activity is observed, with increasing urea concentration. Experimental results suggested that, the proposed biosensor under study is suitable for urea detection below 50 mM.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Suresha K. Mahadeva ; Jyoti Nayak and Jaehwan Kim
"Biosensor made with organic-inorganic hybrid composite: cellulose-tin oxide", Proc. SPIE 7980, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2011, 79800C (April 13, 2011); doi:10.1117/12.880315; http://dx.doi.org/10.1117/12.880315


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