Silk cocoon and rubber based gas sensors

Biological materials are going to be important in the realm of sensor research. The natural membranous materials e.g. garlic peel, onion peel, natural rubber surface, inner surface layer of cocoon etc. are very much sensitive towards different weather parameters, different environment threatening gases e.g. ammonia, sulphur dioxide etc. Exploiting this sensitivity such materials can be best used as sensors with their qualities like eco friendliness, no toxicity etc. In this present paper gas sensing characteristics of cocoon membrane as well as natural rubber surface had been investigated exploring their surface conductivity.