Recent development in chitosan-based electrochemical sensors and its sensing application.

During the last few decades, there has been evident growth in the development and fabrication of nano structured materials due to their wide application for different fields of material science and engineering. Among all these materials, natural polymer-based hydrogels such as polysaccharides, proteins, lipids etc. are gaining significant attention in the field of nanotechnology. Among them Chitosan hydrogels are widely used. These are cross-linked hydrophilic polymers which facilitate the uptake of significant quantity of water without being dissolved in water. They are hydrophilic in nature antimicrobial mainly need for fabrication of novel biomaterial These are chemically and physically firm, soft, stretchy polymeric network, reusable and multi-functional in nature. Chitosan has extensive properties including electrical, photo thermal characteristics, catalysis, anti-microbial characteristics, drug degradation, pollutants removal; bio-sensing etc. make it ultimate for "smart" nanostructure material. Recently, advance in the applications of Chitosan has made it an appreciable research material among the researchers. In this review we will focus on properties and applications of Chitosan as smart material in sensor configurations in various fields like clinical and environmental analysis.