Composite and Nanocomposite Thin-film Structures Based on Chitosan Succinamide

Abstract

Currently, developing composite and nanocomposite materials based on natural polymers is attracting the growing attention of scientists. In particular, chitosan succinate, a modified biopolymer, has good biocompatibility, biodegradability, and electrical conductivity, allowing it to be used as a functional material for creating various electronic devices, including sensors for use in medicine and pharmaceuticals. Composite sensors based on chitosan derivatives have found application for the recognition and determination of enantiomers of tryptophan, tyrosine, naproxen, and propranolol in human urine and blood plasma in tablet forms of drugs without a preliminary active substance. This article discusses the studies on composite and nanocomposite thin-film structures based on chitosan succinamide obtained using various fillers, such as graphene oxide, singlewalled carbon nanotubes, and carbon adsorbents. The studies used cyclic voltammetry, electrochemical impedance spectroscopy, and atomic force microscopy. The results created field-effect transistors based on the films in question as the transport layer. The mobility of charge carriers was estimated, and the following values were obtained: μ(SCTS) = 0.173cm2 /V·s; μ(SCTS-GO) = 0.509 cm2 /V·s; μ(SCTS-CP) = 0.269 cm2 /V·s; μ(SCTS-CB) = 0.351cm2 /V·s; μ(SCTS-SWCNT) = 0.713 cm2 /V·s.