Development of highly sensitive optical sensor from carbon nanotube-alumina nanocomposite free-standing films: CNTs loading dependence sensor performance Analysis

摘要

Highlights?A promising facile and economic technique to develop MWCNTs/Alumina composite film.?Optical sensors prepared from free-standing films for varying MWCNTs contents.?FESEM analysis corroborates homogeneous dispersal of MWCNTs in host matrix.?Fast response, high sensitivity andexcellent repeatability in Vis-NIR region.?The technique holds potential for commercial scale production.AbstractWe report a highly sensitive optical sensor based on free-standing thin films derived from multi-walled carbon nanotubes (MWCNTs)-Alumina nanocomposite by Gel-cast technique. The sensing principle involves the change in the resistance/conductance of the fabricated nanocomposite film on interaction with the optical stimulus. The performance of the sensor strongly depends ? on loading and dispersion of MWCN