Immobilization of Bovine Serum Albumin Upon Multiwall Carbon Nanotube for High Speed Humidity Sensing Application

Abstract

We present a high-speed humidity sensor based on immobilization of bovine serum albumin upon multiwall carbon nanotube (IBC). A simple and versatile drop casting technique was employed to make the humidity sensor using novel material IBC at room temperature. IBC was synthesized using easy solution process technique. The working principle of the IBC humidity sensor depends upon the variation of output current or conductance with the exposure of different humidity level. Humidity sensing properties of our device is explained on the basis of charge transfer from water molecules to IBC and bovine serum albumin to multiwall carbon nanotube (MWCNT). Our sensor exhibits faster response time around 1.2 s and recovery time 1.5 s respectively.

Highly Efficient One-Step Protein Immobilization on Polymer Membranes Supported by Response Surface Methodology

“…, bilirubin, with multiple binding sites per BSA molecule ( Blauer and King, 1970 ), as well as for other substances such as drugs ( Bi et al, 2009 ), or toxic compounds ( Das et al, 2017 ). Hence, BSA has been immobilized and used as a functional biopolymer for various applications, e.g., 1) for the improvement of blood compatibility (hemocompatibility) in blood filtration systems ( Zhang et al, 2013 ); 2) for the reduction of hemolysis in blood storage devices ( Li et al, 2014 ); 3) for the adsorption of bilirubin in the treatment of the liver disease hyperbilirubinemia via hemoperfusion ( Wu et al, 2018 ); 4) for the removal of bacteria, dyes and proteins by water filtration membranes ( Ahmad Khairuddin et al, 2018 ); or 5) for the generation of high-speed humidity sensors in conjugation with multiwall carbon nanotubes ( Bhattacharya and Sasmal, 2016 ).…”