Percolation-amplified infrared sensitivity in titanium oxide-multi-walled carbon nanotube composite films. (21st March 2019)

• Record Type: Journal Article
• Authors: Liang, Qian; Xu, Xiangdong; Zhou, Huaxin; Park, Junsung; Xu, Jimmy; Jiang, Yadong; Cheng, Xiaomeng; Gu, Yu
• Is Part Of: Nanotechnology. Volume 30:Number 23(2019)
• Publication Date: 2019-03-21
• Subjects: titanium oxide -- carbon nanotubes -- electrical properties -- thermal properties -- 1/f noise; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ab0830
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Titanium dioxide (TiO2 )-multi-walled carbon nanotube (MWCNT) thin films were prepared and studied systematically for the effects of the concentration of MWCNTs on the electro-optical properties. Result shows that the addition of MWCNTs not only improves the optical absorption and electrical conductivity, but also reduces the 1/ f noise of the films. Percolation phenomenon is observed at MWCNT concentrations of 0.20–0.25 wt%. In this concentration range, the composite films exhibit an abrupt rise of the temperature coefficient of resistance value (−2.93% K −1 ) and large general thermal parameter, both of which are desirable for applications in uncooled infrared detectors.