Thermal and Optical Activation Mechanisms of Nanospring-Based Chemiresistors

Sensors

Vladimir Dobrokhotov⁴  Landon Oakes⁴  Dewayne Sowell⁴  Alexander Larin⁴  Jessica Hall⁴  Alexander Barzilov⁴  Alex Kengne³  Pavel Bakharev³  Giancarlo Corti³  Timothy Cantrell¹  Tej Prakash¹  Joseph Williams²  Leah Bergman³  Jesse Huso³ 

[1] GoNano Technologies, 112 Sweet Ave., Moscow, ID 83843, USA; E-Mails:;ElectroOptics Research Institute and Nanotechnology Center, University of Louisville, Louisville, KY 40292, USA; E-Mail:;Department of Physics, E&P Bldg, University of Idaho, Moscow, ID 83844, USA; E-Mails:;Department of Physics and Astronomy, Western Kentucky University, Bowling Green, KY 42101, USA; E-Mails:

关键词: nanosprings;    sensor;    electronic nose;   

DOI  :  10.3390/s120505608

来源: mdpi

【 摘 要 】

Chemiresistors (conductometric sensor) were fabricated on the basis of novel nanomaterials—silica nanosprings ALD coated with ZnO. The effects of high temperature and UV illumination on the electronic and gas sensing properties of chemiresistors are reported. For the thermally activated chemiresistors, a discrimination mechanism was developed and an integrated sensor-array for simultaneous real-time resistance scans was built. The integrated sensor response was tested using linear discriminant analysis (LDA). The distinguished electronic signatures of various chemical vapors were obtained at ppm level. It was found that the recovery rate at high temperature drastically increases upon UV illumination. The feasibility study of the activation method by UV illumination at room temperature was conducted.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland