Crystalline Cd(OH)2/CdCO3 nanowires, having lengths in the range from 0.3 up to several microns and 5–30 nm in diameter, were synthesized by a microwave-assisted wet chemical route and used as a precursor to obtain CdO nanostructures after a suitable thermal treatment in air. The morphology and microstructure of the as-synthesized and annealed materials have been investigated by scanning electron microscopy, transmission electron microscopy, x-ray diffraction and thermogravimetry–differential scanning calorimetry. The change in morphology and electrical properties with temperature has revealed a wire-to-rod transformation along with a decreases of electrical resistance. Annealed samples were printed on a ceramic substrate with interdigitated contacts to fabricate resistive solid state sensors. Gas sensing properties were explored by monitoring CO2 in synthetic air in the concentration range 0.2–5 v/v% (2000–50 000 ppm). The effect of annealing temperature, working temperature and CO2 concentration on sensing properties (sensitivity, response/recovery time and stability) were investigated. The results obtained demonstrate that CdO-based thick films have good potential as novel CO2 sensors for practical applications.
Krishnakumar, T., Jayaprakash, R., Prakash, T., Sathyaraj, D., Donato, N., Licoccia, S., et al. (2011). CdO-based nanostructures as novel CO2 gas sensors. NANOTECHNOLOGY, 22, 325501-325509.
|Tipologia:||Articolo su rivista|
|Citazione:||Krishnakumar, T., Jayaprakash, R., Prakash, T., Sathyaraj, D., Donato, N., Licoccia, S., et al. (2011). CdO-based nanostructures as novel CO2 gas sensors. NANOTECHNOLOGY, 22, 325501-325509.|
|IF:||Con Impact Factor ISI|
|Settore Scientifico Disciplinare:||Settore CHIM/07 - Fondamenti Chimici delle Tecnologie|
|Revisione (peer review):||Sì, ma tipo non specificato|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1088/0957-4484/22/32/325501|
|Stato di pubblicazione:||Pubblicato|
|Data di pubblicazione:||2011|
|Titolo:||CdO-based nanostructures as novel CO2 gas sensors|
|Autori:||Krishnakumar, T; Jayaprakash, R; Prakash, T; Sathyaraj, D; Donato, N; Licoccia, S; Latino, M; Stassi, A; Neri, G|
|Appare nelle tipologie:||01 - Articolo su rivista|