2024-03-28T11:38:41Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/857772023-01-02T08:54:43Zcom_10261_66com_10261_3com_10261_113com_10261_4col_10261_319col_10261_366
00925njm 22002777a 4500
dc
Gutiérrez, J.
author
Getino, J.
author
Horrillo, Carmen
author
Arés, L.
author
Robla, J. I.
author
García, C.
author
Sayago, I.
author
1998
A tin oxide sensor array has been fabricated using the r.f. reactive sputtering technique. Some elements of the array have been doped with Pt, Pd and Al by sputtering. Sensors have been characterized by DC electrical measurements for different volatile organic compounds (VOCs) such as benzene, toluene, chloroform, propanal, methyl-ethyl-ketone (MEK) and octane, in a concentration range from 50 to 500 ppm in dry air at 300°C. The best response has been obtained by Pt and Pd doped sensors for the oxygenated compounds, but for all gases good sensitivities are shown. The impedance spectra were obtained by AC variable-frequency measurements for all the sensors in air, in benzene and in propanal atmospheres at 300°C. The VOCs peak frequencies changed with regard to air peak frequencies for all the sensors. The roles of dopants and doping level are discussed. © 1998 Elsevier Science S.A.
Thin Solid Films 317: 429- 431 (1998)
http://hdl.handle.net/10261/85777
10.1016/S0040-6090(97)00636-6
Electrical characterization of a thin film tin oxide sensor array for VOCs detection