TY - JOUR
T1 - Chromium and ruthenium-doped zinc oxide thin films for propane sensing applications
AU - Gómez-Pozos, Heberto
AU - González-Vidal, José Luis
AU - Torres, Gonzalo Alberto
AU - Rodríguez-Baez, Jorge
AU - Maldonado, Arturo
AU - Olvera, María de la Luz
AU - Acosta, Dwight Roberto
AU - Avendaño-Alejo, Maximino
AU - Castañeda, Luis
PY - 2013/3
Y1 - 2013/3
N2 - Chromium and ruthenium-doped zinc oxide (ZnO:Cr) and (ZnO:Ru) thin solid films were deposited on soda-lime glass substrates by the sol-gel dip-coating method. A 0.6 M solution of zinc acetate dihydrate dissolved in 2-methoxyethanol and monoethanolamine was used as basic solution. Chromium (III) acetylacetonate and Ruthenium (III) trichloride were used as doping sources. The Ru incorporation and its distribution profile into the films were proved by the SIMS technique. The morphology and structure of the films were studied by SEM microscopy and X-ray diffraction measurements, respectively. The SEM images show porous surfaces covered by small grains with different grain size, depending on the doping element, and the immersions number into the doping solutions. The sensing properties of ZnO:Cr and ZnO:Ru films in a propane (C3H8) atmosphere, as a function of the immersions number in the doping solution, have been studied in the present work. The highest sensitivity values were obtained for films doped from five immersions, 5.8 and 900, for ZnO:Cr and ZnO:Ru films, respectively. In order to evidence the catalytic effect of the chromium (Cr) and ruthenium (Ru), the sensing characteristics of undoped ZnO films are reported as well.
AB - Chromium and ruthenium-doped zinc oxide (ZnO:Cr) and (ZnO:Ru) thin solid films were deposited on soda-lime glass substrates by the sol-gel dip-coating method. A 0.6 M solution of zinc acetate dihydrate dissolved in 2-methoxyethanol and monoethanolamine was used as basic solution. Chromium (III) acetylacetonate and Ruthenium (III) trichloride were used as doping sources. The Ru incorporation and its distribution profile into the films were proved by the SIMS technique. The morphology and structure of the films were studied by SEM microscopy and X-ray diffraction measurements, respectively. The SEM images show porous surfaces covered by small grains with different grain size, depending on the doping element, and the immersions number into the doping solutions. The sensing properties of ZnO:Cr and ZnO:Ru films in a propane (C3H8) atmosphere, as a function of the immersions number in the doping solution, have been studied in the present work. The highest sensitivity values were obtained for films doped from five immersions, 5.8 and 900, for ZnO:Cr and ZnO:Ru films, respectively. In order to evidence the catalytic effect of the chromium (Cr) and ruthenium (Ru), the sensing characteristics of undoped ZnO films are reported as well.
KW - Sol-gel
KW - Thin solid films
KW - Zinc oxide
UR - http://www.scopus.com/inward/record.url?scp=84875165482&partnerID=8YFLogxK
U2 - 10.3390/s130303432
DO - 10.3390/s130303432
M3 - Artículo
SN - 1424-8220
VL - 13
SP - 3432
EP - 3444
JO - Sensors (Switzerland)
JF - Sensors (Switzerland)
IS - 3
ER -