A study of hydrogen detection with palladium modified porous silicon

Nanocrystalline Porous Silicon

“…This simple and exact method is sensitive to the contact potential difference (CPD) between a vibrating reference electrode and the surface to be investigated. An attempt was made to use PS-Si interface as a sensor structure together with vibrating capacitor readout (Polishchuk et al, 1998). An amorphous silicon on silicon structure, similar to the PS-Si system was reported for alcohol sensor (Sueva et al, 2002).…”

“…Depending on the factors like grain size, porosity and the thickness of the thin film, porous silicon can appreciably be used as a gas sensor operating at low temperature (Mizsei, 2007). Improved gas response behaviour of a palladium doped porous silicon based hydrogen sensor was reported by Polishchuk et al (Polishchuk et al 1998). C. Tsamis and co workers (Tsamis et al, 2002) reported on the catalytic oxidation of hydrogen to water on Pd doped porous silicon.…”

Gas Analisis System Based on the Porous Silicon Structures

“…Зокрема, інкорпорація в поруватий шар наночастинок паладію спри-яє підвищенню чутливості сенсорів до моле-кул водню та воднемістких сполук [6][7][8]. З ін-шого боку, використовуючи високу чутливість оксиду цинку до молекул оксиду азоту, етано-лу та метану [9][10][11] можна покращити селек-тивність сенсорів на основі ПК шляхом оса-дження наноструктур ZnO на поруватий шар.…”

Structure and Surface Modification of Porous Silicon

“…It has been shown that the improvement of sensitivity and selectivity can be achieved by deposition of palladium (Polishchuk et al 1998 ) and copper (Arwin et al 2003 ) on the PSi layers. Arwin et al ( 2003 ) showed that sensitivity to methanol increased by a factor of 2.…”