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다공성 Cr2O3 나노육각기둥을 이용한 C2H5OH 센서
정현묵 ( Hyun Mook Jeong ),이종혼 ( Jong Heun Lee ) 한국센서학회 2012 센서학회지 Vol.21 No.6
Dense Cr-precursor nano-hexaprisms were prepared by heating the Cr-nitrate aqueous solution containing Hexamethylenetetramine and polyvinylpyrrolidone, which were converted into porous Cr2O3 nano-hexaprisms containing nanoparticles by heat treatment of Crprecursors at 600… for 2 h in air atmosphere. At the sensor temperature of 300…, porous Cr2O3 nano-hexaprism showed the high response (Rg/Ra, Rg: resistance in gas, Ra: resistance in air) to 100 ppm C2H5OH (Rg/Ra=69.8) with negligible cross-responses to 100 ppm CO and 5 ppm C6H6. The sensitive and selective detection of C2H5OH in porous Cr2O3 nano-hexaprism were discussed in relation to the morphology of nanostructures.