Department of Physics, Sir Parashurambhau College Pune, Pune 411030, India
Adv. Mater. Lett., 2013, 'ICNANO 2011', 4 (1), pp 58-63
DOI: 10.5185/amlett.2013.icnano.228
Publication Date (Web): Oct 14, 2012
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Synthesized nanophase SnO2 powder is used to fabricate thick film resistors using screen printing technology. The surfaces of the thick film resistors were modified by dip coating in platinum chloride (PtCl2) solution of optimized 1.5 M for different time periods of 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 minutes. Sintering of the films is carried out at different temperatures of 550, 600, 650, 700, 750 and 800°C. The films were tested for 400 ppm of LPG. Thick films which were dip coated for 5 minutes and sintered at 750oC show the highest sensitivity towards LPG which is ten times higher than undoped SnO2 sensors. The characterization of the sensors was done using XRD, EDX and SEM. The sensors were found to be extremely stable and repeatable with a response and recovery time of 10 and 22 s with a minimum detection limit of 5 ppm of LPG.
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