CdS nanowires with PbS nanoparticles surface coating as room temperature liquefied petroleum gas sensor

Room temperature chemical method was used to surface coat PbS nanoparticles onto CdS nanowires to get high surface area nano-heterojunction. This high surface architecture was exposed to sense liquefied petroleum gas (LPG) at room temperature (27 degrees C) which is an advantage to adsorb and de-adsorb LPG molecules easily by penetrating from top to bottom. At room temperature, the formed nano-heterojunction exhibited gas response more than 60% upon 1200 ppm exposure to of LPG with faster response and recovery time as 120 and 105 s, respectively. The formed device showed stable response of 93% for 10 days. (C) 2014 Elsevier By. All rights reserved.