PEDOT:PSS shell on CdS nanowires: Room temperature LPG sensor

• Published in: Journal of alloys and compounds 2014-04, Vol.592, p.1-5
• Main Authors: Sonawane, N.B., Ahire, R.R., Gurav, K.V., Kim, J.H., Sankapal, B.R.
• Format: Article
• Language: English
• Subjects: Cadmium sulfides; Chemical route; Exact sciences and technology; General equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; LPG; LPG sensor; Nanoheterojunction; Nanostructure; Nanowires; Natural gas; p-PEDOT:PSS on n-CdS; Physics; Room temperature gas sensing; Sensors; Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing; Shells; Styrenes
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.12.090

•Synthesis of nanowires at room temperature.•PEDOT:PSS shell formation on CdS nanowires with complete coverage by dip coating.•Formation of heterostructure between CdS and PEDOT:PSS towards LPG sensor.•Room temperature detection of LPG using this formed heterostructure. Nanoheterojunctions between p-PEDOT:PSS and n-CdS were fabricated by using simple chemical method at room temperature (27°C) on fluorine doped tin oxide (FTO) coated glass substrate. The thin layer of commercially available poly (3, 4-ethylenedioxythiophene: poly (styrene sulfonic acid)) (PEDOT:PSS) shell was formed on CdS nanowires by dip-coating method. This formed nanoheterojunction was used as liquefied petroleum gas (LPG) sensor at room temperature. The formed nanoheterojunction network with porous and high surface area enables enough space to adsorb and de-adsorb gas molecules easily and showed the gas response of 58.9% under the exposure of LPG (900ppm). The results demonstrate that the shell configuration of p-PEDOT:PSS on n-CdS nanowires to form nanoheterojunction which provides a facile and compatible frame for the potential applications as a LPG sensors which can operate at room temperature.