title: Nanostructured Pt decorated graphene and multi walled carbon nanotube based room temperature hydrogen gas sensor.
abstract: Herein, we report the fabrication of hydrogen gas sensors based on noble nanometal decorated one dimensional multi walled carbon nanotubes and two dimensional graphene by a simple drop casting technique, with practical applications in view. Pt decorated functionalized graphene sheets (Pt/f-G) and Pt decorated functionalized multi walled carbon nanotubes (Pt/f-MWNT) were synthesized and employed as hydrogen sensors. Systematic investigation of hydrogen sensing, at a low detection level of 4 vol% hydrogen in air, of (Pt/f-G) reveals a response time comparable to that of (Pt/f-MWNT) but with a two fold increase in the sensitivity at room temperature. These sensors were also found to be stable over repeated cycles of hydrogenation and dehydrogenation.
authors.affiliation: Nano Functional Materials Technology Centre, Department of Physics, Indian Institute of Technology Madras, Chennai, India.
authors.forename: Adarsh
authors.initials: A
authors.lastname: Kaniyoor
authors.forename: R
authors.initials: R
authors.lastname: Imran Jafri
authors.forename: T
authors.initials: T
authors.lastname: Arockiadoss
authors.forename: S
authors.initials: S
authors.lastname: Ramaprabhu
mesh_terms: D004784:Environmental Monitoring / Q000379:methods; D006108:Graphite / Q000737:chemistry*; D006859:Hydrogen / Q000032:analysis / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D013696:Temperature
chemical_list: D037742:Nanotubes, Carbon; D010984:Platinum; D006108:Graphite; D006859:Hydrogen