title: Highly Selective Sensing of CO, C6H6, and C7H8 Gases by Catalytic Functionalization with Metal Nanoparticles.
abstract: We have fabricated multiple networked SnO2 nanowires and subsequently decorated them with uniformly distributed metal nanoparticles (NPs). The sensing tests indicated that the Pt-, Pd-, and Au-decorated SnO2 nanowires exhibited excellent sensing behavior, specifically for C7H8, C6H6, and CO gases, respectively. We discussed the associated sensing mechanisms in regard to the selective catalytic effects of metal NPs. In addition, by means of d-band theory, we explained the catalytic capabilities of each metal and proposed design principles for exploring new catalytic metals. The present study will pave the way for further development of high-selectivity sensors.
authors.affiliation: Department of Materials Science and Engineering, Inha University , Incheon 402-751, Republic of Korea.
authors.forename: Jae-Hun
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Entropic Interface Group, Singapore University of Technology & Design , Singapore 487372, Singapore.
authors.forename: Ping
authors.initials: P
authors.lastname: Wu
authors.affiliation: Division of Materials Science and Engineering, Hanyang University , Seoul 133-791, Republic of Korea.
authors.forename: Hyoun Woo
authors.initials: HW
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Inha University , Incheon 402-751, Republic of Korea.
authors.forename: Sang Sub
authors.initials: SS
authors.lastname: Kim
keywords: catalyst; d-band theory; gas; metal functionalization; selective sensing