Nanocatalytic effects in gold/tin functionalized tin oxide nanowires for enhanced co sensing

R. Ganesan, N. Donia, S. Mathur, I. Johnson

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


Tin oxide (SnO₂) nanowires were synthesized by a molecule based chemical vapour deposition process and the metallic additives Sn and Au were incorporated by treating nanowires in the mixture of Argon and O₂ plasma. Tin inclusion in the SnO₂ nanowires were achieved by preferential etching of the lattice oxygen atoms from the surface of SnO₂ nanowires through the plasma treatment, which lead to chemically directed synthesis of Sn⁰/ SnO₂ nanocomposites. However, Gold incorporated nanowires were obtained by treating the Au sputtered samples (5-13 nm) at low plasma energy to induce nucleation of Au nanocrystals on SnO₂ backbone. Investigations on Carbon-monoxide (CO) sensing behaviour of SnO₂ nanostructures as a function of surface structure, composition and electronic properties are reported. Metal-functionalized nanowires showed better sensitivity for CO at lower operating temperature and exhibited higher transduction towards altering gas atmospheres attributed to a spill-over effect in Au incorporated tin oxide nanowires (AuTO), whereas the surface valence dynamics (Sn⁰/ Sn²⁺/ Sn⁴⁺) is responsible for higher sensitivity of Sn incorporated system (SnTO).
Original languageEnglish
Title of host publicationICONN 2010
Subtitle of host publicationproceedings of the 2010 International Conference on Nanoscience and Nanotechnology
EditorsAndrew Dzurak
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages2
ISBN (Print)9781424452620
Publication statusPublished - 2010
Externally publishedYes
EventInternational Conference on Nanoscience and Nanotechnology (3rd : 2010) - Sydney
Duration: 22 Feb 201026 Feb 2010


ConferenceInternational Conference on Nanoscience and Nanotechnology (3rd : 2010)


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