Size- and surface-dependent photoresistance in SnO2 nanowires

Sanjay Mathur, Sven Barth, Jae Chul Pyun, Hao Shen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Nanostructured one-dimensional materials, such as nanowires, tubes and rods, are gaining increasing attention due to interesting properties and confinement effects, however controlled synthesis of these structures is still limited to a few methods. We present here the synthesis of SnO2 nanowires (Ø, 50 - 1000 nm) at moderate temperatures (550 - 900°C) using a molecular source [Sn(OBu1)4] with pre-existent Sn-O bonds. The growth occurs via a catalyst driven vapor-solid-solid mechanism. Size-selective synthesis of NWs in high areal density was achieved by choosing Au particles of appropriate size. HR-TEM analysis reveals the single crystalline behaviour of wires with a preferred growth direction [100]. Use of SnO 2 nanowires as potential optical switches for UV applications was demonstrated by the photo-response measurements. Determination of band gap values confirmed the blue-shift of the main photo-response peak with shrinking radial dimensions of the wires. Furthermore, deposition of vanadium oxide onto SnO2 led to a red-shift of the main conduction value of the nanowires.

Original languageEnglish
Title of host publicationAssembly at the Nanoscale
Subtitle of host publicationToward Functional Nanostructured Materials
PublisherMaterials Research Society
Pages453-458
Number of pages6
ISBN (Print)1558998551, 9781558998551
DOIs
Publication statusPublished - 2005
Event2005 MRS Fall Meeting - Boston, MA, United States
Duration: 2005 Nov 282005 Dec 2

Publication series

NameMaterials Research Society Symposium Proceedings
Volume901
ISSN (Print)0272-9172

Other

Other2005 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period05/11/2805/12/2

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Mathur, S., Barth, S., Pyun, J. C., & Shen, H. (2005). Size- and surface-dependent photoresistance in SnO2 nanowires. In Assembly at the Nanoscale: Toward Functional Nanostructured Materials (pp. 453-458). (Materials Research Society Symposium Proceedings; Vol. 901). Materials Research Society. https://doi.org/10.1557/proc-0901-rb15-02