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)


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
Number of pages6
ISBN (Print)1558998551, 9781558998551
Publication statusPublished - 2005
Event2005 MRS Fall Meeting - Boston, MA, United States
Duration: 2005 Nov 282005 Dec 2

Publication series

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


Other2005 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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