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
Pages453-458
Number of pages6
Publication statusPublished - 2005 Dec 1
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

Fingerprint

Nanowires
nanowires
synthesis
wire
Wire
Vanadium
Optical switches
vanadium oxides
blue shift
red shift
Oxides
Energy gap
rods
switches
Vapors
vapors
tubes
Crystalline materials
Transmission electron microscopy
catalysts

All Science Journal Classification (ASJC) codes

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

Cite this

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).
Mathur, Sanjay ; Barth, Sven ; Pyun, Jae Chul ; Shen, Hao. / Size- and surface-dependent photoresistance in SnO2 nanowires. Assembly at the Nanoscale: Toward Functional Nanostructured Materials. 2005. pp. 453-458 (Materials Research Society Symposium Proceedings).
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Mathur, S, Barth, S, Pyun, JC & Shen, H 2005, Size- and surface-dependent photoresistance in SnO2 nanowires. in Assembly at the Nanoscale: Toward Functional Nanostructured Materials. Materials Research Society Symposium Proceedings, vol. 901, pp. 453-458, 2005 MRS Fall Meeting, Boston, MA, United States, 05/11/28.

Size- and surface-dependent photoresistance in SnO2 nanowires. / Mathur, Sanjay; Barth, Sven; Pyun, Jae Chul; Shen, Hao.

Assembly at the Nanoscale: Toward Functional Nanostructured Materials. 2005. p. 453-458 (Materials Research Society Symposium Proceedings; Vol. 901).

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

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AB - 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.

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Mathur S, Barth S, Pyun JC, Shen H. Size- and surface-dependent photoresistance in SnO2 nanowires. In Assembly at the Nanoscale: Toward Functional Nanostructured Materials. 2005. p. 453-458. (Materials Research Society Symposium Proceedings).