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 language | English |
|---|---|
| Title of host publication | Assembly at the Nanoscale |
| Subtitle of host publication | Toward Functional Nanostructured Materials |
| Pages | 453-458 |
| Number of pages | 6 |
| Publication status | Published - 2005 Dec 1 |
| Event | 2005 MRS Fall Meeting - Boston, MA, United States Duration: 2005 Nov 28 → 2005 Dec 2 |
Publication series
| Name | Materials Research Society Symposium Proceedings |
|---|---|
| Volume | 901 |
| ISSN (Print) | 0272-9172 |
Other
| Other | 2005 MRS Fall Meeting |
|---|---|
| Country | United States |
| City | Boston, MA |
| Period | 05/11/28 → 05/12/2 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Cite this
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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 proceeding › Conference contribution
TY - GEN
T1 - Size- and surface-dependent photoresistance in SnO2 nanowires
AU - Mathur, Sanjay
AU - Barth, Sven
AU - Pyun, Jae Chul
AU - Shen, Hao
PY - 2005/12/1
Y1 - 2005/12/1
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=34249930896&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34249930896&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:34249930896
SN - 1558998551
SN - 9781558998551
T3 - Materials Research Society Symposium Proceedings
SP - 453
EP - 458
BT - Assembly at the Nanoscale
ER -