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
Y1 - 2005
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.
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U2 - 10.1557/proc-0901-rb15-02
DO - 10.1557/proc-0901-rb15-02
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
PB - Materials Research Society
T2 - 2005 MRS Fall Meeting
Y2 - 28 November 2005 through 2 December 2005
ER -