TY - JOUR
T1 - Catalyst-free synthesis of ZnO nanowires on Si by oxidation of Zn powders
AU - Sekar, A.
AU - Kim, S. H.
AU - Umar, A.
AU - Hahn, Y. B.
PY - 2005/4/15
Y1 - 2005/4/15
N2 - ZnO nanowires were grown on Si (1 0 0) substrates by oxidation of metallic Zn powder at 600 °C. Sea-urchin-like nanostructures, consisting of straight nanowires of ZnO with blunt faceted ends with a sudden reduction in diameter projecting out, were observed, having diameters of 30-60 nm and lengths of 2-4 μm. TEM analysis and SAED patterns showed that the as-grown nanostructures are highly crystalline in nature and preferably grown along the [0 0 0 1] direction, which is consistent with XRD analysis. Room-temperature photoluminescence (PL) measurements showed a reduced near band-edge emission in the UV region at 380 nm, while a strong deep level emission was observed in the visible region at 500-530 nm. A model for vapor-solid (VS) growth mechanism of ZnO nanowires was presented.
AB - ZnO nanowires were grown on Si (1 0 0) substrates by oxidation of metallic Zn powder at 600 °C. Sea-urchin-like nanostructures, consisting of straight nanowires of ZnO with blunt faceted ends with a sudden reduction in diameter projecting out, were observed, having diameters of 30-60 nm and lengths of 2-4 μm. TEM analysis and SAED patterns showed that the as-grown nanostructures are highly crystalline in nature and preferably grown along the [0 0 0 1] direction, which is consistent with XRD analysis. Room-temperature photoluminescence (PL) measurements showed a reduced near band-edge emission in the UV region at 380 nm, while a strong deep level emission was observed in the visible region at 500-530 nm. A model for vapor-solid (VS) growth mechanism of ZnO nanowires was presented.
KW - A2. Catalyst-free synthesis
KW - A2. Vapor-solid growth mechanism
KW - B1. ZnO nanowires
UR - http://www.scopus.com/inward/record.url?scp=15844383825&partnerID=8YFLogxK
U2 - 10.1016/j.jcrysgro.2005.02.006
DO - 10.1016/j.jcrysgro.2005.02.006
M3 - Article
AN - SCOPUS:15844383825
SN - 0022-0248
VL - 277
SP - 471
EP - 478
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
IS - 1-4
ER -