TY - JOUR
T1 - Structural and optical properties of ZnO micro-spheres and cages by oxidation of metallic Zn powder
AU - Umar, A.
AU - Kim, S. H.
AU - Im, Y. H.
AU - Hahn, Y. B.
N1 - Funding Information:
This work was supported in part by the Brain Korea 21 project in 2005 and the Program for the Training of Graduate Students in Regional Innovation which was conducted by the Ministry of Commerce Industry and Energy of the Korean Government.
PY - 2006/1
Y1 - 2006/1
N2 - ZnO nano-spheres and micro-sized hollow spheres/cages have been prepared on two different substrates, Si(100) and steel alloy, by a simple vapor-solid reaction method using different zinc precursors i.e. ZnCl2 and metallic zinc powder in the presence of oxygen at different process temperatures. The morphological studies show that the deposited ZnO micro-sized hollow spheres/cages have average sizes in the range of 1-5 μm while ZnO nano-spheres vary from 200 to 500 nm. Transmission electron microscope and X-ray diffraction analysis showed a wurtzite hexagonal structure for the synthesized products which are highly crystalline and grown along the [0001] direction. The Raman spectra exhibited a characteristic ZnO wurtzite hexagonal peak at 436.9 cm-1 in the case of Si(100) substrate, while at 437 cm-1 in the case of steel alloy substrate. The room temperature photoluminescence spectra in both the cases showed a broad band in the visible region with suppressed and short UV emission indicating that these structures have more structural defects.
AB - ZnO nano-spheres and micro-sized hollow spheres/cages have been prepared on two different substrates, Si(100) and steel alloy, by a simple vapor-solid reaction method using different zinc precursors i.e. ZnCl2 and metallic zinc powder in the presence of oxygen at different process temperatures. The morphological studies show that the deposited ZnO micro-sized hollow spheres/cages have average sizes in the range of 1-5 μm while ZnO nano-spheres vary from 200 to 500 nm. Transmission electron microscope and X-ray diffraction analysis showed a wurtzite hexagonal structure for the synthesized products which are highly crystalline and grown along the [0001] direction. The Raman spectra exhibited a characteristic ZnO wurtzite hexagonal peak at 436.9 cm-1 in the case of Si(100) substrate, while at 437 cm-1 in the case of steel alloy substrate. The room temperature photoluminescence spectra in both the cases showed a broad band in the visible region with suppressed and short UV emission indicating that these structures have more structural defects.
UR - http://www.scopus.com/inward/record.url?scp=29344443063&partnerID=8YFLogxK
U2 - 10.1016/j.spmi.2005.08.046
DO - 10.1016/j.spmi.2005.08.046
M3 - Conference article
AN - SCOPUS:29344443063
SN - 0749-6036
VL - 39
SP - 238
EP - 246
JO - Superlattices and Microstructures
JF - Superlattices and Microstructures
IS - 1-4
T2 - E-MRS 2005 Symposium G: ZnO and Related Materials Part 2
Y2 - 31 May 2005 through 3 June 2005
ER -