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A.C. Mofor A.S. Bakin A. Elshaer D. Fuhrmann F. Bertram A. Hangleiter J. Christen A. Waag 《Applied Physics A: Materials Science & Processing》2007,88(1):17-20
The fabrication of low-dimensional ZnO structures has attracted enormous attention as such nanostructures are expected to
pave the way for many interesting applications in optoelectronics, spin electronics gas sensor technology and biomedicine.
Many reported fabrication methods, especially for ZnO nanorods are mostly based on catalyst-assisted growth techniques that
employ metal-organic sources and other contaminating agents like graphite to grow ZnO nanorods at relatively high temperatures.
We report on catalyst-free vapour-phase epitaxy growth of ZnO nanorods on 6H-SiC and (11-20)Al2O3 using purely elemental sources at relatively low temperatures and growth pressure. ZnO nanorods with widths of 80–900 nm
and lengths of up to 12 μm were obtained. Nanorod density on the order of 109 cm-2 with homogenous luminescence and high purity was also noted.
PACS 81.10.Bk; 81.15.Kk; 81.16.Hc; 78.55.Et; 81.05.Dz; 81.07.Bc 相似文献
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Caleigh S. Garton Noelle K. DeRose Dylan Dominguez Maria L. Turbi-Henderson Ashley L. Lehr Ashley D. Padilla Scott D. Twining Stephanie Casas Chidozie O. Alozie Azad L. Gucwa Mohammed R. Elshaer Michael De Castro 《Molecules (Basel, Switzerland)》2021,26(12)
A series of 2-deoxy-2-iodo-α-d-mannopyranosylbenzotriazoles was synthesized using the benzyl, 4,6-benzylidene and acetyl protected D-glucal in the presence of N-iodosuccinimide (NIS). Subsequent removal of the iodine at the C-2 position using tributyltin hydride under free radical conditions afforded the 2-deoxy-α-d-glucopyranosylbenzotriazoles in moderate to high yields. This method was extended to the preparation of substituted 2-deoxy-β-d-glucopyranosylimidazoles as well. The stereoselectivity of the addition reaction and the effect of the protecting group and temperature on anomer distribution of the benzotriazole series were also investigated. The anticancer properties of the newly synthesized compounds were evaluated in a series of viability studies using HeLa (human cervical adenocarcinoma), human breast and lung cancer cell lines. The N-[3,4,6-tri-O-benzyl-2-deoxy-α-d-glucopyranosyl]-1H-benzotriazole and the N-[3,4,6-tri-O-acetyl-2-deoxy-α-d-glucopyranosyl]-2H-benzotriazole were found to be the most potent cancer cell inhibitors at 20 µM concentrations across all four cell lines. 相似文献
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