Synthesis and physical characteristics of AlOx-coated ZnO nanorod arrays grown in aqueous solution at low temperatures

Autor:	San-Yuan Chen, Syh Yuh Cheng, Chi Sheng Hsiao
Rok vydání:	2008
Předmět:	Aqueous solution Materials science Photoluminescence Crystal growth Nanotechnology General Chemistry Condensed Matter Physics Blue emission Amorphous solid Si substrate Chemical engineering General Materials Science Nanorod Single crystal
Zdroj:	Journal of Physics and Chemistry of Solids. 69:625-628
ISSN:	0022-3697
DOI:	10.1016/j.jpcs.2007.07.088
Popis:	AlO x –ZnO core–shell nanorods arrays have been successfully synthesized by soaking the ZnO nanorods in the sol–gel solution of Al(NO 3 ) 3 and NH 4 OH at room temperature. It was found that both crystal growth and morphology of the AlO x –ZnO core–shell nanorods are strongly influenced by the solution pH value. SEM image shows that the AlO x –ZnO core–shell nanorods can be perpendicularly grown on the ZnO f /Si substrate under the solution only with a pH value of 6–7. High-resolution TEM observation demonstrates that the structure of the AlO x layer is amorphous and the ZnO nanorod core remains single crystal. After annealed at 400 °C in N 2 atmosphere, a strong photoluminescence peak corresponding to blue emission (∼450 nm) was detected from the AlO x –ZnO core–shell nanorods that may result from the induced defects due to interaction between AlO x shell and ZnO nanorods.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::aa96a3cddd8ee6012d543daa362271a3 https://doi.org/10.1016/j.jpcs.2007.07.088 Zobrazit plný text záznamu Full Text from ScienceDirect