Title: Direct observation of melting behaviors at the nanoscale under electron beam and heat to form hollow nanostructures
Authors: Huang, Chun-Wei
Hsin, Cheng-Lun
Wang, Chun-Wen
Chu, Fu-Hsuan
Kao, Chen-Yen
Chen, Jui-Yuan
Huang, Yu-Ting
Lu, Kuo-Chang
Wu, Wen-Wei
Chen, Lih-Juann
Department of Materials Science and Engineering
Issue Date: 2012
Abstract: "We report the melting behaviours of ZnO nanowire by heating ZnO-Al2O3 core-shell heterostructures to form Al2O3 nanotubes in an in situ ultrahigh vacuum transmission electron microscope (UHV-TEM). When the ZnO-Al2O3 core-shell nanowire heterostructures were annealed at 600 degrees C under electron irradiation, the amorphous Al2O3 shell became single crystalline and then the ZnO core melted. The average vanishing rate of the ZnO core was measured to be 4.2 nm s(-1). The thickness of the Al2O3 nanotubes can be precisely controlled by the deposition process. Additionally, the inner geometry of nanotubes can be defined by the initial ZnO core. The result shows a promising method to obtain the biocompatible Al2O3 nanotubes, which may be applied in drug delivery, biochemistry and resistive switching random access memory (ReRAM)."
URI: http://hdl.handle.net/11536/16682
ISSN: 2040-3364
Volume: 4
Issue: 15
End Page: 4702
Appears in Collections:Articles

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