CUED Publications database

CdS/CdSe lateral heterostructure nanobelts by a two-step physical vapor transport method.

Kim, YL and Jung, JH and Yoon, HS and Song, MS and Bae, SH and Kim, Y and Chen, ZG and Zou, J and Joyce, HJ and Gao, Q and Tan, HH and Jagadish, C (2010) CdS/CdSe lateral heterostructure nanobelts by a two-step physical vapor transport method. Nanotechnology, 21. 145602-.

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Abstract

The two-dimensional heterostructure nanobelts with a central CdSe region and lateral CdS structures are synthesized by a two-step physical vapor transport method. The large growth rate difference between lateral CdS structures on both +/- (0001) sides of the CdSe region is found. The growth anisotropy is discussed in terms of the polar nature of the side +/- (0001) surfaces of CdSe. High-resolution transmission electron microscopy reveals the CdSe central region covered with non-uniform CdS layer/islands. From micro-photoluminescence measurements, a systematic blueshift of emission energy from the central CdSe region in accordance with the increase of lateral CdS growth temperature is observed. This result indicates that the intermixing rate in the CdSe region with CdS increases with the increase of lateral CdS growth temperature. In conventional CdSSe ternary nanostructures, morphology and emission wavelength were correlated parameters. However, the morphology and emission wavelength are independently controllable in the CdS/CdSe lateral heterostructure nanobelts. This structure is attractive for applications in visible optoelectronic devices.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:46
Last Modified: 14 Dec 2014 22:45
DOI: 10.1088/0957-4484/21/14/145602