title: CdS/CdSe lateral heterostructure nanobelts by a two-step physical vapor transport method.
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.
authors.affiliation: Department of Physics, Dong-A University, Busan, Korea.
authors.forename: Yu Lee
authors.initials: YL
authors.lastname: Kim
authors.forename: Jae Hun
authors.initials: JH
authors.lastname: Jung
authors.forename: Hyun Sik
authors.initials: HS
authors.lastname: Yoon
authors.forename: Man Suk
authors.initials: MS
authors.lastname: Song
authors.forename: Se Hwan
authors.initials: SH
authors.lastname: Bae
authors.forename: Yong
authors.initials: Y
authors.lastname: Kim
authors.forename: Zhi Gang
authors.initials: ZG
authors.lastname: Chen
authors.forename: Jin
authors.initials: J
authors.lastname: Zou
authors.forename: Hannah J
authors.initials: HJ
authors.lastname: Joyce
authors.forename: Qiang
authors.initials: Q
authors.lastname: Gao
authors.forename: Hark Hoe
authors.initials: HH
authors.lastname: Tan
authors.forename: Chennupati
authors.initials: C
authors.lastname: Jagadish