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4 results on '"Li-Li WU"'

1. Formation and photoluminescence of one-dimensional SiOx dot array–ZnO nanobelt heterostructures

Author

Hui-Qing Lu, Li-Li Wu, E. Zhang, and Xitian Zhang

Subjects
Materials science, Photoluminescence, business.industry, Dot array, Heterojunction, Nanotechnology, General Chemistry, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, Amorphous solid, Condensed Matter::Materials Science, Semiconductor quantum dots, Transmission electron microscopy, Optoelectronics, General Materials Science, Selected area diffraction, Luminescence, business
Abstract

We designed and successfully synthesized novel SiOx/ZnO heterostructures via one-step thermal reaction route. Orbicular SiOx dots regularly and alternately arrange in the middle of the up/down surfaces of a nanobelt to form a one-dimensional SiOx dot array, respectively, by their self-assembly. A high-resolution transmission electron microscopy study and a selected area electron diffraction pattern revealed that ZnO nanobelts are crystalline while SiOx dots are amorphous. The formation process of such heterostructure is discussed in terms of the Stranski–Krastanow growth mode of semiconductor quantum dots. Strong white luminescence was observed by bare eyes when the photoluminescence spectrum was measured.

Published
2010

2. Preparation of ZnO/In2O3(ZnO)n heterostructure nanobelts

Author

Fu Wei Liu, Haiyang Xu, Hui Qing Lu, Xi Tian Zhang, Li Li Wu, Yao Liang, and Suikong Hark

Subjects
business.industry, Bent molecular geometry, Nanoprobe, Heterojunction, Nanotechnology, General Chemistry, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, Radius of curvature (optics), Catalysis, Condensed Matter::Materials Science, Transmission electron microscopy, Thermal, Optoelectronics, General Materials Science, business, Nanoscopic scale
Abstract

Bent In2O3(ZnO)n/ZnO (n = 4 and 5) heterostructure nanobelts were successfully synthesized by a simple thermal vapor method for the first time, using Au as a catalyst. The heterostructures were characterized by transmission electron microscopy and nanoprobe X-ray energy dispersive. The relationship between the strain induced by lattice mismatch and the radius of curvature of the nanobelts with heterostructure is discussed in terms of geometric mathematics. A formation mechanism of the heterostructures is suggested. Such a structure could be an ideal model system for exploring novel phenomena with potential applications and studying size and dimension dependent properties at the nanoscale.

Published
2010

3. Preparation of ZnO/In2O3(ZnO)nheterostructure nanobelts.

Author

Li Li Wu, Yao Liang, Fu Wei Liu, Hui Qing Lu, Hai Yang Xu, Xi Tian Zhang, and Suikong Hark

Subjects
*ZINC oxide, *HETEROSTRUCTURES, *NANOSTRUCTURED materials, *METAL catalysts, *GOLD, *CURVATURE
Abstract

Bent In2O3(ZnO)n/ZnO (n= 4 and 5) heterostructure nanobelts were successfully synthesized by a simple thermal vapor method for the first time, using Au as a catalyst. The heterostructures were characterized by transmission electron microscopy and nanoprobe X-ray energy dispersive. The relationship between the strain induced by lattice mismatch and the radius of curvature of the nanobelts with heterostructure is discussed in terms of geometric mathematics. A formation mechanism of the heterostructures is suggested. Such a structure could be an ideal model system for exploring novel phenomena with potential applications and studying size and dimension dependent properties at the nanoscale. [ABSTRACT FROM AUTHOR]

Published
2010
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4. Formation and photoluminescence of one-dimensional SiOxdot array–ZnO nanobelt heterostructures.

Author

Hui-Qing Lu, Li-Li Wu, E Zhang, and Xi-Tian Zhang

Subjects
*NANOSTRUCTURED materials, *ZINC oxide, *SILICA, *PHOTOLUMINESCENCE, *HETEROSTRUCTURES, *MOLECULAR self-assembly, *QUANTUM dots, *CRYSTAL growth
Abstract

We designed and successfully synthesized novel SiOx/ZnO heterostructures viaone-step thermal reaction route. Orbicular SiOxdots regularly and alternately arrange in the middle of the up/down surfaces of a nanobelt to form a one-dimensional SiOxdot array, respectively, by their self-assembly. A high-resolution transmission electron microscopy study and a selected area electron diffraction pattern revealed that ZnO nanobelts are crystalline while SiOxdots are amorphous. The formation process of such heterostructure is discussed in terms of the Stranski–Krastanow growth mode of semiconductor quantum dots. Strong white luminescence was observed by bare eyes when the photoluminescence spectrum was measured. [ABSTRACT FROM AUTHOR]

Published
2010
Full Text
View/download PDF

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