Growth, Cathodoluminescence and Field Emission of ZnS Tetrapod Tree-like Heterostructures
文献类型：期刊论文
| 作者 | Z. G. Chen ; J. Zou ; G. Liu ; X. D. Yao ; F. Li ; X. L. Yuan ; T. Sekiguchi ; G. Q. Lu ; H. M. Cheng |
| 刊名 | Advanced Functional Materials
 |
| 出版日期 | 2008 |
| 卷号 | 18期号:19页码:3063-3069 |
| 关键词 | single-crystal nanorings nanowires nanobelts nanostructures photoluminescence nanocrystals fabrication nanorods arrays cdte |
| ISSN号 | 1616-301X |
| 中文摘要 | We report the growth mechanism, cathodoluminescence and field emission of dual phase ZnS tetrapod tree-like heterostructures. This novel heterostructures consist of two phases: zinc blende for the trunk and hexagonal wurtzite for the branch. Direct evidence is presented for the polarity induced growth of tetrapod ZnS trees through high-resolution electron microscopy study, demonstrating that Zn-terminated ZnS (111)/(0001) polar surface is chemically active and S-terminated ((1) over bar(1) over bar(1) over bar)/(000 (1) over bar) polar surface is inert in the growth of tetrapod ZnS trees. Two strong UV emissions centered at 3.68 and 3.83 eV have been observed at room temperature, which are attributed to the bandgap emissions from the zinc blende trunk and hexagonal wurtzite branch, indicating that such structures can be used as unique electromechanical and optoelectronic components in potential light sources, laser and light emitting display devices. In addition, the low turn-on field (2.66 V mu m(-1)), high field-enhancement factor (over 2600), large current density (over 30 mAcm(-2) at a macroscopic field of 4.33 V mu m(-1)) and small fluctuation (similar to 1%) further indicate the availability of ZnS tetrapod tree-like heterostructures for field emission panel display. This excellent field-emission property is attributed to the specific crystallographic feature with high crystallinity and cone-shape patterned branch with nanometer-sized tips. Such a structure may optimize the FE properties and make a promising field emitter. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32682]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Z. G. Chen,J. Zou,G. Liu,et al. Growth, Cathodoluminescence and Field Emission of ZnS Tetrapod Tree-like Heterostructures[J]. Advanced Functional Materials,2008,18(19):3063-3069. |
| APA | Z. G. Chen.,J. Zou.,G. Liu.,X. D. Yao.,F. Li.,...&H. M. Cheng.(2008).Growth, Cathodoluminescence and Field Emission of ZnS Tetrapod Tree-like Heterostructures.Advanced Functional Materials,18(19),3063-3069. |
| MLA | Z. G. Chen,et al."Growth, Cathodoluminescence and Field Emission of ZnS Tetrapod Tree-like Heterostructures".Advanced Functional Materials 18.19(2008):3063-3069. |
入库方式： OAI收割
来源：金属研究所
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