Growth, Cathodoluminescence and Field Emission of ZnS Tetrapod Tree-like Heterostructures

IMR OpenIR

	Growth, Cathodoluminescence and Field Emission of ZnS Tetrapod Tree-like Heterostructures
	Z. G. Chen; J. Zou; G. Liu; X. D. Yao; F. Li; X. L. Yuan; T. Sekiguchi; G. Q. Lu; H. M. Cheng
	2008
发表期刊	Advanced Functional Materials
ISSN	1616-301X
卷号	18 期号:19 页码:3063-3069
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.
部门归属	[chen, zhi-gang; yao, xiangdong; lu, gao qing] univ queensland, arc, sch engn, ctr excellence funct nanomat, brisbane, qld 4072, australia. [chen, zhi-gang; zou, jin; liu, gang; yao, xiangdong; li, feng; yuan, xiao-li; sekiguchi, takashi] univ queensland, arc, aibn, ctr excellence funct nanomat, brisbane, qld 4072, australia. [chen, zhi-gang; liu, gang; li, feng; cheng, hui-ming] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [zou, jin] univ queensland, sch engn, brisbane, qld 4072, australia. [zou, jin] univ queensland, ctr microscopy & microanal, brisbane, qld 4072, australia. [yuan, xiao-li; sekiguchi, takashi] natl inst mat sci, adv elect mat ctr, tsukuba, ibaraki 3050444, japan.;chen, zg (reprint author), univ queensland, arc, sch engn, ctr excellence funct nanomat, brisbane, qld 4072, australia;cheng@imr.ac.cn maxlu@uq.edu.au
关键词	Single-crystal Nanorings Nanowires Nanobelts Nanostructures Photoluminescence Nanocrystals Fabrication Nanorods Arrays Cdte
URL	查看原文
WOS记录号	WOS:000260398300027
引用统计	被引频次：50[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32682
专题	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.