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题名: Shape and composition control of Bi19S27(Br3-x,I-x) alloyed nanowires: the role of metal ions
作者: Wu, Yihui1;  Pan, Huanhuan2;  Zhou, Xin1;  Li, Mingrun1;  Zhou, Bin1;  Yang, Chi1, 3;  Zhang, Wen-Hua1;  Jie, Jiansheng2;  Li, Can1
刊名: CHEMICAL SCIENCE
发表日期: 2015
DOI: 10.1039/c5sc00708a
卷: 6, 期:8, 页:4615-4622
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: We present the first colloidal synthesis of highly uniform single-crystalline Bi19S27Br3 nanowires (NWs) with a mean diameter of similar to 9 nm and tunable lengths in the range of 0.15-2 mm in the presence of foreign metal ions (Al3+). The Al3+ ions not only control the growth of NWs, but also achieve species transformation, i.e., from Bi2S3 to Bi19S27Br3, and are not present in the resulting NWs. This colloidal chemistry approach can be expanded to prepare a family of single-crystalline Bi19S27(Br3-x,I-x) alloyed NWs with controlled compositions (0 <= x <= 3). Interestingly, these alloyed NWs show an unusual composition-independent band gap of similar to 0.82 eV, and theoretical calculations indicate that this phenomenon comes from the very minor contributions of the halogens to the valence band maximum and conduction band minimum. The photodetectors made of Bi19S27(Br3-x,I-x) alloyed NWs show a pronounced photoresponse with high stability and reproducibility, which makes the NWs potentially useful candidates in optoelectronic devices.
关键词[WOS]: COLLOIDAL NANOCRYSTALS SYNTHESIS ;  NEAR-INFRARED PHOTODETECTORS ;  PHASE-CONTROLLED SYNTHESIS ;  AUGMENTED-WAVE METHOD ;  ORIENTED ATTACHMENT ;  CDSE NANOCRYSTALS ;  BAND-GAP ;  SEMICONDUCTOR NANOWIRES ;  CRYSTAL PHASE ;  SOLAR-CELLS
语种: 英语
WOS记录号: WOS:000357931700026
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146398
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China
3.Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China

Recommended Citation:
Wu, Yihui,Pan, Huanhuan,Zhou, Xin,et al. Shape and composition control of Bi19S27(Br3-x,I-x) alloyed nanowires: the role of metal ions[J]. CHEMICAL SCIENCE,2015,6(8):4615-4622.
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