Single Nanowire Extinction Spectroscopy

被引:53
作者
Giblin, Jay [1 ]
Vietmeyer, Felix [1 ]
McDonald, Matthew P. [1 ]
Kuno, Masaru [1 ]
机构
[1] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA
关键词
CdSe nanowires; six-band effective mass model; spatial modulation; single molecule detection; dielectric contrast; excitons; QUANTUM-WELL WIRES; ROOM-TEMPERATURE; OPTICAL-ABSORPTION; CADMIUM TELLURIDE; CDSE NANOWIRES; DOTS; SPECTRA; PHOTOLUMINESCENCE; CONFINEMENT; DEPENDENCE;
D O I
10.1021/nl201679d
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Here we show the first direct extinction spectra of single one-dimensional (1D) semiconductor nanostructures obtained at room temperature utilizing a spatial modulation approach.(1) For these materials, ensemble averaging in conventional extinction spectroscopy has limited our understanding of the interplay between carrier confinement and their electrostatic interactions.(2-4) By probing individual CdSe nanowires (NWs), we have identified and assigned size-dependent exciton transitions occurring across the visible. In turn, we have revealed the existence of room temperature 1D excitons in the narrowest NWs.
引用
收藏
页码:3307 / 3311
页数:5
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