Fluorescence signals of core-shell quantum dots enhanced by single crystalline gold caps on silicon nanowires

被引：6

作者：

Christiansen, S. H. ^{[1
,2
]}

Chou, J. W. ^{[1
,3
]}

Becker, M. ^{[1
,2
]}

Sivakov, V. ^{[1
,2
]}

Ehrhold, K. ^{[1
]}

Berger, A. ^{[1
,2
]}

Chou, W. C. ^{[3
]}

Chuu, D. S. ^{[3
]}

Goesele, U. ^{[1
]}

机构：

[1] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany

[2] IPHT, D-07745 Jena, Germany

[3] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30050, Taiwan

来源：

NANOTECHNOLOGY | 2009年 / 20卷 / 16期

关键词：

ELECTRON-BEAM EVAPORATION; RESONANCE ENERGY-TRANSFER; LIQUID-SOLID GROWTH; SEMICONDUCTOR NANOCRYSTALS; SILVER NANOPARTICLES; LUMINESCENCE; INTERBAND; DONORS; MODEL; SIZE;

D O I：

10.1088/0957-4484/20/16/165301

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We use nanoscale (20-300 nm in diameter) single crystalline gold (Au)-caps on silicon nanowires (NWs) grown by the vapor-liquid-solid (VLS) growth mechanism to enhance the fluorescence photoluminescence (PL) signals of highly dilute core/shell CdSeTe/ZnS quantum dots (QDs) in aqueous solution (10(-5) M). For NWs without Au-caps, as they appear, for example, after Au etching in aqua regia or buffered KI/I-2-solution, essentially no fluorescence signal of the same diluted QDs could be observed. Fluorescence PL signals were measured using excitation with a laser wavelength of 633 nm. The signal enhancement by single crystalline, nanoscale Au-caps is discussed and interpreted based on finite element modeling (FEM).

引用

页数：9

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