Fluorescence signals of core–shell quantum dots enhanced by single crystalline gold caps on silicon nanowires
作者： S H Christiansen , J W Chou , M Becker , V Sivakov , K Ehrhold
DOI: 10.1088/0957-4484/20/16/165301
关键词:
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 fluorescence photoluminescence (PL) signals of highly dilute core/shell CdSeTe/ZnS quantum dots (QDs) aqueous solution (10−5 M). For NWs without Au-caps, as they appear, for example, after Au etching aqua regia or buffered KI/I2-solution, essentially no signal same diluted QDs could be observed. Fluorescence PL were measured using excitation with a laser wavelength 633 nm. The enhancement crystalline, Au-caps is discussed and interpreted based finite element modeling (FEM).
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