Near-infrared luminescence from small gold nanocrystals

被引：262

作者：

Bigioni, TP

Whetten, RL ^{[1
]}

Dag, Ö

机构：

[1] Georgia Inst Technol, Sch Phys & Chem, Atlanta, GA 30332 USA

[2] Univ Toronto, Dept Chem, Toronto, ON M5S 1A1, Canada

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 30期

关键词：

D O I：

10.1021/jp993867w

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A novel photoluminescence is reported for small metal nanocrystals in the near-infrared region (1.1-1.6 mu m). Near-infrared photoluminescence spectra were measured at room temperature for 1.1 and 1.7 nm Au nanocrystals using a 1.06 mu m excitation source. This photoluminescence is attributed to sp to sp-like transitions, analogous to intraband transitions in bulk gold; however, the exact mechanism is unknown. A conservative estimate for the quantum yield for the 1.7 nm gold nanocrystals is (4.4 +/- 1.5) x 10(-5) at room temperature, more than 5 orders of magnitude greater than that of bulk gold.

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收藏

页码：6983 / 6986

页数：4

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