Near-infrared luminescence from small gold nanocrystals

T. P. Bigioni; R. L. Whetten; Ö Dag

doi:10.1021/jp993867w

Near-infrared luminescence from small gold nanocrystals

T. P. Bigioni, R. L. Whetten, Ö Dag

Research output: Contribution to journal › Article › peer-review

284 Scopus citations

Abstract

A novel photoluminescence is reported for small metal nanocrystals in the near-infrared region (1.1-1.6 μm). Near-infrared photoluminescence spectra were measured at room temperature for 1.1 and 1.7 nm Au nanocrystals using a 1.06 μm 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) × 10^-5 at room temperature, more than 5 orders of magnitude greater than that of bulk gold.

Original language	English (US)
Pages (from-to)	6983-6986
Number of pages	4
Journal	Journal of Physical Chemistry B
Volume	104
Issue number	30
DOIs	https://doi.org/10.1021/jp993867w
State	Published - Aug 3 2000
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "Near-infrared luminescence from small gold nanocrystals",

abstract = "A novel photoluminescence is reported for small metal nanocrystals in the near-infrared region (1.1-1.6 μm). Near-infrared photoluminescence spectra were measured at room temperature for 1.1 and 1.7 nm Au nanocrystals using a 1.06 μm 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) × 10-5 at room temperature, more than 5 orders of magnitude greater than that of bulk gold.",

author = "Bigioni, {T. P.} and Whetten, {R. L.} and {\"O} Dag",

year = "2000",

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doi = "10.1021/jp993867w",

language = "English (US)",

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journal = "Journal of Physical Chemistry B",

issn = "1520-6106",

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T1 - Near-infrared luminescence from small gold nanocrystals

AU - Bigioni, T. P.

AU - Whetten, R. L.

AU - Dag, Ö

PY - 2000/8/3

Y1 - 2000/8/3

N2 - A novel photoluminescence is reported for small metal nanocrystals in the near-infrared region (1.1-1.6 μm). Near-infrared photoluminescence spectra were measured at room temperature for 1.1 and 1.7 nm Au nanocrystals using a 1.06 μm 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) × 10-5 at room temperature, more than 5 orders of magnitude greater than that of bulk gold.

AB - A novel photoluminescence is reported for small metal nanocrystals in the near-infrared region (1.1-1.6 μm). Near-infrared photoluminescence spectra were measured at room temperature for 1.1 and 1.7 nm Au nanocrystals using a 1.06 μm 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) × 10-5 at room temperature, more than 5 orders of magnitude greater than that of bulk gold.

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DO - 10.1021/jp993867w

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JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 30

ER -

Near-infrared luminescence from small gold nanocrystals

Abstract

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