Atomic structure of au nanoparticles on a silica support by an X-ray PDF study

Wojtek Dmowski; Hongfeng Yin; Sheng Dai; Steven H. Overbury; Takeshi Egami

doi:10.1021/jp100443z

Atomic structure of au nanoparticles on a silica support by an X-ray PDF study

Wojtek Dmowski, Hongfeng Yin, Sheng Dai, Steven H. Overbury, Takeshi Egami

Chemical Sciences Division

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

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Abstract

We investigated the atomic structure of gold nanoparticles with an average size of ∼5 nm in diameter, supported by silica. We used high-energy X-ray diffraction and the atomic pair distribution function (PDF) to probe the loal atomic structure. Measurements were performed from 25 to 950 °C. The structure is approximately fcc in average but exhibits small distortions. The structural distortion increases with the temperature and could be related to the catalytic activity of gold nanoparticles. Above 425 °C, rapid particle growth and coalescence were observed.

Original language	English
Pages (from-to)	6983-6988
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	114
Issue number	15
DOIs	https://doi.org/10.1021/jp100443z
State	Published - Apr 22 2010

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abstract = "We investigated the atomic structure of gold nanoparticles with an average size of ∼5 nm in diameter, supported by silica. We used high-energy X-ray diffraction and the atomic pair distribution function (PDF) to probe the loal atomic structure. Measurements were performed from 25 to 950 °C. The structure is approximately fcc in average but exhibits small distortions. The structural distortion increases with the temperature and could be related to the catalytic activity of gold nanoparticles. Above 425 °C, rapid particle growth and coalescence were observed.",

author = "Wojtek Dmowski and Hongfeng Yin and Sheng Dai and Overbury, {Steven H.} and Takeshi Egami",

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AU - Dmowski, Wojtek

AU - Yin, Hongfeng

AU - Dai, Sheng

AU - Overbury, Steven H.

AU - Egami, Takeshi

PY - 2010/4/22

Y1 - 2010/4/22

N2 - We investigated the atomic structure of gold nanoparticles with an average size of ∼5 nm in diameter, supported by silica. We used high-energy X-ray diffraction and the atomic pair distribution function (PDF) to probe the loal atomic structure. Measurements were performed from 25 to 950 °C. The structure is approximately fcc in average but exhibits small distortions. The structural distortion increases with the temperature and could be related to the catalytic activity of gold nanoparticles. Above 425 °C, rapid particle growth and coalescence were observed.

AB - We investigated the atomic structure of gold nanoparticles with an average size of ∼5 nm in diameter, supported by silica. We used high-energy X-ray diffraction and the atomic pair distribution function (PDF) to probe the loal atomic structure. Measurements were performed from 25 to 950 °C. The structure is approximately fcc in average but exhibits small distortions. The structural distortion increases with the temperature and could be related to the catalytic activity of gold nanoparticles. Above 425 °C, rapid particle growth and coalescence were observed.

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U2 - 10.1021/jp100443z

DO - 10.1021/jp100443z

M3 - Article

AN - SCOPUS:77951128749

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SP - 6983

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JO - Journal of Physical Chemistry C

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IS - 15

ER -

Atomic structure of au nanoparticles on a silica support by an X-ray PDF study

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