Support Effects on Electronic Behaviors of Gold Nanoparticles Studied by X-Ray Absorption Fine Structure

doi:10.1063/1.2644658

Title: Support Effects on Electronic Behaviors of Gold Nanoparticles Studied by X-Ray Absorption Fine Structure

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Abstract

The electronic properties of gold nanoparticles supported on different supports were studied with X-ray absorption fine structure (XAFS). It was found that the tunability of the d-electron distribution in the nano-sized Au clusters can be realized by selective supporting. The Au atoms in the clusters gain 5d electrons when supported on SiO2, and lose 5d electrons when loaded over MgO, Al2O3, and TiO2. Contractions in bond lengths of between 0.5 and 1.6% from bulk metal values were observed from EXAFS data. This work demonstrates that the important role of the different supports in the 5d-charge distribution of Au nanoparticles and usefulness of XAFS in probing the electronic behavior of noble metal nanoparticles.

Authors:

Li Zhongrui; Yan Wensheng; Wei Shiqiang ^[1]

National Synchrotron Radiation Lab, University of Science and Technology of China, Hefei 230029 (China)

Publication Date:: Fri Feb 02 00:00:00 EST 2007

OSTI Identifier:: 21054740

Resource Type:: Journal Article

Resource Relation:: Journal Name: AIP Conference Proceedings; Journal Volume: 882; Journal Issue: 1; Conference: XAFS13: 13. international conference on X-ray absorption fine structure, Stanford, CA (United States), 9-14 Jul 2006; Other Information: DOI: 10.1063/1.2644658; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; ABSORPTION SPECTRA; ABSORPTION SPECTROSCOPY; BOND LENGTHS; CHARGE DISTRIBUTION; DISTRIBUTION; ELECTRONIC STRUCTURE; ELECTRONS; FINE STRUCTURE; GOLD; MAGNESIUM OXIDES; NANOSTRUCTURES; PARTICLES; TITANIUM OXIDES; X-RAY SPECTRA; X-RAY SPECTROSCOPY

Citation Formats


                    Li Zhongrui, Yan Wensheng, and Wei Shiqiang. Support Effects on Electronic Behaviors of Gold Nanoparticles Studied by X-Ray Absorption Fine Structure.  United States: N. p., 2007. 
        Web.  doi:10.1063/1.2644658.

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                    Li Zhongrui, Yan Wensheng, & Wei Shiqiang. Support Effects on Electronic Behaviors of Gold Nanoparticles Studied by X-Ray Absorption Fine Structure.  United States.  doi:10.1063/1.2644658.

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                    Li Zhongrui, Yan Wensheng, and Wei Shiqiang. Fri .  
        "Support Effects on Electronic Behaviors of Gold Nanoparticles Studied by X-Ray Absorption Fine Structure".  United States.  
        doi:10.1063/1.2644658.

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@article{osti_21054740,

  title        = {Support Effects on Electronic Behaviors of Gold Nanoparticles Studied by X-Ray Absorption Fine Structure},

  author       = {Li Zhongrui and Yan Wensheng and Wei Shiqiang},

  abstractNote = {The electronic properties of gold nanoparticles supported on different supports were studied with X-ray absorption fine structure (XAFS). It was found that the tunability of the d-electron distribution in the nano-sized Au clusters can be realized by selective supporting. The Au atoms in the clusters gain 5d electrons when supported on SiO2, and lose 5d electrons when loaded over MgO, Al2O3, and TiO2. Contractions in bond lengths of between 0.5 and 1.6% from bulk metal values were observed from EXAFS data. This work demonstrates that the important role of the different supports in the 5d-charge distribution of Au nanoparticles and usefulness of XAFS in probing the electronic behavior of noble metal nanoparticles.},

  doi          = {10.1063/1.2644658},

  journal      = {AIP Conference Proceedings},

  number       = 1,

  volume       = 882,

  place        = {United States},

  year         = {Fri Feb 02 00:00:00 EST 2007},

  month        = {Fri Feb 02 00:00:00 EST 2007}

}

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DOI: 10.1063/1.2644658

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