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- Jie Zheng
- School of Chemistry and Biochemistry, and The Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332–0400;, ,
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- Philip R. Nicovich
- School of Chemistry and Biochemistry, and The Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332–0400;, ,
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- Robert M. Dickson
- School of Chemistry and Biochemistry, and The Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332–0400;, ,
書誌事項
- 公開日
- 2007-05-01
- DOI
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- 10.1146/annurev.physchem.58.032806.104546
- 公開者
- Annual Reviews
この論文をさがす
説明
<jats:p> Highly fluorescent, water-soluble, few-atom noble-metal quantum dots have been created that behave as multielectron artificial atoms with discrete, size-tunable electronic transitions throughout the visible and near infrared. These molecular metals exhibit highly polarizable transitions and scale in size according to the simple relation E<jats:sub>Fermi</jats:sub>/N<jats:sup>1/3</jats:sup>, predicted by the free-electron model of metallic behavior. This simple scaling indicates that fluorescence arises from intraband transitions of free electrons, and these conduction-electron transitions are the low-number limit of the plasmon—the collective dipole oscillations occurring when a continuous density of states is reached. Providing the missing link between atomic and nanoparticle behavior in noble metals, these emissive, water-soluble Au nanoclusters open new opportunities for biological labels, energy-transfer pairs, and light-emitting sources in nanoscale optoelectronics. </jats:p>
収録刊行物
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- Annual Review of Physical Chemistry
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Annual Review of Physical Chemistry 58 (1), 409-431, 2007-05-01
Annual Reviews