Tuning Optical Absorption and Emission of Sub-Nanometer Gold-Caged Metal Systems M@Au₁₄ by Substitutional Doping

Authors: Xie, John R.H.; Cheung, Chiu Fung; Zhao, Jijun

Source: Journal of Computational and Theoretical Nanoscience, Volume 3, Number 2, April 2006 , pp. 312-314(3)

Publisher: American Scientific Publishers

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Abstract:

Gao, Bulusu and Zeng have recently reported a new series of isoelectronic, sub-nanometer gold-caged metal systems M@Au₁₄ which have large energy gaps than icosahedral W@Au₁₂ and Au₃₂ and tetrahedral Au₂₀. In this communication, we propose a "tuning" scheme, substitutional-doping, to achieve the tunable optical excitation and emission of M@Au₁₄ over a broad wavelength region. For example, the optical absorption gaps of isoelectronic M@Au₁₄ could be tuned from the near infrared to green by substituting the metal M with group IIIB, IVB, and VB constituents in the periodic table. Our results provide basic guidelines for further experimental studies on the spectral properties of M@Au₁₄ as well as for the development of M@Au₁₄-based tunable optoelectronic devices.

Keywords: NANOCLUSTER; GOLD; UV-VIS; OPTICAL GAP; FLUORESCENCE; EMISSION; EXCITATION; ABSORPTION; SUBSTITUTIONAL DOPING; OPTOELECTRONICS

Document Type: Short communication

DOI: http://dx.doi.org/10.1166/jctn.2006.015

Publication date: 2006-04-01

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Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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