Expanding the Spectral Tunability of Plasmonic Resonances in Doped Metal-Oxide Nanocrystals through Cooperative Cation鈥揂nion Codoping

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• 作者：Xingchen Ye ; Jiayang Fei ; Benjamin T. Diroll ; Taejong Paik ; Christopher B. Murray
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：August 20, 2014
• 年：2014
• 卷：136
• 期：33
• 页码：11680-11686
• 全文大小：528K
• ISSN：1520-5126

文摘

We present a generalized cation鈥揳nion codoping methodology for the synthesis of monodisperse, doped metal-oxide nanocrystals (NCs) that exhibit near-infrared localized surface plasmon resonance (LSPR) with the highest reported quality factors. We demonstrate that, in addition to the use of common cation dopants, the incorporation of fluorine into the lattice as an anion dopant can further increase the free-carrier concentration within individual NCs; this supports the cooperative effects of mixed cation鈥揳nion doping in shifting the LSPR to higher energies. As a result, this method allows the LSPR of doped metal-oxide NCs to become tunable across a significantly broader wavelength range (1.5鈥?.3 渭m), circumventing the prior limitations on the highest possible LSPR energies associated with single-element doping for a given oxide host. The strategy of cation鈥揳nion codoping can offer new possibilities for the chemical design of doped semiconductor and metal-oxide NCs with tailored LSPR characteristics.