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Single-electron charging and ultrafast dynamics of bimetallic Au144−xAgx(PET)60 nanoclusters.

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Title: Single-electron charging and ultrafast dynamics of bimetallic Au144−xAgx(PET)60 nanoclusters.
Authors: Du, Xiangsha, Ma, Hedi, Zhang, Xinwen, Zhou, Meng, Liu, Zhongyu, Wang, He, Wang, Gangli, Jin, Rongchao
Source: Nano Research; Sep2022, Vol. 15 Issue 9, p8573-8578, 6p
Abstract: Alloying is an important strategy in tailoring the functionality of materials. In metal nanoclusters (NCs), the introduction of a heterometal leads to alloy nanoclusters that often outperform the homometal ones in terms of the physical and chemical properties. In this work, a series of four M144(PET)60 alloy NCs (where, M = Au/Ag, PET = −SCH2CH2Ph) are synthesized and characterized. The silver doping into the homogold template (Au144) leads to more prominent optical absorption features in the steady-state spectrum in the visible range. Femtosecond transient absorption spectroscopy reveals the effect of Ag doping on the electronic relaxation dynamics compared to Au144 and the pump fluence independent dynamics. Electrochemical results reflect a narrowing of HOMO—LUMO gap (Eg) induced by Ag doping. A temperature dependence of the single-electron charging is also observed for the series of alloy NCs, in which the Eg values of the alloy NCs enlarge as the temperature decreases, which is characteristic of semiconducting behavior. [ABSTRACT FROM AUTHOR]
Copyright of Nano Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
ISSN: 19980124
DOI: 10.1007/s12274-022-4445-9
Database: Complementary Index
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