期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 139, 期 12, 页码 4318-4321出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b00773
关键词
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资金
- NSFC [51425303]
- National key research and development program of China [2016YFB0401701]
- 973 Program of China [2014CB643503]
- Special Project from MOST of China
Aggregation/assembly induced emission (AIE) has been observed for metal nanodustets (NCs), but the origin of the enhanced emission is not fully understood, yet. In this work, the significant contribution of metal defects on AIE is revealed by engineering the self assembly process of Cu NCs using ethanol. The presence of ethanol leads to a rapid assembly of NCs into ultrathin nanosheets, promoting the formation of metal defects-rich surface. Detailed studies and computer simulation confirm that the metal defects-rich nanosheets possess increased Cu(I)-to-Cu(0) ratio, which greatly influences ligand-to-metal metal charge transfer and therewith facilitates the radiative relaxation of excitons. Consequently, the Cu NCs self-assembly nanosheets exhibit obvious emission enhancement.
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