Contribution of Metal Defects in the Assembly Induced Emission of Cu Nanoclusters
Mohammed, Omar F.
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
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AbstractAggregation/assembly induced emission (AIE) has been observed for metal nanoclusters (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.
CitationWu Z, Liu H, Li T, Liu J, Yin J, et al. (2017) Contribution of Metal Defects in the Assembly Induced Emission of Cu Nanoclusters. Journal of the American Chemical Society 139: 4318–4321. Available: http://dx.doi.org/10.1021/jacs.7b00773.
SponsorsThis work was supported by NSFC (51425303), the National key research and development program of China (2016YFB0401701), the 973 Program of China (2014CB643503), and the Special Project from MOST of China.
PublisherAmerican Chemical Society (ACS)