Distance makes a difference in crystalline photoluminescence
| Autor: | Xuedan Ma, Yixuan Xu, Zhongyan Wu, Xiang Wu, Zhipeng Yan, Junran Zhang, Wanmiao Gu, Yanchun Li, Jaeyong Kim, Zibao Gan, Yungui Liu, Jingwu Dong, Nan Xia, Shuqing Jiang, Lizhong He, Zhikun Wu, Lin Wang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Work (thermodynamics)
Photoluminescence Materials science Science Chemical physics General Physics and Astronomy Nanochemistry 02 engineering and technology Electron 010402 general chemistry 01 natural sciences General Biochemistry Genetics and Molecular Biology Article Nanoclusters lcsh:Science Conformational isomerism Quenching Multidisciplinary General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Optical materials Nanoparticles lcsh:Q 0210 nano-technology Excitation |
| Zdroj: | Nature Communications Nature Communications, Vol 11, Iss 1, Pp 1-10 (2020) |
| ISSN: | 2041-1723 |
| Popis: | Crystallization-induced photoluminescence weakening was recently revealed in ultrasmall metal nanoparticles. However, the fundamentals of the phenomenon are not understood yet. By obtaining conformational isomer crystals of gold nanoclusters, we investigate crystallization-induced photoluminescence weakening and reveal that the shortening of interparticle distance decreases photoluminescence, which is further supported by high-pressure photoluminescence experiments. To interpret this, we propose a distance-dependent non-radiative transfer model of excitation electrons and support it with additional theoretical and experimental results. This model can also explain both aggregation-induced quenching and aggregation-induced emission phenomena. This work improves our understanding of aggregated-state photoluminescence, contributes to the concept of conformational isomerism in nanoclusters, and demonstrates the utility of high pressure studies in nanochemistry. Crystallization-induced photoluminescence weakening in ultrasmall metal nanoparticles is not well understood. Here, the authors study conformational isomers of gold nanoclusters to examine the effect of interparticle distance on this phenomenon, and propose a model of distance-dependent non-radiative excitation electron transfer. |
| Databáze: | OpenAIRE |
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