The study on size dependent dipole–dipole interaction in the self-assembly of twisting nanoribbons with circular polarization activation
| Autor: | Yun Li, Bin Lv, Ziran Ye, Chenghua Ma, Junwen Zhu, Yi Shi, Pinggen Cai, Qiang Lin, Guo-Feng Cheng, Xiaoshan Wu, Bo Yan, Chenghua Sui, Fan Gao |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Nanoparticle Computer Science::Computation and Language (Computational Linguistics and Natural Language and Speech Processing) Bioengineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Electrostatics 01 natural sciences Molecular physics Cadmium telluride photovoltaics 0104 chemical sciences Dipole Semiconductor Mechanics of Materials Dispersion (optics) General Materials Science Irradiation Electrical and Electronic Engineering 0210 nano-technology business Circular polarization |
| Zdroj: | Nanotechnology. 30:385602 |
| ISSN: | 1361-6528 0957-4484 |
| Popis: | The mechanism of self-assembling process of inorganic nanoparticle (NPs) is still an open question due to the various and non-additive interactions between NPs. Kotov et al reported that the semiconductor NPs can be self-assembled by external activation such as irradiation. In this paper, the twisted CdTe nanoribbons were successfully assembled with circular polar light activation based on the chiral selective resonance absorption. The effect of NP size on the morphology of assemblies under circular polar light irradiation is discussed by introducing a new mechanism of photooxidation induced dipole moment which decreases with increasing sizes of the NPs because of the change of band offsets at the CdS/CdTe interface. Moreover, we find that the competition between the dipole-dipole interaction and electrostatic repulsion can be modulated by the size of the NPs and the concentration of dispersion, which are the key points to produce the chiral twisted nanoribbons. |
| Databáze: | OpenAIRE |
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