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Citation: Li Jian-Chang, Xue Zeng-Quan, Zhang Hao, Zeng Yan, Liu Wei-Min, Wu Quan-De. Chiral Fractal Patterns of TCNQ Thin Films Grown by Vacuum Evaporation[J]. Acta Physico-Chimica Sinica, ;2000, 16(07): 579-582. doi: 10.3866/PKU.WHXB20000701 shu

Chiral Fractal Patterns of TCNQ Thin Films Grown by Vacuum Evaporation

1.
Department of Electronics,Peking University,Beijing 100871

Received Date: 7 March 2000
Available Online: 15 July 2000

The unique two dimensional chiral “seahorse”-like fractal aggregates of pure tetra-cyanoquinodimethane (TCNQ) and PANI TCNQ complex thin films, deposited by vacuum evaporation, were observed and reported. The influence of some experimental factors, such as electrostatic field, substrates and deposition rate, on the fractal pattern formation was discussed in detail. It was found that the electrostatic effects, induced by charged particles, do not play a crucial role in the pattern growth process. We suggest that the key to the formation of the patterns lies in the special molecular structure and the unique process of the crystal growth of TCNQ thin films, and a new growth model was proposed.
- Thin film,
- TCNQ,
- PANI,
- Fractal
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