Title The merging mechanisms of poly(3-hexylthiophene) domains revealed through scanning tunneling microscopy and molecular dynamics simulations
Date 16.03.2020
Number 58326
Abstract Herein, we in situ track the merging processes of poly(3-hexylthiophene) (P3HT) domains physisorbed onto graphite while keeping the domain structures clearly resolved through scanning tunneling microscopy (STM). The domain shape-fixed, amoeba/worm-like and bridge-mediated merging mechanisms are revealed. In the domain shape-fixed diffusion, the moving domains obey the principle of the non-continuous random walks. Both diffusive and ballistic-like dynamics are disclosed. Additionally, the asymmetrical domains may show anisotropic movements. In the amoeba-like style, the pseudopodia are formed and changed stochastically while in the worm-like style two permanent parts (head and body) of the domains are formed prior movement and kept fixed in the motions. Finally, the integration of two domains is called a bridge-mediated one, if a small domain is bound to a bigger one directly through a dynamic bridge. The molecular dynamics simulations support the experimental findings of P3HT domain movements and rotations on the graphite surface.
Publisher Polymer
Citation Polymer 191 (2020) 122266
Authors Li, J.-K. ; Shao, M.Y. ; Yang, Z.Y. ; Guskova, O.

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