期刊
ADVANCED FUNCTIONAL MATERIALS
卷 26, 期 19, 页码 3299-3305出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201505571
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资金
- National Natural Science Foundation of China [51222201, 51472008, 51290272, 21201012, 51121091, 51072004, 11304053, 51201069, 51290271]
- National Basic Research Program of China [2011CB921903, 2012CB921404, 2012CB933404, 2013CB932603, 2011CB933003]
- Beijing Municipal Science and Technology Planning Project [Z151100003315013]
Dendritic patterns generated in non-equilibrium growth processes are prevalent in nature while their formation mechanisms are far from fully understood. Here, we report a coverage-dependent fractal degree evolution of monolayer 2H-MoS2 dendrites synthesized on a symmetry-disparate substrate of SrTiO3 (001). Surprisingly, various characterizations have revealed that the monolayer dendrites featured with orthogonal backbones are single crystalline, possessing both peculiar adlayer-substrate interaction and abnormal indirect bandgap on SrTiO3 (001). Further theoretical calculations indicate that a prominent diffusion anisotropy of monomer precursors, combined with the disparate adlayer-substrate symmetry, determine the diffusion-limited aggregation of MoS2 towards dendritic shapes. This work provides brand-new insights in the morphological engineering of two-dimensional atomic crystals, and contributes greatly to an in-depth understanding of the detailed dynamics in non-equilibrium crystal growth.
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