Monolayer MoS2 Dendrites on a Symmetry-Disparate SrTiO3 (001) Substrate: Formation Mechanism and Interface Interaction

Yu Zhang, Qingqing Ji, Jinxiu Wen, Jiu Li, Cong Li, Jianping Shi, Xiebo Zhou, Kebin Shi, Huanjun Chen*, Yuanchang Li, Shaozhi Deng, Ningsheng Xu, Zhongfan Liu, Yanfeng Zhang

*Corresponding author for this work

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Abstract

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.

Original languageEnglish
Pages (from-to)3299-3305
Number of pages7
JournalAdvanced Functional Materials
Volume26
Issue number19
DOIs
Publication statusPublished - 17 May 2016
Externally publishedYes

Keywords

  • chemical vapor deposition
  • dendritic growth
  • diffusion-limited aggregation
  • molybdenum disulfide
  • monolayer

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Zhang, Y., Ji, Q., Wen, J., Li, J., Li, C., Shi, J., Zhou, X., Shi, K., Chen, H., Li, Y., Deng, S., Xu, N., Liu, Z., & Zhang, Y. (2016). Monolayer MoS2 Dendrites on a Symmetry-Disparate SrTiO3 (001) Substrate: Formation Mechanism and Interface Interaction. Advanced Functional Materials, 26(19), 3299-3305. https://doi.org/10.1002/adfm.201505571