Two-dimensional crystallization of hexagonal bilayer with Moiré patterns

Z. G. Chen, Z. P. Xu, M. Zhang, You Zhou, M. Liu, T. Patten, G. Y. Liu, H. Li, Xiao C Zeng, L. Tan

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Direct observation of crystallization dynamics in real space is of special interest to scientists in various disciplines. Although direct observation of transient structural transformation in a nanocrystalline system has been recently achieved using the state-of-the-art aberration-corrected transmission electron microscopy (AC-TEM), the small length scales of individual species in molecular systems still preclude routine observation of crystallization dynamics. Unidirectional packing of microbeads can serve as an experimental model system, as their dynamics can be observed and recorded readily in the laboratory due to their larger size and slower time scale. Herein, we present direct observation of a two-dimensional (2D) crystallization enabled by such a packing process. The direct imaging approach not only allows observation of the dynamics in a bead-by-bead fashion but also reveals intriguing phenomena, such as the formation of grain boundaries, disorder-order transitions, and the Moiré patterns which arise when two periodic monolayers are overlaid at certain angles. In addition, the imaging afforded by confocal microscopy facilitates a structural analysis of height-dependent polygonal tiling of the top monolayer, which has implication to the formation of 2D quasicrystals.

Original languageEnglish (US)
Pages (from-to)4363-4369
Number of pages7
JournalJournal of Physical Chemistry B
Volume116
Issue number14
DOIs
StatePublished - Apr 12 2012

Fingerprint

Crystallization
crystallization
Monolayers
beads
Imaging techniques
Quasicrystals
Order disorder transitions
Confocal microscopy
Aberrations
Structural analysis
Grain boundaries
structural analysis
aberration
Transmission electron microscopy
grain boundaries
disorders
microscopy
transmission electron microscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Chen, Z. G., Xu, Z. P., Zhang, M., Zhou, Y., Liu, M., Patten, T., ... Tan, L. (2012). Two-dimensional crystallization of hexagonal bilayer with Moiré patterns. Journal of Physical Chemistry B, 116(14), 4363-4369. https://doi.org/10.1021/jp211369r

Two-dimensional crystallization of hexagonal bilayer with Moiré patterns. / Chen, Z. G.; Xu, Z. P.; Zhang, M.; Zhou, You; Liu, M.; Patten, T.; Liu, G. Y.; Li, H.; Zeng, Xiao C; Tan, L.

In: Journal of Physical Chemistry B, Vol. 116, No. 14, 12.04.2012, p. 4363-4369.

Research output: Contribution to journalArticle

Chen, ZG, Xu, ZP, Zhang, M, Zhou, Y, Liu, M, Patten, T, Liu, GY, Li, H, Zeng, XC & Tan, L 2012, 'Two-dimensional crystallization of hexagonal bilayer with Moiré patterns', Journal of Physical Chemistry B, vol. 116, no. 14, pp. 4363-4369. https://doi.org/10.1021/jp211369r
Chen, Z. G. ; Xu, Z. P. ; Zhang, M. ; Zhou, You ; Liu, M. ; Patten, T. ; Liu, G. Y. ; Li, H. ; Zeng, Xiao C ; Tan, L. / Two-dimensional crystallization of hexagonal bilayer with Moiré patterns. In: Journal of Physical Chemistry B. 2012 ; Vol. 116, No. 14. pp. 4363-4369.
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