Preparation of free-standing two-dimensional colloidal crystal arrays
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A simple method was developed to prepare ultra-thin, large-area, free-standing two-dimensional (2D) polymethylmethacrylate (PMMA) colloidal crystal array monolayers by assembling PMMA colloids suspended in toluene on water surface. Diffraction of the free-standing films could be adjusted through the particle size or operation time.
KeywordsTwo-dimensional colloidal crystal Free-standing Self-assembly
We acknowledge funding from the National Natural Science Foundation of China (Grant No. 21375009).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no competing interests.
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