The diffraction behavior of crystalline colloidal arrays formed by poly(styrene-co-sodium styrenesulfonate) particles

作者：Ni, Caihua^*; Wang, Ruili; Bazin, Gwenaelle; Gong, Xiangjun; Waterhouse, Geoffrey I. N.; Soldera, Armand; Zhu, X. X.^*

来源：ARKIVOC, 2021, 59-68.

DOI：10.24820/ark.5550190.p011.506

• Crystalline colloidal array
• colloidal particles
• Bragg diffraction

Colloidal particles were prepared by the surfactant-free emulsion copolymerization of styrene and sodium styrene sulfonate crosslinked with divinyl benzene. The mono-dispersed and highly surface-charged spherical particles self-assembled into three-dimensional crystalline colloidal arrays (CCA) in water. The CCA showed Bragg diffraction in the visible light wavelength range. Two diffraction peaks were observed in the range of 350(similar to)1000 nm for the CCAs at various particle concentrations. The two peaks shifted to longer wavelengths upon dilution of the colloids corresponding to increasing inter-particle distance. The red shift was accompanied by a gradual decrease in the intensity for the diffraction peak at the lower wavelength and an increase in the intensity of the peak at the higher wavelength. @@@ [GRAPHICS]

• 单位
  1; 南开大学