Particle shape effects in colloidal crystals and colloidal liquid crystals: Small-angle X-ray scattering studies with microradian resolution. Issue 4 (August 2015)

• Record Type: Journal Article
• Authors: Petukhov, Andrei V.; Meijer, Janne-Mieke; Vroege, Gert Jan
• Is Part Of: Current opinion in colloid & interface science. Volume 20:Issue 4(2015)
• Page Start: 272
• Page End: 281
• Publication Date: 2015-08
• Subjects: Colloidal crystal -- Colloidal liquid crystal -- Small-angle X-ray -- Scattering -- Microradian resolution -- Anisotropic colloids; Surface chemistry -- Periodicals; Colloids -- Periodicals; 541.33
• DOI: 10.1016/j.cocis.2015.09.003
• Languages: English
• ISSNs: 1359-0294

Abstract

Abstract: Small-angle X-ray scattering (SAXS) is an indispensable tool in structural investigations of self-assembled colloidal crystals and colloidal liquid crystals. This paper reviews recent studies of the particle shape effects on the crystal structure as revealed by SAXS. Rod-like, plate-like, biaxial board-like as well as cubic-like shapes are discussed. Since relatively large, (sub)micron particles are often used in these studies, we describe the principles of the microradian X-ray diffraction technique that allows detailed characterisation of the periodic order including the determination of the intrinsic width of the Bragg peaks. Graphical abstract: Highlights: The structure of colloidal crystals can be affected by the shape of the particles. Highly anisometric colloids yield a rich variety of liquid crystalline phases. Small-angle X-ray scattering is an excellent tool to unravel colloidal structures. Microradian resolution can be achieved using compound refractive optics. SAXS must be further promoted in the colloid community.