Crystallization of microdroplets of molten alloys could, in principle, present a number of possible morphological outcomes, depending on the symmetry of the propagating solidification front and its velocity, such as axial or spherically symmetric species segregation. However, because of thermal or constitutional supercooling, resulting droplets often only display dendritic morphologies. Here we...

The development of low volume, high throughput platforms for screening and manipulating protein crystallization has been driven, in part, by the importance of understanding protein structurefunction relations. Recently, significant attention has been directed to design protein crystals as higher efficiency catalytic materials1 and to use crystalline proteins for controlled protein/drug delivery...

in this study, the effect of recrystallization of naproxen in the presence of hydroxypropyl cellulose (hpc) on the release rate of drug was investigated. crystals were generated by the anti-solvent approach using the hpc solution in water as the anti-solvent. the samples were subjected to various physicochemical evaluations such as crystal size, scanning electron microscopy, fourier transform i...

High-resolution structural data of membrane proteins can be obtained by studying 2D crystals by electron crystallography. Finding the right conditions to produce these crystals is one of the major bottlenecks encountered in 2D crystallography. Many reviews address 2D crystallization techniques in attempts to provide guidelines for crystallographers. Several techniques including new approaches t...

Crystallization is of great importance in fields as diverse as atmospheric chemistry and the pharmaceutical industry. It starts with nucleation, the formation of a microscopic crystal. Here we study, via computer simulation, the heterogeneous nucleation of a crystal in wedge-shaped grooves in a surface. We find that nucleation in these grooves is many orders of magnitude faster than on a flat s...

Coassembled molecular structures are known to exhibit a large variety of geometries and morphologies. A grand challenge of self-assembly design is to find techniques to control the crystal symmetries and overall morphologies of multicomponent systems. By mixing +3 and -1 ionic amphiphiles, we assemble crystalline ionic bilayers in a large variety of geometries that resemble polyhedral cellular ...

Zeolites A and X were co-crystallized in controlled ratios from one synthesis gel. With increasing potassium content of the synthesis gel or increasing proportion of Na-Y seeds in a mixture of Na-Y and Na-A seeds, the ratio of zeolite X to zeolite A in the synthesis product increased.

WO3 films were obtained via evaporation-induced self-assembly (EISA) using ionic surfactants such as long-chain ionic liquids 1-hexadecyl-3-methyl imidazolium chloride and bromide (C16mimCl and C16mimBr, respectively) and cetyltrimethylammonium chloride and bromide (CTAC and CTAB, respectively) as additives. Owing to the presence of the ionic surfactants, WO3 films crystallize in a preferred or...

Organic semiconductors including rubrene, Alq3, copper phthalocyanine and pentacene are crystallized by the eutectic melt crystallization. Those organic semiconductors form good eutectic systems with the various volatile crystallizable additives such as benzoic acid, salicylic acid, naphthalene and 1,3,5-trichlorobenzene. Due to the formation of the eutectic system, organic semiconductors havin...