نتایج جستجو برای: controlled crystallization

تعداد نتایج: 405292  

Journal: :Scientific reports 2015
Joshua J Cardiel Hirotoshi Furusho Ulf Skoglund Amy Q Shen

Crystal-like structures at nano and micron scales have promise for purification and confined reactions, and as starting points for fabricating highly ordered crystals for protein engineering and drug discovery applications. However, developing controlled crystallization techniques from batch processes remain challenging. We show that neutrally charged nanoscale spherical micelles from biocompat...

2009
Olev Vinn Kalle Kirsimäe Harry A. ten Hove

The inner tube layer of Pomatoceros americanus has a complex oriented ultrastructure, which cannot be explained by the standard granular secretion model, predicting a largely unoriented structure of the tube. In the lamello-fibrillar structure of the inner tube layer, the crystallization axis of crystals has a uniform orientation, which is not continuous through successive growth increments. Th...

Journal: :Acta crystallographica. Section D, Biological crystallography 2007
M Budayova-Spano F Dauvergne M Audiffren T Bactivelane S Cusack

A method and a device for the promotion of crystal growth by keeping the crystallization solution metastable during the growth process are described. This is achieved by controlled temperature variation of the crystallization solution using parameters determined in situ during the growth process. The technique finds application in the growth of large high-quality crystals for neutron crystallog...

2015
Makhsud I Saidaminov Ahmed L Abdelhady Banavoth Murali Erkki Alarousu Victor M Burlakov Wei Peng Ibrahim Dursun Lingfei Wang Yao He Giacomo Maculan Alain Goriely Tom Wu Omar F Mohammed Osman M Bakr

Single crystals of methylammonium lead trihalide perovskites (MAPbX3; MA = CH3NH3(+), X = Br(-) or I(-)) have shown remarkably low trap density and charge transport properties; however, growth of such high-quality semiconductors is a time-consuming process. Here we present a rapid crystal growth process to obtain MAPbX3 single crystals, an order of magnitude faster than previous reports. The pr...

Journal: :Scientific reports 2016
Chun-Wei Shi Wen-Yuan Wu Shuai Li Xue Bian Shan-Lin Zhao Ming-Yuan Pei

Using Y molecular sieve as the core, Y/SBA-15 composite molecular sieves were prepared by different crystallization methods in the paper. The growth process and morphologies of the composite molecular sieves were controlled by adjusting the synthesis factors. The structures and acidity of two kinds of composite molecular sieves were characterized by X-ray diffraction (XRD), N2 adsorption/desorp...

Journal: :Nature materials 2003
László Gránásy Tamás Pusztai James A Warren Jack F Douglas Tamás Börzsönyi Vincent Ferreiro

Microstructure plays an essential role in determining the properties of crystalline materials. A widely used method to influence microstructure is the addition of nucleating agents. Observations on films formed from clay-polymer blends indicate that particulate additives, in addition to serving as nucleating agents, may also perturb crystal growth, leading to the formation of irregular dendriti...

Journal: :Biotechnology and applied biochemistry 2011
Richard T Tran Elhum Naseri Aleksey Kolasnikov Xiaochun Bai Jian Yang

Porogen leaching is a widely used and simple technique for the creation of porous scaffolds in tissue engineering. Sodium chloride (NaCl) is the most commonly used porogen, but the current grinding and sieving methods generate salt particles with huge size variations and cannot generate porogens in the submicron size range. We have developed a facile method based on the principles of crystalliz...

2016
Simin An Jiahao Li Yang Li Shunning Li Qi Wang Baixin Liu

Crystallization processes are always accompanied by the emergence of multiple intermediate states, of which the structures and transition dynamics are far from clarity, since it is difficult to experimentally observe the microscopic pathway. To insight the structural evolution and the crystallization dynamics, we perform large-scale molecular dynamics simulations to investigate the time-depende...

Journal: :Micromachines 2015
Deyong Zhu Xiaohu Zhou Bo Zheng

This paper reports the design and construction of a plastic-glass hybrid microfluidic platform for performing protein crystallization trials in nanoliter double emulsions. The double emulsion-based protein crystallization trials were implemented with both the vapor-diffusion method and microbatch method by controlling the diffusion of water between the inner and outer phases and by eliminating ...

Journal: :The Journal of chemical physics 2016
J R Espinosa C Navarro E Sanz C Valeriani C Vega

By using the seeding technique the nucleation rate for the formation of ice at room pressure will be estimated for the TIP4P/ICE model using longer runs and a smaller grid of temperatures than in the previous work. The growth rate of ice will be determined for TIP4P/ICE and for the mW model of water. Although TIP4P/ICE and mW have a similar melting point and melting enthalpy, they differ signif...

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