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Crystallization from Thin Films on a Hot Plate: A New Approach of Solid Surface Pattering
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作者 Ion Sandu Iuliana Urzica +3 位作者 Marius Dumitru Ana Maria Banici claudiu teodor fleaca Florian Dumitrache 《Journal of Materials Science and Chemical Engineering》 2019年第12期9-18,共10页
The sacrificial polymeric template usually used in lithographic methods could be replaced by crystalline materials such as ionic salts which, in some special conditions, can form arrays of single crystals. Atomic forc... The sacrificial polymeric template usually used in lithographic methods could be replaced by crystalline materials such as ionic salts which, in some special conditions, can form arrays of single crystals. Atomic force microscopy investigations performed on such samples show their regularity and nanometric thickness. They can serve as a part of an ionic/molecular crystal grid or as mask in crystal lithography. Alternating the polarity degree of the employed solvents/dispersing media by matching materials qualities, we fabricated a sodium chromate and sulphur crystalline net, iron oxide nanoparticle grid and a sulphur single crystal array. The lack of any expensive/sophisticated technology in the production process of final devices makes this approach attractive. 展开更多
关键词 DENDRITES INTERFACES Low DIMENSIONAL Structures Surface PROCESSES
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The Influence of Gravity on Single Crystallization in Large Volume Drops
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作者 Ion Sandu Iuliana Iordache +2 位作者 claudiu teodor fleaca Florian Dumitrache Ana Maria Niculescu 《Journal of Crystallization Process and Technology》 2014年第4期206-211,共6页
The chemical, physical, and biological properties of more than two millions of proteins which follow to be synthesized by Pharmaceutical Industry, can be anticipated (by using their XRD diffrac-tograms) if they will b... The chemical, physical, and biological properties of more than two millions of proteins which follow to be synthesized by Pharmaceutical Industry, can be anticipated (by using their XRD diffrac-tograms) if they will be grown from aqueous drops as high quality, large volume single-crystals. This is not a simple task and usually the growing process is seen as art rather than a science. The growing is expensive, time consuming, and finally an amorphous aggregate may result instead one single-crystal. In this article, we show for the first time how one single crystal can be grown in large volume hanging drops through their fast evaporation. The single nucleation is determined by choosing the proper sense of gravitational force relative to the drop triple line contact. In a special configuration, single-crystals of glycine and threonine were rapidly grown. 展开更多
关键词 Single NUCLEATION DROP EVAPORATION Protein Crystallization Triple Line Contact Interface GRAVITY
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