Control of calcium carbonate crystallization utilizing amphiphilic block copolypeptides |
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| Institution: | 1. Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106-9510, USA;2. California Nanosystems Institute, University of California, Santa Barbara, CA 93106-9510, USA;3. Materials Research Laboratory, University of California, Santa Barbara, CA 93106-5050, USA;4. Department of Biomolecular Science and Engineering, University of California, Santa Barbara, CA 93106-9611, USA;1. Crystal Growth Laboratory, Department of Physics, Erode Sengunthar Engineering College, Erode 638057, India;2. Department of Physics, Bharathiar University Arts and Science College, Modakkurichi, Erode 638104, India;1. Crystal Growth Laboratory, Department of Physics, Erode Sengunthar Engineering College, Erode 638057, Tamil Nadu, India;2. Department of Physics, Bharathiar University Arts and Science College, Modakurichi 638104, Tamil Nadu, India;1. Université de Toulouse; Mines Albi, UMR CNRS 5302, Centre RAPSODEE; Campus Jarlard, F-81013 Albi cedex 09, France;2. Université de Toulouse; INP-ENSIACET, LCA, 310130 Toulouse, France;3. INRA; UMR 1010 CAI, 310130 Toulouse, France;1. Department of Applied Chemistry and Biochemical Engineering, Faculty of Engineering, Shizuoka University, 3-5-1, Johoku, Naka-ku, Hamamatsu, Shizuoka, 432-8561, Japan;2. School of Bioscience and Biotechnology, Tokyo University of Technology, 1404 Katakura-machi, Hachioji, Tokyo, 192-0982, Japan |
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| Abstract: | Control over the morphology of calcium carbonate (CaCO3) crystals has been achieved through the use of anionic, amphiphilic block copolypeptides during crystallization. Microspheres of CaCO3 can be synthesized by the introduction of preformed organic, amphiphilic block copolypeptide templates, poly(l-aspartate sodium salt)100-block-poly(l-phenylalanine)25-random-(l-leucine)25] (1) and poly(l-glutamate sodium salt)100-block-poly(l-phenylalanine)25-random-(l-leucine)25] (2). When cationic amphiphiles are used in lieu of the anionic amphiphiles, only CaCO3 rhombohedra are produced. The self-assembling amphiphile controls the precipitation of the microspheres by acting as a template to form giant CaCO3 microspheres. These microspheres are composed of nanocrystals ranging in size from 10 to 60 nm using 1 and 20 to 100 nm using 2. |
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