期刊
LANGMUIR
卷 25, 期 22, 页码 13238-13243出版社
AMER CHEMICAL SOC
DOI: 10.1021/la901913d
关键词
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资金
- National Natural Science Foundation of China [20874060, 50503012, 50772067, 20606011]
- National Basic Research Program [2007CB808000]
- Basic Research Foundation [07DJ14004]
- Shanghai Science and Technique Committee
- Shanghai Leading Academic Discipline Project [13202]
The novel calcium carbonate (CaCO3) morphology, twin-sphere with an equatorial girdle, has been obtained under the control of poly(L-lysine) (PLys) through gas-diffusion method. The effect of the concentration of calcium cation and PLys, the reaction time, and the initial pH value are investigated, and various interesting morphologies, including twinsphere, discus-like, hexagonal plate, and hallow structure are observed by using scanning electronic microscopy. Laser microscopic Raman spectroscopy studies indicated that all these CaCO3 are vaterite. A possible mechanism is suggested to explain the formation of the twin-sphere based morphologies according to the results. It is proven that alkaline polypeptides can control the mineralization of CaCO3 precisely as the reported acidic polypeptides and double hydrophilic block copolymers.
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