Biosilicification Templated by Amphiphilic Block Copolypeptide Assemblies
Xia, Lin; Liu, Yu; Li, Zhibo
AbstractAn amphiphilic poly(L-lysine.HBr)-block-poly(L-leucine) (KL) diblock copolypeptide and its supramolecular assembly are used as a template to direct silica formation, which proceeds by a cooperative process involving biomimetic mineralization and copolypetide reassembly under ambient conditions. Various silica structures can be obtained by using different counterions, changing the chain length of the KL diblocks, and applying a sol-gel mineralization method. We find that the chain length of the KL diblock is an important factor in terms of controlling biosilica morphologies. We also find that the nature of the counterions strongly affects the resulting silica structures. For the same KL diblock, variation of anions from phosphate to sulfate and to carbonate can produce hexagonal silica platelets, silica rods, and fused silica platelets, respectively. In contrast, application of a sol-gel method can replicate the copolypeptide fibril network morphology in water, while employment of ultrasonication to the sol-gel medium transforms the silica fibrils to rigid silica rods. The resulting silica morphology has been systematically characterized using SEM and TEM, and the polypeptide conformation is explored using FT-IR and CD spectroscopy.
KeywordAmphiphiles Biomimetics Biomineralization Diblock Copolymers Morphology Self-assembly
Indexed BySCI
WOS IDWOS:000285313000019
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Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLi, Zhibo
AffiliationChinese Acad Sci, BNLMS, Inst Chem, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Xia, Lin,Liu, Yu,Li, Zhibo. Biosilicification Templated by Amphiphilic Block Copolypeptide Assemblies[J]. MACROMOLECULAR BIOSCIENCE,2010,10(12):1566-1575.
APA Xia, Lin,Liu, Yu,&Li, Zhibo.(2010).Biosilicification Templated by Amphiphilic Block Copolypeptide Assemblies.MACROMOLECULAR BIOSCIENCE,10(12),1566-1575.
MLA Xia, Lin,et al."Biosilicification Templated by Amphiphilic Block Copolypeptide Assemblies".MACROMOLECULAR BIOSCIENCE 10.12(2010):1566-1575.
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