Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 542, Issue -, Pages 243-252Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.02.014
Keywords
Hybrid materials; Polypeptide; Mesoporous silica; Biomineralization; Chain conformation; beta-sheet; Fibrils
Categories
Funding
- Ministry of Science and Technology, Taiwan [MOST 107-2221-E-006-089, 106-2221-E-006-206]
- Hierarchical Green-Energy Materials (Hi-GEM) Research Center, from The Featured Areas Research Center Program
- Ministry of Science and Technology in Taiwan [MOST 107-3017-F-006-003]
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Biomimetic synthesis of silica/polymer hybrid nanomaterials inspired by silica-condensing microorganisms has gained significant advances in recent years and the as-prepared hybrid materials have been explored for a variety of applications. In this work, silica/polypeptide hybrid nanoparticles (NPs) and coating films can be facilely fabricated by silica mineralization of poly(L-lysine)-block-poly(L-threonine)/poly(L-glutamic acid) (PLL-b-PLT/PGA) fibril complexes assembled in solutions or on substrates at benign conditions. The experimental data revealed that PLL-b-PLT can self-assemble to form fibrils via intermolecular hydrogen bonding interactions between PLT chains and, upon complexing with PGA, silicas were efficiently mineralized in both the sheet-like PLL/PGA complexes and PLT domains, resulting in the fabrication of silica/polypeptide hybrid materials. After removing the polypeptides, mesoporous silicas exhibiting pore size between 2 and 10 nm and large pores (>10 nm) were fabricated by the replication of the sheet-like polypeptides and fibril complexes/aggregates, respectively. This study demonstrates that these polypeptide fibril complexes can serve both as nucleating agents and as templates for the fabrication of oxide/polypeptide hybrid NPs, mesoporous oxides and oxide/polypeptide coating films, which have potential applications in a variety of areas. (C) 2019 Elsevier Inc. All rights reserved.
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