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- W2003780512 abstract "We describe the self-assembly of A–B–A triblock copolymers in thin films composed of a soft polydimethylsiloxane (PDMS) central block (B) and two polypeptidic (A) blocks, poly(γ-benzyl)-l-glutamate (PBLG). The PBLG segment exhibits depending on the chain length two distinct secondary conformations either a β-sheet or a α-helical conformation. The direct relationship between the surface morphology and the secondary conformation of the polypeptide segment has been evidenced by atomic force microscopy. For chain lengths below 20 U the polypeptide segments adopt preferentially a β-sheet secondary structure and the triblock copolymer self-assembled in fibers. Moreover, the fiber diameters increased with the chain length of the triblock copolymer. For chain lengths above 20, the α-helical structure is stabilized and a lamellar morphology is formed driven by rod–rod interactions in spite of the very asymmetric composition of the triblock copolymer. However, decreasing the film thickness from 25 to 8 nm, i.e., below the L/2 and due to the preferential attraction of the polypeptide block for the hydrophilic substrate employed, instead of a lamellar morphology a rod-like morphology could be found. Thus, the use of hybrid block copolymer containing polypeptides with particular secondary structures offers novel alternatives to control the self-assembly in thin films compared to traditional amorphous block copolymers." @default.
- W2003780512 created "2016-06-24" @default.
- W2003780512 creator A5042245843 @default.
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- W2003780512 date "2010-05-01" @default.
- W2003780512 modified "2023-09-25" @default.
- W2003780512 title "Supramolecular structures from self-assembled poly(γ-benzyl-l-glutamate)–polydimethylsiloxane–poly(γ-benzyl-l-glutamate) triblock copolypeptides in thin films" @default.
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- W2003780512 doi "https://doi.org/10.1016/j.eurpolymj.2010.02.006" @default.
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