Li, Chaoxu Li, Jingguo Zhang, Xiuqiang Zhang, Afang Mezzenga, Raffaele 2009-12-01 We investigate the complexation of ampholytic poly(<i>N</i>-isopropylacylamide)-<i>block</i>-poly- (L-glutamic acid)-<i>block</i>-poly(L-lysine) (PNiPAM-<i>b</i>-PLG-<i>b</i>-PLLys) triblock copolymers and PNiPAM-<i>block</i>-(PLG-<i>co</i>-PLLys) diblock copolymers with counter charged anionic and cationic surfactants. Both triblock and diblock copolymers are able to selectively form complexes through either L-glutamic acid-cationic surfactant or L-lysine-anionic surfactant ionic pairs, depending on the protonated or deprotonated states of the ampholytic peptide units. The complexes show ordering at multiple length scales: i) the block copolymer length scale (10¹ nm), ii) the liquid crystalline length scale (10⁰ nm), and, iii) the peptidic secondary structures length scale (10⁰ nm). We show that the liquid crystalline period can be tuned by varying the random/block copolypeptide architectures and the composition of the ampholytic amino acid species. application/pdf https://folia.unifr.ch/global/documents/301372 https://folia.unifr.ch/documents/301372/files/mezzenga_lcp.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1002/marc.200900633 info:eu-repo/semantics/openAccess License undefined Macromolecular Rapid Communications. - 2010, vol. 31, no. 3, p. 265-269 comb-like polymers complexes ionic complexes polypeptides side chain surfactants supramolecular chemistry info:eu-repo/classification/udc/53 Liquid crystalline period variations in self-assembled block copolypeptides-surfactant ionic complexes http://purl.org/coar/resource_type/c_6501