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Light-Controlled Hierarchical Self-Assembly of Polyelectrolytes and Supramolecular Polymers

Journal Article · · ACS Macro Letters
DOI:https://doi.org/10.1021/mz500677q· OSTI ID:1820389
 [1];  [2];  [2];  [3]
  1. Northwestern Univ., Evanston, IL (United States); Northwestern CBES
  2. Ben Gurion Univ. of the Negev, Beer Sheva (Israel)
  3. Northwestern Univ., Evanston, IL (United States)

Dynamic control over supramolecular interactions using various stimuli continues to drive the development of smart materials. In this paper, we describe the extension of dynamic self-assembly to a self-assembled hierarchical structure. A peptide amphiphile (PA) was designed with a photocleavable nitrobenzyl ester component such that it would undergo a sphere-to-cylinder transition upon irradiation, as confirmed by cryogenic transmission electron microscopy and small-angle X-ray scattering (SAXS). The photocleavable PA was then tested in the formation of a macroscopic sac made through a complex hierarchical self-assembly process between PA and hyaluronic acid. The microstructure of the resulting sac has previously been noted to depend dramatically on the geometry of the PA nanostructure. Photolysis of the PA solution during sac formation led to a sac microstructure that displayed characteristics of sacs made with both cylinder-forming PAs and sphere-forming PAs, as measured by scanning electron microscopy and SAXS.

Research Organization:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-00ER45810
OSTI ID:
1820389
Journal Information:
ACS Macro Letters, Journal Name: ACS Macro Letters Journal Issue: 1 Vol. 4; ISSN 2161-1653
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Self-Assembled Fluorescent Organic Nanomaterials for Biomedical Imaging journal August 2018
Donor–acceptor interaction-driven self-assembly of amphiphilic rod–coil molecules into supramolecular nanoassemblies journal January 2017
Morphology transformation of self-assembled organic nanomaterials in aqueous solution induced by stimuli-triggered chemical structure changes journal January 2017
Supramolecular self-assembly of fluorescent peptide amphiphiles for accurate and reversible pH measurement journal January 2019