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Biocatalytic Self‐Assembly of Nanostructured Peptide Microparticles using Droplet Microfluidics
Author(s) -
Bai Shuo,
Debnath Sisir,
Gibson Kirsty,
Schlicht Barbara,
Bayne Lauren,
Zagi Michele,
Ulijn Rein V.
Publication year - 2014
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201301333
Subject(s) - microfluidics , amphiphile , dispersity , emulsion , nanotechnology , self assembly , materials science , peptide , pulmonary surfactant , chemical engineering , aqueous two phase system , pickering emulsion , aqueous solution , chemistry , organic chemistry , nanoparticle , copolymer , polymer chemistry , biochemistry , polymer , engineering
Uniformly‐sized, nanostructured peptide microparticles are generated by exploiting the ability of enzymes to serve (i) as catalysts, to control self‐assembly within monodisperse, surfactant‐stabilized water‐in‐oil microdroplets, and (ii) as destabilizers of emulsion interfaces, to enable facile transfer of the produced microparticles to water. This approach combines the advantages of biocatalytic self‐assembly with the compartmentalization properties enabled by droplet microfluidics. Firstly, using microfluidic techniques, precursors of self‐assembling peptide derivatives and enzymes are mixed in the microdroplets which upon catalytic conversion undergo molecular self‐assembly into peptide particles, depending on the chemical nature of the precursors. Due to their amphiphilic nature, enzymes adsorb at the water‐surfactant‐oil interface of the droplets, inducing the transfer of peptide microparticles from the oil to the aqueous phase. Ultimately, through washing steps, enzymes can be removed from the microparticles which results in uniformely‐sized particles composed of nanostructured aromatic peptide amphiphiles.