Issue 37, 2015
From the journal:

Nanoscale

Co-assembly of cyclic peptide nanotubes and block copolymers in thin films: controlling the kinetic pathway†

Chen Zhanga  and  Ting Xu*abc  

* Corresponding authors

a Department of Materials Science and Engineering, University of California, Berkeley, CA 94720-1760, USA
E-mail: tingxu@berkeley.edu

b Department of Chemistry, University of California, Berkeley, CA 94720-1460, USA

c Material Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

Abstract

Directed co-assembly of polymer-conjugated cyclic peptide nanotubes (CPNs) and block copolymers in thin films is a viable approach to fabricate sub-nanometer porous membranes without synthesizing nanotubes with identical length and vertical alignment. Here we show that the process is pathway dependent and successful co-assembly requires eliminating CPNs larger than 100 nm in solution. Optimizing polymer–solvent interactions can improve conjugate dispersion to a certain extent, but this limits thin film fabrication. Introduction of a trace amount of hydrogen-bond blockers, such as trifluoroacetic acid by vapor absorption, is more effective to reduce CPN aggregation in solution and circumvents issues of solvent immiscibility. This study provides critical insights into guided assemblies within nanoscopic frameworks toward sub-nanometer porous membranes.

Graphical abstract: Co-assembly of cyclic peptide nanotubes and block copolymers in thin films: controlling the kinetic pathway

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Article information

DOI
https://doi.org/10.1039/C5NR03915K
Article type
Communication
Submitted
13 Jun 2015
Accepted
14 Aug 2015
First published
20 Aug 2015

Nanoscale, 2015,7, 15117-15121

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Co-assembly of cyclic peptide nanotubes and block copolymers in thin films: controlling the kinetic pathway

C. Zhang and T. Xu, Nanoscale, 2015, 7, 15117 DOI: 10.1039/C5NR03915K

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