Petzetakis, Nikos, Robin, Mathew P., Patterson, Joseph P., Kelley, Elizabeth G., Cotanda, Pepa, Bomans, Paul H. H., Sommerdijk, Nico A. J. M., Dove, Andrew P., Epps, Thomas H. and O’Reilly, Rachel K. (2013) Hollow block copolymer nanoparticles through a spontaneous one-step structural reorganization. ACS Nano, Vol.7 (No.2). pp. 1120-1128. doi:10.1021/nn400272p ISSN 1936-0851.

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Abstract

The spontaneous one-step synthesis of hollow nanocages and nanotubes from spherical and cylindrical micelles based on poly(acrylic acid)-b-polylactide (P(AA)-b-P(LA)) block copolymers (BCPs) has been achieved. This structural reorganization, which occurs simply upon drying of the samples, was elucidated by transmission electron microscopy (TEM) and atomic force microscopy (AFM). We show that it was necessary to use stain-free imaging to examine these nanoscale assemblies, as the hollow nature of the particles was obscured by application of a heavy metal stain. Additionally, the internal topology of the P(AA)-b-P(LA) particles could be tuned by manipulating the drying conditions to give solid or compartmentalized structures. Upon resuspension, these reorganized nanoparticles retain their hollow structure and display significantly enhanced loading of a hydrophobic dye compared to the original solid cylinders.

Item Type:	Journal Article
Divisions:	Faculty of Science, Engineering and Medicine > Science > Chemistry
Journal or Publication Title:	ACS Nano
Publisher:	American Chemical Society
ISSN:	1936-0851
Official Date:	2013
Dates:	Date Event 2013 Published
Volume:	Vol.7
Number:	No.2
Page Range:	pp. 1120-1128
DOI:	10.1021/nn400272p
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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