Core-crosslinked compartmentalized cylinders

Schacher, Felix H; Rudolph, Tobias; Drechsler, Markus; Müller, Axel H E (2011). Core-crosslinked compartmentalized cylinders. Nanoscale, 3(1), pp. 288-97. Cambridge: Royal Society of Chemistry 10.1039/c0nr00649a

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We present a detailed study on the preparation of compartmentalized cylindrical nanoparticles via a templated approach: the polybutadiene part of a linear polybutadiene-block-poly(2-vinyl pyridine)-block-poly(tert-butyl methacrylate) block terpolymer, B420V280T790, having a bulk microstructure with PB cylinders covered by a P2VP double helix and embedded in a PtBMA matrix was selectively crosslinked. Subsequent sonication-assisted dissolution and chemical modifications such as quaternization (P2VP to P2VPq) and ester hydrolysis (PtBMA to poly(sodium methacrylate), PMANa) resulted in core-crosslinked cylinders soluble in organic and aqueous media. Different amounts of crosslinker and the influence of the sonication treatment on size and shape of the cylindrical aggregates were investigated. The cylinders always exhibit a compartmentalized corona. Under certain conditions, in particular quaternization of P2VP in mixtures of THF and MeOH, the helical arrangement of the P2VPq shell could be preserved even in solution, whereas in most other cases randomly distributed P2VP/P2VPq patches were observed. In aqueous solution at high pH, intramicellar interpolyelectrolyte complex (im-IPEC) formation occurred between the positively charged P2VPq shell and the negatively charged PMANa corona. We further show that different noble metal nanoparticles can be generated either selectively within the im-IPEC compartments (Pd) or randomly distributed among shell and corona of the cylinders (Au and Pt).

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Ophthalmology

UniBE Contributor:

Rudolph, Tobias

ISSN:

2040-3364

Publisher:

Royal Society of Chemistry

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:12

Last Modified:

22 Dec 2015 10:21

Publisher DOI:

10.1039/c0nr00649a

PubMed ID:

21060951

Web of Science ID:

000286204600030

URI:

https://boris.unibe.ch/id/eprint/2664 (FactScience: 205510)

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