Nano Archive

Ultrathin, responsive polymer click capsules

Such, Georgina K. and Tjipto, Elvira and Postma, Almar and Johnston, Angus P. R. and Caruso, Frank (2007) Ultrathin, responsive polymer click capsules. NANO LETTERS, 7 (6). pp. 1706-1710. ISSN Print Edition ISSN: 1530-6984; Web Edition ISSN: 1530-6992

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We report a general click chemistry approach for the layer-by-layer assembly of ultrathin, polymer films on particles and the subsequent formation of polymer click capsules (CCs). Poly(acrylic acid) copolymers, synthesized with a minor component of either alkyne (PAA-Alk) or azide (PAA-Az) functionality, were alternately assembled on silica particles. The (PAA-Az/PAA-Alk)-coated particles were subsequently functionalized by exploiting the free alkyne click moieties present in the film upon exposure to an azide-modified rhodamine dye. Further, PAA CCs, obtained following removal of the silica particle template, were shown to exhibit pH-responsive behavior. This was demonstrated by reversible size changes of the CCs upon cycling between basic and acidic solutions. Polymer CCs are anticipated to find applications in various fields, including drug delivery and sensing.

Item Type:Article
Subjects:Material Science > Nanochemistry
Material Science > Soft materials
ID Code:2163
Deposited By:M T V
Deposited On:02 Jan 2009 12:19
Last Modified:02 Jan 2009 12:19

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