Synthesis and antibacterial properties of a hybrid of silver-potato starch nanocapsules by miniemulsion/polyaddition polymerization

Shima Taheri, Grit Baier, Peter Majewski, Mary Barton, Renate Förch, Katharina Landfester*, Krasimir Vasilev

*Corresponding author for this work

Research output: Contribution to journalArticle

37 Citations (Scopus)
52 Downloads (Pure)

Abstract

Controlled synthesis of hollow polymeric nanocapsules has attracted significant attention in a wide range of applications. This paper reports a facile method for the synthesis of hybrid starch nanocapsules decorated with silver nanoparticles using the inverse miniemulsion polyaddition technique. Silver nanoparticles are formed and embedded in the shell of the nanocapsules during the polyaddition process without using any additional reducing agents. We found that silver also acts as a lipophobe that builds up osmotic pressure in the droplets facilitating the formation of stable round shaped nanocapsules. The nanocapsules' shell thickness could be tuned from 13 to 29 nm by varying the amount of cross-linker. We investigated the minimum inhibitory concentration (MIC) of the nanocapsules against Staphylococcus epidermidis ATCC 35984 and Escherichia coli ATCC 25922 which are two bacteria of medical relevance. The silver nanoparticle decorated nanocapsules showed antibacterial properties against both bacteria at the MIC of 2.315 μg mL-1 while control nanocapsules without silver had no antibacterial activity.

Original languageEnglish
Pages (from-to)1838-1845
Number of pages8
JournalJournal of Materials Chemistry B
Volume2
Issue number13
DOIs
Publication statusPublished - 7 Apr 2014
Externally publishedYes

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