Functionalized polymer spheres via one-step photoinduced synthesis for antimicrobial activity and gene delivery

Chia Wei Wang, S. Ja Tseng, Shu Fen Peng, Yeu Kuang Hwu, Chung Kwei Lin

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Despite the fact that polystyrene (PS) spheres have been developed as polymeric carriers or matrices for various biomedical applications, the synthesis of PS spheres is time-consuming. This work describes the fabrication of a uniform PS sphere, coated with silver nanoparticles (AgPS), by simultaneous photoinduced polymerization and reduction fabricated using x-rays in aqueous solution without any initiator. The solution contains only styrene, silver ions (Ag +), and poly(vinyl pyrrolidone) (PVP) as a stabilizer. The proposed mechanism of the formation of the AgPS nanocomposite spheres involves the generation of radicals in the aqueous solution to induce PS polymerization and the reduction of Ag. The distribution of the sizes of the core PS spheres in the AgPS nanocomposite spheres was systematically examined as a function of irradiation time, concentration of styrene, and amount of PVP. AgPS nanocomposite spheres exhibit antimicrobial activity against bacteria (Escherichia coli and Staphylococcus aureus). Additionally, the cationic (vinylbenzyl)trimethylammonium (TMA) monomer was photopolymerized to form positively charged TMAPS spheres as gene carriers with uniquely low cytotoxicity. Given these design advantages, the method proposed herein is simpler than typical approaches for synthesizing PS spheres with functionalized groups and PS spheres coated with Ag nanoparticles.

Original languageEnglish
Article number255103
JournalNanotechnology
Volume23
Issue number25
DOIs
Publication statusPublished - Jun 29 2012

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Polymers
Polystyrenes
Genes
Pyrrolidinones
Nanocomposites
Styrene
Silver
Polymerization
Nanoparticles
Cytotoxicity
Escherichia coli
Bacteria
Monomers
Irradiation
Ions
Fabrication
X rays

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Functionalized polymer spheres via one-step photoinduced synthesis for antimicrobial activity and gene delivery. / Wang, Chia Wei; Tseng, S. Ja; Peng, Shu Fen; Hwu, Yeu Kuang; Lin, Chung Kwei.

In: Nanotechnology, Vol. 23, No. 25, 255103, 29.06.2012.

Research output: Contribution to journalArticle

Wang, Chia Wei ; Tseng, S. Ja ; Peng, Shu Fen ; Hwu, Yeu Kuang ; Lin, Chung Kwei. / Functionalized polymer spheres via one-step photoinduced synthesis for antimicrobial activity and gene delivery. In: Nanotechnology. 2012 ; Vol. 23, No. 25.
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