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Preparation of Ag-Embedded Polystyrene Nanospheres and Nanocapsules by Miniemulsion Polymerization

✍ Scribed by Haeng-Deog Koh; Mohammad Changez; Jung-Pil Lee; Jae-Suk Lee

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
702 KB
Volume
30
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

An isopropyl myristate (IPM) biocompatible oil and an IPM solution of dodecanethiol‐capped Ag nanoparticles (NPs, 4.5 nm) were used as hydrophobes to suppress the Ostwald ripening of monomer/hydrophobe miniemulsified droplets in a surfactant‐stabilized water phase. The formation of non‐IPM‐encapsulated nanospheres (48 nm) and IPM‐encapsulated nanocapsules (90 nm) were precisely controlled by using a water‐soluble and an oil‐soluble initiator, respectively, in the presence of a pure IPM as a hydrophobe in miniemulsion polymerization. Well‐defined PS nanospheres, on which surfaces were coated with Ag NPs (Ag/PS nanospheres, 65 nm), and nanocapsules encapsulating both NPs and IPM liquid phase (Ag‐IPM/PS nanocapsules, 115 nm) were made by replacing the hydrophobe from pure IPM with Ag/IPM solution. These nanostructures were characterized by transmission and scanning electron microscopes.

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