Shape control synthesis of polymeric hybrid nanoparticles via surface-initiated atom-transfer radical polymerization

摘要

Polymeric hybrid nanoparticles were synthesized via surface-initiated atom-transfer radical polymerization (SI-ATRP) method on the surface of gold nanoparticles in cyclohexanone. Tetraoctyl ammonium bromide (TOAB) as a phase transfer agent was used to transfer the gold nanoparticles into cyclohexanone, which will be replaced by disulfide initiator on the surface of gold nanoparticles. Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and UV-vis spectroscopy were utilized to characterize the product to make sure the experiment had been conducted. The results showed that the polymeric gold hybrid nanoparticles with different structures could be controlled by adjusting the ratio of initiator and gold nanoparticles in ATRP. If the ratio is very little, asymmetric polystyrene-gold hybrid nanoparticles were synthesized, and a single gold nanoparticle was attached with a polystyrene sphere. If the ratio becomes larger, core-shell polystyrene-gold nanocomposite particles were obtained resulting in gold nanoparticle encapsulated by a uniform polymer shell. (c) 2016 Wiley Periodicals, Inc.