%0 Journal Article
%T Preparation of Fe3O4-Embedded Poly(styrene)/Poly(thiophene) Core/Shell Nanoparticles and Their Hydrogel Patterns for Sensor Applications
%A Yong Seok Kim
%A Hyun Jong Lee
%A Patakamuri Govindaiah
%A Woohyun Son
%A Won-Gun Koh
%A In Woo Cheong
%A Jung Hyun Kim
%J Materials
%D 2014
%I MDPI AG
%R 10.3390/ma7010195
%X This research describes the preparation and sensor applications of multifunctional monodisperse, Fe 3O 4 nanoparticles-embedded poly(styrene)/poly(thiophene) (Fe 3O 4-PSt/PTh), core/shell nanoparticles. Monodisperse Fe 3O 4-PSt/PTh nanoparticles were prepared by free-radical combination (mini-emulsion/emulsion) polymerization for Fe 3O 4-PSt core and oxidative seeded emulsion polymerization for PTh shell in the presence of FeCl 3/H 2O 2 as a redox catalyst, respectively. For applicability of Fe 3O 4-PSt/PTh as sensors, Fe 3O 4-PSt/PTh-immobilized poly(ethylene glycol) (PEG)-based hydrogels were fabricated by photolithography. The hydrogel patterns showed a good sensing performance under different H 2O 2 concentrations. They also showed a quenching sensitivity of 1 ¦Ìg/mL for the Pd 2+ metal ion within 1 min. The hydrogel micropatterns not only provide a fast water uptake property but also suggest the feasibility of both H 2O 2 and Pd 2+ detection.
%K polythiophene
%K nanoparticles
%K fluorescence
%K sensor
%K hydrogel patterns
%U http://www.mdpi.com/1996-1944/7/1/195