Preparation of Fe?O?-Embedded Poly(styrene)/Poly(thiophene) Core/Shell Nanoparticles and Their Hydrogel Patterns for Sensor Applications.

ABSTRACT: This research describes the preparation and sensor applications of multifunctional monodisperse, Fe?O? nanoparticles-embedded poly(styrene)/poly(thiophene) (Fe?O?-PSt/PTh), core/shell nanoparticles. Monodisperse Fe?O?-PSt/PTh nanoparticles were prepared by free-radical combination (mini-emulsion/emulsion) polymerization for Fe?O?-PSt core and oxidative seeded emulsion polymerization for PTh shell in the presence of FeCl?/H?O? as a redox catalyst, respectively. For applicability of Fe?O?-PSt/PTh as sensors, Fe?O?-PSt/PTh-immobilized poly(ethylene glycol) (PEG)-based hydrogels were fabricated by photolithography. The hydrogel patterns showed a good sensing performance under different H?O? concentrations. They also showed a quenching sensitivity of 1 µg/mL for the Pd2+ metal ion within 1 min. The hydrogel micropatterns not only provide a fast water uptake property but also suggest the feasibility of both H?O? and Pd2+ detection.

SUBMITTER: Kim YS 

PROVIDER: S-EPMC5453122 | biostudies-literature | 2014 Jan

REPOSITORIES: biostudies-literature