Preparation of Fe3O4-embedded poly(styrene)/poly(thiophene) core/shell nanoparticles and their hydrogel patterns for sensor applications

Yong Seok Kim, Hyun Jong Lee, Patakamuri Govindaiah, Woohyun Son, Won Gun Koh, In Woo Cheong, Jung Hyun Kim

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

This research describes the preparation and sensor applications of multifunctional monodisperse, Fe3O4 nanoparticles-embedded poly(styrene)/poly(thiophene) (Fe3O4-PSt/PTh), core/shell nanoparticles. Monodisperse Fe3O4-PSt/PTh nanoparticles were prepared by free-radical combination (mini-emulsion/emulsion) polymerization for Fe3O4-PSt core and oxidative seeded emulsion polymerization for PTh shell in the presence of FeCl3/H2O2 as a redox catalyst, respectively. For applicability of Fe3O4-PSt/PTh as sensors, Fe3O4-PSt/PTh-immobilized poly(ethylene glycol) (PEG)-based hydrogels were fabricated by photolithography. The hydrogel patterns showed a good sensing performance under different H2O2 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 H2O2 and Pd2+ detection.

Original languageEnglish
Pages (from-to)195-205
Number of pages11
JournalMaterials
Volume7
Issue number1
DOIs
Publication statusPublished - 2014 Feb 12

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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