In situ fabrication of platinum/graphene composite shell on polymer microspheres through reactive self-assembly and in situ reduction

Joon-Suk Oh, Nguyen Dang Luong, Tae-Seon Hwang, Jung-Pyo Hong, Young Kwan Lee, Jae-Do Nam*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Abstract

We present a simple method to fabricate a uniform-sized graphene-metal-polymer composite microsphere of core-shell structure. On the surface of amine-functionalized polymer microsphere, graphene oxide (GO) sheets were affixed to give a core-shell structure by self-assembly process followed by the immobilization of platinum (Pt) ions to the assembled GO shell. Subsequently, they were chemically reduced in situ converting both GO and Pt ions to reduced GO (RGO) and Pt nanoparticles (NPs), respectively. As a result, a robust RGO-Pt composite shell, composed of RGO sheets and well-distributed Pt NPs, was fabricated on the microsphere surface. Meanwhile, the insulative GO shell was converted to the conductive RGO-Pt shell giving 24.0 S m(-1) of electrical conductivity. We demonstrated that the electrical property of the shell was significantly improved by the incorporation of Pt NPs.

Original languageEnglish
Pages (from-to)1127-1133
Number of pages7
JournalJournal of Materials Science
Volume48
Issue number3
DOIs
Publication statusPublished - Feb 2013
MoE publication typeA1 Journal article-refereed

Keywords

  • GRAPHITE OXIDE
  • GOLD NANOPARTICLES
  • GRAPHENE
  • SURFACE
  • NANOCOMPOSITES
  • NANOSHEETS
  • METAL
  • BEADS

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