Growth of metal-metal oxide nanostructures on freestanding graphene paper for flexible biosensors

Fei Xiao, Yuanqing Li, Xiaoli Zan, Kin Liao, Rong Xu, Hongwei Duan

Research output: Contribution to journalArticlepeer-review

252 Scopus citations

Abstract

Flexible biosensors are of considerable current interest for the development of portable point-of-care medical products, minimally invasive implantable devices, and compact diagnostic platforms. A new type of flexible electrochemical sensor fabricated by depositing high-density Pt nanoparticles on freestanding reduced graphene oxide paper (rGOP) carrying MnO 2 nanowire networks is reported. The triple-component design offers new possibilities to integrate the mechanical and electrical properties of rGOP, the large surface area of MnO 2 networks, and the catalytic activity of well-dispersed and small-sized Pt nanoparticles prepared via ultrasonic-electrodeposition. The sensitivity and selectivity that the flexible electrode demonstrates for nonenzymatic detection of H 2O 2 enables its use for monitoring H 2O 2 secretion by live cells. The strategy of structurally integrating metal, metal oxide, and graphene paper will provide new insight into the design of flexible electrodes for a wide range of applications in biosensing, bioelectronics, and lab-on-a-chip devices.

Original languageBritish English
Pages (from-to)2487-2494
Number of pages8
JournalAdvanced Functional Materials
Volume22
Issue number12
DOIs
StatePublished - 20 Jun 2012

Keywords

  • electrodeposition
  • flexible biosensors
  • graphene paper
  • manganese dioxide nanowires
  • platinum nanoparticles

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