Recent advances in graphene based gas sensors

Seba S. Varghese, Sunil Lonkar, K. K. Singh, Sundaram Swaminathan, Ahmed Abdala

Research output: Contribution to journalArticle

391 Citations (Scopus)

Abstract

Graphene, a single, one-atom-thick sheet of carbon atoms arranged in a honeycomb lattice and the two-dimensional building block for carbon materials, has attracted great interest for a wide range of applications. Due to its superior properties such as thermo-electric conduction, surface area and mechanical strength, graphene materials have inspired huge interest in sensing of various chemical species. In this timely review, we discuss the recent advancement in the field of graphene based gas sensors with emphasis on the use of modified graphene materials. Further, insights of theoretical and experimental aspects associated with such systems are also discussed with significance on the sensitivity and selectivity of graphene towards various gas molecules. The first section introduces graphene, its synthesis methods and its physico-chemical properties. The second part focuses on the theoretical approaches that discuss the structural improvisations of graphene for its effective use as gas sensing materials. The third section discusses the applications of pristine and modified graphene materials in gas sensing applications. Various graphene modification methods are discussed including using dopants and defects, decoration with metal/metal oxide nanoparticles, and functionalization with polymers. Finally, a discussion on the future challenges and perspectives of this enticing field of graphene sensors for gas detection is provided.

Original languageEnglish
Pages (from-to)160-183
Number of pages24
JournalSensors and Actuators, B: Chemical
Volume218
DOIs
Publication statusPublished - 25 May 2015

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Keywords

  • Functionalized graphene
  • Gas sensors
  • Graphene
  • Graphene doping
  • Graphene oxide
  • Reduced graphene oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry
  • Electrical and Electronic Engineering

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