Lewis Acid-Base Adducts for Improving the Selectivity and Sensitivity of Graphene Based Gas Sensors

Indrani Choudhuri, Debopriya Sadhukhan, Priyanka Garg, Arup Mahata, Biswarup Pathak

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

The first-principles calculations are performed to study the gas (NH3, NO2, NO, and N2O) sensing properties of pure and doped (B@, Al@, and Ga@) graphene surfaces. Interactions between the gas (NH3, NO2, NO, and N2O) and the graphene surfaces are improved due to the doping on graphene. So, the dopants are carefully chosen to form the Lewis acid-base pairs between the dopants and gas molecules. Formation energy calculations and ab initio molecular dynamics simulations (AIMD) are carried out to evaluate their thermodynamic and thermal stabilities, respectively. The electronic properties of the Al@graphene change significantly when a selective gas molecule (NO2) is adsorbed. Thus, we report that Al@graphene can be a promising material for the highly selective and sensitive semiconductor based gas sensor.

Original languageEnglish (US)
Pages (from-to)451-459
Number of pages9
JournalACS Sensors
Volume1
Issue number4
DOIs
StatePublished - Apr 22 2016

Keywords

  • aluminum
  • boron
  • doping
  • gallium
  • gas sensor
  • graphene

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