Chemical Vapor Sensing, Physisorption and Separation on Graphene

Abstract

Chemical vapors are ubiquitous in our daily life, which can be human-made or naturally occurring. Understanding and electrically tuning of vapor molecule-surface interaction can have profound impact on fundamental surface physics and usher breakthroughs in the development of new materials and novel sensing techniques. Nanoelectronics system based on low dimensional materials offer a great platform to study such interactions due to their large surface-to-volume ratio, unique electronic properties, and low power consumption. Unlike their bulk counterpart, the reduced density of states in low dimensional nanomaterials provides the capability of electrostatic tuning of the charge densities and hence the chemical potential to further influence their interaction with the adsorbate molecules. Graphene, a monolayer of carbon atom in honeycomb network, is particularly attractive by offering perfect lattice with