MXenes are a rapidly emerging class of two-dimensional transitional metal carbides/nitrides with very high electrical conductivity, high density of surface functionalities, and excellent solution processability. Also, their easiness to be coated on a wide variety of surfaces render MXenes excellent candidates for functional films and composites toward numerous applications. In this presentation, the utilization of MXenes thin films for highly sensitive gas sensors will be discussed. In detail, methods to control the stacking and interlayer structure of MXene thin films and their application as gas sensors will be presented. Assembled MXene films were able to detect ppb-level volatile organic compound (VOC) gases at room temperature, being more sensitive than any other reported material, which is critically important for therapeutic applications. Furthermore, the controlled intercalation of metal ions into the interlayers of MXene films dramatically increased the selectivity of MXene gas sensors toward VOCs.

Interlayer structure control and self-assembly of two-dimensional MXene thin films for gas sensors

2019 Fall National Meeting

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