Graphene-like nano-Sheets/36° LiTaO3 surface acoustic wave hydrogen gas sensor

Presented is the material and gas sensing properties of graphene-like nano-sheets deposited on 36deg YX lithium tantalate (LiTaO
₃
) surface acoustic wave (SAW) transducers. The graphene-like nano-sheets were characterized via scanning electron microscopy (SEM), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). The graphenelike nano-sheet/SAW sensors were exposed to different concentrations of hydrogen (H
₂
) gas in a synthetic air at room temperature. The developed sensors exhibit good sensitivity towards low concentrations of H
₂
in ambient conditions, as well as excellent dynamic performance towards H
₂
at room temperature.