| 초록 |
MXenes are a new class of two dimensional materials consisting of few atoms thick layers of transition metal carbides, nitrides, or carbonitrides. Previous research suggested that metallic Ti3C2Tx MXene gas sensor shows ultrahigh gas sensing performance in the view of signal to noise ratio than other 2D materials like reduced graphene oxide, molybdenum disulfide and black phosphorus. In this work, we fabricated semiconducting Mo2CTx MXene gas sensor through simple spin coating method and achieved 10 times higher signal to noise ratio with NO2 gas than metallic Ti3C2Tx MXene sensor. Also, different sensing behaviors were observed that increasing response when exposed to volatile organic compounds gases like ethanol and decreasing response to strong polar gases like NH3 and NO2. Our semiconducting Mo2CTx gas sensor will be a strong candidate for detecting hazardous gases due to distinct sensing response and high signal to noise ratio. |
