论文标题
高性能原子稀薄的房间温度NO2传感器
High-Performance Atomically-Thin Room-Temperature NO2 Sensor
论文作者
论文摘要
对于广泛的低功率传感器应用，必须开发用于检测少量分子物种的室温传感设备。我们基于过渡金属二甲基元素RE0.5NB0.5S2的单层，展示了一个室温，高度敏感，选择性和可逆的化学传感器。传感设备表现出厚度依赖性载体类型，并且在暴露于NO2分子时，其电阻大大增加或减少，具体取决于层数。该传感器对NO2具有选择性，仅对其他气体（例如NH3，CH2O和CO2）的响应最少。在存在湿度的情况下，不仅传感特性不会恶化，而且单层传感器也显示出完全可逆性，并在室温下快速恢复。我们提供了对传感平台的理论分析，并确定了对原子敏感的转导机制。
The development of room-temperature sensing devices for detecting small concentrations of molecular species is imperative for a wide range of low-power sensor applications. We demonstrate a room-temperature, highly sensitive, selective, and reversible chemical sensor based on a monolayer of the transition metal dichalcogenide Re0.5Nb0.5S2. The sensing device exhibits thickness dependent carrier type, and upon exposure to NO2 molecules, its electrical resistance considerably increases or decreases depending on the layer number. The sensor is selective to NO2 with only minimal response to other gases such as NH3, CH2O, and CO2. In the presence of humidity, not only are the sensing properties not deteriorated, but also the monolayer sensor shows complete reversibility with fast recovery at room temperature. We present a theoretical analysis of the sensing platform and identify the atomically-sensitive transduction mechanism.
