| 1 | 检测SF_(6)分解特征组分的MoS_(2)纳米片气敏特性与机理研究显示文摘通过水热法结合高温固相法合成片状纳米MoS_(2)结构,并用场发射扫描电子显微镜(field emission scanning electron microscopy,FESEM)、X射线衍射(X-ray diffraction,XRD)、X射线光电子能谱(X-ray photoelectron spectroscopy,XPS)与拉曼光谱对MoS_(2)微观形貌、晶体结构、元素组成与振动模式进行表征,将纳米MoS_(2)通过丝网印刷法均匀涂覆于叉指电极表面制备电阻式气体传感器,测试SO2、SOF2、SO2F2和H2S共4种SF_(6)分解特征组分的气敏响应特性,用第一性原理密度泛函理论,分析MoS_(2)微观结构的物理化学特性,探索SF_(6)分解组分别在MoS_(2)表面与边缘结构的吸附性能,包括吸附能、电荷转移、吸附距离与范德华力比率等。结果显示,基于片状纳米MoS_(2)的气体传感器对4种SF_(6)分解组分的最佳工作温度均为200℃。在最佳工作温度下,传感器对4种SF_(6)分解组分在0~50×10^(-6)响应–浓度关系有高线性度(R^(2)>0.959),理论检测极限排序为H_(2)S | 陈达畅 唐炬 张晓星 吴鹏 李祎 刘惠军 | 2022 | 中国电机工程学报2022，42，22： | 5 |
| 2 | Recent Development of Gas Sensing Platforms Based on 2D Atomic Crystals显示文摘Sensors,capable of detecting trace amounts of gas molecules or volatile organic compounds(VOCs),are in great demand for environmental monitoring,food safety,health diagnostics,and national defense.In the era of the Internet of Things(IoT)and big data,the requirements on gas sensors,in addition to sensitivity and selectivity,have been increasingly placed on sensor simplicity,room temperature operation,ease for integration,and flexibility.The key to meet these requirements is the development of high-performance gas sensing materials.Two-dimensional(2D)atomic crystals,emerged after graphene,have demonstrated a number of attractive properties that are beneficial to gas sensing,such as the versatile and tunable electronic/optoelectronic properties of metal chalcogenides(MCs),the rich surface chemistry and good conductivity of MXenes,and the anisotropic structural and electronic properties of black phosphorus(BP).While most gas sensors based on 2D atomic crystals have been incorporated in the setup of a chemiresistor,field-effect transistor(FET),quartz crystal microbalance(QCM),or optical fiber,their working principles that involve gas adsorption,charge transfer,surface reaction,mass loading,and/or change of the refractive index vary from material to material.Understanding the gas-solid interaction and the subsequent signal transduction pathways is essential not only for improving the performance of existing sensing materials but also for searching new and advanced ones.In this review,we aim to provide an overview of the recent development of gas sensors based on various 2D atomic crystals from both the experimental and theoretical investigations.We will particularly focus on the sensing mechanisms and working principles of the related sensors,as well as approaches to enhance their sensing performances.Finally,we summarize the whole article and provide future perspectives for the development of gas sensors with 2D materials. | Jiacheng Cao Qian Chen Xiaoshan Wang Qiang Zhang Hai-Dong Yu Xiao Huang Wei Huang | 2021 | Research2021，，1： | 2 |
| 3 | Hybridized 1T/2H-MoS_(2)/graphene fishnet tube for high-performance on-chip integrated micro-systems comprising supercapacitors and gas sensors显示文摘The emerging micro-nano-processing technologies have propelled significant advances in multifunctional systems that can perform multiple functions within a small volume through integration.Herein,we present an on-chip multifunctional system based on a 1T/2H-MoS_(2)/graphene fishnet tube,where a micro-supercapacitor and a gas sensor are integrated.A hybrid three-dimensional stereo nanostructure,including M0S_(2) nanosheets and graphene fishnet tubes,provides K^(+)ions with a short diffusion pathway and more active sites.Owing to the large layer spacing of IT-M0S_(2) promoting fast reversible diffusion,the on-chip micro-supercapacitor exhibits excellent electrochemical properties,including an areal capacitance of 0.1 F·cm^(-2)(1 mV·s^(-1)).The variation in the conductivity of 2H-MoS_(2) when ammonia molecules are adsorbed as derived from the first-principles calculations proves the Fermi level-changes theory.Driven by a micro-supercapacitor,the responsivity of the gas sensor can reach 55.7%at room temperature(27℃).The multifunctional system demonstrates the possibility of achieving a two-dimensional integrated system for wearable devices and wireless sensor networks in the future. | Chi Zhang Jing Ning Boyu Wang Haibin Guo Xin Feng Xue Shen Yanqing Jia Jianguo Dong Dong Wang Jincheng Zhang Yue Hao | 2021 | Nano Research2021，14，1： | 0 |
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