The results of the investigation of impact of pulse humidity changes on the parameters of dynamic current-voltage loops and charge-voltage loops, and also dynamic transient currents for Pt/LiNbO3-film/Pt:Ti/SiO2/Si and porous Si/Si structures are presented. The peculiarities of current-voltage loops and transient currents curves are characteristic for poling processes in the space charge region similar to that observed in the case of ionic semiconductors. The efficiency of using the methods of dynamic electrophysical characterization for studying characteristics of various under fast humidity changes was demonstrated. The results are considered from the standpoint of applications in high-speed humidity sensing.
A.B. Nalbandyan Institute of Chemical Physics NAS RA(亚美尼亚国家科学院纳尔班扬化学物理研究所);Institute for Physical Research National Academy of Sciences of Armenia(亚美尼亚国家科学院物理研究所);The Scientific Technological Centre of Organic and Pharmaceutical Chemistry NAS RA(亚美尼亚国家科学院有机与药物化学科技中心);Georgia Institute of Technology(佐治亚理工学院);Georgia Tech Shenzhen Institute (GTSI)(佐治亚理工学院深圳研究院);Yerevan State University(埃里温国立大学)
Developing and Validating a High-Throughput Robotic System for the Accelerated Development of Porous Membranes
Department of Materials Science and Engineering, University of Toronto(材料科学与工程系,多伦多大学);Department of Chemical Engineering, University of Toronto(化学工程系,多伦多大学);Department of Engineering Science, University of Toronto(工程科学系,多伦多大学);Department of Mechanical Engineering, University of Waterloo(机械工程系,滑铁卢大学)
Sensing solvents with ultra-sensitive porous poly(ionic liquid) actuators
我们介绍了一种新的概念,用于制造具有前所未有的灵敏度和精度的溶剂刺激聚合物致动器。这是通过将多孔结构和静电络合梯度集成在具有用于溶剂吸附的离子液体物种的聚(离子液体)膜中来实现的。在与水中的1.5mol%丙酮分子接触时,致动器膜(1 mm × 20 mm × 30 μ m)弯曲成闭环。虽然溶剂和聚合物之间的相互作用驱动驱动的驱动,连续梯度的络合度结合多孔结构优化的驱动,使其具有高灵敏度,甚至能够区分丁醇溶剂异构体。膜还能够协同致动。该设计概念易于实现,并适用于其他MEMS系统,这在很大程度上巩固了它们在智能和敏感信号微机器人/设备中的潜力。
Local and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics
铁电体中的电化学现象对催化和传感应用特别感兴趣,最近的研究突出了铁电体极化、施加的表面电压和整体开关历史的综合作用。在这里,我们提出了一个系统的开尔文探针显微镜研究的相对湿度和极化切换历史的影响上的铁电Pb(Zr $_{0.2}$ Ti $_{0.8}$)O $_3$薄膜的表面电荷耗散。我们通过物理约束的无监督机器学习矩阵分解,字典学习的框架来分析表面电荷与铁电畴的相互作用,并揭示了所观察到的信号衰减背后的电压介导的物理过程的复杂相互作用。Fitzhugh-Nagumo反应扩散模型给出了对观察到的行为的额外见解,突出了字典学习分析中的横向扩散和电荷钝化过程贡献者。
Effects of withdrawal speeds on the structural, morphological, electrical, and optical properties of CuO thin films synthesized by dip-coating for CO2 gas sensing