Humidity sensors based on molecular rectifiers
Humidity sensors based on molecular rectifiers
复制标题
基于分子整流器的湿度传感器
DOI：
10.1039/d2nr04498f
复制
发表时间：
2022
期刊：
影响因子：
6.7
通讯作者：
Jurchescu, Oana D.
中科院分区：
文献类型：
--
作者：
Sullivan, Ryan P.;Castellanos-Trejo, Eduardo;Ma, Renate;Welker, Mark E.;Jurchescu, Oana D.
环境湿度对我们和周围环境的健康和福祉起着关键作用，因此有必要仔细监测和控制它。为了实现这一目标，基于不同材料和工作原理的几种类型的仪器已经开发出来。在不影响其灵敏度和可靠性的情况下降低此类系统的生产成本，将允许更广泛的使用和更高的效率。有机材料是纳入湿度传感器的主要候选者，因为它们具有非凡的化学多样性，低成本和易于加工。在这里，我们设计、组装和测试了基于分子整流器的湿度传感器，它可以电传导环境湿度的变化，在0到70%的相对湿度范围内提供准确的定量信息。它们的运作依赖于极性水分子被吸收后分子层所经历的电场变化，从而导致隧道势垒的高度和形状发生变化。在多个循环中，响应是可逆的和可重复的，再加上器件结构和制造的简单性，使得这些纳米级传感器在各种应用中具有吸引力。
Ambient humidity plays a key role in the health and well-being of us and our surroundings, making it necessary to carefully monitor and control it. To achieve this goal, several types of instruments based on various materials and operating principles have been developed. Reducing the production costs for such systems without affecting their sensitivity and reliability would allow for broader use and greater efficiency. Organic materials are prime candidates for incorporation in humidity sensors given their extraordinary chemical diversity, low cost, and ease of processing. Here, we designed, assembled and tested humidity sensors based on molecular rectifiers that can electrically transduce the changes in the ambient humidity to offer accurate quantitative information in the range of 0 to 70% relative humidity. Their operation relies on the changes occurring in the electric field experienced by the molecular layer upon absorption of the polar water molecules, resulting in modifications in the height and shape of the tunneling barrier. The response is reversible and reproducible upon multiple cycles and, coupled with the simplicity of the device architecture and manufacturing, makes these nanoscale sensors attractive for incorporation in various applications.