Understanding the Microwave Absorption of Hydrogenated TiO2 Nanoparticles

非技术描述：本项目主要研究加氢对二氧化钛纳米粒子微波吸收性能的影响。这些纳米粒子有可能推动微波吸收领域的发展，从而在电信、航天器通信、无线通信、雷达探测、卫星导航等领域得到许多实际应用。研究小组旨在了解氢化如何影响具有不同相组成和表面形貌的无机纳米颗粒的微波吸收的潜在机制。首席研究员为研究生和本科生提供培训机会，并通过各种推广活动，向当地社区和代表性不足的群体推广他的研究成果。他开发了针对这些材料的电子和光子特性的在线课程，这些课程对公众开放。技术描述：该项目解决了PI小组新观察到的氢化二氧化钛纳米颗粒中微波吸收显著增加的现象，这些现象无法用传统机制解释。该项目的目标是通过综合方法揭示氢化的潜在机制并阐明氢化的影响，利用各种表征方法，如x射线衍射、高分辨率透射电子显微镜、拉曼光谱、紫外可见吸收光谱、傅立叶变换红外光谱、（价带）x射线光电子能谱，以及带网络分析仪的传输线技术。该项目将研究活动与研究生、本科生和高中生的教育机会结合起来。

Nontechnical description: This project is focused on the effect of hydrogenation on the microwave absorption properties of titanium dioxide nanoparticles. These nanoparticles have the potential to advance the field of microwave absorption, leading to a number of practical applications in areas such as telecommunication, spacecraft communication, wireless communication, radar detection, satellite navigation, etc. The research team aims to understand the underlying mechanisms of how hydrogenation affects the microwave absorption of inorganic nanoparticles with various phase compositions and surface morphologies. The principal investigator provides training opportunities for graduate and undergraduate students and popularizes his research efforts and results via various outreach activities, reaching to the local community and underrepresented groups. He develops online courses focused on electronic and photonic properties of these materials, which are available to the public. Technical description: This project tackles newly observed phenomena by the PI's group of significantly increased microwave absorption in hydrogenated titanium dioxide nanoparticles that cannot be explained with traditional mechanisms. The project goal is to reveal the underlying mechanisms and to elucidate the effects of hydrogenation by comprehensive approach, studying structural, chemical, optical, electronic, dielectric and microwave absorption properties by employing various characterization methods such as X-ray diffraction, high-resolution transmission electron microscopy, Raman spectroscopy, ultraviolet-visible absorption spectroscopy, Fourier transform infrared spectroscopy, (valence band) X-ray photoelectron spectroscopy, and a transmission line technique with a network analyzer. The project integrates the research activities with educational opportunities for graduate, undergraduate and high-school students.