Understanding structure, property, composition relationship for electromagnetic absorbing materials made in flow reactors

这项研究将调查纳米材料的结构和组成如何影响辐射吸收器(RFID安全标签、风力涡轮机隐形涂层等)的工业应用性能。这些纳米材料将使用伦敦大学学院的连续水热流反应堆进行合成。纳米材料将被设计成具有特定的组成和表面涂层，以便在期望的应用中影响其性能。这项工作将主要是实验性的，包括合成和使用无机材料的关键分析方法，重要的是测量相关的磁性和介电性质，这将使人们能够看到它们未来可能的辐射吸收性能。获得的铅材料将被放大，然后在行业合作伙伴的支持下作为涂层进行测试。要了解有关伦敦大学学院清洁材料技术研究组研究的更多信息，请参阅http://chemb125.chem.ucl.ac.uk/Key目标开发一种新的合成方法来制造可用于吸收电磁辐射的各种金属和金属氧化物的纳米材料库开发更快的筛选方法来表征材料的介电和磁性根据上述属性定义材料的应用空间试图阐明一般设计规则并构建结构、性能、组成关系。包覆纳米颗粒以改变其性质并增强特定频率下的电磁吸收。放大铅材料并将其涂覆在人工制品上以评估它们是否能够吸收相关频率(例如，雷达波，在使用流动水热反应合成大量纳米材料的方法中，新颖性是使人们了解和了解设计在特定波长增强的辐射吸收材料的任何规则，在颗粒中添加涂层以改善其吸收性能新颖性将是制造更大数量的材料并保持与实验室规模的材料相同的性能的能力。其他新颖性将来自对过程的控制和对材料质量的控制，这是目前存在的问题。

The research will investigate how the structure and composition of nanomaterials affects the properties in industrial applications for radiation absorbers (RFID security taggants, stealth coatings for wind turbines etc). These nanomaterials will be synthesised using UCL's continuous hydrothermal flow reactors. The nanomaterials will be designed with specific compositions and surface coatings in order to affect their properties in the desired applications. The work will be principally experimental, involving synthesis and the use of key analytical methods for inorganic materials and importantly to measure the relevant magnetic and dielectric properties that will allow some view as to their likely performance for radiation absorbers in the future. The lead materials that are obtained will be scaled up and then tested as coatings with support from the industry partner. To find out more about research at UCL in Clean Materials Technology Research Group see http://chemb125.chem.ucl.ac.uk/Key objectivesDevelop a novel synthesis approach to manufacture libraries of nanomaterials of various metals and metal oxides that can be used to absorb electromagnetic radiationDevelop faster screening methods to characterise the dielectric and magnetic properties of the materialsDefine the applications space for the materials according to the above propertiesTry to elucidate general design rules and build structure, property, compositional relationships.Coat nanoparticles to alter their properties and enhance electromagnetic absorption at specific frequencies.Scale-up of lead materials and coating of them onto artefacts to assess if they are capable to absorb the relevant frequencies (e.g. radar waves, i.e. microwaves in a certain region)NoveltyIn the approach for synthesis of large number of nanomaterials using flow hydrothermal reactorsNovelty is to bring understanding and knowledge of any rules for designing radiation absorber materials that are enhanced in specific wavelengthsAdding coatings to the particles to improve their absorbing propertiesNovelty will be in the ability to manufacture larger amounts of materials and retaining the same properties as materials made on the lab scale.Other novelty will arise from the control of the process and the ability to control quality of materials from batch to batch which is currently a problem.