Materials and Synchrotron Radiation

我将在纳米材料的合成及其在电池、燃料电池、太阳能电池和催化等设备中的性能和性能，以及同步加速器技术(基于电子加速器的、明亮的、能量可调的X射线源)的开发和应用方面取得进展。领域包括(I)日益复杂的纳米材料(尺寸约为千分之一头发的材料)；例如，具有尺寸、形态、物相、杂质和结晶度依赖结构、电子和传输性质的纳米复合材料，即我研究如此小尺寸的材料如何表现出与大块材料不同的行为，导致催化剂和能源设备的改进设计；(2)用于能源应用的纳米材料(锂/钠离子和全固态电池、太阳能电池和电催化剂)，利用加拿大光源(CLS)的原位/操作(在设备运行时实时)X射线吸收测量来跟踪它们的性能；这项技术将促进设备的创新设计；(3)生物兼容纳米材料在药物输送方面的应用；(4)在软X射线(2000-5000 eV)和硬X射线能区(&GT；5000 eV)(V)推动同步加速器在文化和遗产材料中的应用范围。*将探索金属氧化物(例如二氧化钛和氧化锌)、碳基材料(例如石墨烯和量子点)、与电极相关的磷和硫基材料以及用于所有固态电池的固态电解液、双金属(例如镍铂、铁铂和钴铂)以及生物材料(例如硅酸钙、磷酸盐和羟基磷灰石)的纳米结构。合成技术包括阳极氧化法、气-液-固法、水热法和原子层/分子层合成法。这些材料在装置中的性能将通过在CLS的原位/操纵面X射线吸收、X射线荧光、光电发射和成像来跟踪。*我将在以下方面推动同步辐射前沿：(1)在CLS建立原位/操作能力，跟踪化学变化，例如电池充电和放电过程中的化学变化；(2)在CLS实施高能量分辨率(&lt；1 eV)招标X射线发射光谱仪，用于P和S的X射线发射；高分辨率极大地提高了在运行过程中检测设备中化学变化的灵敏度。这台光谱仪将使P和S K边的共振非弹性X射线散射和高能分辨荧光探测成为可能，并将使P和S的物种形成发生革命性变化；(3)在CLS的SM光束线上用X射线激发的光学发光和光刻技术改进纳米成像技术，从而能够研究单个纳米结构的功能；和(4)利用X射线荧光成像技术从具有历史意义的严重受损的19世纪银版(人类活动的第一次摄影)中恢复图像。

I will advance in nanomaterials synthesis, their properties and performance in devices such as batteries, fuel cells, solar cells and catalysis, and the development and application of synchrotron technology (electron accelerator based, bright and energy tunable X-ray source). Areas include (i) Nanomaterials (materials with the size on the order of a thousandth of a hair) of increasing complexity; e.g. nanocomposites with size, morphology, phase, impurity and crystallinity dependent structures, electronic and transport properties, i.e. that I investigate how materials with such a small size behave differently from the bulk, leading to improved design of catalysts and energy devices; (ii) nanomaterials for energy applications (Li/Na ion and all solid state batteries, solar cells and electro-catalysts), tracking their performance with in situ/operando (in real time while the device is in operation) X-ray absorption measurements at the Canadian Light Source (CLS); this technique will facilitate the innovative design of devices; (iii) bio-compatible nanomaterial applications in drug delivery; (iv) development of high energy resolution spectroscopy in the tender X-ray (2000-5000 eV) and hard X-ray energy region (> 5000 eV) (v) pushing the boundaries of synchrotron applications in cultural and heritage materials. ***Nanostructures of metal oxides (e.g. TiO2, and ZnO), carbon-based materials (e.g. graphene and quantum dots), phosphorus- and sulfur-based materials relevant to electrode and solid-state electrolytes for all solid-state batteries, bimetallics (e.g. Ni-Pt, Fe-Pt and Co-Pt) and bio-materials (e.g. calcium silicates, phosphates and hydroxyapatite) will be explored. Synthetic techniques include anodization, vapor-liquid-solid, hydrothermal and atomic layer/molecular layer synthesis. The performance of these materials in devices will be tracked with in situ/operando X-ray absorption, X-ray fluorescence, photoemission and imaging at the CLS. ***I will push synchrotron frontier in (1) building situ/operando capabilities at the CLS, tracking chemical changes, e.g. during the charge and discharge of a battery; (2) implementing a high-energy-resolution (< 1 eV) tender X-ray emission spectrometer at the CLS, for P and S X-ray emission; high resolution greatly improves the sensitivity for detecting chemical changes in devices during operations. Resonant Inelastic X-ray Scattering and high energy resolution fluorescence detection (HERFD) X-ray absorption at the P and S K-edge will be possible with this spectrometer and will revolutionize the speciation of P and S; (3) advancing nano-imaging techniques with X-ray excited optical luminescence and ptychography at the SM beamline of the CLS, allowing for the study of the functionality of an individual nanostructure and (4) retrieving images from badly tarnished 19th century daguerreotype (the very first photography of human activities) of historical significance using X-ray fluorescence imaging.********