Structure/property relationships of active sites in crystals, amorphous materials and liquids

晶体、非晶材料和液体中活性位点的结构/性质关系

• 批准号: 4485-2013
• 负责人: Misra, Sushil
• 金额: $ 1.53万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=568356
• 关键词: Structure; property; relationships; active; sites

Magnetic properties of materials of significant interest in biology, medicine, and industry will be studied by electron magnetic resonance techniques (also referrred to as EMR/EPR/ESR) , using paramagnetic centres as probes at active sites in these materials. [This technique is based on the same principle as that of MRI (Magetic Resonance Imaging) technique used in the hospitals.] The samples to be investigated are (i) single crystals, useful as phosphors, and replacement for silicon dioxide gate dielectrics;(ii) amorphous materials in nano-structure state: Dilute magnetic semiconductors (DMS) to be used to develop spintronic devices where the charge and spin configuration can be manipulated. The oxide semiconductor DMS doped by cobalt and iron ions are among the most promising host systems. Pulsed EMR techniques [double quantum coherence (DQC), double electron-electron resonance (DEER), and electron-electron double resonance (ELDOR)] will be exploited computationally to develop the theory to measure distances in biological systems, e.g. membranes, a cutting-edge research, not possible with the X-ray technique. The objectives will be: (1) to develop materials suitable as lasers, phosphors, and materials to be used as replacement for silicon dioxide gate dielectrics. (2) to develop DMS samples as spintronic devices. (3) The bilabelled proteins project involving 2D-ELDOR and DQC/DEER techniques would lead to distance measurements in biological systems, such as membranes, a topic providing clues into blueprints of life in the human genome project. Another related project proposed to be investigated is magnetic characterization of poly-nitroxides for use as MRI and EPRI (EPR Imaging) contrast agents, magnetic rulers and quantum cubits, leading to quantum computing.

在生物学，医学和工业中具有重大兴趣材料的磁性特性将由 电子磁共振技术（也称为EMR/EPR/ESR），使用顺磁心中心作为这些材料中活性位点的探针。 [This technique is based on the same principle as that of MRI (Magetic Resonance Imaging) technique used in the hospitals.] The samples to be investigated are (i) single crystals, useful as phosphors, and replacement for silicon dioxide gate dielectrics;(ii) amorphous materials in nano-structure state: Dilute magnetic semiconductors (DMS) to be used to develop spintronic devices where the charge and可以操纵旋转配置。由钴和铁离子掺杂的氧化物半导体DM是最有前途的宿主系统之一。 脉冲EMR技术[双量子相干性（DQC），双电子电子共振（DEER）和电子电子双共振（ELDOR）]将在计算上被利用，以开发该理论以测量生物系统中的距离，例如。膜是一项尖端研究，X射线技术不可能。 目标将是：（1）开发适合用作替代二氧化硅栅极介质的激光器，磷酸盐和材料的材料。 （2）将DMS样品作为自旋设备开发。 （3）涉及2D-ELDOR和DQC/DEER技术的双铅蛋白项目将导致生物系统（例如膜）的距离测量，该主题为人类基因组项目中生命的蓝图提供了线索。 提议研究的另一个相关项目是多核氧化物的磁性表征用于MRI和EPRI（EPR成像）对比剂，磁性统治者和量子肘，从而导致量子计算。