Pushing the limits of torque-detected electron-spin resonance

突破扭矩检测电子自旋共振的极限

• 批准号: 221209774
• 负责人: Professor Dr. Martin Dressel
• 金额: --
• 依托单位: Department of Materials
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/221209774?language=en
• 关键词: Pushing; limits; torque; detected; electron

This interdisciplinary project aims to develop and employ a highly sensitive, broadband, highfrequency electron spin resonance spectrometer based on torque magnetometric detection. Starting from our recent preliminary work, we will first extend the applicability of torque-detected ESR, and optimize the spectrometer as well as the measurement protocol. The implementation of zero-deflection measurement capabilities will increase the dynamic range, while soft cantilevers and alternative detection schemes improve the sensitivity. This will enable us to carry out highly sensitive frequency-, field-, and angle-dependent measurements at high-frequencies on “real life” samples with limited numbers of spins. These samples include surface arrays of spin centers, and high-spin, high-anisotropy centers in the active sites of metalloproteins.

这个跨学科的项目旨在开发和使用一个高灵敏度，宽带，高频电子自旋共振谱仪的基础上转矩磁力检测。从我们最近的前期工作开始，我们将首先扩展扭矩检测ESR的适用性，并优化光谱仪以及测量协议。零偏转测量能力的实现将增加动态范围，而软杠杆和替代检测方案将提高灵敏度。这将使我们能够进行高灵敏度的频率，字段和角度依赖的测量在高频率上的“真实的”样品与有限数量的自旋。这些样品包括自旋中心的表面阵列，以及金属蛋白活性位点中的高自旋、高各向异性中心。