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.

这个跨学科项目旨在开发和使用基于扭矩磁力检测的高灵敏度、宽带、高频电子自旋共振谱仪。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，并对谱仪进行优化。作为测量协议，零偏转测量功能的实施将增加动态范围，而软悬臂和替代检测方案将提高灵敏度，这将使我们能够进行高度敏感的频率、场和角度相关的测量。在自旋数量有限的“现实生活”样品上的高频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的高自旋、高各向异性中心。