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根据扭矩磁力测定检测来开发和采用高度敏感的，宽带的高频旋转共振光谱仪。从最近的初步工作开始，我们将首先扩展扭矩检测的ESR的适用性，并优化光谱仪以及测量协议。零反射测量能力的实现将增加动态范围，而软悬臂和替代检测方案提高了灵敏度。这将使我们能够在具有有限的自旋数量的“现实生活”样本上进行高频频率，磁场和角度依赖性测量。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，高肛门的中心。