An 8-Channel 13GHz ESR-on-a-Chip Injection-locked VCO-array achieving 200μM-Concentration Sensitivity

📋 论文概要

本文提出了一种8通道13GHz的电子自旋共振片上系统，采用注入锁定压控振荡器阵列，实现了200μM的浓度灵敏度。该系统解决了传统ESR设备体积大、成本高的问题，为生命科学和材料科学研究提供了紧凑的片上解决方案。

💡 主要创新点

• 首次将注入锁定VCO阵列用于ESR检测，实现了8通道并行工作，提高了灵敏度。
• 在13GHz频段实现片上ESR系统，避免了外部微波组件，大幅降低系统复杂度和成本。

🏷 关键词

📄 原文摘要

University of Stuttgart, Stuttgart, Germany 1 2 Thanks to their unmatched specificity, methods based on magnetic resonance effects are amongst the most powerful spectroscopic techniques available today. Out of these methods, due to the availability of improved electronics at the required frequencies in the tens of GHz region, electron spin resonance (ESR) spectroscopy is gaining significant attention in the research community as a tool in life science and materials science research. The principle of a frequency-sensitive ESR measurement is illustrated as part of Fig. 21.6.1. In such a measurement, optimizing the sensor’s limit of detection (LOD) is crucial because inductively detected ESR suffers from the very small sample polarization under typical experimental conditions. To overcome this

👥 作者与机构

Anh Chu1,3, Benedikt Schlecker1,3, Klaus Lips2, Maurits Ortmanns1,

Jens Anders1,3 University of Ulm, Ulm, Germany Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany 3