在纳米钻石中感知室温可切换的金酸框架的旋转状态,其中有气空隙中心
Bradley T Flinn1, Graham A Rance2, William J Cull1
1School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom.
ACS nano
|February 21, 2024
概括
纳米钻石中负电荷的空位可以感知材料中的单粒子磁切换. 这种方法显示了下一代量子技术的前景,因为它允许精确的自旋探测.
科学领域:
- 量子技术是一种量子技术.
- 材料科学是一种材料科学.
- 纳米技术纳米技术
背景情况:
- 在室温磁性可切换材料对于量子技术,如自旋电子技术至关重要.
- 微型化需要用于单粒子自旋探测的分析工具.
研究的目的:
- 展示一种使用空位 (NV-) 中心在光纳米钻石 (FND) 颗粒中的方法,以探测单颗粒水平上的磁切换.
- 为了研究旋转交叉 (SCO) 金属有机框架 (MOF) 和单分子光磁铁在应对外部刺激时的磁性切换.
主要方法:
- 相对光电子显微镜与传输电子显微镜 (TEM) 寻找网用于成像和传感.
- 光学检测的磁共振 (ODMR) 和磁调制 (MM) FND光发光 (PL) 用于旋转传感 (10-30纳米范围).
- X射线光电子光谱 (XPS) 用于检测表面氧化.
主要成果:
- 在MOF 1中,ODMR/MM传感对温度诱导的SCO是不敏感的,原因是表面氧化掩盖了批量切换.
- 在MOF 1中,FND检测到电子束诱导的不可逆转转变 (AgI → Ag0,FeII → FeIII).
- NV-传感成功地检测到由405nm光触发的材料2a和2b中的可逆光磁切换.
结论:
- 在材料2a和2b中的光反过程是室温单粒子磁性切换的有希望的候选者.
- 这种基于FND的传感方法适用于下一代量子技术.
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