Gokhale Yash, Coventry Brandon S, Rogers Tsani, Lines Maya, Vena Anna, Phillips Jack, Zhu Tianxiang, Bok Ilhan, Troche Dariana, Glodowski Mitchell, Vareberg Adam, Bhatt Suyash, Ashtiani Alireza Ousati, Eliceiri Kevin W, Hai Aviad
Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States.
Wisconsin Institute for Translational Neuroengineering, University of Wisconsin-Madison, Madison, Wisconsin 53792, United States.
Nano Lett. 2025 Jun 11;25(23):9204-9213. doi: 10.1021/acs.nanolett.5c00656. Epub 2025 May 19.
Nitrogen vacancy diamond nanoparticles (NVNPs) are increasingly integrated with methods for optical detection of magnetic resonance (ODMR), providing new opportunities spanning the visualization of magnetic fields in microelectronic circuits, environmental sensing, and biology. However, only a small number of studies utilize aggregates of NVNPs for surface-wide magnetometry, with the fact that spin orientations in aggregate NVNPs are inherently misaligned, precluding proper magnetic field detection, compared with expensive monocrystalline diamonds. A post-processing method for layering NVNPs with aligned center orientations can potentially facilitate superior NV magnetometry by allowing sensitive detection with a simplified probe preparation. We present novel technology for creating densely stacked NVNP monolayers with inherent interlayer alignment for sensitive measurement of local field perturbations in microelectronic traces. We establish spatial characteristics of deposited aggregates and demonstrate their ability to capture dipoles from conducting microwires via ODMR. Our approach forms a novel accessible protocol that can be used for broad applications in micromagnetometry.
氮空位金刚石纳米颗粒（NVNPs）越来越多地与磁共振光学检测（ODMR）方法相结合，为微电子电路中的磁场可视化、环境传感和生物学等领域带来了新机遇。然而，只有少数研究利用NVNPs聚集体进行表面全域磁力测量，与昂贵的单晶金刚石相比，聚集体NVNPs中的自旋取向本质上是不对齐的，这妨碍了对磁场的正确检测。一种用于将NVNPs以对齐的中心取向分层的后处理方法，通过简化探针制备实现灵敏检测，有可能促进卓越的NV磁力测量。我们展示了一种新技术，用于创建具有固有层间对齐的密集堆叠NVNP单层，以灵敏测量微电子迹线中的局部场扰动。我们确定了沉积聚集体的空间特征，并证明了它们通过ODMR从导电微线捕获偶极子的能力。我们的方法形成了一种新颖且易于使用的方案，可用于微磁测量的广泛应用。
