Self-Aligned Multilayered Nitrogen Vacancy Diamond Nanoparticles for High Spatial Resolution Magnetometry of...

Area of Science:

• Nanotechnology
• Quantum Sensing
• Materials Science

Background:

• Nitrogen vacancy diamond nanoparticles (NVNPs) are used in optical detection of magnetic resonance (ODMR) for applications like microelectronic circuit visualization and environmental sensing.
• Existing studies often use NVNP aggregates, but inherent spin misalignment limits their magnetometry capabilities compared to monocrystalline diamonds.
• A method for aligning spin orientations in NVNP aggregates could improve NV magnetometry sensitivity and simplify probe preparation.

Purpose of the Study:

• To present a novel technology for creating densely stacked NVNP monolayers with inherent interlayer alignment.
• To enable sensitive measurement of local field perturbations in microelectronic traces using aligned NVNP aggregates.
• To establish a new, accessible protocol for broad applications in micromagnetometry.

Main Methods:

• Developing a post-processing method for layering NVNPs with aligned center orientations.
• Creating densely stacked NVNP monolayers with inherent interlayer alignment.
• Characterizing the spatial properties of deposited NVNP aggregates.
• Utilizing ODMR to demonstrate the capture of magnetic dipoles from conducting microwires.

Main Results:

• Successfully created densely stacked NVNP monolayers with inherent interlayer alignment.
• Established spatial characteristics of the deposited NVNP aggregates.
• Demonstrated the ability of the aligned NVNP aggregates to capture magnetic dipoles from conducting microwires using ODMR.
• Showcased the potential for sensitive detection of local field perturbations.

Conclusions:

• The developed technology facilitates superior NV magnetometry through inherent interlayer alignment in NVNP aggregates.
• This approach offers a simplified and accessible protocol for sensitive micromagnetometry.
• The findings open new avenues for NVNP applications in microelectronics, environmental sensing, and biology.