Method for In-Solution, High-Throughput T1 Relaxometry Using Fluorescent Nanodiamonds

• DOI: 10.1103/physrevapplied.20.034018
• Publication Date: 2023-09-11T15:03:24Z
• Authors: Erin S. Grant; Mina Barzegar Ami...; Yang Li; Ella P. Walsh; Gawain McColl; Liam T. Hall; David A. Simpson

Fluorescent nanodiamonds (FNDs) have been exploited as sensitive quantum probes for nanoscale chemical and biological sensing applications, with the majority of demonstrations to date relying on detection single FNDs containing either nitrogen vacancies or nitrogen-vacancy ensembles. This places significant limits measurement time, throughput statistical significance a measured result there is usually marked inhomogeneity within FND samples. Here, we developed platform that can report ${T}_{1}$ spin relaxation time from large ensemble in solution. We first describe refined protocol this modality then use it identify optimal size paramagnetic targets. Our approach simple set up, robust be used rapid material characterization variety in-situ applications.