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Download fileSynthesis and Quantum Metrology of Metal–Organic Framework-Coated Nanodiamonds Containing Nitrogen Vacancy Centers
journal contribution
posted on 2021-08-12, 19:44 authored by Roman A. Shugayev, Scott E. Crawford, John P. Baltrus, Nathan A. Diemler, James E. Ellis, Ki-Joong Kim, Patricia C. CveticFluorescent
nanodiamonds (NDs) containing nitrogen vacancy centers
(NV) have promising applications in quantum sensing, quantum computing,
catalytic, and imaging applications. Functionalization of NDs with
an ordered, porous coating can provide well-defined sites for ND immobilization
and analyte interaction with the ND surface, furnishing a tunable
environment for quantum applications and catalysis. Here, a facile
strategy for functionalizing NV NDs with the biocompatible zeolitic
imidazole framework-8 (ZIF-8) metal–organic framework (MOF)
is demonstrated. The composites were structurally characterized by
electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy,
indicating the formation of well-dispersed ND three-dimensional structures
supported by a MOF matrix. Crucially, the fluorescence and optically
detected magnetic resonance properties were preserved following ZIF-8
encapsulation, while spin relaxometry studies indicate that MOF functionalization
lengthens the spin longitudinal relaxation time T1, a critical quantum parameter for sensing applications.
We further demonstrate that the average number of NDs per MOF can
be controlled by increasing the concentration of NDs used in the synthesis.
The tunable design of NDs@MOF materials has important implications
for quantum sensing, quantum computing, and related applications,
and the synthetic strategy and optical characterization data presented
here provide a foundation for future exploration of ND@MOF systems.
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Keywords
well-dispersed NDelectron microscopyrelaxometry studiesresonance propertiescharacterization dataZIF -8 encapsulationND surfaceX-ray diffractionrelaxation time T 1functionalizing NV NDsnitrogen vacancy centersimaging applicationsanalyte interactiontunable designquantum parameterND immobilizationquantum applicationsbiocompatible zeolitic imidazole fr...tunable environmentQuantum MetrologyX-ray photoelectron spectroscopyMOF matrixfuture explorationMOF functionalization