Challenges and prospects of in situ nuclear magnetic resonance for electrochemistry devices

Castelletto, Stefania; Boretti, Alberto

doi:10.1016/j.mtener.2022.101210

Cited by 4 publications

(2 citation statements)

References 74 publications

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“…In addition to advancing our fundamental understanding of interfacial processes on spin defects in diamond, we anticipate a range of potential applications, such as electrolyte sensing in cell biology, 60 neuroscience, 61 or electrochemistry. 62…”

Section: Discussionmentioning

confidence: 99%

The Role of Electrolytes in the Relaxation of Near-Surface Spin Defects in Diamond

et al. 2023

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Quantum sensing with spin defects in diamond, such as the nitrogen vacancy (NV) center, enables the detection of various chemical species on the nanoscale. Molecules or ions with unpaired electronic spins are typically probed by their influence on the NV center’s spin relaxation. Whereas it is well-known that paramagnetic ions reduce the NV center’s relaxation time (T 1), here we report on the opposite effect for diamagnetic ions. We demonstrate that millimolar concentrations of aqueous diamagnetic electrolyte solutions increase the T 1 time of near-surface NV center ensembles compared to pure water. To elucidate the underlying mechanism of this surprising effect, single and double quantum NV experiments are performed, which indicate a reduction of magnetic and electric noise in the presence of diamagnetic electrolytes. In combination with ab initio simulations, we propose that a change in the interfacial band bending due to the formation of an electric double layer leads to a stabilization of fluctuating charges at the interface of an oxidized diamond. This work not only helps to understand noise sources in quantum systems but could also broaden the application space of quantum sensors toward electrolyte sensing in cell biology, neuroscience, and electrochemistry.

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Section: Discussionmentioning

confidence: 99%

The Role of Electrolytes in the Relaxation of Near-Surface Spin Defects in Diamond

et al. 2023

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“…In this context, for spin defects quantum sensor, the magnetic field sensitive area can be as small as one atom, providing great spatial resolution [187]. However, the detection limit of these methods compared to classical ones is always a trade-off between resolution (spatial, spectral or other) and small detection volume, as shown for instance in the case of the use of NV in diamond for nuclear NMR [188], when compared to classical methods at the microscale.…”

Section: Discussionmentioning

confidence: 99%

Quantum systems in silicon carbide for sensing applications

Castelletto,

Lew,

Lin

et al. 2023

Rep. Prog. Phys.

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This paper summarizes recent studies identifying key qubit systems in silicon carbide (SiC) for quantum sensing of magnetic, electric fields, and temperature at the nano and microscale. The properties of colour centres in SiC, that can be used for quantum sensing, are reviewed with a focus on paramagnetic colour centres and their spin Hamiltonians describing Zeeman splitting, Stark effect, and hyperfine interactions. These properties are then mapped onto various methods for their initialization, control, and read-out. We then summarised methods used for a spin and charge state control in various colour centres in SiC. These properties and methods are then described in the context of quantum sensing applications in magnetometry, thermometry, and electrometry. Current state-of-the art sensitivities are compiled and approaches to enhance the sensitivity are proposed. The large variety of methods for control and read-out, combined with the ability to scale this material in integrated photonics chips operating in harsh environments, places SiC at the forefront of future quantum sensing technology based on semiconductors.

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Quantum sensors in diamonds for magnetic resonance spectroscopy: Current applications and future prospects

Rizzato,

von Grafenstein,

Bucher

2023

Applied Physics Letters

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Nuclear magnetic resonance (NMR) and electron spin resonance (ESR) methods are indispensable techniques that utilize the spin of particles to probe matter, with applications in various disciplines, including fundamental physics, chemistry, biology, and medicine. Despite their versatility, the technique's sensitivity, particularly for NMR, is intrinsically low, which typically limits the detection of magnetic resonance (MR) signals to macroscopic sample volumes. In recent years, atom-sized magnetic field quantum sensors based on nitrogen-vacancy (NV) centers in diamond paved the way to detect MR signals at the micro- and nanoscale, even down to a single spin. In this perspective, we offer an overview of the most promising directions in which this evolving technology is developing. Significant advancements are anticipated in the life sciences, including applications in single molecule and cell studies, lab-on-a-chip analytics, and the detection of radicals or ions. Similarly, NV-MR is expected to have a substantial impact on various areas in the materials research, such as surface science, catalysis, 2D materials, thin films, materials under extreme conditions, and quantum technologies.

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Challenges and prospects of in situ nuclear magnetic resonance for electrochemistry devices

Cited by 4 publications

References 74 publications

The Role of Electrolytes in the Relaxation of Near-Surface Spin Defects in Diamond

The Role of Electrolytes in the Relaxation of Near-Surface Spin Defects in Diamond

Quantum systems in silicon carbide for sensing applications

Quantum sensors in diamonds for magnetic resonance spectroscopy: Current applications and future prospects

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