Quantum magnetic imaging of iron biomineralisation in teeth of the chiton Acanthopleura hirtosa

McCoey, Julia M.; Matsuoka, Mirai; Gille, Robert W. de; Hall, Liam T.; Shaw, Jeremy; Broadway, David A.; Kisailus, David; Hollenberg, Lloyd C. L.; Simpson, David

doi:10.48550/arxiv.1902.09637

Cited by 2 publications

(7 citation statements)

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“…Our results may be immediately relevant to applications in precision navigation, geoscience, and medical imaging. More broadly, the use of micro-structured magnetic materials to manipulate magnetic fields offers a new dimension for diamond quantum sensors, with potential applications in magnetic microscopy [6][7][8][9][10][11][12][13] and tests of fundamental physics [48].…”

Section: Discussionmentioning

confidence: 99%

“…At the few-nanometer scale, single NV centers have been used to detect magnetic phenomena in condensed-matter [2,3] and biological [4,5] samples. At the scale of a few hundred nanometers, diamond magnetic microscopes have been used to image biomagnetism in various systems, including magnetically-labeled biomolecules [6] and cells [7,8] and intrinsically-magnetic biocrystals [9,10]. At the micrometer scale, diamond magnetometers have detected the magnetic fields produced by neurons [11], integrated circuits [12,13], and the nuclear magnetic resonance of fluids [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Diamond magnetometer enhanced by ferrite flux concentrators

Fescenko,

Jarmola,

Savukov

et al. 2019

Preprint

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Magnetometers based on nitrogen-vacancy (NV) centers in diamond are promising roomtemperature, solid-state sensors. However, their reported sensitivity to magnetic fields at low frequencies ( 1 kHz) is presently 10 pT s 1/2 , precluding potential applications in medical imaging, geoscience, and navigation. Here we show that high-permeability magnetic flux concentrators, which collect magnetic flux from a larger area and concentrate it into the diamond sensor, can be used to improve the sensitivity of diamond magnetometers. By inserting an NV-doped diamond membrane between two ferrite cones in a bowtie configuration, we realize a ∼ 250-fold increase of the magnetic field amplitude within the diamond. We demonstrate a sensitivity of ∼ 0.9 pT s 1/2 to magnetic fields in the frequency range between 10 and 1000 Hz, using a dual-resonance modulation technique to suppress the effect of thermal shifts of the NV spin levels. This is accomplished using 200 mW of laser power and 20 mW of microwave power. This work introduces a new dimension for diamond quantum sensors by using micro-structured magnetic materials to manipulate magnetic fields.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Diamond magnetometer enhanced by ferrite flux concentrators

Fescenko,

Jarmola,

Savukov

et al. 2019

Preprint

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“…Synthetic diamond chips used in QDMs are available in several cuts. The most common are diamonds with the top face along the [100 ] plane and the sides along the [100 ] or [110 ] planes (Fig. 14A).…”

Section: N + or N +mentioning

confidence: 99%

“…The NVs in these diamonds point roughly 35 • out of the plane. Less common diamond cuts include [110 ] and [111 ] top faces. The former has two NV orientations in-plane, while the latter has one NV orientation pointing normal to the face.…”

Section: N + or N +mentioning

confidence: 99%

“…This approach allows reconstruction of vector magnetic field information from the eight NV resonance frequencies. B 0 can also be aligned with the crystallographic [100] or [110] directions, such that the resonance frequencies for different NV orientations are degenerate, leading to improved contrast. If B 0 is aligned along the [100] direction with a diamond cut along [100], the magnetic field projection direction is normal to the chip, though the Zeeman shift is √ 3 times weaker than for B 0 along the [111] direction (Fig.…”

Section: Static Magnetic Fieldmentioning

confidence: 99%

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Principles and techniques of the quantum diamond microscope

et al. 2019

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We provide an overview of the experimental techniques, measurement modalities, and diverse applications of the Quantum Diamond Microscope (QDM). The QDM employs a dense layer of fluorescent nitrogen-vacancy (NV) color centers near the surface of a transparent diamond chip on which a sample of interest is placed. NV electronic spins are coherently probed with microwaves and optically initialized and read out to provide spatially resolved maps of local magnetic fields. NV fluorescence is measured simultaneously across the diamond surface, resulting in a wide-field, two-dimensional magnetic field image with adjustable spatial pixel size set by the parameters of the imaging system. NV measurement protocols are tailored for imaging of broadband and narrowband fields, from DC to GHz frequencies. Here we summarize the physical principles common to diverse implementations of the QDM and review example

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Quantum magnetic imaging of iron biomineralisation in teeth of the chiton Acanthopleura hirtosa

Cited by 2 publications

References 0 publications

Diamond magnetometer enhanced by ferrite flux concentrators

Diamond magnetometer enhanced by ferrite flux concentrators

Principles and techniques of the quantum diamond microscope

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