John W. Blanchard
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View article: AC magnetometry in the strong drive regime with NV centers in diamond
AC magnetometry in the strong drive regime with NV centers in diamond Open
Magnetic response measurements in the presence of AC drive fields provide critical insight into the properties of magnetic and conductive materials, such as phase transitions in two-dimensional van der Waals magnets, the heating efficiency…
View article: Search for Axionlike Dark Matter Using Liquid-State Nuclear Magnetic Resonance
Search for Axionlike Dark Matter Using Liquid-State Nuclear Magnetic Resonance Open
We search for dark matter in the form of axionlike particles (ALPs) in the mass range $5.576741 \,\mathrm{neV/c^2}$ - $5.577733\,\mathrm{neV/c^2}$ by probing their possible coupling to fermion spins through the ALP field gradient. This is …
View article: All-Optical Photoluminescence Spectra of Nitrogen-Vacancy Ensembles in Diamond at Low Magnetic Fields
All-Optical Photoluminescence Spectra of Nitrogen-Vacancy Ensembles in Diamond at Low Magnetic Fields Open
All-optical (AO), microwave-free magnetometry using nitrogen-vacancy (NV) centers in diamond is attractive due to its broad sample compatibility and reduced experimental complexity. In this work, we investigate room-temperature AO photolum…
View article: Enabling nondestructive observation of electrolyte composition in batteries with ultralow-field nuclear magnetic resonance
Enabling nondestructive observation of electrolyte composition in batteries with ultralow-field nuclear magnetic resonance Open
Although reliable rechargeable batteries represent a key transformative technology for electric vehicles, portable electronics, and renewable energy, there are few nondestructive diagnostic techniques compatible with realistic commercial c…
View article: Towards detection of molecular parity violation <i>via</i> chiral co-sensing: the <sup>1</sup> H/ <sup>31</sup> P model system
Towards detection of molecular parity violation <i>via</i> chiral co-sensing: the <sup>1</sup> H/ <sup>31</sup> P model system Open
A method for observing molecular parity violation using diastereomerism and co-sensing in nuclear magnetic resonance is further developed.
View article: Towards detection of molecular parity violation via chiral co-sensing: the $^1$H/$^{31}$P model system
Towards detection of molecular parity violation via chiral co-sensing: the $^1$H/$^{31}$P model system Open
Fundamental weak interactions have been shown to violate parity in both nuclear and atomic systems. However, observation of parity violation in a molecular system has proven an elusive target. Nuclear spin dependent contributions of the we…
View article: Enabling nondestructive observation of electrolyte composition in batteries with ultralow-field nuclear magnetic resonance
Enabling nondestructive observation of electrolyte composition in batteries with ultralow-field nuclear magnetic resonance Open
Although reliable rechargeable batteries represent a key transformative technology for electric vehicles, portable electronics, and renewable energy, there are few nondestructive diagnostic techniques compatible with realistic commercial c…
View article: Zero- to Ultralow-field Nuclear Magnetic Resonance
Zero- to Ultralow-field Nuclear Magnetic Resonance Open
Zero and ultralow-field nuclear magnetic resonance (ZULF NMR) is an NMR modality where experiments are performed in fields at which spin-spin interactions within molecules and materials are stronger than Zeeman interactions. This typically…
View article: Nutation-based longitudinal-sensing protocols for high-field NMR with nitrogen-vacancy centers in diamond
Nutation-based longitudinal-sensing protocols for high-field NMR with nitrogen-vacancy centers in diamond Open
Nitrogen-vacancy (N-V) centers in diamond enable nuclear magnetic resonance (NMR) spectroscopy of samples at the nano- and microscale. However, at typical tesla-scale NMR magnetic field strengths, N-V–NMR protocols become difficult to impl…
View article: Ultralow-field nuclear magnetic resonance for direct nondestructive observation of electrolyte composition in batteries
Ultralow-field nuclear magnetic resonance for direct nondestructive observation of electrolyte composition in batteries Open
Rechargeable batteries represent a key transformative technology for electric vehicles, portable electronics, and renewable energy. Despite enormous developments in battery research, there are few nondestructive diagnostic techniques compa…
View article: Robust parahydrogen-induced polarization at high concentrations
Robust parahydrogen-induced polarization at high concentrations Open
Parahydrogen-induced polarization (PHIP) is a potent technique for generating target molecules with high nuclear spin polarization. The PHIP process involves a chemical reaction between parahydrogen and a target molecule, followed by the t…
View article: Quantum Diamond Microscope for Narrowband Magnetic Imaging with High Spatial and Spectral Resolution
Quantum Diamond Microscope for Narrowband Magnetic Imaging with High Spatial and Spectral Resolution Open
The quantum diamond microscope (QDM) is a recently developed technology for near-field imaging of magnetic fields with micron-scale spatial resolution. In the present work, we integrate a QDM with a narrowband measurement protocol and a lo…
View article: Zero-field J-spectroscopy of quadrupolar nuclei
Zero-field J-spectroscopy of quadrupolar nuclei Open
Zero- to ultralow-field nuclear magnetic resonance (ZULF NMR) allows molecular structure elucidation via measurement of electron-mediated spin-spin J -couplings. This study examines zero-field J- spectra from molecules with quadrupolar nuc…
View article: Robust Parahydrogen-Induced Polarization at High Concentrations
Robust Parahydrogen-Induced Polarization at High Concentrations Open
Parahydrogen-Induced Polarization (PHIP) is a potent technique for generating target molecules with high nuclear spin polarization. The PHIP process involves a chemical reaction between parahydrogen and a target molecule, followed by the t…
View article: Enzymatic Reactions Observed with Zero- and Low-Field Nuclear Magnetic Resonance
Enzymatic Reactions Observed with Zero- and Low-Field Nuclear Magnetic Resonance Open
We demonstrate that enzyme-catalyzed reactions can be observed in zero- and low-field NMR experiments by combining recent advances in parahydrogen-based hyperpolarization methods with state-of-the-art magnetometry. Specifically, we investi…
View article: Quantum diamond microscope for dynamic imaging of magnetic fields
Quantum diamond microscope for dynamic imaging of magnetic fields Open
Wide-field imaging of magnetic signals using ensembles of nitrogen-vacancy (NV) centers in diamond has garnered increasing interest due to its combination of micron-scale resolution, millimeter-scale field of view, and compatibility with d…
View article: Solution‐State 2D NMR Spectroscopy of Mixtures HyperpolarizedUsing Optically Polarized Crystals
Solution‐State 2D NMR Spectroscopy of Mixtures HyperpolarizedUsing Optically Polarized Crystals Open
The HYPNOESYS method (Hyperpolarized NOE System), which relies on the dissolution of optically polarized crystals, has recently emerged as a promising approach to enhance the sensitivity of NMR spectroscopy in the solution state. However, …
View article: Nutation-Based Longitudinal Sensing Protocols for High-Field NMR With Nitrogen-Vacancy Centers in Diamond
Nutation-Based Longitudinal Sensing Protocols for High-Field NMR With Nitrogen-Vacancy Centers in Diamond Open
Nitrogen vacancy (NV) centers in diamond enable nuclear magnetic resonance (NMR) spectroscopy of samples at the nano- and micron scales. However, at typical tesla-scale NMR magnetic field strengths, NV-NMR protocols become difficult to imp…
View article: Parahydrogen‐Polarized [1‐<sup>13</sup>C]Pyruvate for Reliable and Fast Preclinical Metabolic Magnetic Resonance Imaging (Adv. Sci. 30/2023)
Parahydrogen‐Polarized [1‐<sup>13</sup>C]Pyruvate for Reliable and Fast Preclinical Metabolic Magnetic Resonance Imaging (Adv. Sci. 30/2023) Open
Metabolic Magnetic Resonance Imaging Hyperpolarization techniques increase nuclear spin polarization by more than four orders of magnitude, enabling metabolic MRI. In article number 2303441, Stephan Knecht, Michael Keim, Franz Schilling, I…
View article: Fast shimming algorithm based on Bayesian optimization for magnetic resonance based dark matter search
Fast shimming algorithm based on Bayesian optimization for magnetic resonance based dark matter search Open
The sensitivity and accessible mass range of magnetic resonance searches for axionlike dark matter depends on the homogeneity of applied magnetic fields. Optimizing homogeneity through shimming requires exploring a large parameter space wh…
View article: Quantum Diamond Microscope for Dynamic Imaging of Magnetic Fields
Quantum Diamond Microscope for Dynamic Imaging of Magnetic Fields Open
Wide-field imaging of magnetic signals using ensembles of nitrogen-vacancy (NV) centers in diamond has garnered increasing interest due to its combination of micron-scale resolution, millimeter-scale field of view, and compatibility with d…
View article: Parahydrogen‐Polarized [1‐ <sup>13</sup> C]Pyruvate for Reliable and Fast Preclinical Metabolic Magnetic Resonance Imaging
Parahydrogen‐Polarized [1‐ <sup>13</sup> C]Pyruvate for Reliable and Fast Preclinical Metabolic Magnetic Resonance Imaging Open
Hyperpolarization techniques increase nuclear spin polarization by more than four orders of magnitude, enabling metabolic MRI. Even though hyperpolarization has shown clear value in clinical studies, the complexity, cost and slowness of cu…
View article: Possible Applications of Dissolution Dynamic Nuclear Polarization in Conjunction with Zero- to Ultralow-Field Nuclear Magnetic Resonance
Possible Applications of Dissolution Dynamic Nuclear Polarization in Conjunction with Zero- to Ultralow-Field Nuclear Magnetic Resonance Open
The combination of a powerful and broadly applicable nuclear hyperpolarization technique with emerging (near-)zero-field modalities offer novel opportunities in a broad range of nuclear magnetic resonance spectroscopy and imaging applicati…
View article: Parahydrogen-Polarized [1-13C]Pyruvate For Reliable and Fast Preclinical Metabolic Magnetic Resonance Imaging
Parahydrogen-Polarized [1-13C]Pyruvate For Reliable and Fast Preclinical Metabolic Magnetic Resonance Imaging Open
Hyperpolarization techniques increase nuclear spin polarization by more than four orders of magnitude, enabling metabolic MRI. Even though the hyperpolarization has shown clear value in clinical studies, the complexity, cost and slowness o…
View article: Using parity-nonconserving spin-spin coupling to measure the Tl nuclear anapole moment in a TlF molecular beam
Using parity-nonconserving spin-spin coupling to measure the Tl nuclear anapole moment in a TlF molecular beam Open
An experiment utilizing a TlF molecular beam is being developed by the CeNTREX collaboration to search for hadronic interactions that violate both time-reversal ($\\mathcal{T}$) and parity ($\\mathcal{P}$) invariance. Here, we propose to u…
View article: Zero- to Ultralow-Field Nuclear Magnetic Resonance Enhanced with Dissolution Dynamic Nuclear Polarization
Zero- to Ultralow-Field Nuclear Magnetic Resonance Enhanced with Dissolution Dynamic Nuclear Polarization Open
Zero- to ultralow-field nuclear magnetic resonance is a modality of magnetic resonance experiment which does not require strong superconducting magnets. Contrary to conventional high-field nuclear magnetic resonance, it has the advantage o…
View article: Using parity-nonconserving spin-spin coupling to measure the Tl nuclear anapole moment in a TlF molecular beam
Using parity-nonconserving spin-spin coupling to measure the Tl nuclear anapole moment in a TlF molecular beam Open
An experiment utilizing a TlF molecular beam is being developed by the CeNTREX collaboration to search for hadronic interactions that violate both time-reversal (T) and parity (P) invariance. Here we propose to use the same beam to look fo…
View article: Zero- to Ultralow-Field Nuclear Magnetic Resonance Enhanced with Dissolution Dynamic Nuclear Polarization
Zero- to Ultralow-Field Nuclear Magnetic Resonance Enhanced with Dissolution Dynamic Nuclear Polarization Open
Zero- to ultralow-field nuclear magnetic resonance is a modality of magnetic resonance experiment which does not require strong superconducting magnets. Contrary to conventional high-field nuclear magnetic resonance, it has the advantage o…
View article: Radio-Frequency Sweeps at μT Fields for Parahydrogen-Induced Polarization of Biomolecules
Radio-Frequency Sweeps at μT Fields for Parahydrogen-Induced Polarization of Biomolecules Open
Magnetic resonance imaging of $^{13}$C-labeled metabolites enhanced by parahydrogen-induced polarization (PHIP) can enable real-time monitoring of processes within the body. We introduce a robust, easily implementable technique for transfe…
View article: Metabolic Reactions Studied by Zero- and Low-Field Nuclear Magnetic Resonance
Metabolic Reactions Studied by Zero- and Low-Field Nuclear Magnetic Resonance Open
State-of-the-art magnetic resonance imaging uses hyperpolarized molecules to track metabolism in vivo, but large superconducting magnets are required, and the strong magnetic fields largely preclude measurement in the presence of conductiv…