Nicholas Nunn
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Optimizing ensemble NV− spin properties of fluorescent diamond microparticles by systematic low pressure high temperature annealing Open
Low pressure high temperature annealing is a means for driving nitrogen and defect diffusion in diamond to reduce internal lattice damage without the need for technically complicated high-pressure cells. Herein, we perform a systematic tim…
View article: Electronic Spin Relaxation and Clustering in High-Pressure High-Temperature Synthesized Microcrystalline Diamond Particles with Reduced Nitrogen Content
Electronic Spin Relaxation and Clustering in High-Pressure High-Temperature Synthesized Microcrystalline Diamond Particles with Reduced Nitrogen Content Open
The negatively charged Nitrogen-vacancy (NV-) color center in diamond is widely studied because of numerous applications of this unique quantum system in sensing and quantum information sciences. While substitutional nitrogen is required t…
View article: High-precision chemical quantum sensing in flowing monodisperse microdroplets
High-precision chemical quantum sensing in flowing monodisperse microdroplets Open
A method is presented for high-precision chemical detection that integrates quantum sensing with droplet microfluidics. Using nanodiamonds (ND) with fluorescent nitrogen-vacancy (NV) centers as quantum sensors, rapidly flowing microdroplet…
View article: High-precision chemical quantum sensing in flowing monodisperse microdroplets
High-precision chemical quantum sensing in flowing monodisperse microdroplets Open
We report on a novel flow-based method for high-precision chemical detection that integrates quantum sensing with droplet microfluidics. We deploy nanodiamond particles hosting fluorescent nitrogen vacancy defects as quantum sensors in flo…
Measuring local pH at interfaces from molecular tumbling: A concept for designing EPR-active pH-sensitive labels and probes Open
EPR-based local pH measurements based on changes in rotational dynamics of spin-bearing molecules upon protonation.
View article: Optical and electronic spin properties of fluorescent micro- and nanodiamonds upon prolonged ultrahigh-temperature annealing
Optical and electronic spin properties of fluorescent micro- and nanodiamonds upon prolonged ultrahigh-temperature annealing Open
High-temperature annealing is a promising but still mainly unexplored method for enhancing spin properties of negatively charged nitrogen-vacancy (NV) centers in diamond particles. After high-energy irradiation, the formation of NV centers…
Clot Imaging Using Photostable Nanodiamond Open
While thrombosis is the leading cause of morbidity and mortality in the United States, an understanding of its triggers, progression, and response to anticoagulant therapy is lacking. Intravital fluorescence microscopy has advanced the stu…
Electron irradiation-induced paramagnetic and fluorescent defects in type Ib high pressure–high temperature microcrystalline diamonds and their evolution upon annealing Open
Defects introduced to synthetic type Ib diamond micrometer-size particles by electron-beam irradiation were studied by electron paramagnetic resonance and photoluminescence (PL) spectroscopy as a function of e-beam fluence and post-irradia…
Femtosecond Optical Nonlinearity of Nanodiamond Suspensions Open
High pressure-high temperature (HP-HT) nanodiamonds and detonation nanodiamonds have unique optical properties and are promising materials for various applications in photonics. In this work, for the first time, comparative studies of the …
Enhanced Optical <sup>13</sup> C Hyperpolarization in Diamond Treated by High‐Temperature Rapid Thermal Annealing Open
Methods of optical dynamic nuclear polarization open the door to the replenishable hyperpolarization of nuclear spins, boosting their nuclear magnetic resonance/imaging signatures by orders of magnitude. Nanodiamond powder rich in negative…
High Temperature Treatment of Diamond Particles Toward Enhancement of Their Quantum Properties Open
Fluorescence of the negatively charged nitrogen-vacancy (NV-) center of diamond is sensitive to external electromagnetic fields, lattice strain, and temperature due to the unique triplet configuration of its spin states. Their use in parti…
Low-Power Laser Graphitization of High Pressure—High Temperature Nanodiamond Films Open
Laser-induced graphitization of 100 nm monocrystals of diamond particles synthesized by high-pressure high-temperature (HP-HT) methods is not typically observed. The current study demonstrates the graphitization of 150 nm HP-HT nanodiamond…
Laser modification of high-pressure high-temperature nanodiamonds Open
Micro-thin semitransparent films of purified high pressure high temperature nanodiamonds were produced on a glass substrate. A focused 632.8 nm He-Ne laser irradiation is shown to cause an emission of light in the green region of the optic…
High temperature annealing enhanced diamond 13C hyperpolarization at room temperature Open
Methods of optical dynamic nuclear polarization (DNP) open the door to the replenishable hyperpolarization of nuclear spins, boosting their NMR/MRI signature by orders of magnitude. Nanodiamond powder rich in negatively charged Nitrogen Va…
A Perspective on Fluorescent Nanodiamond Bioimaging Open
The field of fluorescent nanodiamonds (FNDs) has advanced greatly over the past few years. Though historically limited primarily to red fluorescence, the wavelengths available for nanodiamonds have increased due to continuous technical adv…
Fluorescent Diamond Particles: From Fancy Blue to Red: Controlled Production of a Vibrant Color Spectrum of Fluorescent Diamond Particles (Adv. Funct. Mater. 19/2019) Open
In article number 1808362, Olga Shenderova and co-workers achieve rapid thermal annealing of electron-irradiated diamond particulates to specific temperatures, which provides controlled and highly reproducible formation of specific color c…
Review Article: Synthesis, properties, and applications of fluorescent diamond particles Open
Diamond particles containing color centers—fluorescent crystallographic defects embedded within the diamond lattice—outperform other classes of fluorophores by providing a combination of unmatched photostability, intriguing coupled magneto…
View article: Targeting Fluorescent Nanodiamonds to Vascular Endothelial Growth Factor Receptors in Tumor
Targeting Fluorescent Nanodiamonds to Vascular Endothelial Growth Factor Receptors in Tumor Open
The increased expression of vascular endothelial growth factor (VEGF) and its receptors is associated with angiogenesis in a growing tumor, presenting potential targets for tumor-selective imaging by way of targeted tracers. Though fluores…
Brilliant blue, green, yellow, and red fluorescent diamond particles: synthesis, characterization, and multiplex imaging demonstrations Open
Rapid thermal annealing of electron irradiated nanoscale type Ib diamond particles facilitates formation of various nitrogen-related fluorescent color centers, providing either red, yellow, green, or blue fluorescence for downstream multip…
Optical limiting in nanodiamond suspension: shortening of the laser pulses Open
Optical limiting (OL) in an aqueous suspension of nanodiamonds (NDs) with an average nanoparticle size of 20 nm is studied and the results are presented. NDs are obtained by grinding the micron-sized diamond powders manufactured by static …
A phantom study of terahertz spectroscopy and imaging of micro- and nano-diamonds and nano-onions as contrast agents for breast cancer Open
THz imaging is effective in distinguishing between cancerous, healthy, and fatty tissues in breast tumors, but a challenge remains in the contrast between cancerous and fibroglandular (healthy) tissues. This work investigates carbon-based …
Atomic and Electronic Structures of Functionalized Nanodiamond Particles Open
Journal Article Atomic and Electronic Structures of Functionalized Nanodiamond Particles Get access Shery L Y Chang, Shery L Y Chang LeRoy Eyring Center for Solid State Science, Arizona State University, Tempe, AZ 85287, United States Sear…
Unusual Water Hydrogen Bond Network around Hydrogenated Nanodiamonds Open
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