Article
Physics, Applied
Chikara Shinei, Masashi Miyakawa, Shuya Ishii, Seiichi Saiki, Shinobu Onoda, Takashi Taniguchi, Takeshi Ohshima, Tokuyuki Teraji
Summary: The charge states of NV centers in diamond single crystals were investigated based on concentrations of neutral substitutional nitrogen (N-s(0)) and NVT centers. It was found that NV centers were fully negatively charged when the ratio of NVT to N-s(0) was 1%-20%, and NV0 centers appeared gradually when the ratio exceeded 20%-30%.The concentration ratio between NV- centers and NV0 centers was described using an equilibrium equation.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Zhiping Ju, Mengting He, Junjie Lin, Jing Zhu, Botao Wu, E. Wu
Summary: This study explores the two-photon fluorescence imaging technique of fluorescent nanodiamonds, achieving high imaging resolution and axial resolution with a picosecond pulsed laser operating at 1032nm. It demonstrates the advantages of high spatial resolution and high signal-to-noise ratio, and reveals the energy level characteristics of fluorescent nanodiamonds.
RESULTS IN PHYSICS
(2022)
Article
Optics
Y. Shimotsuma, K. Kinouchi, R. Yanoshita, M. Fujiwara, N. Mizuochi, M. Uemoto, M. Shimizu, K. Miura
Summary: The NV centers in a diamond were successfully created using a femtosecond laser single pulse. The effect of different laser pulse widths on the diamond lattice was investigated both experimentally and theoretically. Interestingly, despite the high thermal conductivity of a diamond, a suitable pulse repetition rate of several tens kHz was found for the formation of NV center ensembles by femtosecond laser pulse irradiation.
Article
Materials Science, Multidisciplinary
Mark E. Turiansky, Chris G. Van de Walle
Summary: In this study, first-principles calculations are used to investigate V-B-C-B and V-B-Si-B complexes in cubic boron nitride as potential quantum defects. It is found that these complexes possess a triplet ground-state spin similar to the NV center in diamond, and their main optical transition occurs in the telecom O-band, making them attractive for quantum networking applications.
Article
Optics
N. S. Kurochkin, S. A. Savinov, Dongxue Bi, V. V. Sychev, S. P. Eliseev, A. Gritsienko
Summary: The luminescent and morphological properties of milled high-pressure high-temperature nitrogen-vacancy (NV) center nanodiamonds on a glass substrate were investigated, showing the presence of luminescence of NV- and NV0 centers, as well as the fundamental diamond Raman peak. Photoluminescence and Raman spectra studies of a nanodiamond powder were carried out, with the estimation of photoluminescence lifetimes of NV centers and observation of single-emitter behavior of these centers under laser scanning confocal fluorescence microscopy. The saturation count rate of a single NV center was found to be approximately 250 kcounts/s.
JOURNAL OF RUSSIAN LASER RESEARCH
(2021)
Article
Optics
N. S. Kurochkin, S. A. Savinov, Dongxue Bi, V. V. Sychev, S. P. Eliseev, A. Gritsienko
Summary: By studying the color centers in nanodiamonds, researchers have discovered the luminescence of NV and NV0 centers, as well as the presence of the fundamental diamond Raman peak. Photoluminescence lifetimes of NV centers were estimated under specific wavelength excitation, and the single-emitter behavior of these centers was demonstrated.
JOURNAL OF RUSSIAN LASER RESEARCH
(2021)
Article
Spectroscopy
Andrey G. Yashenkin, Oleg I. Utesov, Sergei V. Koniakhin
Summary: Using a microscopic theory, recent research revised Raman data on nanocrystallite arrays, explaining the large width of Raman peaks in nanoparticles compared to bulk materials. The theory successfully extracted four important microscopic characteristics of nanopowder, demonstrating its capability in analyzing nanocrystallites.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Review
Biochemical Research Methods
Anusuya Boruah, Binoy K. Saikia
Summary: In the past few years, fluorescent nanodiamonds (FNDs) have seen significant development as a new member of the nanocarbon family. FNDs have unique properties, such as photostability, bio-compatibility, and excellent optical and mechanical properties, making them attractive for various applications in fields like bio-imaging, drug delivery, cancer treatment, and spin electronics. FNDs contain crystallographic defects that give them intriguing properties, with the negatively charged nitrogen vacancy center (NV-) being the most studied defect. This review highlights the advantages of FNDs with NV- centers produced through different methods and summarizes recent developments in functionalization and applications in the field of biological science.
JOURNAL OF FLUORESCENCE
(2022)
Article
Materials Science, Multidisciplinary
Jin-Xu Qin, Xi-Gui Yang, Chao-Fan Lv, Yi-Zhe Li, Kai-Kai Liu, Jin-Hao Zang, Xun Yang, Lin Dong, Chong-Xin Shan
Summary: Nanodiamonds have excellent properties for various potential applications in nanomedicine, with significant progress being made in recent years, especially in bioimaging, drug delivery, and biosensing. There is a promising outlook for their future developments and applications.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Vadzim Chayeuski, Abdelhafed Taleb, Valery Zhylinski, Andrei Kuleshov, Roman Shtempliuk
Summary: This paper presents the results of a study on the preparation and characterization of a Cr-DND/MoN detonation chromium-nanodiamond coating deposited on cemented tungsten carbide mill blades using Arc-PVD and electrodeposition methods. The coating consists of Cr-DND, Cu, and MoN layers, and exhibits high microhardness and good adhesion.
Article
Chemistry, Multidisciplinary
Tianli Wu, Xixi Chen, Zhiyong Gong, Jiahao Yan, Jinghui Guo, Yao Zhang, Yuchao Li, Baojun Li
Summary: Intracellular thermometry using fluorescent nanodiamond microspheres as temperature probes, aggregated through optical forces and exhibiting electromagnetic resonance enhancement, enables precise positioning and temperature measurement within living cells. This approach offers potential applications for high-precision and flexible single-cell analysis.
Article
Optics
Mantas Zurauskas, Aneesh Alex, Jaena Park, Steve R. Hood, Stephen A. Boppart
Summary: This study presents a nanodiamond-based calibration target for microscopy, designed to support day-to-day instrumentation development efforts in microscopy laboratories and provide imaging performance information in phantom images to ensure consistent performance of microscopy systems.
PHOTONICS RESEARCH
(2021)
Article
Physics, Applied
Chikara Shinei, Yuta Masuyama, Masashi Miyakawa, Hiroshi Abe, Shuya Ishii, Seiichi Saiki, Shinobu Onoda, Takashi Taniguchi, Takeshi Ohshima, Tokuyuki Teraji
Summary: In this study, the spin-echo coherence times of negatively charged nitrogen vacancy center (NV-) ensembles in single-crystalline diamond were investigated. The study focused on the magnetic dipole-dipole interaction (DDI) from different electronic spin baths that cause decoherence. The results showed that nitrogen-related paramagnetic defects are the main source of decoherence in the ensemble NV- center, with the coherence time decreasing in inverse proportion to the concentration of these defects.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Taras Plakhotnik, Tim Duka, Valery A. Davydov, Viatcheslav N. Agafonov
Summary: In this study, doping and formation of luminescent point defects in nanodiamond at high pressures and temperatures were investigated. It was found that the concentration of silicon-vacancy centers (SiV-) increases proportionally to the diameter of the nanocrystals. The local concentration of the dopant in the crystal also linearly increases with the distance from the crystal center. This phenomenon can be explained by the competition between crystal growth and doping.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Physics, Condensed Matter
E. A. Ekimov, M. V. Kondrin
Summary: In this study, we thoroughly investigated the vacancy-impurity complexes in 0.65 nm thick diamond nanocrystals and compared them with those in diamond nanofilms and bulk crystals. The results showed that the formation energy of these complexes in nanoobjects is lower than that in bulk crystals, and confinement effects significantly affect the band structure of nanoobjects.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Nanoscience & Nanotechnology
Minh Nguyen, Tongtong Zhu, Mehran Kianinia, Fabien Massabuau, Igor Aharonovich, Milos Toth, Rachel Oliver, Carlo Bradac
Article
Optics
James White, Cyril Laplane, Reece P. Roberts, Louise J. Brown, Thomas Volz, David W. Inglis
Article
Cardiac & Cardiovascular Systems
Ehsan Kachooei, Nicole M. Cordina, Phani R. Potluri, Joanna A. Guse, Dane McCamey, Louise J. Brown
Summary: Through paramagnetic spin labeling method, the interaction between NH2-TnI region and TnC N-domain is studied, suggesting phosphorylation-induced changes in the orientation of TnC N-domain under saturating Ca2+ conditions. This allosteric model proposes that phosphorylation triggers cooperative changes in the interaction of NH2-TnI region with TnC, leading to the release of TnI switch-peptide and enhancement of myocardial relaxation rate.
JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY
(2021)
Article
Multidisciplinary Sciences
Andreas Gottscholl, Matthias Diez, Victor Soltamov, Christian Kasper, Andreas Sperlich, Mehran Kianinia, Carlo Bradac, Igor Aharonovich, Vladimir Dyakonov
Summary: The research team successfully realized coherent control of ensembles of boron vacancy centers in hexagonal boron nitride (hBN) and measured the spin characteristics at different temperatures. They proposed a method to substantially reduce the magnetic resonance linewidth, providing important insights for the employment of van der Waals materials in quantum technologies.
Article
Biophysics
Shiying Zhu, Ehsan Kachooei, Jeffrey R. Harmer, Louise J. Brown, Frances Separovic, Marc-Antoine Sani
Summary: The combination of in-cell solid-state dynamic nuclear polarization (DNP) NMR and cryogenic temperatures allows for the delivery of a radical source into cells via nitroxide-tagged peptide, enabling in situ biophysical studies of antimicrobial peptides. This study investigated the structure, localization, and signal enhancement properties of spin-labeled Mac1 analogs within micelles or lipid vesicles, with the double spin-labeled peptide achieving better NMR enhancements. Molecular dynamics simulations supported the observations and provided further structural insights.
BIOPHYSICAL JOURNAL
(2021)
Article
Multidisciplinary Sciences
Jeson Chen, Oliver Y. Chen, Huan-Cheng Chang
Summary: The study focuses on the baseline decay of dense spin ensembles in diamond under continuously driving microwave (MW) and finds that the baseline decay times of NV- spins decrease with the increasing MW field strength, displaying a Lorentzian-like spectrum in decay times dependence on MW detuning. The experimental findings are consistent with simulations for a simple two-level system, providing new insights into fundamental spin relaxation processes under continuous driving electromagnetic fields.
SCIENTIFIC REPORTS
(2021)
Article
Instruments & Instrumentation
Jeson Chen, Thorsten Maly
Summary: This paper describes a compact polarization transforming reflector (PTR) that can be easily tuned over a broad frequency range and integrated into quasi-optical systems. By varying the distance and orientation of the wire grid, the PTR can convert the polarization state of an incident beam and be used as a universal polarizer.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Optics
Jeson Chen, Si-Yu Huang, Cheng-Yu Lin, Wen-Fung Liu
Summary: The low-frequency magnetic-field sensor based on FBGs demonstrated in the experiment operates by measuring the strain exerted by a loaded magnet on the sensing structure, resulting in wavelength shifts. It has a sensitivity of 8.16 pm/G and a resolution of 3 Gauss, making it suitable for DC to low-frequency magnetic sensing applications.
Review
Biotechnology & Applied Microbiology
Samuel J. King, Ante Jerkovic, Louise J. Brown, Kerstin Petroll, Robert D. Willows
Summary: Hydrogen is a clean alternative to fossil fuels and has various applications. Currently, hydrogen is mainly produced from coal and natural gas, so developing alternative methods that do not use fossil fuels is necessary. Biological manufacturing of hydrogen using enzymes called hydrogenases shows promise as a clean and renewable solution. However, limitations in the hydrogen production pathways of algae have hindered commercial implementation. Recent advancements in synthetic biology and high-throughput screening assays have shown potential for improving algal hydrogen production efficiency.
MICROBIAL BIOTECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Yongliang Chen, Simon White, Evgeny A. Ekimov, Carlo Bradac, Milos Toth, Igor Aharonovich, Toan Trong Tran
Summary: We present an ultralow-power, optical thermometry technique for cryogenic temperatures using a two-level system in nanodiamonds. This technique achieves a relative sensitivity of about 20% K-1 at 5 K, higher than other optical nanothermometry methods, while employing excitation powers of just a few tens of nanowatts. We demonstrate its ability to accurately measure temperature differences at various locations on a custom-made microcircuit. This study is significant for the advancement of nanoscale optical thermometry at cryogenic temperatures.
Review
Materials Science, Multidisciplinary
Dylan G. Stone, Carlo Bradac
Summary: This work discusses and analyzes the role of machine and quantum learning in the development of diamond-based quantum technologies. It demonstrates that these learning techniques have led to practical and fundamental improvements in measurement speed and accuracy, which are crucial for quantum applications, especially those with limited coherence time and signal-to-noise ratio.
MATERIALS FOR QUANTUM TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jeffrey R. Reimers, Jun Shen, Mehran Kianinia, Carlo Bradac, Igor Aharonovich, Michael J. Ford, Piotr Piecuch
Article
Quantum Science & Technology
Richard Nelz, Mariusz Radtke, Abdallah Slablab, Zai-Quan Xu, Mehran Kianinia, Chi Li, Carlo Bradac, Igor Aharonovich, Elke Neu
ADVANCED QUANTUM TECHNOLOGIES
(2020)
Article
Materials Science, Multidisciplinary
T. Boele, D. E. J. Waddington, T. Gaebel, E. Rej, A. Hasija, L. J. Brown, D. R. McCamey, D. J. Reilly
Article
Materials Science, Biomaterials
Alfonso E. Garcia-Bennett, Arun Everest-Dass, Irene Moroni, Ishan Das Rastogi, Lindsay M. Parker, Nicolle H. Packer, Louise J. Brown
JOURNAL OF MATERIALS CHEMISTRY B
(2019)
Article
Materials Science, Multidisciplinary
Shuanghui Zeng, Xue Wang, Yunqian Zhang, Jiaojing Shao, Zhao Ding, Jie Zhao
Summary: A free-standing 3D core/shell composite material CNTs@Co9S8 on nickel mesh has been prepared using a simple two-step method. The composite material exhibits excellent conductivity and charge storage capability, making it a promising candidate for supercapacitor applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Marieta Belcheva, Georgi Georgiev, Boyko Tsyntsarski, Urszula Szeluga, Lyudmila Kabaivanova
Summary: This study successfully prepared new antibacterial materials by combining activated carbon with metal nanoparticles, taking advantage of the well-known antibacterial activity of metal nanoparticles. The obtained composites exhibited strong antibacterial effects against E. coli and S. aureus, with the antibacterial activity depending on the contact time, bacterial species, nature of the metal, and metal concentration. The findings provide novel materials with antibacterial properties for further development and potential application in hygiene devices.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
V. P. Madhurima, Kusum Kumari, P. K. Jain
Summary: In this study, carbon nanomaterials were synthesized using the arc discharge technique, with a focus on optimizing process parameters to improve yield and quality. The materials were characterized using various analytical tools, and their dye adsorption capabilities were evaluated. The results showed that carbon soot had better adsorption performance compared to carbon nanotubes, indicating the potential of these carbon nanomaterials for environmental remediation applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zhaolong Sun, Bo Cui, Pingping Liang, Qimeng Liu, Nan Gao, Hongdong Li
Summary: This study explores the potential of hafnium (Hf) terminated diamond surfaces in achieving negative electron affinity (NEA). By using swarm-intelligence structural search and first-principles calculations, the researchers found that Hf-terminated diamond surfaces exhibit stable NEA properties and high thermal stability, making them promising candidate materials for electron emission applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
N. Soltani, N. Tavakkoli, E. Eslami, L. S. Mirmohammadi
Summary: In this project, a carbon paste electrode modified with graphene and ZnFe2O4 spinel nanoparticles (Gr/ZnFe2O4/CPE) was used to measure naproxen, and various electrochemical methods were used to investigate its behavior. By optimizing the parameters, good measurement results were obtained.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Xiwei Cui, Yue Qin, Xin Han, Huanyi Chen, Xinxin Ruan, Hui Zhang, Chengcheng Jiao, Rongqi Mao, Jinglin Hao, Sizhuang Zhao, Shuai Hou, Xiaoxuan Pian, Yandong Wang, Kazuhito Nishimura, Lifen Deng, Nan Jiang
Summary: This paper investigates the friction and wear behaviors of two types of polycrystalline diamonds against different materials. The results show that increasing surface roughness leads to an increase in coefficient of friction. The coefficient of friction and wear rate of ceramic Si3N4 balls are generally lower than those of steel GCr15 balls, except for one type of polycrystalline diamond. Transfer films of SiO2 and its hydrate are observed at the friction interface, which contribute to smoother friction and wear. Carbon-based transfer films are also identified, mainly catalyzed by residual cobalt in the polycrystalline diamonds, leading to a phase transformation.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Menglei Sun, Pengjun Li, Mao Wang, Yidan Liang, Xudong Yang, Shujie Pang
Summary: In this study, carbonized polymer dots were synthesized by a one-step hydrothermal method, and silver nanoclusters were synthesized by UV lamp irradiation. They were then self-assembled by electrostatic force to prepare a dual-emission fluorescent nanocomposite that responds to temperature changes. The nanocomposite showed two emission peaks and exhibited excellent linearity between 20°C and 80°C.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Mohamed J. Saadh, Durgesh Singh, Diego Mayorga, Anjan Kumar, Maria Albuja, Ahmad Ismael Saber, Mohammed Ahmed Mustafa, Yasser Elmasry, Noubu Sun
Summary: Based on density functional theory, it is found that the C3N monolayer has good adsorption capability for Hg0 and a short recovery time. This study suggests that the C3N monolayer is a promising adsorbent material for efficient control of gaseous mercury.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Rajendra Kumar Nare, Sivalingam Ramesh, Vijay Kakani, Yuvaraj Haldorai, Chandrasekaran Karthikeyan, Basivi Praveen Kumar, Nadavala Siva Kumar, Mohammad Asif, S. Naresh Kumar, D. Prakash Babu, K. Ramakrishna Reddy, Visweswara Rao Pasupuleti
Summary: This study examines the latest advancements in carbon nanotube (CNT) supercapacitors and related composites, aiming to identify strategies for enhancing their performance. The researchers used ultrasonication aided hydrothermal technique to synthesize a composite made of nitrogen doped carbon nanotubes and porous NiCo2O4 nanomaterial. The composite electrode exhibited excellent cycling stability and a rising specific capacitance, making it appealing for high-performance supercapacitor applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
D. Mary Deena, S. Arockia Anushya, A. Dhanusha, T. C. Sabari Girisun, A. Philominal
Summary: A single-beam Z-Scan experiment was conducted to investigate the nonlinear optical absorption and optical limiting properties of Bi2O3, rGO/Bi2O3, Bi2O3/WO3, and rGO/Bi2O3/WO3 nanostructures. The results showed that the synthesized nanostructures exhibited varying levels of nonlinear absorption, with bismuth-based nanostructures showing the lowest optical limiting threshold and a higher two-photon absorption coefficient. The presence of rGO contributed to the extended conjugation for charge transfer, while the strong UV-Visible absorption of Bi2O3 and WO3 led to a unique nonlinear optical response.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Weibing Guo, Yiren Hu, Tao Wang, Xiaoguang Chen
Summary: This study investigated the microstructure and forming mechanism of graphite/copper joints that were brazed using Ti-containing filler. The results showed that increasing the brazing temperature improved the heat transfer and tensile properties of the composites. Additionally, the composites exhibited high heat flux and faster heating rate compared to copper and aluminum.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Ming Li, ZhiWen Wang, Yu Teng, Hongyu Zhao, Bowei Li, Yang Liu, Shengxue Wang, Zhenze Yang, Liangchao Chen, Hongan Ma, Xiaopeng Jia
Summary: In the experiment, different Ni-content catalysts were used to synthesize diamond crystals, and the properties of the synthesized diamonds were analyzed. The results revealed that the Ni content in the catalyst affects the crystallinity of diamond crystals and the nitrogen crystallinity. The photoluminescence spectroscopy also showed that the diamond synthesized by using Fe-containing catalyst has specific NV-color center structure.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Ling-Feng Mao
Summary: This study proposes an LSTM model to predict the work function of adsorbed metal atoms on graphene, which can quickly screen surface structures with target work function, saving computing and time costs, and improving device performance.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Runzhou Xu, Yinshui Liu, Qian Cheng, Zhenyao Wang, Kai Ma, Peiling Ke, Yipan Deng
Summary: The wear resistance of 17-4PH stainless steel was significantly improved by depositing multi-layered Cr/CrC/DLC coating at wide temperature range. The coating exhibited excellent lubrication and protective properties, and the wear mechanism changed with increasing temperature. The tribochemical reaction during the wear process played a crucial role in the graphitization transformation and friction properties of the coating.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Xilong Guo, Jiaxin Song, Shanling Wang, Li Lei, Omololu Odunmbaku, Ayoub Taallah, Yi He, Aiqun Gu, Filippo S. Boi
Summary: The recent observations of superconductive-ordering in carbon-based systems consisting of rhombohedral stacking-faults, trilayer graphene (ABC-stacks) or dislocation-rich interfaces (pyrolytic graphite) have attracted significant attention. In this study, an unusual nucleation of rhombohedral stacking-faults in low-dimensional systems comprising of multiwall carbon nanotube (CNT) buckypapers was reported. The presence of sulfur doping resulted in a broad-band at the Raman shift from 1800 to 2000 cm(-1), indicating contributions arising from disorder-rich regions with rhombohedral stacking-order (ABC-stacks). These observations were further supported by X-ray diffraction and Rietveld refinements.
DIAMOND AND RELATED MATERIALS
(2024)