Article
Chemistry, Physical
A. Watanabe, T. Nishikawa, H. Kato, M. Fujie, M. Fujiwara, T. Makino, S. Yamasaki, E. D. Herbschleb, N. Mizuochi
Summary: The study focuses on the spin and optical properties of NV centers in phosphorus-doped n-type diamond, demonstrating an extension of spin-coherence time, stabilization of charge state, and improvement of creation yield at a depth of approximately 15 nm. The longest T-2 of about 580 μs for shallow NV centers approaches the limit in bulk diamond, limited by the nuclear spins of natural abundant C-13.
Article
Chemistry, Multidisciplinary
Jeffrey Neethi Neethirajan, Toni Hache, Domenico Paone, Dinesh Pinto, Andrej Denisenko, Rainer Stoehr, Peter Udvarhelyi, Anton Pershin, Adam Gali, Joerg Wrachtrup, Klaus Kern, Aparajita Singha
Summary: Near-surface negatively charged nitrogen vacancy (NV) centers show promise for magnetic imaging and quantum sensing, but their charge-state instabilities decrease fluorescence and NV coherence time, negatively affecting imaging sensitivity. In this study, we demonstrate that in situ adsorption of H2O on the diamond surface can partially recover the performance of shallow NV sensors. Controlled surface treatments are essential for implementing NV-based quantum sensing protocols under cryogenic ultrahigh vacuum conditions, as supported by band-bending calculations.
Article
Physics, Applied
M. Haruyama, H. Kato, M. Ogura, Y. Kato, D. Takeuchi, S. Yamasaki, T. Iwasaki, H. Morishita, M. Fujiwara, N. Mizuochi, T. Makino
Summary: In this study, electrical excitation and detection of electroluminescence (EL) of single negatively charged nitrogen vacancy (NV-) centers were achieved using lateral diamond p(+)-i(n(-))-n(+) diodes. The efficiency of the electrical excitation rate of the NV center was significantly enhanced by introducing this diode structure compared to previous vertical diode structures. The charge state of the NV center could be manipulated by the voltage applied to the diode, leading to increased dominance of NV- in the emission of EL.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Zong-Da Zhang, Si-Yu Yin, Li-Cheng Wang, Ying-De Wang, Yun-Fei Li, Zhen-Nan Tian, Qi-Dai Chen
Summary: An array of single NV centers was prepared using the femtosecond laser direct writing method to address the accuracy and consistency issues in static magnetic field detection. The prepared NV centers have fewer defects and good stress uniformity, with an average spatial positioning error of only 0.2 μm. This array enables high accuracy measurement of magnetic field vector and gradient.
Article
Materials Science, Multidisciplinary
Sergei Malykhin, Yuliya Mindarava, Rinat Ismagilov, Fedor Jelezko, Alexander Obraztsov
Summary: In this study, single-crystal diamond needles with micrometer-scale sharp pyramids were successfully produced using a combination of chemical vapor deposition and thermal oxidation processes. Various color centers, such as nitrogen-vacancy (NV), silicon-vacancy (SiV), and germanium-vacancy (GeV), were formed in these needles during plasma enhanced chemical vapor deposition. The luminescent characteristics of the needles were observed, and the mechanisms of impurities introduction into the crystal lattice during the growth process were proposed and verified.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Optics
D. B. Radishev, M. A. Lobaev, S. A. Bogdanov, A. M. Gorbachev, A. L. Vikharev, M. N. Drozdov
Summary: Co-doping with nitrogen and phosphorus allows NV centers in diamond to predominantly exist in the NV- state and stabilize it under high excitation laser power. Cooling with liquid nitrogen further increases the fraction of the NV- state, which may be beneficial for optimizing the sensitivity of magnetometers.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Physical
Hiroki Takehana, Ichiro Yamane, Takashi Yanase, Taro Nagahama, Toshihiro Shimada
Summary: Different alkali metals (Li, Na, K) react with single crystal diamond particles at different temperatures and have varying effects on the surface morphology. Li reacts the fastest, Na makes the surface rougher, and K has minimal impact. The photoluminescence of the NV-center is only affected after annealing with K, in accordance with band bending behavior.
Article
Materials Science, Multidisciplinary
W. Pfaffle, D. Antonov, J. Wrachtrup, G. Bester
Summary: The computational approach presented in this study, based on density functional theory and screened configuration interaction, is capable of accurately treating highly correlated electron spins localized around semiconductor defects. It is computationally not more demanding than a usual density functional theory calculation, making it suitable for calculating isolated defects or defect complexes. This approach has been successfully applied to the nitrogen vacancy defect in diamond with very good agreement with experimental results.
Article
Chemistry, Multidisciplinary
Nattakarn Suntornwipat, Saman Majdi, Markus Gabrysch, Kiran Kumar Kovi, Viktor Djurberg, Ian Friel, Daniel J. Twitchen, Jan Isberg
Summary: Researchers demonstrate electrostatic control of valley currents in ultrapure single-crystalline diamond, proposing a model to interpret experimental data and paving the way for the development of valleytronic devices.
Article
Materials Science, Multidisciplinary
Lukas Razinkovas, Marek Maciaszek, Friedemann Reinhard, Marcus W. Doherty, Audrius Alkauskas
Summary: The study conducted ab initio calculations on the photoionization characteristics of the NV center in diamond, revealing the mechanism of spin polarization induced electron state transition. These findings are crucial for interpreting and designing experiments on photoionization of NV centers.
Article
Materials Science, Multidisciplinary
Qing Ai, Peng-Bo Li, Wei Qin, Jie-Xing Zhao, C. P. Sun, Franco Nori
Summary: This study demonstrates that nitrogen-vacancy (NV) centers in diamond can produce a unique quantum hyperbolic metamaterial, with a hyperbolic dispersion relation that can be engineered and dynamically tuned by applying a magnetic field. This quantum hyperbolic metamaterial allows for negative refraction and can be used for subwavelength imaging, spontaneous emission enhancement, and other applications in various fields.
Article
Physics, Applied
Hiroshige Deguchi, Tsukasa Hayashi, Hiroya Saito, Yoshiki Nishibayashi, Minori Teramoto, Masanori Fujiwara, Hiroki Morishita, Norikazu Mizuochi, Natsuo Tatsumi
Summary: We have developed a compact and portable measuring instrument using diamond NV centers, which can be powered by a laptop computer's USB 3.0. The portability is achieved by low power consumption of the optics, thanks to the diamond corner cube that enhances the current of the photodiode by 2.1 times compared to planar diamond, and the microwave source that reduced power consumption by 20 dB using a microwave resonator with a λ/4 open stub to magnetically drive the NV center. These results contribute to the social implementation of diamond sensors.
APPLIED PHYSICS EXPRESS
(2023)
Article
Optics
Masanori Fujiwara, Shunsuke Inoue, Shin-ichiro Masuno, Haining Fu, Shigeki Tokita, Masaki Hashida, Norikazu Mizuochi
Summary: Recently, the creation of nitrogen-vacancy (NV) centers using ultrashort laser processing has gained attention for quantum information devices. This study demonstrates the creation of high-density NV centers in a wide region using a single intense femtosecond laser pulse, which is important for quantum sensing applications. The technique allows for the expansion of the region containing NV centers and has the potential to fabricate ultrahigh-sensitivity quantum sensors.
Article
Materials Science, Multidisciplinary
O. R. Rubinas, V. V. Soshenko, S. Bolshedvorskii, A. Zeleneev, A. S. Galkin, S. A. Tarelkin, S. Y. Troschiev, V. V. Vorobyov, V. N. Sorokin, A. A. Sukhanov, V. G. Vins, A. N. Smolyaninov, A. Akimov
Summary: The research shows that by optimizing the electron irradiation dose in postprocessing procedures, the increased dephasing of nitrogen-vacancy color centers in diamond can be efficiently compensated for, thus extending the range of possible useful concentrations of NV centers in diamonds with natural carbon content.
RESULTS IN PHYSICS
(2021)
Article
Optics
Andris Berzins, Janis Smits, Andrejs Petruhins, Roberts Rimsa, Gatis Mozolevskis, Martins Zubkins, Ilja Fescenko
Summary: In this paper, the imaging of stresses in the top layer of diamond with deposited structures of Cr2O3 at temperatures 19°C and 37°C was demonstrated using stress-sensitive optically detected magnetic resonances (ODMR) in NV centers. The stresses in the diamond-film interface were also calculated and correlated to measured ODMR frequency shifts. The results show that NV microscopy can be used to optically detect and quantify the spatial distributions of stresses in diamond-based photonic devices with micrometer precision, and thin films can be used for local application of temperature-controlled stresses.
Article
Chemistry, Multidisciplinary
Yiqi Luo, Zhengdong Liu, Geng Wu, Guanzhong Wang, Tingting Chao, Hai Li, Juqing Liu, Xun Hong
CHINESE CHEMICAL LETTERS
(2019)
Article
Chemistry, Physical
Mengting Xie, Wei Zhu, Kin Man Yu, Zishu Zhu, Guanzhong Wang
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Nanoscience & Nanotechnology
Jun-Feng Wang, Qiang Li, Fei-Fei Yan, He Liu, Guo-Ping Guo, Wei-Ping Zhang, Xiong Zhou, Li-Ping Guo, Zhi-Hai Lin, Jin-Ming Cui, Xiao-Ye Xu, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo
Article
Chemistry, Physical
Jun-Feng Wang, Hao-Lei Zhou, Xiao Xiong, Qiang Li, Ze-Di Cheng, Zheng-Hao Liu, Fei-Fei Yan, Sheng-Ran Lin, Jin-Shi Xu, Guan-Zhong Wang, Lin Wu, Chuan-Feng Li, Guang-Can Guo
Article
Physics, Multidisciplinary
Jun-Feng Wang, Fei-Fei Yan, Qiang Li, Zheng-Hao Liu, He Liu, Guo-Ping Guo, Li-Ping Guo, Xiong Zhou, Jin-Ming Cui, Jian Wang, Zong-Quan Zhou, Xiao-Ye Xu, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo
PHYSICAL REVIEW LETTERS
(2020)
Article
Nanoscience & Nanotechnology
Jun-Feng Wang, Zheng-Hao Liu, Fei-Fei Yan, Qiang Li, Xin-Ge Yang, Liping Guo, Xiong Zhou, Wei Huang, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo
Article
Multidisciplinary Sciences
Jun-Feng Wang, Fei-Fei Yan, Qiang Li, Zheng-Hao Liu, Jin-Ming Cui, Zhao-Di Liu, Adam Gali, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo
Summary: The authors use anti-Stokes excitation to detect Si vacancy spins in SiC, achieving a threefold improvement in signal contrast, and show promising applications in quantum information processing and quantum sensing.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Ruilong Li, Dewei Rao, Jianbin Zhou, Geng Wu, Guanzhong Wang, Zixuan Zhu, Xiao Han, Rongbo Sun, Hai Li, Chao Wang, Wensheng Yan, Xusheng Zheng, Peixin Cui, Yuen Wu, Gongming Wang, Xun Hong
Summary: Amorphization-induced surface electronic states modulation significantly improves the polysulfides adsorption capability of cobaltous oxide, leading to enhanced performance and cycling stability of lithium-sulfur batteries. Compared to crystalline materials, amorphous cobaltous oxide nanosheets demonstrate superior adsorption of polysulfides, making them a promising candidate for cathode additives in Li-S batteries.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Qiang Li, Jun-Feng Wang, Fei-Fei Yan, Ji-Yang Zhou, Han-Feng Wang, He Liu, Li-Ping Guo, Xiong Zhou, Adam Gali, Zheng-Hao Liu, Zu-Qing Wang, Kai Sun, Guo-Ping Guo, Jian-Shun Tang, Hao Li, Li-Xing You, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo
Summary: This study demonstrates the coherent manipulation of single divacancy spins in 4H-SiC with a high readout contrast and photon count rate, comparable to the nitrogen-vacancy centers in diamond. The coupling between a single defect spin and a nearby nuclear spin is also observed.
NATIONAL SCIENCE REVIEW
(2022)
Article
Materials Science, Multidisciplinary
Yanpu Chen, Zishu Zhu, Haolei Zhou, Pingping Ma, Liren Lou, Wei Zhu, Guanzhong Wang
Summary: High c-axis orientation and three dimensional textured AlN films were deposited on sapphire by reactive ion assisted sputtering. Rapid thermal annealing (RTA) at 700-900 degrees C for 5 min released the film stress and changed the atomic arrangement near the substrate. In-plane tensile stress of deposited AlN films was released by RTA, as shown by the shift in the Raman spectra peaks. Multiple-cycle rapid thermal annealing was proposed to prevent peeling caused by long heating time.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Qin-Yue Luo, Shuang Zhao, Qi-Cheng Hu, Wei-Ke Quan, Zi-Qi Zhu, Jia-Jun Li, Jun-Feng Wang
Summary: In this study, a high-sensitivity silicon carbide divacancy-based thermometer was developed using the thermal Carr-Purcell-Meiboom-Gill (TCPMG) method. The thermometer showed a high temperature-sensing sensitivity and has potential applications in the semiconductor industry, biology, and materials sciences.
Article
Materials Science, Multidisciplinary
Jun-Feng Wang, Jin-Ming Cui, Fei-Fei Yan, Qiang Li, Ze-Di Cheng, Zheng-Hao Liu, Zhi-Hai Lin, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo
Article
Chemistry, Multidisciplinary
Qiang Li, Jun-Feng Wang, Fei-Fei Yan, Ze-Di Cheng, Zheng-Hao Liu, Kun Zhou, Li-Ping Guo, Xiong Zhou, Wei-Ping Zhang, Xiu-Xia Wang, Wei Huang, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo
Article
Chemistry, Multidisciplinary
Qiuyun Yang, Zihan Zhang, Wei Zhu, Guanzhong Wang
Article
Chemistry, Multidisciplinary
Laetitia Bardet, Herve Roussel, Stefano Saroglia, Masoud Akbari, David Munoz-Rojas, Carmen Jimenez, Aurore Denneulin, Daniel Bellet
Summary: The thermal instability of silver nanowires leads to increased electrical resistance in AgNW networks. Understanding the relationship between structural and electrical properties of AgNW networks is crucial for their integration as transparent electrodes in flexible optoelectronics. In situ X-ray diffraction measurements were used to study the crystallographic evolution of Ag-specific Bragg peaks during thermal ramping, revealing differences in thermal and structural transitions between bare and SnO2-coated AgNW networks.
Article
Chemistry, Multidisciplinary
Nathalia Cancino-Fuentes, Arnau Manasanch, Joana Covelo, Alex Suarez-Perez, Enrique Fernandez, Stratis Matsoukis, Christoph Guger, Xavi Illa, Anton Guimera-Brunet, Maria V. Sanchez-Vives
Summary: This study provides a comprehensive characterization of graphene-based solution-gated field-effect transistors (gSGFETs) for brain recordings, highlighting their potential clinical applications.
Article
Chemistry, Multidisciplinary
Sikandar Aftab, Hailiang Liu, Dhanasekaran Vikraman, Sajjad Hussain, Jungwon Kang, Abdullah A. Al-Kahtani
Summary: This study examines the effects of hybrid nanoparticles made of NiO@rGO and NiO@CNT on the active layers of polymer solar cells and X-ray photodetectors. The findings show that these hybrid nanoparticles can enhance the charge carrier capacities and exciton dissociation properties of the active layers. Among the tested configurations, the NiO@CNT device demonstrates superior performance in converting sunlight into electricity, and achieves the best sensitivity for X-ray detection.
Article
Chemistry, Multidisciplinary
Hyo Jung Shin, Seung Gyu Choi, Fengrui Qu, Min-Hee Yi, Choong-Hyun Lee, Sang Ryong Kim, Hyeong-Geug Kim, Jaewon Beom, Yoonyoung Yi, Do Kyung Kim, Eun-Hye Joe, Hee-Jung Song, Yonghyun Kim, Dong Woon Kim
Summary: This study investigates the role of SOX9 in reactive astrocytes following ischemic brain damage using a PLGA nanoparticle plasmid delivery system. The results demonstrate that PLGA nanoparticles can reduce ischemia-induced neurological deficits and infarct volume, providing a potential opportunity for stroke treatment.
Article
Chemistry, Multidisciplinary
Anurag Chaudhury, Koushik Debnath, Nikhil R. Jana, Jaydeep K. Basu
Summary: The study investigates the interaction between nanoparticles and cell membranes, and identifies key parameters, including charge, crowding, and membrane fluidity, that determine the adsorbed concentration and unbinding transition of nanoparticles.
Article
Chemistry, Multidisciplinary
Sina Sadeghi, Fazel Bateni, Taekhoon Kim, Dae Yong Son, Jeffrey A. Bennett, Negin Orouji, Venkat S. Punati, Christine Stark, Teagan D. Cerra, Rami Awad, Fernando Delgado-Licona, Jinge Xu, Nikolai Mukhin, Hannah Dickerson, Kristofer G. Reyes, Milad Abolhasani
Summary: In this study, an autonomous approach for the development of lead-free metal halide perovskite nanocrystals is presented, which integrates a modular microfluidic platform with machine learning-assisted synthesis modeling. This approach enables rapid and optimized synthesis of copper-based lead-free nanocrystals.
Article
Chemistry, Multidisciplinary
Zahir Abbas, Nissar Hussain, Surender Kumar, Shaikh M. Mobin
Summary: The rational construction of free-standing and flexible electrodes for electrochemical energy storage devices is an emerging research focus. In this study, a redox-active metal-organic framework (MOF) was prepared on carbon nanofibers using an in situ approach, resulting in a flexible electrode with high redox-active behavior and unique properties such as high flexibility and lightweight. The prepared electrode showed excellent cyclic retention and rate capability in supercapacitor applications. Additionally, it could be used as a freestanding electrode in flexible devices at different bending angles.
Article
Chemistry, Multidisciplinary
Lishan Zhang, Xiaoting Zhang, Hui Ran, Ze Chen, Yicheng Ye, Jiamiao Jiang, Ziwei Hu, Miral Azechi, Fei Peng, Hao Tian, Zhili Xu, Yingfeng Tu
Summary: Photodynamic therapy (PDT) is a promising local treatment modality in cancer therapy, but its therapeutic efficacy is restricted by ineffective delivery of photosensitizers and tumor hypoxia. In this study, a phototactic Chlorella-based near-infrared (NIR) driven green affording-oxygen microrobot system was developed for enhanced PDT. The system exhibited desirable phototaxis and continuous oxygen generation, leading to the inhibition of tumor growth in mice. This study demonstrates the potential of using a light-driven green affording-oxygen microrobot to enhance photodynamic therapy.
Article
Chemistry, Multidisciplinary
Yujin Li, Jing Xu, Xinqi Luo, Futing Wang, Zhong Dong, Ke-Jing Huang, Chengjie Hu, Mengyi Hou, Ren Cai
Summary: In this study, hollow heterostructured materials were constructed using an innovative template-engaged method as cathodes for zinc-ion batteries. The materials exhibited fast Zn2+ transport channels, improved electrical conductivity, and controlled volume expansion during cycling. The designed structure allowed for an admirable reversible capacity and high coulombic efficiency.
Article
Chemistry, Multidisciplinary
Paritosh Mahato, Shashi Shekhar, Rahul Yadav, Saptarshi Mukherjee
Summary: This study comprehensively elucidates the role of the core and electrostatic surface of metal nanoclusters in catalytic reduction reactions. The electrostatic surface dramatically modulates the reactivity of metal nanoclusters.
Article
Chemistry, Multidisciplinary
Pei Liu, Mengdi Liang, Zhengwei Liu, Haiyu Long, Han Cheng, Jiahe Su, Zhongbiao Tan, Xuewen He, Min Sun, Xiangqian Li, Shuai He
Summary: This study demonstrates a simple and environmentally-friendly method for the synthesis of zinc oxide nanozymes (ZnO NZs) using wasted hop extract (WHE). The WHE-ZnO NZs exhibit exceptional peroxidase-like activity and serve as effective catalysts for the oxidation of 3,3,5,5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2). In addition, a straightforward colorimetric technique for detecting both H2O2 and glucose was developed using the WHE-ZnO NZs as peroxidase-like catalysts.
Article
Chemistry, Multidisciplinary
Hyunkyu Oh, Young Jun Lee, Eun Ji Kim, Jinseok Park, Hee-Eun Kim, Hyunsoo Lee, Hyunjoo Lee, Bumjoon J. Kim
Summary: Mesoporous carbon particles have unique structural properties that make them suitable as support materials for catalytic applications. This study investigates the impact of channel nanostructures on the catalytic activity of porous carbon particles (PCPs) by fabricating PCPs with controlled channel exposure on the carbon surface. The results show that PCPs with highly open channel nanostructures exhibit significantly higher catalytic activity compared to those with closed channel nanostructures.
Article
Chemistry, Multidisciplinary
Yunjie Lu, Zhaohui Li, Zewei Li, Shihao Zhou, Ning Zhang, Jianming Zhang, Lu Zong
Summary: A tough, long-lasting adhesive and highly conductive nanocomposite hydrogel (PACPH) was fabricated via the synergy of interfacial entanglement and adhesion group densification. PACPH possesses excellent mechanical properties, interfacial adhesion strength, and conductivity, making it a promising material for long-term monitoring of human activities and electrocardiogram signals.
Article
Chemistry, Multidisciplinary
Zichao Wei, Audrey Vandergriff, Chung-Hao Liu, Maham Liaqat, Mu-Ping Nieh, Yu Lei, Jie He
Summary: We have developed a simple method to prepare polymer-grafted plasmonic metal nanoparticles with pH-responsive surface-enhanced Raman scattering. By using pH-responsive polymers as ligands, the aggregation of nanoparticles can be controlled, leading to enhanced SERS. The pH-responsive polymer-grafted nanoparticles show high reproducibility and sensitivity in solution, providing a novel approach for SERS without the need for sample pre-concentration.
Article
Chemistry, Multidisciplinary
Melis Ozge Alas Colak, Ahmet Gungor, Merve Buldu Akturk, Emre Erdem, Rukan Genc
Summary: This research investigates the effect of functionalizing carbon dots with hydroxyl polymers on their performance as electrode materials in a supercapacitor. The results show that the functionalized carbon dots exhibit excellent electrochemical performance and improved stability.