Article
Chemistry, Physical
Lachlan M. Oberg, Marietta Batzer, Alastair Stacey, Marcus W. Doherty
Summary: This study investigates the catalytic effect of surface-embedded nitrogen on diamond growth, revealing that nitrogen can promote nucleation of new diamond layers. A new model and mechanism for nitrogen overgrowth are proposed, shedding light on the role of nitrogen in enhancing diamond growth.
Article
Materials Science, Coatings & Films
D. S. Misra
Summary: Single crystal diamonds grown by chemical vapor deposition (CVD) are gaining acceptance in the market for gem purposes and various applications. The nitrogen concentration in CVD diamond crystals is a major concern for certain applications, but it can be tolerated for gem purposes. This study investigates the correlation of nitrogen in different forms of vacancy centers in CVD diamond crystals with different fluorescence properties.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Chemistry, Physical
Priyadharshini Balasubramanian, Christian Osterkamp, Ovidiu Brinza, Maxime Rollo, Isabelle Robert-Philip, Philippe Goldner, Vincent Jacques, Fedor Jelezko, Jocelyn Achard, Alexandre Tallaire
Summary: In this study, properties of negatively charged nitrogen-vacancy (NV-) centers created during single crystal diamond growth on [113]-oriented substrates with N2O as a dopant gas using chemical vapor deposition (CVD) were investigated. The results showed that at moderate growth temperatures, dense NV- ensembles with high NV-/ N0s ratios and high creation yield can be achieved. The material obtained here combines a high NV- density, long coherence times, and partial preferential orientation, making it a promising candidate for diamond-based quantum sensors.
Article
Chemistry, Multidisciplinary
Vadim Sedov, Artem Martyanov, Alexey Popovich, Sergey Savin, Dmitry Sovyk, Ivan Tiazhelov, Dmitrii Pasternak, Soumen Mandal, Victor Ralchenko
Summary: We present a novel method for fabricating porous diamond by synthesizing diamond-germanium composite films and selectively etching the germanium component. The films were grown by microwave plasma assisted chemical vapor deposition on silicon and diamond substrates. The structure and phase composition of the films were analyzed before and after etching using microscopy and spectroscopy techniques. The porous diamond films exhibited bright emission of GeV color centers, indicating successful doping of diamond with germanium. Potential applications of these films include thermal management, superhydrophobic surfaces, chromatography, supercapacitors, etc.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Physical
Tetsuya Tatsuishi, Kyotaro Kanehisa, Taisuke Kageura, Takahiro Sonoda, Yuki Hata, Kazuto Kawakatsu, Takashi Tanii, Shinobu Onoda, Alastair Stacey, Shozo Kono, Hiroshi Kawarada
Summary: This paper presents a new methodology for fabrication of 2D aligned NV ensembles by using pure diamond growth and high nitrogen coverage on (111) surface. The resulting 2D NV ensembles have high alignment ratio and long coherence time. Introducing thermal annealing of the nitrogen termination improves alignment rate.
Article
Materials Science, Multidisciplinary
Michael N. R. Ashfold, Yuri A. Mankelevich
Summary: This study applies a two-dimensional self-consistent model to systematically investigate the effects of gas pressure and absorbed power on diamond deposition processes in microwave plasma activated chemical vapor deposition reactors. The study reveals the radial distributions of CH3 radical and H atom concentrations as well as the changes in diamond growth rates under different conditions, providing valuable insights for optimizing deposition regimes.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Quantum Science & Technology
Takeyuki Tsuji, Takeharu Sekiguchi, Takayuki Iwasaki, Mutsuko Hatano
Summary: Extending the spin-dephasing time of NV centers in CVD diamonds can enhance the magnetic sensitivity. The study shows that adjusting the misorientation angle can mitigate stress distribution and increase the spin-dephasing time of NV centers.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Chemistry, Physical
Lidia Mosinska, Robert Szczesny, Marek Trzcinski, Mieczyslaw Karol Naparty
Summary: The change in methanol content during the HF CVD process can tune the properties of diamond layers.
Article
Chemistry, Physical
William G. S. Leigh, Evan L. H. Thomas, Jerome A. Cuenca, Soumen Mandal, Oliver A. Williams
Summary: This study developed an optical model using spectroscopic ellipsometry (SE) to monitor and optimize the critical early stages of polycrystalline diamond growth in real-time.
Article
Materials Science, Multidisciplinary
Arne Goetze, Nico Striegler, Alastair Marshall, Philipp Neumann, Christian Giese, Patricia Quellmalz, Peter Knittel
Summary: The process of creating NV centers on single-crystalline diamond microstructures by chemical vapor deposition (CVD) allows for control of the NV center positions, resulting in exclusive generation of NV centers on the {111} pyramid side faces and preferential alignment in a single {111} direction with a T 2 time of 55 µs.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2022)
Article
Multidisciplinary Sciences
Meiyan Jiang, Chengke Chen, Ping Wang, Difeng Guo, Sijia Han, Xiao Li, Shaohua Lu, Xiaojun Hu
Summary: Researchers have discovered that diamonds are formed from graphite through phase transformation, rather than etching by hydrogen and carbon species piling up, providing a new approach to prepare large-area diamonds based on large-sized graphite under normal pressure. This finding also contributes to the understanding of the growth mechanism of materials with sp(2) and sp(3) electronic configurations.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Materials Science, Multidisciplinary
Fan Zhou, Naichao Chen, Fasong Ju
Summary: By increasing the chemical reaction rate and using graphene oxide particles as adsorbents, it is possible to deposit diamond coatings with large grain size and high thickness on silicon nitride substrates. The dispersed particles can enhance the adhesive strength and crack resistance of the diamond coating, making it a potential technique for achieving desired coatings through accelerated CVD chemical reactions.
Article
Chemistry, Physical
Xiucai Sun, Xiaoting Liu, Zhongti Sun, Xintong Zhang, Yuzhu Wu, Yeshu Zhu, Yuqing Song, Kaicheng Jia, Jincan Zhang, Luzhao Sun, Wan-Jian Yin, Zhongfan Liu
Summary: This study reveals the importance of vapor catalysis in superclean graphene growth through density functional theory calculations, an ideal gas model, and a designed experiment. The study finds that the vapor mainly consists of Cui clusters, which have a significant impact on graphene growth. DFT calculations show that Cu clusters exhibit strong capabilities for adsorption, dehydrogenation, and decomposition, providing a sufficient supply of active carbon atoms for rapid graphene growth. Experimental validation confirms that increasing the amount of Cu vapor improves the growth rate and surface cleanliness of graphene.
Article
Materials Science, Multidisciplinary
Jerome A. Cuenca, Soumen Mandal, Evan L. H. Thomas, Oliver A. Williams
Summary: This study presents a microwave plasma model to investigate the spatial heteroepitaxial growth of polycrystalline diamond on Si in a chemical vapor deposition reactor. The model demonstrates radial variation in growth rate over small samples with different sample holders. Experimental validations using Raman spectroscopy and scanning electron microscopy are conducted. The results reveal the importance of sample holder design for achieving uniform diamond films.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Chemistry, Physical
Eric Navarrete, Frank Guell, Paulina R. Martinez-Alanis, Eduard Llobet
Summary: Different thicknesses of Au films were used in the growth of ZnO nanowires, with the 6 nm thick layers showing the most stable and repeatable gas sensing properties. Despite ZnO nanowires grown using the thickest Au layers reaching the highest responses under dry conditions, those grown using the thinnest Au film were more resilient at detecting NO2 in the presence of ambient moisture. The gas sensing results were discussed in light of defects and Au impurities in the ZnO nanowires, as revealed by characterization techniques such as X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and photoluminescence spectroscopy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
B. -C. Gallheber, M. Fischer, M. Mayr, J. Straub, M. Schreck
JOURNAL OF APPLIED PHYSICS
(2018)
Article
Chemistry, Multidisciplinary
Huanyao Cun, Adrian Hemmi, Elisa Miniussi, Carlo Bernard, Benjamin Probst, Ke Liu, Duncan T. L. Alexander, Armin Kleibert, Gerson Mette, Michael Weinl, Matthias Schreck, Jurg Osterwalder, Aleksandra Radenovic, Thomas Greber
Article
Instruments & Instrumentation
Thomas Roth, Wolfgang Freund, Ulrike Boesenberg, Gabriella Carini, Sanghoon Song, Gwenaelle Lefeuvre, Alexander Goikhman, Martin Fischer, Matthias Schreck, Jan Gruenert, Anders Madsen
JOURNAL OF SYNCHROTRON RADIATION
(2018)
Article
Nanoscience & Nanotechnology
Richard Nelz, Johannes Goerlitz, Dennis Herrmann, Abdallah Slablab, Michel Challier, Mariusz Radtke, Martin Fischer, Stefan Gsell, Matthias Schreck, Christoph Becher, Elke Neu
Article
Materials Science, Multidisciplinary
E. Berdermann, K. Afanaciev, M. Ciobanu, M. Fischer, S. Gsell, M. Kis, S. Lagomarsino, W. Lohmann, M. Mayr, M. Pomorski, M. S. Rahman, C. J. Schmidt, S. Sciortino, M. Schreck, C. Stehl, M. Traeger
DIAMOND AND RELATED MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Matthias Schreck, Michael Mayr, Michael Weinl, Martin Fischer, Stefan Gsell
DIAMOND AND RELATED MATERIALS
(2020)
Article
Optics
Kay Waltar, Johannes Haase, Rui Pan, Torsten Golz, Pavel Kliuiev, Michael Weinl, Matthias Schreck, Sasa Bajt, Nikola Stojanovic, Jeroen A. van Bokhoven, Matthias Hengsberger, Jurg Osterwalder, Luca Castiglioni
Article
Physics, Applied
M. Schreck, P. Scajev, M. Traeger, M. Mayr, T. Gruenwald, M. Fischer, S. Gsell
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Chemistry, Physical
Zbynek Novotny, Benjamin Tobler, Luca Artiglia, Martin Fischer, Matthias Schreck, Joerg Raabe, Juerg Osterwalder
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2020)
Article
Physics, Applied
Raphael Mueller, Martin Mangold, Florian Huber, Matthias Schreck, Ulrich Herr, Klaus Thonke
Summary: This study reports three new sharp emission lines in zinc oxide related to iron-lithium complexes. After annealing at 800 degrees C in an oxygen/argon atmosphere, the lithium-containing sample exhibited intense and sharp lines, in contrast to the lithium-free sample. Time-resolved measurements showed a reduced lifetime for the new emission lines, indicating a stronger interaction between Fe 3d states and surrounding p-orbitals.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Dimitrios Topaltzikis, Marek Wielunski, Andreas L. Hoerner, Matthias Kuss, Alexander Reiner, Theodor Gruenwald, Matthias Schreck, Achim Wixforth, Werner Ruehm
Summary: The study presents a proof of concept for an x-ray detector using a hybrid device consisting of a synthetic single crystal diamond and a piezoelectric lithium niobate surface acoustic wave (SAW) delay line. The change in SAW attenuation is utilized to monitor x-ray beam intensity, showing a monotonic variation with dose rate in the studied range. The SAW detection principle provides the unique possibility for wireless remote powering and sensing, although further improvement is needed for response time.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
Theodor Gruenwald, Matthias Schreck
Summary: This study theoretically analyzed the irradiation-induced conductivity of diamond crystals containing nitrogen and boron as impurities, deriving analytical solutions for the gain G as a function of impurity concentrations, crystal thickness, and excitation density. Results showed that the gain G systematically varies with the compensation ratio R, with the maximum gain observed at R approximately 10^3.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Quantum Science & Technology
Jonas Foglszinger, Andrej Denisenko, Thomas Kornher, Matthias Schreck, Wolfgang Knolle, Boris Yavkin, Roman Kolesov, Joerg Wrachtrup
Summary: This study demonstrates that the TR12 radiative defect in diamond exhibits a strong optically detected magnetic resonance (ODMR) signal and has stable detection capability even for strong off-axis magnetic fields. This makes TR12 centers suitable for vector magnetometry at high magnetic fields.
NPJ QUANTUM INFORMATION
(2022)
Article
Chemistry, Physical
Zhichao Liu, Simona Baluchova, Andre F. Sartori, Ziyu Li, Yaiza Gonzalez-Garcia, Matthias Schreck, Josephus G. Buijnsters
Summary: In this study, three heteroepitaxial single-crystal boron-doped diamond (SC-BDD) electrodes were fabricated and characterized. The SC-BDD electrodes exhibited large area and high dopant concentration, with different surface morphologies due to growth on different substrates. The electrodes showed high conductivity and metal-like behavior, and demonstrated excellent electrochemical response and resistance to fouling.
Article
Chemistry, Multidisciplinary
Kamatchi Jothiramalingam Sankaran, Chien-Jui Yeh, Srinivasu Kunuku, Joseph Palathinkal Thomas, Paulius Pobedinskas, Sien Drijkoningen, Balakrishnan Sundaravel, Keh-Chyang Leou, Kam Tong Leung, Marlies K. Van Bael, Matthias Schreck, I-Nan Lin, Ken Haenen
