Article
Nanoscience & Nanotechnology
Kenjiro Hayashi, Naoki Fushimi, Masako Kataoka, Daiyu Kondo, Shintaro Sato
Summary: This study presents a new approach to reveal the grain structure of turbostratic multilayer graphene (MLG) using transmission electron microscopy (TEM) observation. Mechanical delamination is demonstrated to peel off the topmost graphene layers of the MLG, and patterning of the MLG prior to delamination is found to be effective for obtaining graphene films with desired shape and arrangement.
Review
Chemistry, Multidisciplinary
Wenqian Yao, Hongtao Liu, Jianzhe Sun, Bin Wu, Yunqi Liu
Summary: This review provides a comprehensive overview of current challenges and opportunities for chemical vapor deposition (CVD) growth, characterization, and electrical properties of graphene depending on the layer number and twist angles. Various state-of-the-art innovations using the CVD method are presented, and the underlying growth mechanisms and characterization methods are discussed.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Ceramics
Rong Tu, Zhen Liu, Qingfang Xu, Song Zhang, Qizhong Li, Xian Zhang, Marina L. Kosinova, Takashi Goto
Summary: Silicon nitride films were fabricated using halide laser chemical vapor deposition (LCVD) for surface protection of electronic devices. The study investigated the effects of deposition parameters on the crystallinity, microstructure, deposition rate, Vickers microhardness, nano-hardness, and electrical resistivity. The highest deposition rate was achieved at a temperature of 1573 K and pressure of 10 kPa. The hardness of the films increased with temperature and the electrical resistivity decreased.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Yuting Hou, Richard C. Stehle, Fangzhu Qing, Xuesong Li
Summary: Characterization using a combination of scanning electron microscopy, atomic force microscopy, and Raman spectroscopy is used to co-localize and characterize aged and transferred graphene. The investigation reveals the correlation between morphology and structure, as well as unique features resulting from aging and transfer.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
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
Chemistry, Physical
Kaicheng Jia, Ziteng Ma, Wendong Wang, Yongliang Wen, Huanxin Li, Yeshu Zhu, Jiawei Yang, Yuqing Song, Jiaxin Shao, Xiaoting Liu, Qi Lu, Yixuan Zhao, Jianbo Yin, Luzhao Sun, Hailin Peng, Jincan Zhang, Li Lin, Zhongfan Liu
Summary: Chemical vapor deposition is a promising method for controlled growth of high-quality graphene films. Cold-wall CVD system has the potential for industrial-scale production, but the quality of graphene is still limited. This study presents an efficient method for batch synthesis of high-quality graphene films with millimeter-sized domains.
Article
Materials Science, Coatings & Films
Abdulkadeer Mohammedi Jetpurwala, Malay Dikshit
Summary: The study established diamond coating on tungsten carbide burs using Chemical Vapor Deposition (CVD) and assessed its adherence at high rotational speeds, showing that Nano crystalline diamond (NCD) coating demonstrated better adherence compared to Microcrystalline diamond (MCD). The maximum loss of diamond film was 33 μm for NCD and 91 μm for MCD after nine repeated cavity preparations, demonstrating NCD's superior wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Chamseddine Bouhafs, Sergio Pezzini, Fabian R. Geisenhof, Neeraj Mishra, Vaidotas Miseikis, Yuran Niu, Claudia Struzzi, R. Thomas Weitz, Alexei A. Zakharov, Stiven Forti, Camilla Coletti
Summary: The study successfully synthesized rhombohedral graphene with a thickness of up to 9 layers, with alternating crystal domains identified in Raman spectroscopy. Microscopic and spectroscopic analyses suggest that rhombohedral-stacking formation is correlated to underlying copper step-bunching.
Article
Materials Science, Multidisciplinary
Jie Wang, Tengfei Fan, Jianchen Lu, Xiaoming Cai, Lei Gao, Jinming Cai
Summary: Graphene with different morphologies, such as dendrites, rectangle, and hexagon, has been grown on polycrystalline copper substrates using low-pressure chemical vapor deposition. The evolution of fractal graphene grown on the copper substrate has also been observed. The study investigates the changes in graphene morphology as a function of the methane to hydrogen volume ratio. Additionally, phenomena of stitching snow-like graphene and stacking graphene with different angles have been observed.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zhe Yuan, Guangwei He, Samuel Faucher, Matthias Kuehne, Sylvia Xin Li, Daniel Blankschtein, Michael S. Strano
Summary: By systematically controlling the density of intrinsic pores in graphene, single-layer graphene membranes with the highest gas separation performances to date have been achieved. Additionally, nanoscale molecular fouling on the graphene surface affects both selectivity and temperature-dependent permeance.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Kazuki Uchiyama, Takashi Yamamoto, Yasuaki Einaga
Summary: Silicon carbide (SiC) has excellent properties but lacks sufficient electrical conductivity for electrochemical applications, leading to the exploration of boron-doped SiC (SiC:B). The electrochemical properties of SiC:B were evaluated and found to have reactivity and sensitivity comparable to that of glassy carbon electrodes.
Article
Chemistry, Multidisciplinary
Artem K. Grebenko, Dmitry Krasnikov, Anton Bubis, Vasily S. Stolyarov, Denis V. Vyalikh, Anna A. Makarova, Alexander Fedorov, Aisuluu Aitkulova, Alena A. Alekseeva, Evgeniia Gilshtein, Zakhar Bedran, Alexander N. Shmakov, Liudmila Alyabyeva, Rais N. Mozhchil, Andrey M. Ionov, Boris P. Gorshunov, Kari Laasonen, Vitaly Podzorov, Albert G. Nasibulin
Summary: This article introduces a new method for the large-scale production of high-purity graphene using the Boudouard reaction and CO-driven catalyst engineering. This approach not only suppresses the growth of the second layer of graphene, but also provides a simple and reliable technique for surface cleaning.
Article
Materials Science, Multidisciplinary
Minghao Liang, Ling-Xuan Qian, Yuting Hou, Jun Li, Changqing Shen, Fangzhu Qing, Xuesong Li
Summary: Both batch-to-batch (B2B) and roll-to-roll (R2R) processes can be used for mass production of graphene films. R2R process is more industrially preferred due to automation and compatibility with transfer process, but a deeper understanding of growth kinetics is needed.
SCIENCE CHINA-MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Jinhong Du, Bo Tong, Shuangdeng Yuan, Nian Dai, Rui Liu, Dingdong Zhang, Hui-Ming Cheng, Wencai Ren
Summary: This article reviews the recent advances and significant development of CVD-grown graphene towards flexible optoelectronics. The challenges of improving optoelectronic properties, tuning work functions, and controlling interfaces are discussed, and the importance of fabricating large-area devices on flexible substrates is emphasized.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Sara Fiori, Daniele Perilli, Mirco Panighel, Cinzia Cepek, Aldo Ugolotti, Alessandro Sala, Hongsheng Liu, Giovanni Comelli, Cristiana Di Valentin, Cristina Africh
Summary: High-quality nitrogen-doped graphene on nickel was prepared by utilizing both the catalytic properties of nickel and the solubility of nitrogen atoms. The experimental results demonstrated the growth of a flat, wide, continuous nitrogen-doped graphene layer, showing potential for various applications.
Article
Materials Science, Multidisciplinary
A. Rehman, S. Smirnov, A. Krajewska, D. B. But, M. Liszewska, B. Bartosewicz, K. Pavlov, G. Cywinski, D. Lioubtchenko, W. Knap, S. Rumyantsev
Summary: The study revealed that the 1/f noise in carbon nanotube devices is strongly influenced by the quality of the nanotubes, with noise spectroscopy being an effective tool to characterize their structural quality. Additionally, UV light exposure increased device resistance and noise amplitude, with the effects persisting for tens of minutes even after the UV light was turned off. The noise spectra and resistance exhibited a completely different trend with temperature compared to UV illumination, suggesting the presence of at least two important resistance components that contribute to the total resistance of the device.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Physics, Applied
A. Rehman, A. Krajewska, B. Stonio, K. Pavlov, G. Cywinski, D. Lioubtchenko, W. Knap, S. Rumyantsev, J. M. Smulko
Summary: The study found that as-fabricated carbon nanotube network transistors exhibit a superposition of generation-recombination and 1/f noise spectra, and exposure to the atmosphere reduces both resistance and GR noise. These noise properties can be utilized for selective gas sensing based on noise measurements.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Jakub Kierdaszuk, Ewelina Rozbiega, Karolina Pietak, Sebastian Zlotnik, Aleksandra Przewloka, Aleksandra Krajewska, Wawrzyniec Kaszub, Maria Kaminska, Andrzej Wysmolek, Johannes Binder, Aneta Drabinska
Summary: The study demonstrates effective gating of graphene at low bias using four-layered graphene/gallium nitride (GaN) Schottky diodes and undoped GaN spacer, suggesting their potential for applications. The observed Raman G band position shift and splitting indicate turbostratic layer stacking and high potential gradient near the Schottky junction. Analysis based on electroreflectance measurements and a modified Richardson equation confirms graphene behavior as a capacitor at reverse bias on n-GaN separated by an undoped GaN spacer.
APPLIED SURFACE SCIENCE
(2021)
Article
Physics, Applied
Karolina Pietak, Jakub Jagiello, Artur Dobrowolski, Rafal Budzich, Andrzej Wysmolek, Tymoteusz Ciuk
Summary: In this report, a method for enhancing the Raman active modes of hydrogen-intercalated graphene and the underlying SiC substrate is demonstrated using amorphous Al2O3 passivation. The study finds that specific Al2O3 thicknesses increase the spectra intensities of both graphene and SiC. The effectiveness of the method is also shown in determining dielectric thickness and high-resolution topographic imaging.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Jakub Kierdaszuk, Pawel Dabrowski, Maciej Rogala, Pawel Krukowski, Aleksandra Przewloka, Aleksandra Krajewska, Wawrzyniec Kaszub, Marta Sobanska, Zbigniew R. Zytkiewicz, Vitaly Z. Zubialevich, Pawel J. Kowalczyk, Andrzej Wysmolek, Johannes Binder, Aneta Drabinska
Summary: Gallium nitride nanowire and nanorod substrates can control the strain distribution in graphene films, inducing pseudomagnetic fields. Adjustment of distances between supporting regions allows for the control of graphene morphology, holding promise for fundamental research and developing pseudo-magnetic field-based devices.
Article
Chemistry, Analytical
Katarzyna Drozdowska, Adil Rehman, Aleksandra Krajewska, Dmitri Lioubtchenko, Krystian Pavlov, Sergey Rumyantsev, Janusz Smulko, Grzegorz Cywinski
Summary: The sensing characteristics of carbon nanotube networks in NO2 gas environment are significantly enhanced under UV irradiation, allowing detection of lower concentrations of NO2. At low concentrations, the 1/f noise component of the carbon nanotube network is dominantly present, and the reaction speed for gas absorption-desorption is faster.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Materials Science, Multidisciplinary
Jakub Sitek, Iwona Pasternak, Karolina Czerniak-Losiewicz, Michal Swiniarski, Pawel P. Michalowski, Clifford McAleese, Xiaochen Wang, Ben R. Conran, Konrad Wilczynski, Michal Macha, Aleksandra Radenovic, Mariusz Zdrojek, Wlodek Strupinski
Summary: Van der Waals heterostructures provide a unique platform for studying the fundamental physics and practical applications of two-dimensional materials. In this study, we successfully prepared a monolayered MoS2/WS2/graphene vertical heterostructure using chemical vapor deposition without the need for transfer. By employing various characterization techniques, we confirmed the vertical stacking of the three different materials. Our findings highlight the importance of the chemical potential of crystal formation and the substrate-layer adhesion energy in the synthesis of 2D materials.
Article
Chemistry, Physical
Semir El-Ahmar, Maciej J. Szary, Tymoteusz Ciuk, Rafal Prokopowicz, Artur Dobrowolski, Jakub Jagiello, Maciej Ziemba
Summary: This paper presents the first experimental study on the effect of neutron radiation on quasi-free-standing (QFS) graphene. The results show that the graphene sheet is moderately affected by neutron radiation, with a low defect density. The electrical properties of the graphene system are maintained, making it a promising platform for magnetic diagnostics in magnetic-confinement fusion reactors. However, the scope of its use requires further investigation.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
T. Ciuk, L. Ciura, P. P. Michalowski, J. Jagiello, A. Dobrowolski, K. Pietak, D. Kalita, M. Wzorek, R. Budzich, D. Czolak, A. Kolek
Summary: This report introduces a novel method based on low-frequency noise analysis for evaluating the quality and pattern of inhomogeneity in intentionally-aged Hall effect sensors. By comparing the measured noise with the calculated noise for a homogeneous sensor, we speculate about the presence of unintentional contamination in the active regions of the sensors. Through in-depth structural characterization, we discover that the graphene's characteristics and interface make it susceptible to uncontrolled contamination, leading to blistering of the material.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Chemistry, Analytical
Semir El-Ahmar, Marta Przychodnia, Jakub Jankowski, Rafal Prokopowicz, Maciej Ziemba, Maciej J. Szary, Wiktoria Reddig, Jakub Jagiello, Artur Dobrowolski, Tymoteusz Ciuk
Summary: The ability to measure magnetic fields accurately in extreme operating conditions is crucial for modern diagnostics in future magnetic-confinement fusion devices. This study compares the effects of neutron radiation on graphene and indium antimonide thin films and finds that graphene is less affected by neutron radiation compared to indium antimonide.
Article
Chemistry, Physical
Artur Dobrowolski, Jakub Jagiello, Tymoteusz Ciuk, Karolina Pietak, Ewelina B. Mozdzynska
Summary: This report demonstrates an experimental protocol for layer-resolved Raman imaging and analysis of graphene grown on copper foil and transferred onto an oxidized silicon substrate. The method involves evaluating the number of graphene layers by measuring the intensity of the silicon-related Raman-active mode. The results show that this method offers a more accurate assessment of the graphene layers compared to other indicators.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Aleksanda Przewloka, Adil Rehman, Serguei Smirnov, Ewelina Karpierz-Marczewska, Aleksandra Krajewska, Malwina Liszewska, Piotr Drozdz, Krystian Pavlov, Maksym Dub, Serhi Novytskyi, Bartlomiej Jankiewicz, Zygmunt Mierczyk, Sergey Rumyantsev, Dmitri Lioubtchenko
Summary: This paper describes the non-covalent modification of single-walled carbon nanotubes (SWCNT) with methyl viologen (MV), which successfully changed the conductivity type from p-type to n-type. The properties of pristine and MV-modified SWCNT were compared using various techniques, and the change in conductivity type was confirmed through different measurements.
Article
Materials Science, Multidisciplinary
Piotr A. Drozdz, Nikolaos Xenidis, James Campion, Serguei Smirnov, Aleksandra Przewloka, Aleksandra Krajewska, Maciej Haras, Albert Nasibulin, Joachim Oberhammer, Dmitri Lioubtchenko
Summary: This article presents the application of modified few-walled carbon nanotubes/nanofibrillar cellulose (FWCNT/NFC) aerogels as absorbers of electromagnetic waves in a standard terahertz hollow waveguide. The hybrid aerogels are prepared by freeze-drying and characterized through microscopy and spectroscopy. The materials show excellent absorption performance and could be a promising candidate for terahertz waveguide terminations.
APPLIED MATERIALS TODAY
(2022)
Article
Physics, Applied
J. Smulko, K. Drozdowska, A. Rehman, T. Welearegay, L. Osterlund, S. Rumyantsev, G. Cywinski, B. Stonio, A. Krajewska, M. Filipiak, P. Sai
Summary: We investigated the electrical properties and noise characteristics of Au nanoparticle-decorated graphene-Si Schottky barrier diodes. By introducing organic vapors or yellow light illumination, we observed shifts in the DC characteristics and differences in low-frequency noise, suggesting the potential for utilizing flicker noise for gas detection in these devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Wiktoria Reddig, Marta Przychodnia, Tymoteusz Ciuk, Semir El-Ahmar
Summary: In this study, the high-temperature stability of graphene-based and Sn-doped InSb-based sensing platforms were compared under identical conditions. The graphene-based platform showed better stability in variable temperature tests, while the InSb-based platform exhibited superior temperature stability up to 200°C.
IEEE SENSORS LETTERS
(2023)
