Article
Chemistry, Physical
Ming Lu, Chuan Zhang, Dongdong Liu, Xinchang Wang, Fanghong Sun
Summary: Fabricating diamond films using liquid carbon source precursors in hot filament chemical vapor deposition (HFCVD) is an emerging technology. The density functional theory (DFT) method was used to analyze the decomposition and adsorption processes of acetone and methane on the surface of a diamond (1 1 1) models and to clarify the advantages of liquid carbon source precursors. The doping mechanisms of B, N, and Si elements were also analyzed by studying the decomposition and adsorption reaction processes of trimethyl borate, urea, and ethyl orthosilicate on the surface of diamond (1 1 1) model.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Mechanical
A. Gaydaychuk, S. Linnik, A. Mitulinsky, S. Zenkin
Summary: Thick diamond films were synthesized on Si substrate with different methane concentration using HFCVD method. Regardless of the microstructure, diamond coatings exhibit the same erosion mechanisms. The microcrystalline diamond coating shows the maximum erosion resistance.
Article
Chemistry, Physical
J. Narayan, A. Bhaumik, S. Gupta, P. Joshi, P. Riley, R. J. Narayan
Summary: The formation of Q-carbon layers by nanosecond laser melting of carbon layers provides diamond nucleation sites, allowing for the growth of continuous diamond films on practical substrates. The high-speed conversion of laser pulses enables the potential production of large-scale diamond films.
Article
Chemistry, Physical
A. Gaydaychuk, S. Linnik, A. Mitulinsky, S. Zenkin, V. Bulakh
Summary: The paper presents diamond films with dendrite-like or nanofeathers structure, synthesized in different gas mixtures. These diamond dendrites consist of diamond crystallites of various sizes and non-diamond carbon, with a height comparable to the film thickness and a lateral size not exceeding 200 nm. The nitrogen content in the gas mixture affects the size, residual stresses, roughness, hardness, and Young's modulus of the resulting diamond films.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Xinchang Wang, Enzhi Liu, Weihan Li, Yu Qiao, Fanghong Sun, Da Shu
Summary: A new method for fabricating high-quality double-side-polished freestanding diamond films is proposed in this study. By depositing diamond films on SiC substrates and polishing and separating them, the fracture of diamond films can be avoided and the reusability of SiC substrates can be improved.
Article
Materials Science, Multidisciplinary
Yuhou Wu, Huisen Zhang, Guangyu Yan, Lusheng Liu, Daniel Cristea, He Wang, Yumiao Yang, Jianhui Shen
Summary: The study analyzed the influence of key parameters in hot filament chemical vapor deposition on temperature distribution during diamond coating deposition on silicon nitride substrates using finite element method. The accuracy of the model was verified through experimental measurements, leading to the design of an optimal hot filament arrangement and deposition parameters for higher quality diamond films.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Biochemistry & Molecular Biology
Feng Lu, Tianwei Liu, Xu Bai, Yuhou Wu, He Wang, Guangyu Yan
Summary: Diamond films were deposited on silicon nitride substrates with different roughnesses, and their tribological properties were studied. The results showed that diamond films can significantly reduce the friction coefficient and improve wear resistance.
Article
Materials Science, Coatings & Films
Qiang Lin, Sulin Chen, Zhe Ji, Zhewei Huang, Zhinan Zhang, Bin Shen
Summary: This study demonstrates the deposition of UNCD films can be achieved in CH4/H-2 chemistry without Ar, and the re-nucleation rate can be specifically regulated by adjusting gas pressure and carbon concentration. A novel kinetic growth model was established to interpret the UNCD growth mechanism with CH4/H-2 chemistry, and the atmospheric window for the deposition of UNCD films was obtained. The study provides insights into the UNCD growth mechanism without Ar content and simplifies the gas strategy for UNCD growth.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Ming Lu, Dongdong Liu, Chuan Zhang, Fanghong Sun
Summary: The oxidation resistance of diamond films is crucial for their performance in high-temperature applications. This study uses density functional theory (DFT) to investigate the influence of multiple doping on the oxidation resistance of diamond films and find the optimal doping configuration. Experimental results and theoretical calculations both demonstrate that multiple doping can effectively reduce the high-temperature oxidation rate of diamond films.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Xinchang Wang, Xin Song, Yu Qiao, Karin Larsson, Fanghong Sun
Summary: This paper investigates the synthesis of nitrogen-doped diamonds using different doping sources, and analyzes the effects of urea and N2 on the growth and properties of diamond films. The results show that urea has a higher doping efficiency and has less impact on diamond purity and mechanical properties compared to N2. By selecting the doping source and optimizing the doping ratio, the growth and properties of diamond films can be controlled to meet specific application requirements.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Chemistry, Physical
J. Narayan, N. Khosla
Summary: This paper reports the formation and self-organization of amorphous Q-carbon and Q-BN nanoballs, and discusses their properties and potential applications.
Article
Materials Science, Coatings & Films
Hua Wang, Chengchuan Wang, Xinchang Wang, Fanghong Sun
Summary: This study investigates the effects of carbon concentration and gas pressure on various polycrystalline diamond films synthesized with HFCVD method. By adjusting carbon concentration and gas pressure, diamond films with different crystal structures and surface properties can be obtained. Achieving a dynamic equilibrium between renucleation rate and removal rate under hydrogen-rich gas chemistry is crucial for high-quality UNCD film synthesis.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Weihua Wang, Shilin Yang, Benjian Liu, Xiaobin Hao, Jiecai Han, Bing Dai, Jiaqi Zhu
Summary: This study experimentally investigates several aspects of the bias process for heteroepitaxial diamond nucleation. It is found that the diamond-nucleation pathway transforms from isolated-crystal nucleation to typical domain nucleation and back to isolated-crystal nucleation as bias time increases. A correlation is observed between bias voltage and bias time, where higher bias voltage leads to shorter bias time. Moreover, a relationship is established between threshold bias voltage and reactor-chamber pressure. Lastly, enhanced diamond nucleation and growth are observed at high CH4 content.
Article
Materials Science, Multidisciplinary
Xiufei Hu, Yan Peng, Xiwei Wang, Xiaotong Han, Bin Li, Yiqiu Yang, Mingsheng Xu, Xiangang Xu, Jisheng Han, Dufu Wang, Kuan Yew Cheong
Summary: In this study, diamond was deposited on mirror-like polished, grinded, and grooved 4H-SiC substrates using microwave plasma chemical vapor deposition. The effects of different growth time and concentrations of methane in hydrogen on the nucleation process and grain morphology were investigated. It was found that grinding the substrate significantly increased the nucleation density, and the concentration of methane played a crucial role in nucleation density, grain size, and facet development. The transformation from nucleation to continuous film was observed on the side wall of the grooved substrate.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Tianzong Xu, Kyriakos Komvopoulos
Summary: The nucleation and growth of diamond from submicron clusters consisting of amorphous carbon phase and diamond nanocrystallites were investigated. The carbon clusters were created by exposing a highly sp(3)-hybridized carbon thin film to a low-temperature, methane-rich hydrogen plasma. Diamond nanocrystallites inside the carbon clusters acted as nucleation sites. The results provided insights into the structure and composition of the carbon clusters, diamond nanocrystallites, and amorphous interlayers at the interfaces.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Anbo Cao, Bin Shen, Qiang Lin, Sulin Chen, Zhewei Huang, Zhe Ji, Zhinan Zhang
COMPUTATIONAL MATERIALS SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Jie Cheng, Sulin Chen, Fan Zhang, Bin Shen, Xinchun Lu, Jinshan Pan
Article
Chemistry, Physical
Bin Shen, Sulin Chen, Zhewei Huang, Zhe Ji, Qiang Lin, Zhinan Zhang
APPLIED SURFACE SCIENCE
(2020)
Article
Automation & Control Systems
Bin Shen, Yufei Gui, Biao Chen, Zichao Lin, Qi Liu, Qizheng Liu
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Zhewei Huang, Qiang Lin, Zhe Ji, Sulin Chen, Bin Shen
ADVANCED MATERIALS INTERFACES
(2020)
Article
Materials Science, Coatings & Films
Qiang Lin, Sulin Chen, Zhe Ji, Zhewei Huang, Zhinan Zhang, Bin Shen
SURFACE & COATINGS TECHNOLOGY
(2020)
Article
Engineering, Aerospace
Yufei Gui, Qi Liu, Yun Zhu, Sulin Chen, Bin Shen
Summary: Micro-forging is a novel surface modification technology that can simultaneously smooth and strengthen the workpiece surface, with an input voltage optimization method proposed to ensure stable movement. Experimental results show that MF treatment significantly improves the quality of Ti-6Al-4V surfaces, laying a solid foundation for the application of micro-forging technology in surface modification.
CHINESE JOURNAL OF AERONAUTICS
(2021)
Review
Engineering, Manufacturing
Qiang Lin, Sulin Chen, Bin Shen, Fanghong Sun
Summary: Drawing dies have been crucial in the cold-forming industry for centuries, especially with the rising demands for productivity and quality. Recent developments have focused on diamond-coated dies fabricated via chemical vapor deposition, showing great potential in modern drawing production. This paper reviews the state-of-the-art development and applications of CVD diamond-coated drawing dies, with particular emphasis on design, fabrication, and usage.
MATERIALS AND MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Multidisciplinary
Sulin Chen, Bin Shen, Zhewei Huang, Zhe Ji, Qiang Lin, Zhinan Zhang
Summary: The study revealed the impact of substrate deformation on the friction behavior of graphene through molecular dynamics simulations. Despite the elastic nature of substrate deformation, a pinning effect on the tip occurs within the deformed region, resulting in increased friction.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Zhewei Huang, Sulin Chen, Qiang Lin, Zhe Ji, Peng Gong, Zhengzong Sun, Bin Shen
Summary: Wrinkles are commonly found on the surface of graphene, leading to increased friction and lubrication degradation. Through nanoscratch tests and molecular dynamics simulations, the mechanisms underlying the friction evolution of wrinkles are revealed.
Article
Materials Science, Coatings & Films
Qiang Lin, Sulin Chen, Zhe Ji, Zhewei Huang, Zhinan Zhang, Bin Shen
Summary: This study demonstrates the deposition of UNCD films can be achieved in CH4/H-2 chemistry without Ar, and the re-nucleation rate can be specifically regulated by adjusting gas pressure and carbon concentration. A novel kinetic growth model was established to interpret the UNCD growth mechanism with CH4/H-2 chemistry, and the atmospheric window for the deposition of UNCD films was obtained. The study provides insights into the UNCD growth mechanism without Ar content and simplifies the gas strategy for UNCD growth.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Qiang Lin, Sulin Chen, Zhe Ji, Zhewei Huang, Zhinan Zhang, Bin Shen
Summary: The study revealed that the wear of diamond films at low temperatures is mainly induced by the strong adhesion between diamond and titanium, while at high temperatures, oxygen significantly etches the diamond films, causing loss of carbon atoms and increased wear.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Zhe Ji, Qiang Lin, Zhewei Huang, Sulin Chen, Peng Gong, Zhengzong Sun, Bin Shen
Summary: The study investigated the frictional behavior of graphene nanowall (GNW) films and found a nonlinear relationship between frictional force and normal load, as well as a significant impact of the strain property of the GNW film on its frictional force.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Zhe Ji, Qiang Lin, Zhewei Huang, Sulin Chen, Peng Gong, Zhengzong Sun, Bin Shen
Summary: This study demonstrates a novel process of in-situ fabrication of graphene sheets using the chemical vapor deposition (CVD) method, which decreases the stable coefficient of friction on microcrystalline diamond films and shows excellent load capacity and durability. The findings provide an effective approach to enhance the lubricity of any engineering diamond surface.
Article
Engineering, Mechanical
Zhewei Huang, Sulin Chen, Qiang Lin, Zhe Ji, Peng Gong, Zhengzong Sun, Bin Shen
Summary: The study reveals that surfaces with graphene folds exhibit significant friction increases at folding edges, while the folded area shows only modest changes in friction.
TRIBOLOGY INTERNATIONAL
(2022)
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)