Article
Chemistry, Physical
Yang Liu, Wenhao Wu, Shixian Yang, Ping Yang
Summary: The thermal transport performance and thermal rectification characteristics of graphene/MoS2 heterointerface (G/M) are comprehensively studied in this paper. The influence of vacancy defects and temperature on the interfacial thermal conductance (G) is investigated. The results provide theoretical support for the application of graphene/MoS2 heterojunctions in heat rectifier devices.
SURFACES AND INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Jing Zhou, Kunming Yang, Bihuan Yang, Boan Zhong, Songsong Yao, Youcao Ma, Jian Song, Tongxiang Fan, Dawei Tang, Jie Zhu, Yue Liu
Summary: Graphene has great potential for thermal management applications due to its high thermal conductivity. However, the low interface thermal conductance between graphene and metals limits its effective heat dissipation. In this study, the interfacial electron behaviors were investigated by comparing hydrogenation-treated graphene with pure graphene, and the effect of graphene layer numbers on the interfacial thermal conductance was systematically studied. The results showed that a larger interfacial thermal conductance can be obtained with lower layer numbers.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Jing Zhou, Kunming Yang, Bihuan Yang, Boan Zhong, Songsong Yao, Youcao Ma, Jian Song, Tongxiang Fan, Dawei Tang, Jie Zhu, Yue Liu
Summary: As a typical two-dimensional material, graphene has high in-plane thermal conductivity but low interface thermal conductance with metals, limiting its effectiveness in thermal management. This study investigates the interfacial electron behaviors between hydrogenation-treated graphene and nickel nanofilms. The results show that a larger interface thermal conductance can be obtained when the layer number is low, possibly reaching a peak value at a certain layer number.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Thermodynamics
Chao Yang, Jian Wang, Dezhi Ma, Zhiqiang Li, Zhiyuan He, Linhua Liu, Zhiwei Fu, Jia-Yue Yang
Summary: Diamond substrate with superior thermal conductivity has been considered as a potential solution for heat dissipation in GaN-based power electronics. However, the effects of high concentration Ga/N atomic vacancies on phonon transport across the GaN-diamond interface remain largely unexplored. This study investigates the influence of vacancy-phonon scattering on the thermal resistance of the interface and provides guidance for improving the heat dissipation performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Nanoscience & Nanotechnology
W. Liu, Q. Sun, J. Zhang, X. Huang, Y. Yue
Summary: This study presents a novel approach to enhancing the interface thermal transport of graphene/substrate structure through repeated annealing, which significantly reduces the interface thermal resistance. Atomic force microscopy (AFM) images vividly illustrate the modulation of the surface structure due to repeated annealing, with the initial loose structure becoming tighter and the wrinkle flattened. The presence of wrinkles in the graphene leads to a significantly reduced phonon coupling rate between graphene and SiO2, as revealed by further phonon transport analysis.
MATERIALS TODAY NANO
(2023)
Article
Chemistry, Physical
Stephen Hocker, Hansjoerg Lipp, Siegfried Schmauder, Alexander V. Bakulin, Svetlana E. Kulkova
Summary: The interfacial bonding of three different semi-coherent bcc-Fe(110)/graphene interfaces was investigated using density functional theory. The results showed that the interfacial adhesion can be understood from the electronic structure. The influence of single vacancies in graphene on the Fe(110) surfaces was also studied, and it was found that a single vacancy leads to a strong increase in interfacial adhesion.
APPLIED SURFACE SCIENCE
(2022)
Article
Thermodynamics
Xiaona Huang, Jiang Guo, Yanan Yue
Summary: Graphene/SiC nanocomposites exhibit excellent irradiation resistance. This study investigates the enhancement of SiC's irradiation resistance by graphene layers and the effect of irradiation on the thermal conductance of the composite through molecular dynamics simulations. The results demonstrate that graphene layers effectively enhance the irradiation resistance of SiC, and the thermal conductance of the composite is increased after irradiation with carbon primary knock-on atom (PICA). Furthermore, the interface thermal resistance decreases due to the formed bonds between the graphene layers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Physics, Multidisciplinary
Liu Dong-Jing, Wang Shao-Ming, Yang Ping
Summary: The thermal conductance of graphene/silicon carbide heterogeneous interface is affected by temperature, size, and material defect rate. The introduction of vacancy defects can effectively improve the interface thermal conductance. Utilizing size effect and vacancy defect to modify the heterogeneous interface can be beneficial for third-generation semiconductor micro-nano devices design and thermal management.
ACTA PHYSICA SINICA
(2021)
Article
Chemistry, Multidisciplinary
Yongsheng Zhao, Fengyun Yan, Xue Liu, Hongfeng Ma, Zhenyu Zhang, Aisheng Jiao
Summary: The influence of electric field on thermal conductivity of diamond in different crystal orientation groups was investigated using first-principles calculations. The results revealed that electric field can break the symmetry of diamond lattice and affect the thermodynamic and phonon properties of diamond, leading to changes in its thermal conductivity.
Article
Chemistry, Physical
Peng Gao, Xihao Chen, Ning Wang, Jiwen Li, Hua Tang, Zonghang Liu, Fuqiang Zhai
Summary: With the rapid development of material preparation and quantum computation technologies, the discovery of superior electronic devices in the nanoscale has been widely facilitated. For materials for application in thermoelectric and thermal conductivity devices, their overall performance can be demonstrated by their inner heat transport efficiency. The study focuses on a novel carbon monolayer (net-Y) and assesses its practical applicability in electronic device design using first-principles calculations. Through a comparative study with graphene, the heat transport mechanism of net-Y was successfully summarized.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Thermodynamics
Yiling Liu, Lin Qiu, Jinlong Liu, Yanhui Feng
Summary: The thermal properties of two-dimensional materials and their heterostructures are studied using non-equilibrium molecular dynamics simulations. The interfacial thermal conductance of a diamond/graphene heterostructure is found to be influenced by the graphene layer count and temperature. The results show that a single-layer graphene heterostructure exhibits higher interfacial thermal conductance compared to a multi-layer graphene heterostructure. Higher temperature promotes phonon coupling between diamond and graphene, leading to an increase in interfacial thermal conductance. (c) 2023 Elsevier Ltd. All rights reserved.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Multidisciplinary
Zhujun Huang, Edoardo Cuniberto, Suji Park, Kim Kisslinger, Qin Wu, Takashi Taniguchi, Kenji Watanabe, Kevin G. Yager, Davood Shahrjerdi
Summary: Heterostructures obtained from layered assembly of 2D materials have potential in new electronic device development, but achieving atomically clean interfaces remains a challenge. This study experimentally investigates the interface cleaning problem of polymer-contaminated heterostructures from an energy viewpoint and proposes a mechanism for fabricating large and clean heterostructures.
Article
Materials Science, Multidisciplinary
Joshua Claes, Bart Partoens, Dirk Lamoen
Summary: The DFT-21 method is a band-gap correction with GW precision that allows for the calculation of optical transitions between defect levels. However, it fails when the atomic character of the occupied and unoccupied defect levels is similar. We propose the decoupled DFT-12 method to solve this problem.
Article
Nanoscience & Nanotechnology
Sriharsha Sudhindra, Farnia Rashvand, Dylan Wright, Zahra Barani, Aleksey D. Drozdov, Saba Baraghani, Claudia Backes, Fariborz Kargar, Alexander A. Balandin
Summary: The study revealed that increasing the size of graphene fillers enhances the thermal conductivity of composites, with fillers of 1200 nm lateral dimensions exhibiting lower thermal contact resistance. The effects of filler loading fraction and size on thermal conductivity were rationalized using the Kanari model. These findings are crucial for optimizing graphene fillers in thermal interface materials for efficient heat removal in high-power-density electronics.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Yanru Chen, Kai Pang, Xiaoting Liu, Kaiwen Li, Jiahao Lu, Shengying Cai, Yingjun Liu, Zhen Xu, Chao Gao
Summary: The rapid development of high-power and high-frequency devices in electronics creates a need for advanced thermal interface materials (TIMs) with high thermal conductivity and structural stability. Previous attempts using silicone-based TIMs with highly thermally conductive fillers have struggled with structural stability in extreme conditions. In this study, we fabricated a flexible TIM called graphene foam roll (GFR) using hydroplastic foaming and interface strengthening methods. By impregnating graphene oxide (GO) into the GFR, we achieved enhanced interface bonding and superior structural integrity. The GFR-TIM exhibited both exceptional structural stability, maintaining mechanical stability after 10,000 cycles at 60% compressive strain, and high temperature resistance up to 500 degrees C, which has not been reported before. Additionally, the GFR-TIM demonstrated higher thermal conductivity (approximately 17.42 W/mK) compared to most commercial TIMs (5-10 W/mK). It can serve as an efficient heat-dissipation component for CPUs and has superior cooling efficiency compared to commercial TIMs. This work presents an advanced graphene-based TIM with excellent environmental adaptability and anti-fatigue properties, expanding its applications in extreme environments such as hypersonic vehicles, high-throughput satellites, and high-power radar systems.
Article
Nanoscience & Nanotechnology
Xiao Chi, Rui Guo, Juxia Xiong, Lizhu Ren, Xinwen Peng, Beng Kang Tay, Jingsheng Chen
Summary: The study demonstrates a significant ferroelectric modulation of TMR in ferroelectric/magnetic MTJs, highlighting the interface electronic and magnetic reconstructions driven by ferroelectric polarization switching. This robust coupling between BTO and LSMO at the interface results in a giant electrical modulation of TMR, shedding new light on the intrinsic mechanisms governing magnetoelectric coupling for spin control in spintronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Lucas Lum, Chong-Wei Tan, Chun Fei Siah, Kun Liang, Beng Kang Tay
Summary: This study reports on the graphitisation of waste carbon powder through femtosecond laser annealing, resulting in improved electrical conductivity. Raman spectroscopy showed a transition from amorphous-like carbon to graphitic-like carbon, with conductivity increasing by up to 90%. An increase in laser power correlated with increased conductivity, but excessive power had a destructive effect. The most significant improvement in conductivity was observed at laser powers ranging from 0.526 to 1.286 W.
Article
Chemistry, Multidisciplinary
Roland Yingjie Tay, Hongling Li, Zhi Kai Ng, Siu Hon Tsang, Wei Gao, Edwin Hang Tong Teo
Summary: In this study, a new method was developed to synthesize high-quality porous graphene film by incorporating an in situ reduction-oxidation cycling treatment. The graphene film exhibited a holey surface with interconnected ligaments within its porous interior, resulting in superior in-plane electrical conductivity. Compared to state-of-the-art electromagnetic interference shielding materials, this porous graphene film showed excellent performance with high specific and absolute shielding effectiveness.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Analytical
Xingli Wang, Junyu Ge, Nicole Ru-Xuan Ang, Kun Liang, Chong-Wei Tan, Hong Li, Beng Kang Tay
Summary: In this study, Sb nanofilms with lateral dimensions on the centimeter scale and controllable film thickness were successfully prepared using low-power magnetron sputtering deposition. The control of the deposition temperature was found to be important for the final crystalline structure of the nanofilms. Furthermore, the application of the nanofilms as a catalyst for water splitting was demonstrated.
Review
Physics, Applied
M. Shrestha, G. K. Lau, A. K. Bastola, Z. Lu, A. Asundi, E. H. T. Teo
Summary: Most modern high-rise buildings use glass facades, but this can result in issues such as compromised visual privacy and energy loss. Optically tunable windows, which can adjust daylighting, heat radiation, and transparency, are seen as a potential solution. However, existing commercial options have limitations, such as high cost and limited performance. Therefore, researchers are exploring low-cost actively tunable windows. However, most of these emerging technologies do not meet all the requirements. To fully understand and improve these technologies, an in-depth review of their optical principles is essential.
APPLIED PHYSICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Shiyong Huang, Zhi Kai Ng, Hongling Li, Apoorva Chaturvedi, Jian Wei Mark Lim, Roland Yingjie Tay, Edwin Hang Tong Teo, Shuyan Xu, Kostya (Ken) Ostrikov, Siu Hon Tsang
Summary: This study demonstrates the excellent stability of hexagonal boron nitride nanosheets (hBNNS) under extreme conditions such as high-energy ions and reactive atomic oxygen. The results highlight the potential of hBNNS films as protective, thermally conductive, and insulating layers in spacecrafts, electric plasma satellite thrusters, and semiconductor optoelectronic devices.
Review
Engineering, Mechanical
Jueyu Chen, Edwin Hang Tong Teo, Kui Yao
Summary: Haptic technology, which uses actuators to provide tactile feedback for human-computer interaction, is increasingly being applied in electronic devices. This review compares four types of electromechanical actuators: electromagnetic, electrostatic, piezoelectric, and electrostrictive actuators, for achieving haptic feedback. The driving principles, working conditions, applicable scopes, and characteristics of these actuators are fully compared. The design and values of piezoelectric actuators for achieving sophisticated and high-definition haptic effects are particularly emphasized. The current status and future directions of different types of haptic actuators are discussed.
Article
Biotechnology & Applied Microbiology
Milan Shrestha, Leonardus Depari, Maziar Shakerzadeh, Ranjana Shivakumar, Edwin H. T. Teo
Summary: Researchers developed a viscous composite ink with PEDOT:PSS and PDMS for coating on untreated PDMS, allowing for more uniform and adhesive ink-based electrodes. These coatings are transparent, stretchable, electrically conductive, and act as compliant electrodes. They also fabricated transparent dielectric elastomer actuators using PEDOT:PSS/PDMS electrodes, which had slightly lower actuation strain and breakdown fields compared to traditional graphite electrodes, but improved robustness in localized dielectric breakdown events.
SENSORS AND ACTUATORS REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Hongling Li, Zhi Kai Ng, Roland Yingjie Tay, Shiyong Huang, Siu Hon Tsang, Edwin Hang Tong Teo
Summary: In this study, graphene/MXene composite thin films with excellent flexibility and EMI shielding capability were fabricated. The composite thin films exhibited high EMI shielding effectiveness and superb electrothermal conversion capability, providing a facile method for EMI shielding and thermal management applications in next-generation flexible electronics.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Joseph M. de Saxce, Chun Fei Siah, Tan Chong Wei, Damien Passerieux, Stephane Bila, Florence Podevin, Beng Kang Tay, Philippe Coquet, Dominique Baillargeat
Summary: This letter presents a novel E-band vertically aligned carbon nanotubes-based air-filled waveguide (AFWG). The waveguide is designed using a full-wave three-dimensional electromagnetic software and an equivalent VACNTs bulk model, and fabricated using a CMOS compatible CNTs transfer process and a dedicated assembly process. The concept of the CNTs-based AFWG is validated for the first time through measurements, with an experimental attenuation constant estimated at 0.5 dB/mm between 81 and 86 GHz.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Hong Chen, Lianzheng Li, Jinbin Wang, Guangchao Zhao, Yida Li, Jun Lan, Beng Kang Tay, Gaokuo Zhong, Jiangyu Li, Mingqiang Huang
Summary: In this study, the performance of hafnium oxide memristor has been optimized using low-temperature atomic layer deposition and post-metal annealing methods. The device exhibits high performance and compatibility with the CMOS back-end-of-line process, making it a potential candidate for implementing artificial intelligence neural networks.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Mingqiang Huang, Guangchao Zhao, Xingli Wang, Wei Zhang, Philippe Coquet, Beng Kang Tay, Gaokuo Zhong, Jiangyu Li
Summary: This work presents a neuromorphic computing system based on memristors, utilizing a global gate controlled one transistor one digital memristor (1T1DM) architecture as the basic binary electronic synapse. The system successfully implements low-bit neuromorphic computing, offering a lightweight, robust alternative to traditional analogue memristor networks for challenging visual tasks.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Soon Siang Chng, Minmin Zhu, Zehui Du, Xizu Wang, Matthew Whiteside, Zhi Kai Ng, Maziar Shakerzadeh, Siu Hon Tsang, Edwin Hang Tong Teo
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Materials Science, Multidisciplinary
Dongyang Xiao, Minmin Zhu, Qian Wang, Leimeng Sun, Chun Zhao, Zhi Kai Ng, Edwin Hang Tong Teo, Fangjing Hu, Liangcheng Tu
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Materials Science, Multidisciplinary
Soon Siang Chng, Minmin Zhu, Jing Wu, Xizu Wang, Zhi Kai Ng, Keke Zhang, Chongyang Liu, Maziar Shakerzadeh, Siuhon Tsang, Edwin Hang Tong Teo
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
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)