Article
Materials Science, Multidisciplinary
F. Bonetto, C. Silva, E. H. Martins Ferreira, A. Candia, M. C. G. Passeggi, S. Montoro, R. Vidal
Summary: Electron beam induced deposition using ethylene as precursor gas is utilized to produce carbonaceous films on Cu (111). The study investigates two different precursor gas pressures and two substrate temperatures, finding that lower substrate temperature and higher ethylene pressure lead to optimal film growth conditions. Additionally, ex-situ techniques such as Raman spectroscopy and scanning tunneling spectroscopy show that the film consists of small nanocrystals of few layers graphene.
Article
Materials Science, Multidisciplinary
Nikita Siminel, Konstantin N. Galkin, Ernest Arushanov, Nikolay G. Galkin
Summary: This study firstly observed the photoconductivity in epitaxial Ca2Si film and determined several thermodynamic parameters and the nature of the fundamental transition.
Article
Materials Science, Multidisciplinary
Subrata Mandal, Chirantan Das, Subhrajit Sikdar, Basudev Nag Chowdhury, Pintu Singha, Aritra Banerjee, Anupam Karmakar, Sanatan Chattopadhyay
Summary: In this study, a substrate engineered patterned array of square-shaped features of size 1.5 μm x 1.5 μm, comprising of <111>/[100]-planes of p-Si substrate, was successfully developed using electron beam lithography assisted selective anisotropic wet etching. The exposed <111>/[100]-planes were confirmed by FESEM imaging and X-ray diffraction study. The surface engineered Si-substrates have potential applications in electronic, optoelectronic, and bio-sensing devices.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Physics, Multidisciplinary
S. Lu, K. Peng, P. D. Wang, A. X. Chen, W. Ren, X. W. Fang, Y. Wu, Z. Y. Li, H. F. Li, F. Y. Cheng, K. L. Xiong, J. Y. Yang, J. Z. Wang, S. A. Ding, Y. P. Jiang, L. Wang, Q. Li, F. S. Li, L. F. Chi
Summary: Monolayer hexagonal MnTe2, synthesized using molecular beam epitaxy under Te rich condition, is found to be a semiconductor with a large bandgap of around 2.78 eV. The valence state of Mn4+ and the atom ratio of ([Te]:[Mn]) confirm the MnTe2 compound.
Article
Chemistry, Physical
Fabio Ronci, Stefano Colonna, Roberto Flammini, Maurizio De Crescenzi, Manuela Scarselli, Matteo Salvato, Isabelle Berbezier, Holger Vach, Paola Castrucci
Summary: In this paper, an in-depth study was conducted on the growth of nickel silicides under different conditions. It was found that two different nickel silicides form progressively as the annealing temperature increases. The presence of a graphene layer does not alter the nature of the silicide phases but affects the morphology of the silicide overlayer.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Alberto Binetti, Wei-Fan Hsu, Koen Schouteden, Jin Won Seo, Jean-Pierre Locquet, Maria Recaman Payo
Summary: Vanadium sesquioxide (V2O3) is a promising material for new-generation sensors or smart devices due to its strong correlation effects and tunable metal-insulator transitions. The successful growth of epitaxial thin films on silicon substrates has been achieved by adjusting the growth conditions, and extensive characterization has been carried out. Structural analysis reveals the impact of temperature on thin film microstructures, and the lattice mismatch between silicon and V2O3 induces the growth of the corundum PI phase. Additionally, small deviations from stoichiometry significantly affect the resistivity change upon cooling.
RESULTS IN PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Kexue Li, Jian Zhang, Jilong Tang, Yubin Kang, Fengyuan Lin, Xiaobing Hou, Zhipeng Wei, Qun Hao
Summary: In this study, self-catalyzed GaAs and GaAsSb nanowires (NWs) were grown on Si (111) substrates using solid-source molecular-beam epitaxy (MBE), and the influence of Sb components on the growth direction of the nanowires in the ternary GaAsSb alloy was examined. It was found that as the Sb component increased, the nanowires were more likely to grow parallel to the surface of the Si (111) substrate. X-ray diffraction and Raman spectroscopy confirmed the presence of Sb components and indicated high crystalline quality, and X-ray diffraction confirmed the alignment of Sb components with the intended structure. These findings provide a solid material foundation for the development of high-performance GaAsSb-based devices.
Article
Engineering, Multidisciplinary
Mi-Mi Huang, Li-Bo Zhao, Xiang-Guang Han, Chen Jia, Yi Gao, Shu Fan, Ping Yang, Linxi Dong, Zhuang-De Jiang
Summary: A thin film temperature sensor chip was fabricated using micro electromechanical systems technology, with a Ti/Pt film layer on a silicon substrate. The chip's electrical properties and structural characteristics were evaluated through annealing experiments and testing.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Kanghui Wang, Min Zhang, Tixian Zeng, Fan He, Wei Wen
Summary: InSb films were deposited on Si (111) substrate using CdTe buffer layers, which significantly improved the crystal structure, morphology, optical, and electrical properties of the films. The CdTe buffer layer reduced stress and improved the grain size of InSb films, while also controlling the appearance of dislocations at the interface. The insertion of a CdTe buffer layer also affected the surface roughness and carrier mobility of InSb films, making it an effective method to enhance the performance of InSb films.
Article
Chemistry, Physical
Maya N. Nair, Arlensiu Celis, Francois Nicolas, Stefan Kubsky, Amina Taleb-Ibrahimi, Antonio Tejeda
Summary: The study investigates the atomic structure and electronic properties of monolayer graphene on a curved multi-nano-vicinal Pt (1 1 1) substrate, revealing that the growth of graphene and its spatial periodicity are influenced by the vicinal angle of the substrate. The superperiodicity of the substrate plays a key role in opening bandgaps in graphene, affecting the linear pi band and minigaps in the electronic properties. These findings suggest a simple method to tune the electronic properties of epitaxial graphene by controlling the substrate vicinality.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Lianbi Li, Lei Li, Binbin Ding, Rong Wang, Yuan Zang, Jichao Hu, Song Feng, Lin Cheng, Pengfei Cheng, Guoqing Zhang, Caijuan Xia
Summary: A near-infrared photodetector was directly deposited on graphene substrate by electron beam evaporation. The Ge annealed at 500 degrees C exhibited good crystal quality. Then PDMS/PMMA was used to transfer the heterojunction to a flexible substrate, showing high performance in near-infrared absorption. Additionally, the device had a photoresponsivity of 0.073 A W-1 and Ilight/Idark ratio of 1.5 x 103 at zero bias.
Article
Chemistry, Multidisciplinary
Takuhiro Kakiuchi, Tomoki Matoba, Daisuke Koyama, Yuki Yamamoto, Akitaka Yoshigoe
Summary: The oxidation mechanism of hafnium overlayers on an Si(111) substrate was investigated, showing that metallic hafnium and interfacial HfSi were oxidized via different pathways.
Article
Engineering, Electrical & Electronic
Liang Xu, Jiahao Meng, Zhihui Yang, Jiasheng Li, Xinrui Ding, Zong-Tao Li
Summary: High-efficiency mini-LEDs with a large light-emitting angle were prepared using a dome-shaped SiO2/Al(2)O(3) composite-patterned sapphire substrate (CPSS). Comparisons with a contrast group showed that CPSS-LED chips had higher external quantum efficiency (EQE) and a larger light-emitting angle, resulting in improved HDR performance and better light mixing effect in mini-LED backlight modules. This research is important for the development of future LCD displays.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Physics, Multidisciplinary
Chaodan Chi, Jiajie Lin, Xingyou Chen, Chengli Wang, Ziping Li, Liping Zhang, Zhanglong Fu, Xiaomeng Zhao, Hua Li, Tiangui You, Li Yue, Jiaxiang Zhang, Niefeng Sun, Peng Gao, Robert Kudrawiec, Shumin Wang, Xin Ou
Summary: This paper demonstrates and compares InGaAs p-i-n photodetectors on InP/SiO2/Si (InPOI) substrate fabricated by ion-slicing technology with identical devices on a commercial InP substrate. The photo responsivities at 1.55 μm are similar, indicating comparable performance between the two devices. The ion-slicing technology shows promise in enabling high-quality Si-based InP platforms for full photonic integration on a Si substrate.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2021)
Article
Materials Science, Multidisciplinary
Xi Chen, Wenjie Li, Lebin Wang, Yingming Zhao, Xiang Zhang, Yao Li, Jiupeng Zhao
Summary: This study demonstrates that Mg2+ is an efficient EC insertion ion for addressing the issues in EC devices. Annealing affects the properties of WO3 films, with films annealed at 200 degrees Celsius showing the best performance, and the ΔT of the EC device structure is approximately 34.6%.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Le Ngoc Long, Pham Tan Thi, Pham Trung Kien, Pham Thanh Trung, Masataka Ohtani, Yoshitaka Kumabe, Hirofumi Tanaka, Shigenori Ueda, Hyoyoung Lee, Phan Bach Thang, Tran Van Khai
APPLIED SURFACE SCIENCE
(2020)
Article
Nanoscience & Nanotechnology
Roshan Castelino, Trung T. Pham, Alexandre Felten, Robert Sporken
Article
Chemistry, Physical
Mehdi Bouatou, Cyril Chacon, Frederic Joucken, Yann Girard, Vincent Repain, Amandine Bellec, Sylvie Rousset, Robert Sporken, Cesar Gonzalez, Yannick J. Dappe, Jerome Lagoute
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Chemistry, Physical
Trung T. Pham, Roshan Castelino, Alexandre Felten, Robert Sporken
APPLIED SURFACE SCIENCE
(2020)
Article
Chemistry, Physical
Mehdi Bouatou, Rishav Harsh, Frederic Joucken, Cyril Chacon, Vincent Repain, Amandine Bellec, Yann Girard, Sylvie Rousset, Robert Sporken, Fei Gao, Mads Brandbyge, Yannick J. Dappe, Cyrille Barreteau, Alexander Smogunov, Jerome Lagoute
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Mehdi Bouatou, Sourav Mondal, Cyril Chacon, Frederic Joucken, Yann Girard, Vincent Repain, Amandine Bellec, Sylvie Rousset, Shobhana Narasimhan, Robert Sporken, Yannick J. Dappe, Jerome Lagoute
Article
Chemistry, Applied
Duong Chi Trung, Trung Thanh Pham, Quoc Binh Phan Minh, Casen Panaitescu, Ngoc Quyen Tran, Ha Tuan Anh, Lai Xuan Bach, Nam Nguyen Dang
Summary: Leaf extracts are effective in inhibiting the corrosion of steel in an acidic environment, forming a compact, robust, and uniform protective film. Increasing the concentration of PBLE can enhance the inhibition efficiency, but excessive concentration may decrease the effectiveness of inhibition.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Chemistry, Physical
Trung T. Pham, Roshan Castelino, Alexandre Felten, Robert Sporken
Summary: In this paper, we report the successful synthesis of single phase 2H-MoTe2 compound on graphene-terminated 6H-SiC(0001) substrate and the effective recovery of its clean surface after exposure to air. The films are analyzed in detail using reflection high energy electron diffraction, X-ray photoemission spectroscopy, and scanning tunneling microscopy.
SURFACES AND INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Trung T. Pham, Peter Vancso, Marton Szendro, Krisztian Palotas, Roshan Castelino, Mehdi Bouatou, Cyril Chacon, Luc Henrard, Jerome Lagoute, Robert Sporken
Summary: In this study, the direct growth of highly crystalline 2H phase of MoTe2 on graphene has been achieved by adjusting the conditions. The STM images of the MoTe2/graphene heterostructure exhibit amplified Moire potential modulations, revealing the unique higher-indexed Moire patterns and complex electronic features of the heterostructure.
NPJ 2D MATERIALS AND APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Lai Xuan Bach, Thi-Bich-Ngoc Dao, Trung T. Pham, Robert Sporken, Thi Nhung Nguyen, S. V. Prabhakar Vattikuti, Nhon Pham Van, Nam Nguyen Dang
Summary: This study proposes a new method to create a more robust thin film using SnO2 nanoparticles, which improves the corrosion resistance of carbon steel and results in a smooth and uniform protective layer. The presence of SnO2 in the protective layer directly influences the high inhibition performance.
Article
Chemistry, Multidisciplinary
Thi Tan Pham, Thanh Ngoc Pham, Viorel Chihaia, Quang Anh Vu, Thuat T. Trinh, Trung Thanh Pham, Le Van Thang, Do Ngoc Son
Summary: This study investigated the influence of N and B doping in graphene on the microscopic geometrical structure and electronic properties of adsorbed water using self-consistent van der Waals density functional theory calculations. The results showed that the binding energy of water increases almost linearly with doping content at all concentrations for N-doped graphene but only up to 6.3% for B-doped graphene. The enhancement of the water-graphene interaction was explained by analyzing the geometric and electronic structures with varying doping percentages.
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)
