Review
Crystallography
Karol Cieslik, Dominik Wrana, Maciej Rogala, Christian Rodenbuecher, Krzysztof Szot, Franciszek Krok
Summary: The strict control of the work function of transition metal oxide crystals is important for both fundamental research and applications. In this study, we investigated the effects of redox processes on the work function of titanium dioxide and strontium titanate crystals. We used Kelvin Probe Force Microscopy, Scanning Tunneling Microscopy, Low-Energy Electron Diffraction, and X-ray Photoelectron Spectroscopy to characterize the changes in work function and surface composition. Our results show that redox processes can modify the work function of these materials, and the presence of an oxygen-gaining material during annealing can further deepen the changes.
Article
Chemistry, Multidisciplinary
Agnieszka Stepniak-Dybala, Tomasz Jaroch, Mariusz Krawiec, Piotr Drozdz, Mariusz Golebiowski, Ryszard Zdyb
Summary: In this study, a new structural phase of a single atom thick antimony layer was successfully synthesized. The structure was found to have a flat surface and unusually large unit cell. Experimental results also showed that the structure formed a well-ordered continuous film. The findings confirmed the application of a substrate-tuned approach in the preparation of new structural phases of 2D materials.
Article
Engineering, Electrical & Electronic
Rashmeet Kaur Khurana
Summary: This review discusses the research articles on moire acute accent patterns in nanomaterials over the past two decades, emphasizing the importance of understanding these patterns at the atomic level. It highlights how moire acute accent patterns can dominate the results of research in nanomaterials and provides insights for viewing them using electron microscopes.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Physical
Kangli Wang, Thomas Vincent, Jean Baptiste Bouhiron, Stephane Pons, Dimitri Roditchev, Sabina Simon, Mikhail Fonin, Beate Paulus, Yuriy Dedkov, Sergio Vlaic, Elena Voloshina
Summary: The interaction strength between graphene and substrate is strongly affected by the composition and nature of an alloy, leading to significant differences in the electronic structure of monolayer graphene on different Co-Ir alloys. This is supported by ARPES data showing the disappearance and restoration of the Dirac cone under different conditions.
Article
Physics, Multidisciplinary
Sina Mousavion, Ka Man Yu, Mahalingam Maniraj, Lu Lyu, Johannes Knippertz, Benjamin Stadtmueller, Martin Aeschlimann
Summary: This study examines the atomic and mesoscopic structural details of three different binary rare-earth-noble metals surface alloys. The research reveals different surface alloy structures, with DyAg2 surface alloy showing an inhomogeneous local structure. The findings demonstrate that surface alloying is an effective tool for tuning metallic heterostructures.
NEW JOURNAL OF PHYSICS
(2022)
Article
Chemistry, Physical
Stephan Appelfeller, Martin Franz, Murat Karadag, Milan Kubicki, Robert Zielinski, Maxim Krivenkov, Andrei Varykhalov, Alexei Preobrajenski, Mario Daehne
Summary: The terbium-induced nanostructures and their growth on Si(110) were comprehensively characterized using various techniques. It was found that a wetting layer formed at low terbium coverage, which gradually decreased with increasing coverage to give rise to unidirectional terbium silicide nanowires. These nanowires exhibited high aspect ratios at high annealing temperatures or on substrates containing terbium. The wetting layer and nanowires were both stable at temperatures up to 750 degrees C. In contrast to the nanowires, the wetting layer had a band gap, resulting in the semiconducting surrounding that insulated the nanowires.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Hicham Maradj, Nabil Rochdi, Benedicte Ealet, Sebastien Vizzini, Jean-Paul Biberian, Bernard Aufray, Haik Jamgotchian
Summary: Experimental investigations and observations have revealed a highly anisotropic structure of Zn on Ag(111) substrate at room temperature, forming finger-like inserted dendrites in front of Zn monolayer growth. Based on STM observations, mechanisms of inserted dendritic growth and its transition to layered growth are proposed.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Letizia Ferbel, Stefano Veronesi, Stefan Heun
Summary: In this study, rubidium adsorption and re-constructions on the Si(111)-(7 x 7) surface were investigated using STM and LEED. The effects of deposition temperature and Rb-coverage on the surface structures were observed. STM provided detailed information on the real space characterization of the Rb/Si(111)-(3 x 1) surface. These findings are important for understanding the behavior of rubidium on Si surfaces and have implications for applications in nanodevice fabrication.
Article
Computer Science, Information Systems
Nabilah Abughazalah, Majid Khan, Noor Munir, Ammar S. Alanazi, Iqtadar Hussain
Summary: Nowadays, digital transmission mechanisms are widely used in communications, making the security of digital information crucial. The advanced encryption standard (AES) is an extensively utilized encryption scheme with binary-based algorithms. This paper presents an innovative methodology for extending AES in a Galois field, enhancing its robustness and security.
CMC-COMPUTERS MATERIALS & CONTINUA
(2022)
Article
Multidisciplinary Sciences
Antoine Gros, Anais Guillem, Livio De Luca, Elise Baillieul, Benoit Duvocelle, Olivier Malavergne, Lise Leroux, Thierry Zimmer
Summary: This paper analyzes the collapsed transverse arch from the nave of Notre-Dame as a case study of reconstruction, using the digital twin framework. Four facets for the digital twin experiment are proposed, including physical anastylosis, reverse engineering, spatio-temporal tracking of assets, and operational research. The results demonstrate the effectiveness of the proposed modeling method in formalizing and validating the reconstruction problem.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
H. N. Fernandez-Escamilla, J. I. Paez-Ornelas, C. D. Gutierrez-Lazos, F. J. Solis-Pomar, J. Guerrero-Sanchez, E. G. Perez-Tijerina
Summary: This study comprehensively investigated the (001) BiOX surfaces by utilizing a comprehensive ab-initio approach. The stability of various surface terminations and defects were analyzed using first-principles thermodynamics. The results revealed that Bi-terminated BiOX (1 x 1) surfaces were the most stable under Bi-rich and O-rich conditions, while halogen-terminated BiOX (1 x 1) surfaces became stable under Bi-rich and O-poor conditions. Moreover, Bi and O vacancies on the BiOX (2 x 1) surfaces were found to stabilize the surface reconstructions. These findings are of great significance for the design and optimization of BiOX surface catalysts.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Masamichi Yamada, Kazuma Yagyu, Shinya Ohno, Takushi Iimori, Kan Nakatsuji, Fumio Komori
Summary: Nitrogen adsorption on a Cu(001) surface forms a grid-like nanopattern with square c(2 x 2) N-adsorbed islands of the size 5nm x 5nm aligned along [100] and [010] directions. Short bright lines running in [110] directions appear on patch edges only when the grid pattern approaches completion.
Article
Chemistry, Physical
Takayuki Suzuki, Kazuma Yagyu
Summary: We discovered that the 5 x 5 reconstruction on the Si(111)root 7 x root 3v -In surface is formed through indium deposition in a step-flow-like growth manner. This is different from the 7,7,8,8-tetracyanoquinodimethane (TCNQ) molecule deposition on the root 7v x root 3v -rect surface that was previously known. The 5 x 5 reconstruction is an incommensurate structure and the similar to 5.4 x similar to 5.4 surface is considered unstable at room temperature.
Review
Chemistry, Multidisciplinary
Weiran Zheng, Lawrence Yoon Suk Lee
Summary: Electrocatalysis is crucial for addressing environmental and energy problems, and understanding its processes is essential for designing electrocatalysts. Scanning tunneling microscopy (STM), which enables atomic-level surface imaging, is a valuable tool in electrocatalytic research.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Review
Chemistry, Applied
L. Gura, E. A. Soares, J. Paier, F. Stavale, H. -j. Freund
Summary: This paper discusses recent advances in surface science research on a silica film supported on a Ru(0001) substrate. The unique feature of this system is the binding of silica to the metal surface solely by dispersive forces, allowing for the study of reactions in the confined space between the metal substrate and the silica film, which acts as a permeable membrane. The research demonstrates that this system provides valuable insights into the complexity of reactions in confined spaces and allows for direct comparison with reactions occurring in open space.
TOPICS IN CATALYSIS
(2023)
Article
Materials Science, Multidisciplinary
Ping Zhang, Xiujie Yue, Yeran Gao, Zhenyong Lin, Shunxiang Wang, Songting Zhang
Summary: This paper investigates the strengthening mechanism of highspeed cutting and solid particle-entrained waterjet peening (HSC-WJP) composite reinforcement on 7075-T6 aluminum alloy. The research results show that composite reinforcement can improve surface quality, reduce surface pits and roughness, and decrease the size of precipitation-free zone (PFZ) at grain boundaries.
Article
Materials Science, Multidisciplinary
Sangyoon Lee, Hwi Yoon, Sanghun Lee, Seung-min Chung, Hyungjun Kim
Summary: The wettability of metal oxides, particularly HfO2 thin films deposited via atomic layer deposition, and its correlation with surface free energy have been studied. It was found that surface oxygen species significantly affect the intrinsic hydrophilicity of HfO2 thin films, and the crystalline orientations also evolve with film thickness.
Article
Materials Science, Multidisciplinary
Changdong Yin, Yiwen Wu, Zhou Xu, Dongdong Ye, Jun Yao, Jianjun Chen, Qiang Liu, Xin Ge, Meiling Ding
Summary: This study proposed a new strategy to indirectly estimate the hydrogen diffusivity of metallic materials under tensile stress by combining the electrochemical hydrogen permeation test (EHPT), the hydrogen diffusion descriptive equation based on Fick's law, and hydrogen pre-charged tensile test. The results showed that the hydrogen permeation curve obtained was highly approximate to the theoretical trend. The hydrogen embrittlement (HE) susceptibility of the specimens increased with increasing stress.
Article
Materials Science, Multidisciplinary
Huan Luo, Wei-yi Wang, Xin Yu, Xian-jun Lei, Lang Liu, Guo-zheng Zha, Wen-long Jiang, Bin Yang, Bao-qiang Xu
Summary: Separating selenium and tellurium is a general challenge in material and non-ferrous metallurgical industries. This paper proposes a novel method that achieved efficient separation of selenium and tellurium using gas-liquid equilibrium phase diagram and valence regulation-vacuum gasification technique.
Article
Materials Science, Multidisciplinary
Fan Zhang, Rong Xin Wang, Aiqin Tian, Fangzhi Li, Jianping Liu, Hui Yang
Summary: Deposition of Pd/Pt/Au three-layer films on p-GaN under high and ultra-high vacuum conditions was studied to investigate the electrical contact properties. Linear I-V curves were observed in samples deposited under ultra-high vacuum conditions, while nonlinear I-V characteristics were obtained in samples deposited under high vacuum conditions. The study also found that the samples deposited under high vacuum conditions had higher amounts of oxygen and Pd oxide. The oxide layer had an additional influence on the electrical characteristics of the Pd/Pt/Au/p-GaN contact.
Article
Materials Science, Multidisciplinary
Hongli Liu, Chengzhe Liu, Ying Sui, Zhongxian Liu, Tiangang Zhang, Zhiqiang Zhang, Shuang Sun, Jianwei Jia
Summary: This study utilized polysiloxane and hafnium carbide to produce Si-N-C-O-Hf hybridized ceramic fibers, and obtained ceramic fibers with hemispherical particles on the surface through electrostatic spinning and pyrolysis. The ceramic fibers exhibited excellent thermal stability, oxidation resistance, and high temperature insulation.
Article
Materials Science, Multidisciplinary
M. Abaker, Nazar Elamin Ahmed, A. Saad, H. F. Khalil, E. M. M. Ibrahim, A. M. Adam
Summary: This paper systematically studied the internal structure and thermoelectric properties of In1-xGaxSb alloys prepared by melting synthesis at 1123 K. The results showed that doping with Ga in the In sites led to a significant increase in the Seebeck coefficient and power factor, while reducing the thermal conductivity. The maximum dimensionless figure of merit was observed at 403 K.
Article
Materials Science, Multidisciplinary
Fucheng Yu, Jinlong Ren, Jielin Zhang, Haiyang Chen, Xin Tian, Chenchen Feng, Cuixia Li, Jianbin Zhang, Xianxi Tang, Xiaogang Hou
Summary: An environmentally friendly ZnO@BiVO4 composite photocatalyst was prepared using in-situ self-assembly and solvothermal methods, demonstrating good photocatalytic performance. The mass ratio of BiVO4 and NCZ was found to influence the photocatalytic performance of the composite.
Article
Materials Science, Multidisciplinary
Yaoming Shao, Pingping Zheng, Tianhao Dong, Lianghuan Wei, Haifei Wu, Jianxiao Si
Summary: In this paper, Mg3Bi2 films were prepared on glass substrate using magnetron sputtering, and the phase composition and thermoelectric properties of the films were investigated with different atomic ratios. The films displayed a metastable cubic phase and high conductivity when the atomic ratio exceeded stoichiometry.
Article
Materials Science, Multidisciplinary
I. V. Uimanov, D. L. Shmelev, S. A. Barengolts
Summary: A two-dimensional axisymmetric model has been developed to study the prebreakdown processes in a cathode microprotrusion under an external electric field. The simulation results show that electrohydrodynamic instability leads to the formation of a nanometer-sized conical protrusion on the microprotrusion tip, significantly accelerating the heating process.
Article
Materials Science, Multidisciplinary
Weilun Zhang, Di Yang, Feng Gong, Yongjun Chen, Tian Chen, Zhiwen Xie, Sirui Yang
Summary: A novel Pt doping method was designed to improve the thermal stability of CrWN coating. The doping of Pt atoms effectively blocks the coherent growth of the grains and creates a significant mixing effect, resulting in a smooth surface with uniform element distribution.
Article
Materials Science, Multidisciplinary
Xiaoye Wang, Xiaoguang Yang, Wenna Du, Tao Yang
Summary: In this study, the effects of multiple growth parameters on self-catalyzed growth of InAs/GaSb axial heterostructured nanowires on Si substrate by MOCVD were investigated. It was found that the growth temperature and switching time have significant influences on the nanowire growth.
Article
Materials Science, Multidisciplinary
Weizhong Cui, Yan Zhao, Can Cui, Xing Liu, Beili Pang, Jianguang Feng, Hongzhou Dong, Liyan Yu, Lifeng Dong
Summary: This study introduces Co2+ cations into Cs2AgBiBr6 film to improve its quality, grain size, and conductivity, resulting in enhanced solar cell efficiency.
Article
Materials Science, Multidisciplinary
Jian Wang, Ke Yang, Xianming Cheng, Yalin Lu, Ganghui Wu, Yang Zhang, Yun Kan
Summary: The corrosion behavior and microstructural evolution of Sc microalloyed Al-3.2Cu-1.5Li alloys were investigated in detail. The microstructural results showed higher levels of dislocations density in the Sc microalloyed sample, which resulted in significantly refined grains and T1 precipitates. Microalloying with Sc changed the corrosion mode of the alloy and localized corrosion was found to occur preferentially at the subgrain within unrecrystallized grains with high grain stored energy.
Article
Materials Science, Multidisciplinary
Weifeng Liu, Na Liu, Kaiqiang Song, Meiqin Zeng, Zhongchen Lu
Summary: Monoclinic WO3 prepared through plasma milling exhibits higher photocatalytic activity due to its higher surface area, increased oxygen vacancies, and defects.