Article
Chemistry, Physical
T. I. Milenov, I. A. Avramova, A. Dikovska, D. Karaivanova, P. Terziyska, S. K. Kolev, D. Karashanova, B. Georgieva, D. Dimov, V. Atanasov, E. P. Valcheva
Summary: The study found that UV-C irradiation had a significant impact on the structural quality of a-C:H and ta-C:H films, reducing the content of sp(3) and oxygen-containing radicals. The influence of UV-C light directed almost parallel to the films' surface on the structural quality of graphene-like films was slightly higher than that directed perpendicular.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Youngbin Tchoe, Janghyun Jo, HoSung Kim, Heehun Kim, Hyeonjun Baek, Keundong Lee, Dongha Yoo, Won Jun Choi, Miyoung Kim, Gyu-Chul Yi
Summary: This study demonstrates the monolithic integration of InAs nanorods and ZnO nanotubes using a multilayer graphene film as the substrate, leading to the fabrication of dual-wavelength photodetectors. The hybrid nanostructures, grown by metal-organic vapor-phase epitaxy and molecular beam epitaxy, show sensitivity to both ultraviolet and mid-infrared wavelengths, as verified by transmission electron microscopy, spectral photoresponse analysis, and current-voltage measurements.
NPG ASIA MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Oleg Dubov, Jaume Giralt Marce, Agusti Fortuny, Azael Fabregat, Frank Stuber, Josep Font
Summary: Uniform flexible carbon nitride coatings were synthesized by annealing soluble triazine-based polymeric precursors, exhibiting outstanding electrochemical stability and increased capacitance. The coatings, composed of nearly equal atomic quantities of carbon and nitrogen, showed noticeable mechanical strength and optical bandgaps ranging from 1.71 to 1.99 eV, with good conductivity.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Aileen Sauermoser, Thomas Lainer, Andreas Knoechl, Freskida Goni, Roland C. Fischer, Harald Fitzek, Martina Dienstleder, Christine Prietl, Anne-Marie Kelterer, Christine Bandl, Georg Jakopic, Gerald Kothleitner, Michael Haas
Summary: The aim of this study was to prepare amorphous silicon-carbon hybrid thin-layer materials using liquid phase deposition (LPD) process and single-source precursors. Different precursor materials were used, and the carbon content and bandgap of the thin films were successfully controlled. The results show the potential of LPD for tuning the properties of silicon-carbon materials.
INORGANIC CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Fang Ren, Bingyao Liu, Zhaolong Chen, Yue Yin, Jingyu Sun, Shuo Zhang, Bei Jiang, Bingzhi Liu, Zhetong Liu, Jianwei Wang, Meng Liang, Guodong Yuan, Jianchang Yan, Tongbo Wei, Xiaoyan Yi, Junxi Wang, Yong Zhang, Jinmin Li, Peng Gao, Zhongfan Liu, Zhiqiang Liu
Summary: A novel nanorod-assisted van der Waals epitaxy method has been developed, allowing for the growth of nearly single-crystalline GaN films on amorphous silica glass substrates. This approach enables the growth and lifting off of GaN-based light-emitting diodes with record internal quantum efficiency, and offers the potential for high-quality growth of nitrides on arbitrary substrates.
Article
Nanoscience & Nanotechnology
Kun Xu, Pei Ding, Yan Li, Leiming Chen, Junwei Xu, Xiangyang Duan, Fanguang Zeng
Summary: High-quality graphene film was successfully prepared through magnetron sputtering and chemical vapor deposition, demonstrating the conversion from amorphous carbon to monolayer graphene. This technique is characterized by its simplicity and wider processing window, and the produced graphene film exhibits excellent crystallinity and conductivity.
SCIENCE OF ADVANCED MATERIALS
(2021)
Review
Nanoscience & Nanotechnology
Wei Zheng, Xin Zhao, Wenjie Fu
Summary: Vertical graphene (VG) is a thin-film complex material with hierarchical microstructures, offering excellent electrical and thermal conductivity, chemical stability, and large specific surface area. VG materials have been successfully applied in various niche applications, with their microstructure tunable through different growth methods and processes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Ik-Soo Kim, Chae-Eun Shim, Sang Won Kim, Chang-Seok Lee, Junyoung Kwon, Kyung-Eun Byun, Unyong Jeong
Summary: Although relatively less attention has been given to amorphous carbon (a-C) thin films, research on their structures and properties has accumulated. Currently, a-C thin films are being used as hardmasks in the semiconductor industry and hold promise for practical applications in other areas as well.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Cheong-Ha Kim, Yu-Sung Kim, Jin-Young Choi, In-Sik Lee, Byung-Chul Cha, Dae-Wook Kim, Jewon Lee
Summary: Electrochromic technologies have gained attention for their energy-saving performance. This study electrodeposited nanostructured tungsten trioxide films to enhance their electrochromic properties by controlling the pH of electrolytes. Electron microscopy and spectroelectrochemical analysis showed that smaller grain sizes resulted in larger electrochemical reactive surface areas and shorter ion diffusion lengths, achieving efficient ion intercalation and deintercalation.
Article
Materials Science, Multidisciplinary
Anfeng Zhang, Li Wang, Zhenyu Wang, Rende Chen, Xiaoping Li, Yuanbing Wang, Aiying Wang
Summary: By depositing a 1 nm thin Al2O3 barrier on an amorphous-C/Ni bilayer stack, few-layer graphene (FLG) was successfully synthesized directly on the substrate surface at 700°C and 800°C. The obtained graphene exhibited a high transmittance (93%) under a light source of 550 nm. These findings offer a new method to synthesize FLG on the required substrate at low temperatures, which could significantly expand the application range of graphene.
Article
Ecology
Anna J. Mueller, Anne Daebeler, Craig W. Herbold, Rasmus H. Kirkegaard, Holger Daims
Summary: Nitrospirales, including the genus Nitrospira, are widespread bacteria that play important roles in nitrogen and carbon cycling. In this study, three new marine Nitrospirales species and one novel genus were discovered. A new organism, named Ca. Nitronereus thalassa, represents the first cultured member of a Nitrospirales lineage that includes both free-living and sponge-associated nitrite oxidizers. This organism exhibits distinct habitat distribution patterns and unique genes involved in carbon fixation and respiration.
Article
Materials Science, Multidisciplinary
Youngsuk Kim, Nina Baule, Maheshwar Shrestha, Qi Hua Fan
Summary: A single-beam plasma source was used to deposit transparent and durable hydrogenated amorphous carbon coatings at room temperature, with high transmittance and high durability, suitable for many applications.
Article
Chemistry, Physical
Bo Xu, Shichen Xu, Yan Zhao, Shishu Zhang, Rui Feng, Jin Zhang, Lianming Tong
Summary: A Raman spectroscopic technique is reported for characterizing the oblique angle of vertical graphene arrays, showing quantitative measurement with an error of less than 5 degrees. The technique is simpler and more reliable than conventional linearly polarized Raman spectroscopy, and in combination, can be used for characterizing the spatial orientation of materials in more complex systems.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Fengshi Li, Hewei Zhao, Xiaoyi Sun, Yonghai Yue, Zhongchang Wang, Lin Guo
Summary: In this study, a super-strong and flexible fiber was successfully prepared by introducing a crystalline GO and amorphous ZrO2 superstructure, which is analogous to a naturally ordered microstructure in nacre. The fiber showed excellent combination of high strength and toughness. The findings demonstrate that the crystalline-amorphous dual-phase strategy can serve as an economical and environment-friendly method to prepare GO-based fibers with high performance.
Article
Chemistry, Multidisciplinary
Junkui Zhu, Honglie Shen, Zehui Wang, Yufang Li, Tianru Wu, Weibiao Mao, Jingzhe Zhang
Summary: In this work, high-quality vertical graphene nanowalls (VGN) were successfully prepared without catalysts through hot-wire chemical vapor deposition. The VGN exhibited low defect density, few layers, and submicron domain size. The prepared VGN showed excellent electrical properties and high output power in dropping-ion-droplet nano-power generation devices.
Article
Materials Science, Multidisciplinary
Rathinavelu Sokkalingam, Zhao Chao, Katakam Sivaprasad, Veerappan Muthupandi, Jayamani Jayaraj, Parthiban Ramasamy, Juergen Eckert, Konda Gokuldoss Prashanth
Summary: CoCrFeMnNi high-entropy alloy/AISI 316L stainless steel bimetal was fabricated using SLM, showing enhanced hardness and tensile strength due to the composition and structure advantages. However, the presence of defects and higher susceptibility to pitting corrosion in CoCrFeMnNi-HEA make it more prone to corrosion attack in corrosive environments.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sabine C. Bodner, Kostyantin Hlushko, Kevin Kutlesa, Juraj Todt, Oliver Renk, Michael Meindlhumer, Florian Resch, Marc-Andre Nielsen, Jozef Keckes, Jurgen Eckert
Summary: The correlations between process conditions, microstructure, and mechanical properties of additively manufactured components are explored in this study. The results show that the applied hatch strategy has a significant impact on the microstructure and mechanical properties of the samples, especially the anisotropy observed in the plane perpendicular to the build direction.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sepide Hadibeik, Florian Spieckermann, Martin Nosko, Farzad Khodabakhshi, Mahmoud Heydarzadeh Sohi, Juergen Eckert
Summary: A novel approach for fabricating bulk metallic glass using additive manufacturing has been studied, however, there are challenges, such as unmelted powder and compositional deviation, that need further investigation to optimize the process parameters.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jelena Petrusa, Benjamin Meier, Gerda Gruenbacher, Wolfgang Waldhauser, Juergen Eckert
Summary: The effects of laser energy density on the relative density and microstructure of cp-TiGd2 fabricated by LB-PBF were studied, and the influence of printing orientation and different surface treatments on surface topography and biocompatibility were investigated. The aim is to develop additive manufacturing process parameters that can achieve full density and satisfactory biocompatibility for cp-TiGd2 as a low-cost alternative to biomedical materials. An optimized process with high density, improved surface roughness, and noncytotoxicity was achieved using a wide range of process parameters.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Physical
K. Chen, C. Luo, Y. Zhao, F. Baudelet, A. Maurya, A. Thamizhavel, U. K. Roessler, D. Makarov, F. Radu
Summary: In rare-earth compounds, the proximity of the 4f level to the Fermi energy leads to instabilities of the charge configuration and the magnetic moment. We provide experimental evidence for induced magnetic polarization of the Eu3+ atomic shell due to interactions with the Eu2+ atomic shell. Applying external pressure leads to a transition from antiferromagnetic to fluctuating behavior in EuNiGe3 single crystals, with observed magnetic polarization for both Eu2+ and Eu3+ valence states.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Keziban Huner, Baran Sarac, Eray Yuece, Amir Rezvan, Matej Micusik, Maria Omastova, Juergen Eckert, A. Sezai Sarac
Summary: The incorporation of iron and carboxylic acid-functionalized polyaniline into polymeric polycaprolactone structures enhances the electron-donating ability and conductivity of the compound, making it suitable for electrochemical immunosensors.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
Article
Engineering, Mechanical
Bin Chen, Yunli Li, Daniel Sopu, Juergen Eckert, Wenping Wu
Summary: The shock-induced dynamic mechanical behavior and spallation failure of Ni-based single crystal superalloys are studied using non-equilibrium molecular dynamic simulations. Two modes of classical spallation and micro-spallation are observed during the spallation failure. The deformation mechanism is dominated by slip and drag of dislocations at low shock velocities, while complex phase transitions from FCC to BCC or disordered structures occur at higher velocities, leading to a decrease in spallation strength. The presence of voids significantly lowers the spallation strength, and the reduction in strength is proportional to the radius of the voids.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Xiaoming Liu, Zongde Kou, Ruitao Qu, Weidong Song, Yijia Gu, Changshan Zhou, Qingwei Gao, Jiyao Zhang, Chongde Cao, Kaikai Song, Vladislav Zadorozhnyy, Zequn Zhang, Juergen Eckert
Summary: This study utilizes high-temperature extrusion and annealing to optimize the microstructures and mechanical properties of the Co34Cr32Ni27Al3.5Ti3.5 multicomponent alloy. Hot extrusion reduces grain sizes and promotes the precipitation of nanoparticles inside the FCC matrix and grain boundaries. Subsequent annealing regulates the microstructures and enhances the mechanical properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ming-Wei Wu, Kai Ni, Yang Lei, Xin-Xing Xiong, Yi-Ting Chuang, Quiao-En Lin, Pei Wang, Parthiban Ramasamy, Juergen Eckert
Summary: Selective laser melting (SLM) was utilized to produce CuZrAl metallic glass (MG) scaffolds with combined lattice structures of body-centered cubic and face-centered cubic (F2BCC), and the effects of lattice structures on mechanical behavior were investigated. The results revealed that curved struts remarkably enhanced compressive ductility by 122% and energy absorption by 106%. The presence of curved struts effectively prevented catastrophic shear fracture and delayed fracture occurrence due to the release of strain concentrations. This study demonstrates the potential of improving the ductility and toughness of SLM MG components through appropriate lattice structure design.
Article
Chemistry, Multidisciplinary
Michiel Richter, Jakub Sikorski, Pavlo Makushko, Yevhen Zabila, Venkatasubramanian Kalpathy Venkiteswaran, Denys Makarov, Sarthak Misra
Summary: Advances in magnetoresponsive composites and (electro-)magnetic actuators have led to development of magnetic soft machines (MSMs) as building blocks for small-scale robotic devices. Near-field MSMs offer energy efficiency and compactness by bringing the field source and effectors in close proximity. However, current challenges of near-field MSM include limited programmability of effector motion, dimensionality, ability to perform collaborative tasks, and structural flexibility.
Review
Chemistry, Multidisciplinary
Yiran Ding, Chenyang Wang, Mengqi Zeng, Lei Fu
Summary: Atomic manufacturing is a guideline for precisely synthesizing materials, customizing their properties, and applying them to advanced applications in demand. It has the ability to visualize substances at the atomic level, manipulate atoms atom by atom, induce and promote chemical reactions, and ultimately obtain products with specific atomic structures.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Sebastian Lamb-Camarena, Fabrizio Porrati, Alexander Kuprava, Qi Wang, Michal Urbanek, Sven Barth, Denys Makarov, Michael Huth, Oleksandr V. Dobrovolskiy
Summary: Magnonics is a rapidly developing field in nanomagnetism, with potential applications in information processing systems. This study demonstrates the fabrication of 3D magnonic nanoconduits using the focused-electron-beam induced deposition (FEBID) technique. The researchers use Brillouin light scattering (BLS) spectroscopy to compare the spin-wave resonances of 2D and 3D nanostructures, revealing significant qualitative differences due to the non-uniformity of the internal magnetic field. This work highlights the additive manufacturing capability of FEBID for magnetic 3D nanoarchitectures and presents the first characterization of FEBID conduits using BLS spectroscopy.
Article
Chemistry, Physical
Baran Sarac, Remzi Gurbuz, Matej Micusik, Maria Omastova, Amir Rezvan, Eray Yuece, Lixia Xi, Juergen Eckert, Ali Ozcan, A. Sezai Sarac
Summary: This study focuses on the synthesis and properties comparison of a novel organic composite nanofiber material consisting of styrene-butadiene-styrene (SBS) copolymer blended with polystyrene (PStyr) and carbon nanotubes (CNTs). The addition of CNTs retards the crystallization process and decreases the absorbance of both SBS/PStyr and PStyr/PBu in Fourier transform infrared spectroscopy. The interaction of CNTs with the blend is limited in samples with SBS, as observed in Raman spectroscopy.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Yabei Xia, Linyang Li, Haihui Lan, Yuxin Ma, Feifei Cao, Yu Ding, Luyang Wang, Xiaofei Zhu, Mengqi Zeng, Lei Fu
Summary: Multicolor luminescence is a promising field for future optoelectronic devices with various applications. Achieving multicolor luminescence in two-dimensional materials has been challenging due to their atomic thickness and structural sensitivity. However, researchers have now successfully designed a 2D inorganic framework that allows for nondestructive embedding of self-transforming luminescence centers, resulting in multicolor emissions ranging from green to orange. This breakthrough provides new opportunities for designing 2D multicolor luminescent materials and expanding their applications.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yuanhao Shen, Juan Zou, Mengqi Zeng, Lei Fu
Summary: This Perspective provides a comprehensive understanding of atomic manufacturing in electrode materials, highlighting its importance and how it enhances the performance of electrode materials. It also discusses the future prospects of materials and fabrication methods for atomic manufacturing.