Article
Materials Science, Multidisciplinary
James E. Nathaniel, Gregory A. Vetterick, Osman El-Atwani, Asher Leff, Jon Kevin Baldwin, Pete Baldo, Marquis A. Kirk, Khalid Hattar, Mitra L. Taheri
Summary: This study provides experimental evidence that grain size and irradiation induced defect morphology are not directly correlated, and the addition of solute can alter the final damage state.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Coatings & Films
Thomas R. Koenig, Zhaoxia Rao, Eric Chason, Garritt J. Tucker, Gregory B. Thompson
Summary: The study investigates the stress and microstructural evolution of Ni thin films under various sputtering conditions. A kinetic model is used to understand the factors contributing to the intrinsic stress development and their relationship with microstructure. It was found that bimodal grain size distribution in films deposited at the lowest pressure deviated from the model's predictions, impacting the overall fit of the model to experimental data.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Matthew J. Patrick, Gregory S. Rohrer, Ooraphan Chirayutthanasak, Sutatch Ratanaphan, Eric R. Homer, Gus L. W. Hart, Yekaterina Epshteyn, Katayun Barmak
Summary: Grain boundary character distributions (GBCD) can be measured from microcrystalline samples using electron backscatter diffraction (EBSD) and can be used to reconstruct relative grain boundary energy distributions (GBED) based on the 3D geometry of triple lines, assuming the force balance condition is satisfied. However, for nanocrystalline thin films, the GBED cannot be extracted effectively using orientation mapping via precession enhanced electron diffraction (PED). In this study, the relative energy extraction technique was adapted to PED data and the results showed that the GBED extracted from these films do not correlate with energies calculated using molecular dynamics (MD) or with the experimentally determined GBCD. This suggests that additional geometric factors contribute to determining the triple junction geometry and boundary network structure in these films.
Article
Materials Science, Multidisciplinary
Niklas Wolff, Philipp Jordt, Justin Jetter, Henning Vogt, Andriy Lotnyk, Klaus Seemann, Sven Ulrich, Eckhard Quandt, Bridget M. Murphy, Lorenz Kienle
Summary: Composites of ultra-thin nanolayers of FeCo/TiN exhibit stability at high temperatures and defined magnetic properties that can be tuned by adjusting layer thickness. Using aberration-corrected microscopes and X-ray diffraction analysis, the nanostructure was found to consist of individual layers of FeCo and TiN forming a superlattice with a specific orientation relationship. Simulation of electron diffraction patterns confirmed a defined orientation relationship leading to the stabilization of tetragonal FeCo unit cells at the nanoscale.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Coatings & Films
Yi-En Ke, Li-Chun Chang, Wu Kai, Yung- Chen
Summary: The study found that the Ta-Al multilayer films exhibited low oxygen content and high hardness at high temperatures, although the high Ta content in the films decreased their adhesion to the substrates. By preparing laminated films, the adhesion between the film and the substrate can be improved.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Tomasz Wojcik, Vincent Ott, Sedat Oezbilen, Harald Leiste, Sven Ulrich, Paul Heinz Mayrhofer, Helmut Riedl, Michael Stueber
Summary: Transition metal diboride-based thin films have attracted strong interest in both fundamental and applied research. This study investigated the constitution and microstructure of multilayer thin films composed of TiBx and NiAl, and found that the nature of the interfaces has an impact on dislocation density and the ability to form dislocations in these multilayer structures.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Materials Science, Multidisciplinary
Ankit Singh, Maurya Sandeep Pradeepkumar, Deepak Kumar Jarwal, Satyabrata Jit, Sandip Bysakh, Md Imteyaz Ahmad, Joysurya Basu, R. K. Mandal
Summary: The atomic arrangements and structures of thermally evaporated Au/Cu multilayer thin films on polycrystalline Si substrate have been explored, revealing that the Cu layer is amorphous and the Au layer is polycrystalline with columnar structure. Localized amorphous phase forms at the Cu-Si interface, while interfaces of Au-Cu are wavy and Cu-Au interface shows diffusionally grown ordered phases.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Tapati Jana, Romyani Goswami
Summary: Undoped hydrogenated silicon oxide thin films were prepared using RF PECVD method, and the impact of carbon dioxide dilution on their optoelectronic and structural properties was thoroughly studied. The films were analyzed for surface morphology using various microscopy techniques, revealing the presence of uniformly embedded silicon nanocrystallites. FTIR spectra showed an initial increase followed by a decrease in oxygen content with increasing carbon dioxide dilution, with films having lower oxygen content exhibiting stronger PL peaks.
Article
Materials Science, Multidisciplinary
Jiwon Jeong, Woo-Sung Jang, Kwang Hun Kim, Aleksander Kostka, Gilho Gu, Young-Min Kim, Sang Ho Oh
Summary: This study evaluates two advanced, automated crystal orientation mapping techniques suitable for nanocrystalline materials. The comparison shows that TEM-PED is more reliable for characterizing grains oriented along low-index zone axes, while SEM-TKD is better at detecting small misorientation between grains, providing better quantification and statistical analysis of grain orientation. Both techniques are complementary tools for nanocrystalline materials and can be selected based on analysis requirements, as they have competitive performance in terms of angular resolution and texture quantification.
MICROSCOPY AND MICROANALYSIS
(2021)
Article
Materials Science, Multidisciplinary
C. N. Shyam Kumar, Clemens Possel, Simone Dehm, Venkata Sai Kiran Chakravadhanula, Di Wang, Wolfgang Wenzel, Ralph Krupke, Christian Kuebel
Summary: Polymer pyrolysis is a versatile method to synthesize graphenoid materials with varying thickness and properties. The thickness of the thin film greatly affects the graphitizability and properties of the material. In situ current annealing inside a TEM reveals that thin samples form large graphene layers parallel to the substrate, while thick samples form multi-walled cage-like structures. MD simulations show that carbonized layers align parallel to the surface for films with a thickness below 40 angstrom, and become increasingly misoriented for thicker samples.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Chemistry, Physical
Yohei Nomura, Jun Uzuhashi, Tatsuya Tomita, Toru Takahashi, Hidenori Kuwata, Taichi Abe, Tadakatsu Ohkubo, Kazuhiro Hono
Summary: The nanocrystalline structure and soft magnetic properties of melt-spun Fe-B-P-Cu ribbons are greatly influenced by the heating rates during crystallization of amorphous precursors. Higher heating rates lead to larger size and higher Cu concentration of the Cu clusters in both P-rich and B-rich ribbons. Solute partitioning behaviors between alpha-Fe and residual amorphous phase are consistent with the Fe-P-B ternary phase diagram, with P segregating at the amorphous/alpha-Fe interface during crystallization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Alexander Vogel, Alicia Ruiz Caridad, Johanna Nordlander, Martin F. Sarott, Quintin N. Meier, Rolf Erni, Nicola A. Spaldin, Morgan Trassin, Marta D. Rossell
Summary: Recent studies have found that oxygen defects on the surface of improper ferroelectric thin films can result in the loss of ferroelectric response. We investigated hexagonal YMnO3 thin films and discovered that the polarization suppression in thinner films is due to oxygen vacancies. We demonstrated that these vacancies form on the film surfaces to screen the large internal electric field. Furthermore, by modifying the oxygen concentration, we can significantly tune the phase transition temperatures. These findings are expected to be applicable to other ferroelectric oxide films, highlighting the importance of controlling oxygen content and cation oxidation states for successful integration in nanoscale applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Beibei Qiao, Yixiao Jiang, Tingting Yao, Ang Tao, Xuexi Yan, Chunyang Gao, Xiang Li, Hiromichi Ohta, Chunlin Chen, Xiu-Liang Ma, Hengqiang Ye
Summary: In this study, high-quality La2Ti2O7 thin films were prepared on (110) SrTiO3 substrates. The thin films were found to have good crystallinity and a stepped and terraced surface structure after annealing. The La2Ti2O7 thin films were of high purity and only contained Ti4+ ions. The band gap of the La2Ti2O7 film was measured to be -3.2 eV. The atomic and electronic structures of the La2Ti2O7/SrTiO3 heterointerface were studied, revealing that the interface was atomically abrupt and coherent. The heterointerface contributed to the decrease of the band gap near the interface and the reduction of spontaneous polarization in La2Ti2O7 was localized in two layers of TiO6 octahedra near the interface.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Zhong Zheng, Hong Zhao, Lixian Sun, Yanping Liu, Li Fu, Marcela M. Bilek, Behnam Akhavan, Zongwen Liu
Summary: The thermal stability of AlCrFeCoNiCu0.5 high entropy alloy thin film was investigated in this study, and some unusual phenomena were observed during annealing process, indicating that the thermal stability of high entropy alloy is not always excellent. Heat recovery and recrystallization were achieved after annealing, causing changes in the hardness and elastic modulus of the thin films.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Sandra Stangebye, Xing Liu, Lina Daza Llanos, Yichen Yang, Ting Zhu, Josh Kacher, Olivier Pierron
Summary: A novel in situ transmission electron microscopy (TEM) microelectromechanical system (MEMS) device has been developed for measuring stress, strain and microstructure evolution of thin film micro-specimens. The device outperforms a similar MEMS device using capacitive sensors, showing reduced noise levels and increased sensitivity for small stress changes.
Article
Engineering, Industrial
Aman Haque, John Sherbondy, Daudi Warywoba, Paul Hsu, Sukesh Roy
Summary: A new residual stress mitigation technique involving low-frequency DC current pulses is able to reduce residual stress in less than a minute near ambient temperature, as demonstrated on a welded joint of 316 L stainless steel. Experimental evidence showed significant reduction in electrical resistance, microhardness, and residual stress.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Md Abu Jafar Rasel, Sergei Stepanoff, Aman Haque, Douglas E. Wolfe, Fan Ren, Stephen Pearton
Summary: This study introduces a non-thermal annealing technique that uses high current density pulses to target and mobilize defects in electronic devices. Experimental results show that this technique can partially recover the irradiation-induced damage and restore the characteristics of the devices under certain temperature conditions. In comparison to traditional thermal annealing, this technique performs better.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Sergei P. Stepanoff, Abu Jafar Rasel, Aman Haque, Douglas E. Wolfe, Fan Ren, Stephen J. Pearton
Summary: This study introduces a new heuristic approach to identify the most vulnerable regions to radiation exposure by exploiting mechanical and thermal properties of devices, significantly reducing analysis time and improving the accuracy and efficiency of radiation sensitivity identification.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Physics, Applied
Darren C. C. Pagan, Md A. J. Rasel, Rachel E. E. Lim, Dina Sheyfer, Wenjun Liu, Aman Haque
Summary: Localized residual stress and elastic strain concentrations in microelectronic devices have significant impacts on electronic performance, thermomechanical damage resistance, and radiation tolerance. This study demonstrates the use of synchrotron x-ray-based differential aperture x-ray microscopy (DAXM) to characterize these stress and strain concentrations in a non-destructive manner. The results show that gamma-irradiation significantly reduces the lattice plane spacing in GaN.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Coatings & Films
Xinyi Xia, Nahid Sultan Al-Mamun, Daudi Warywoba, Fan Ren, Aman Haque, S. J. Pearton
Summary: Ion milling of lightly Si-doped, n-type Ga2O3 was conducted with varying beam voltages and currents, with subsequent evaluation of the effects on electrical properties and structural damage. The electrical effects of ion damage were characterized, and subsequent annealing showed recovery of the electrical properties.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Materials Science, Multidisciplinary
Xinyi Xia, Jian-Sian Li, Ribhu Sharma, Fan Ren, Md Abu Jafar Rasel, Sergei Stepanoff, Nahid Al-Mamun, Aman Haque, Douglas E. Wolfe, Sushrut Modak, Leonid Chernyak, Mark E. Law, Ani Khachatrian, S. J. Pearton
Summary: This paper presents a review of experimental and simulation radiation damage results in Ga2O3. Ga2O3 is expected to have similar radiation resistance as GaN and SiC, but with orders of magnitude difference compared to GaAs. The study highlights the importance of examining all types of radiation, as Ga2O3 devices may be used in both space and terrestrial applications.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Physics, Applied
Nahid Sultan Al-Mamun, Sergei Stepanoff, Aman Haque, Douglas E. E. Wolfe, Fan Ren, Stephen Pearton
Summary: Strain localization in microelectronic devices can be relieved by milling micro-trenches, which minimizes radiation damage.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Jian-Sian Li, Chao-Ching Chiang, Xinyi Xia, Sergei Stepanoff, Aman Haque, Douglas E. Wolfe, Fan Ren, S. J. Pearton
Summary: NiO/Ga2O3 heterojunction rectifiers were irradiated with 1 Mrad of Co-60 gamma-rays, resulting in a 1000x reduction in forward current, a 100x increase in reverse current, and a significant decrease in the on-off ratio. The carrier concentration in the Ga2O3 drift region slightly decreased, indicating a reversible effect. The rectifiers showed no permanent ionizing dose effects and resistance to displacement damage, suggesting potential applications in harsh radiation environments with appropriate bias sequences.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Coatings & Films
Sushrut Modak, James Spencer Lundh, Nahid Sultan Al-Mamun, Leonid Chernyak, Aman Haque, Thieu Quang Tu, Akito Kuramata, Marko J. Tadjer, Stephen J. Pearton
Summary: This paper investigates the growth of Halide vapor phase epitaxial (HVPE) Ga2O3 films on c-plane sapphire and diamond substrates without using a barrier dielectric layer to protect the diamond surface. The results show the growth of alpha-Ga2O3 on sapphire and the presence of nanocrystalline beta-Ga2O3 regions in films grown on diamond. The films were characterized using Raman spectroscopy and transmission electron microscopy.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Nanoscience & Nanotechnology
Nahid Sultan Al-Mamun, Douglas E. Wolfe, Aman Haque, Jae-Gyun Yim, Seong Keun Kim
Summary: A room temperature annealing method using electron impulse force is demonstrated to significantly improve the crystallinity and reduce the resistivity of tin disulfide, which is important for post-synthesis annealing applications that require high temperature and special environments.
SCRIPTA MATERIALIA
(2023)
Article
Engineering, Electrical & Electronic
Md Abu Jafar Rasel, Sergei Stepanoff, Aman Haque, Douglas E. Wolfe, Fan Ren, Stephen J. Pearton
Summary: This study investigates the effects of gamma radiation on GaN high electron mobility transistors (HEMTs) and finds that biasing state and pre-existing damage significantly influence device performance. Results show that the threshold voltage, transconductance, and leakage current exhibit distinct trends during irradiation, and the ON-state operation demonstrates superior radiation hardness compared to the OFF-state and prestressed devices.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2022)
Article
Materials Science, Multidisciplinary
Gongyuan Liu, Yichun Tang, Khalid Hattar, Yuzhou Wang, William Windes, Aman Haque, Jing Du
Summary: This study aims to establish an experimental method to investigate pre-existing defects and 3-D crack growth inside nuclear graphite. Three-point bending tests were performed on specimens with and without micro-CT. The results highlight the capability of laboratory micro-CT-based experimental method for the visualization of multi-scale defect interactions, which remains to be a challenge in the characterization of nuclear graphite.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Logan C. Sharp, Nahid Sultan Al-Mamun, Maxwell Wetherington, Aman Haque
Summary: MXenes are layered carbides and nitrides of transition metals with potential applications in micro-devices for energy storage, conversion, and transport. Thicker MXene films for micro-devices exhibit high density of microscale pores and lower electrical conductivity compared to nanosheets. This study proposes a room-temperature annealing process using electrical pulses and compressive mechanical loading, resulting in a significant increase in electrical conductivity and a decrease in void size and density. The proposed multi-stimuli process maintains the MXene composition while improving its properties.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Douglas E. Wolfe, Christopher M. DeSalle, Caillin J. Ryan, Robert E. Slapikas, Ryan T. Sweny, Ryan J. Crealese, Petr A. Kolonin, Sergei P. Stepanoff, Aman Haque, Simon Divilov, Hagen Eckert, Corey Oses, Marco Esters, Donald W. Brenner, William G. Fahrenholtz, Jon-Paul Maria, Cormac Toher, Eva Zurek, Stefano Curtarolo
Summary: Titanium carbonitride (TiCN) is an advanced and commercially important hard ceramic material that has recently been successfully fabricated into bulk ceramics using FAST. This study aims to evaluate the relationships between structure, processing, properties, and performance of binderless TiCN ceramics, particularly in regard to indentation hardness across different loads and deformation length scales. Through micro-/nanoindentation, valuable insights into the load-dependent hardness distributions, sensitivity to elasto-plastic parameters, and multiscale parameterization were obtained. These findings provide a critical understanding of the interplay between compositional/microstructural evolution and FAST processing parameters for next-generation hard ceramics.
Proceedings Paper
Computer Science, Theory & Methods
Xinyi Xia, Minghan Xian, Jian-Sian Li, Fan Ren, Jinho Bae, Jihyun Kim, Md Abu Jafar Rasel, Aman Haque, Stephen J. Pearton
Summary: The dc characteristics of quasi 2-dimensional Ga2O3 nanolayer field effect transistors were investigated at temperatures up to approximately 327 degrees C. The (100) plane beta-Ga2O3 flake was obtained by mechanically exfoliating from the side wall of the (-201) plane beta-Ga2O3 bulk substrate and transferred onto a SiO2/Si substrate. The excellent high temperature transistor performance and air stability of quasi-2D beta-Ga2O3 make them suitable candidates for high voltage nano electronics.
Article
Nanoscience & Nanotechnology
Jie Zhang, Xiaoyang Chen, MingJian Ding, Jiaqiang Chen, Ping Yu
Summary: This study enhances the compositional inhomogeneity of relaxor ferroelectric thin films to improve their dielectric temperature stability. The prepared films exhibit a relatively high dielectric constant and a very low variation ratio of dielectric constant over a wide temperature range.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xiaoyu Chen, Ranran Zhang, Hao Zou, Ling Li, Qiancheng Zhu, Wenming Zhang
Summary: Polyaniline-manganese dioxide composites exhibit high conductivity, long discharge platform, and stable circulation, and the specific capacity is increased by providing additional H+ ions to participate in the reaction.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xutao Huang, Yinping Chen, Jianjun Wang, Gang Lu, Wenxin Wang, Zan Yao, Sixin Zhao, Yujie Liu, Qian Li
Summary: This study aims to establish a novel approach to better understand and predict the behavior of materials with multi-scale lamellar microstructures. High-resolution reconstruction and collaborative characterization methods are used to accurately represent the microstructure. The mechanical properties of pearlite are investigated using crystal plasticity simulation and in-situ scanning electron microscopy tensile testing. The results validate the reliability of the novel strategy.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Cheng Chen, Fanchao Meng, Jun Song
Summary: This study systematically investigated the unfaulting mechanism of single-layer interstitial dislocation loops in irradiated L12-Ni3Al. The unfaulting routes of the loops were uncovered and the symmetry breaking during the unfaulting processes was further elucidated. A continuum model was formulated to analyze the energetics of the loops and predict the unfaulting threshold.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Darshan Bamney, Laurent Capolungo
Summary: This work investigates the formation of adjoining twin pairs (ATPs) at grain boundaries (GBs) in hexagonal close-packed (hcp) metals, focusing on the co-nucleation (CN) of pairs of deformation twins. A continuum defect mechanics model is proposed to study the energetic feasibility of CN of ATPs resulting from GB dislocation dissociation. The model reveals that CN is preferred over the nucleation of a single twin variant for low misorientation angle GBs. Further analysis considering GB character and twin system alignment suggests that CN events could be responsible for ATP formation even at low m' values.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Bing Han, Zhengqian Fu, Guoxiang Zhao, Xuefeng Chen, Genshui Wang, Fangfang Xu
Summary: This study investigates the behavior of electric-field induced antiferroelectric to ferroelectric (AFE-FE) phase transition and reveals the evolution of atomic displacement ordering as the cause for the transition behavior changing from sharp to diffuse. The novel semi-ordered configuration results from the competing interaction between long-range displacement modulation and compositional inhomogeneity, which leads to a diffuse AFE-FE transition while maintaining the switching field.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Akib Jabed, Golden Kumar
Summary: This study demonstrates that cryogenic rejuvenation promotes homogeneous-like flow and increases ductility in metallic glass samples. Conversely, annealing has the opposite effect, resulting in a smoother fracture surface.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xin Ji, Yan Chong, Satoshi Emura, Koichi Tsuchiya
Summary: A heterogeneous microstructure in Ti-15Mo-3Al alloy with heterogeneous distributions of Mo element and omega(iso) precipitates has achieved a four-fold increase in tensile ductility without a loss of tensile strength, by blocking the propagation of dislocation channels and preventing the formation of micro-cracks.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Amit Samanta, Prasanna Balaprakash, Sylvie Aubry, Brian K. Lin
Summary: This study proposes a combined large-scale first principles approach with machine learning and materials informatics to quickly explore the chemistry-composition space of advanced high strength steels (AHSS). The distribution of aluminum and manganese atoms in iron is systematically explored using first principles calculations to investigate low stacking fault energy configurations. The use of an automated machine learning tool, DeepHyper, speeds up the computational process. The study provides insights into the distribution of aluminum and manganese atoms in systems containing stacking faults and their effects on the equilibrium distribution.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Guowei Zhou, Yuanzhe Hu, Zizheng Cao, Myoung Gyu Lee, Dayong Li
Summary: In this work, a physics-constrained neural network is used to predict grain-level responses in FCC material by incorporating crystal plasticity theory. The key feature, shear strain rate of slip system, is identified based on crystal plasticity and incorporated into the loss function as physical constitutive equations. The introduction of physics constraints accelerates the convergence of the neural network model and improves prediction accuracy, especially for small-scale datasets. Transfer learning is performed to capture complex in-plane deformation of crystals with any initial orientations, including cyclic loading and arbitrary non-monotonic loading.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Pengfei Yang, Qichang Li, Zhongying Wang, Yuxiao Gao, Wei Jin, Weiping Xiao, Lei Wang, Fusheng Liu, Zexing Wu
Summary: In this study, the HER performance of Ru-based catalysts is significantly improved through the dual-doping strategy. The obtained catalyst exhibits excellent performance in alkaline freshwater and alkaline seawater, and can be stably operated in a self-assembled overall water splitting electrolyzer.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ilias Bikmukhametov, Garritt J. Tucker, Gregory B. Thompson
Summary: Depositing a Ni-1at. % P film can facilitate the formation of multiple quintuple twin junctions, resulting in a five-fold twin structure and a pentagonal pyramid surface topology. The ability to control material structures offers opportunities for creating novel surface topologies, which can be used as arrays of field emitters or textured surfaces.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Zening Yang, Weiwei Sun, Zhengyu Sun, Mutian Zhang, Jin Yu, Yubin Wen
Summary: Multicomponent oxides (MCOs) have wide applications and accurately predicting their thermal expansion remains challenging. This study introduces an innovative attention-based deep learning model, which achieves improved performance by using two self-attention modules and demonstrates adaptability and interpretability.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ze Liu, Cai Chen, Yuanxun Zhou, Lanting Zhang, Hong Wang
Summary: This study attempts to address the gap in cooling rates between thin film deposition and bulk metallic glass (BMG) casting by correlating the glass-forming range (GFR) determined from combinatorial materials chips (CMCs) with the glass-forming ability (GFA) of BMG. The results show that the full-width at half maximum (FWHM) of the first sharp diffraction peak (FSDP) is a good indicator of BMG GFA, and strong positive correlations between FWHM and the critical casting diameter (Dmax) are observed in various BMG systems. Furthermore, the Pearson correlation coefficients suggest possible similarities in the GFA natures of certain BMG pairs.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Mike Schneider, Jean-Philippe Couzinie, Amin Shalabi, Farhad Ibrahimkhel, Alberto Ferrari, Fritz Koermann, Guillaume Laplanche
Summary: This work aims to predict the microstructure of recrystallized medium and high-entropy alloys, particularly the density and thickness of annealing twins. Through experiments and simulations, a database is provided for twin boundary engineering in alloy development. The results also support existing theories and empirical relationships.
SCRIPTA MATERIALIA
(2024)
