Article
Chemistry, Multidisciplinary
Jie Li, Liang-Yu Li, Peng Jia, Ilya Okulov
Summary: Due to the high demand of wearable electronics, flexible supercapacitors have been extensively developed in recent years. This study focuses on the electrochemical behavior of macroscopic nanoporous gold/polypyrrole (NPG/PPy) under compression deformation and reveals the decrease in electrochemical capacitance and increase in charge transfer resistance. The formation of new connections between neighboring ligaments under compression loads leads to the reduced mass transport of electrolyte.
Article
Materials Science, Multidisciplinary
Jie Li, Jurgen Markmann, Jorg Weissmueller, Nadiia Mameka
Summary: This study reveals a new phenomenon of reversible change in the elastic response of hybrid electrochemical actuators, attributed to the thickness of the polypyrrole layer. The interaction between polypyrrole and gold, as well as solvent intake, play crucial roles in determining the elastic properties of the material.
Article
Chemistry, Physical
Chaoyang Wang, Shengli Zhu, Yanqin Liang, Zhenduo Cui, Shuilin Wu, Chunling Qin, Shuiyuan Luo, Akihisa Inoue
Summary: A flexible nanoporous Ag@Co(OH)(2) thin film electrode was successfully developed with high volumetric capacitance and excellent supercapacitor performance, maintaining good performance even under bending conditions. This electrode exhibited high energy density at power density, showing potential applications in portable or wearable energy storage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Ye-Yuan Zhang, Lijie Zou, Ling-Zhi Liu, Hui Xie, Cui-Hong Li, Hai-Jun Jin
Summary: The self-organized anisotropic nanoporous gold (NPG) with unidirectional pore channels has shown significantly improved strength compared to previous studies. The unique structure and mechanical properties make it a promising material for various applications in the future.
Article
Chemistry, Multidisciplinary
Tangming Mo, Jiaxing Peng, Wenlei Dai, Ming Chen, Volker Presser, Guang Feng
Summary: Optimizing the synergy between nanoporous carbons and ionic liquids can significantly enhance the energy density of supercapacitors. By introducing an optimized horn-like entrance to the nanopore, the charging dynamics and energy storage of supercapacitors can be concurrently improved. The mechanism of improved charging lies in the gradual desolvation process and optimized ion motion paths.
Article
Materials Science, Multidisciplinary
Soo-Hyun Joo, I. Okulov, H. Kato
Summary: In this study, 3D interconnected nanoporous TiVNbMoTa HEAs were synthesized using liquid metal dealloying. Pre-transformation behavior significantly influences the dealloying mechanism, and two different orientation relationships were observed to affect ligament formation. This research paves the way for designing complex porous materials with customized morphology and advanced physical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Multidisciplinary
Zhenhan Li, Jianbin Lin, Xin He, Yue Xin, Ping Liang, Chi Zhang
Summary: Designing and modifying nanoporous metal foils for supercapacitors and catalysis is significant but challenging. In this study, CuxO nanoflakes were successfully grown on nanoporous Cu foil via electrooxidation, resulting in a high-performance electrode for supercapacitors and catalysts.
Article
Materials Science, Multidisciplinary
Birthe Zandersons, Lukas Luhrs, Yong Li, Joerg Weissmueller
Summary: Nanoporous gold (NPG) made by dealloying exhibits mechanical behavior strongly influenced by ligament size and solid volume fraction. Stiffness and strength of the material show a better correlation to the gold atom fraction x(Au)(0) compared to the solid volume fraction phi. Spontaneous plastic deformation events during dealloying may lead to macroscopic shrinkage, decoupling phi from x(Au)(0).
Article
Chemistry, Physical
Yujun Shi, Wanfeng Yang, Qingguo Bai, Jingyu Qin, Zhonghua Zhang
Summary: Nanoporous metals have shown great potential in various applications, and the liquid Ga-assisted alloying/dealloying strategy is a feasible and scalable method for fabricating substrate-supported nanoporous metals. The study found that the formation of wire-like and bulk-like nanoporous Ag is influenced by the interdiffusion of Ag and Ga atoms, and the thickness of the alloy layer shows a linear relationship with the mass loading of liquid Ga. The mechanical properties of the substrate-supported nanoporous Ag are excellent, which is crucial for future applications of nanoporous metals.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Samuel S. Welborn, Alexander Simafranca, Zeyu Wang, Heng Wei, Eric Detsi
Summary: This research presents a green alternative method for synthesizing NP-Au using chelation-mediated dealloying, which involves the use of non-toxic EDTA solution to produce high-quality NP-Au.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Multidisciplinary
Chuan Cheng, Luekas Luhrs
Summary: Dealloyed nanoporous gold exhibits high relative density, stability, and reversible actuation, making it a versatile material for various applications in electrochemical functionality and actuators.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Christoph Mahr, Alexandra Dworzak, Marco Schowalter, Mehtap Oezaslan, Andreas Rosenauer
Summary: Quantitative structural characterization of AgAu-alloy nanoparticles after corrosion reveals porous structures with potential applications in catalysis and surface-enhanced Raman spectroscopy. Three-dimensional reconstructions using scanning transmission electron microscopy tomography provide valuable structural information for simulations of diffusion and mass transport processes.
MICROSCOPY AND MICROANALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Federico Scaglione, Livio Battezzati, Paola Rizzi
Summary: Nanoporous gold (NPG) was synthesized through free corrosion dealloying and further anodization treatment to obtain a bimodal morphology. The resulting samples showed mechanical stability, active surface-enhanced Raman scattering (SERS) response, and good electrocatalytic properties.
Article
Engineering, Environmental
En Zhang, Lydia Galle, Stefanie Lochmann, Julia Grothe, Stefan Kaskel
Summary: Digitalization and the development of wireless communication technologies, mobile devices and smart systems are key drivers in modern society. Iontronics may play a crucial role in reducing energy consumption in computing and enabling communication between biological systems and artificial device structures. Multifunctional ion-electroadsorption devices have important applications in innovative sensor applications, biomedical systems, and future computing architectures.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Fei Li, Silang Luo, Fengsheng Qu, Dou Wang, Chao Li, Xue Liu
Summary: Nanoporous Au (NPG) prepared by electrochemical dealloying is important for surface-enhanced Raman scattering (SERS). In this study, the morphology and composition evolution of the NPG film during the electrochemical dealloying process were investigated. NPG films with stable pore diameter and diverse compositions were obtained, exhibiting enhanced SERS activity and excellent detection limit. This work provides insights into the morphology and composition evolution of NPG for enhanced SERS performance.
Article
Multidisciplinary Sciences
Ruirui Song, Jiuhui Han, Masayuki Okugawa, Rodion Belosludov, Takeshi Wada, Jing Jiang, Daixiu Wei, Akira Kudo, Yuan Tian, Mingwei Chen, Hidemi Kato
Summary: This study presents the fabrication of nanoporous intermetallic catalysts via liquid metal dealloying, which exhibit high electrocatalytic activity and durability in hydrogen production. The research sheds light on the intermetallic effect in dealloying, providing new insights for the development of advanced intermetallic catalysts for energy applications.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Qiwen Zhang, Yixuan Hu, Haofei Wu, Xiaoran Zhao, Mingliang Wang, Sihong Wang, Ruohan Feng, Qing Chen, Fang Song, Mingwei Chen, Pan Liu
Summary: The article reports on a eutectic dealloying strategy to activate porous spinel NiFe2O4 nanowires with multivalent cation substitutions. The obtained NiFeXO4 exhibits superior electrocatalytic performance for the oxygen evolution reaction, delivering a benchmark current density and high stability. This is attributed to lattice distortion and electronic coupling, as well as the absorption of H2O molecules facilitated by the multication substitution strategy.
Article
Chemistry, Multidisciplinary
Ling Zhang, Zhiyu Jing, Zhexiao Li, Takeshi Fujita
Summary: By controlling electrochemical dealloying, we modified the ligament surface of nanoporous gold (NPG) to improve its surface-enhanced Raman scattering (SERS) property. The presence of high-density atomic steps and kinks on the curved surfaces, as well as high-content silver atoms close to the ligament surface, contributed to the high SERS ability. This strategy is important for the fabrication of nanoporous metals with excellent surface properties for sensing, conversion, and catalysis.
Article
Materials Science, Multidisciplinary
Yidi Shen, Kolan Madhav Reddy, Jun Li, Mingwei Chen, Qi An
Summary: We investigated the deformation mechanisms in superhard boron carbide (B4C) using a combination of molecular dynamics simulations and transmission electron microscopy experiments. Interestingly, we observed an anomalous quasi-plastic deformation in B4C under ideal shear deformation along the (111)[112] slip system. This behavior can be attributed to the formation and propagation of slip bands, which are stabilized by newly formed bonding during deformation. On the other hand, the dislocation-like mechanism mediated amorphization was observed in B4C under shear deformation along other slip systems.
Article
Chemistry, Multidisciplinary
Kemeng Ji, Guohong Liang, Yuhao Shen, Hongxing Dai, Jiuhui Han, Yoshikazu Ito, Takeshi Fujita, Jun-ichi Fujita, Chengyang Wang, Mingming Chen
Summary: Ordered porous functional materials, including microporous metal-organic frameworks and mesoporous silica, have been extensively studied for their unique physiochemical properties and broad potential applications. However, the lack of ordered macroporous materials, especially those with high crystallinity, hinders the extension of these advantages to a larger scale. Through a co-sacrificial template sequential pyrolysis process, a three-dimensionally ordered macroporous framework material, OMGCs, has been developed, consisting of well-crystallized graphenic carbon and uniformly dispersed metallic nanocrystals. These OMGCs exhibit a low-temperature formation mechanism and may greatly expand the family of ordered porous framework materials for emerging applications.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Article
Engineering, Environmental
Linghui Li, Satoshi Hagiwara, Cheng Jiang, Haruki Kusaka, Norinobu Watanabe, Takeshi Fujita, Fumiaki Kuroda, Akiyasu Yamamoto, Masashi Miyakawa, Takashi Taniguchi, Hideo Hosono, Minoru Otani, Takahiro Kondo
Summary: The current energy crisis and environmental problems associated with fossil fuel use have led to a growing interest in the development of robust, low-cost, and high-performance electrocatalysts for oxygen evolution reaction (OER) in alkaline media. In this study, an OER electrocatalyst is prepared by hybridizing rhombohedral boron monosulfide with graphene, resulting in improved electronic conductivity. The catalytic activity of this electrocatalyst surpasses that of most previously reported counterparts, with an overpotential of 250 mV at 10 mA cm-2. These findings open up possibilities for designing electrocatalysts composed of abundant elements for various renewable energy applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Takumi Nakano, Toshihiko Maeda, Takeshi Fujita, Aichi Yamashita
Summary: The substitution effects of 3d transition metal elements (Fe, Co, and Zn) on the Cu site in (Pb,Cu)-1-2-0-1 were investigated, resulting in the successful synthesis of new materials (Pb0.5M0.5)(Sr0.75La0.25)2CuOz (M = Fe and Co) and (Pb0.5Zn0.5)(Sr0.5La0.5)2CuOz. Superconductivity was only observed in the case of M = Zn.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Takeshi Fujita
Summary: "High-entropy alloy (HEA) catalysts have gained significant research interest for their versatile performances. However, the research on these catalysts is still in its early stages, with challenges in fabrication, element selection, and application. This review summarizes the current literature on HEA catalysts, focusing on synthesis routes, morphological tunability, attractive applications, and material discoveries using machine learning and high-throughput experiments. Finally, it presents perspectives and concepts for designing desired multifunctional HEA catalysts."
MATERIALS TRANSACTIONS
(2023)
Article
Materials Science, Multidisciplinary
Linghui Li, Norinobu Watanabe, Cheng Jiang, Akiyasu Yamamoto, Takeshi Fujita, Masashi Miyakawa, Takashi Taniguchi, Hideo Hosono, Takahiro Kondo
Summary: In this study, a high-performance oxygen evolution reaction (OER) catalyst was successfully prepared by introducing nickel foam as a supporting material. The resulting catalyst exhibited low overpotential and excellent durability at high current densities, which can be attributed to the unique morphology of nickel foam and the support effect of graphene.
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Christopher Florencio Aleman, Jiecheng Lyu, Mehmet A. Noyan, Kathleen M. McCreary, Jiuhui Han, Isaac Johnson, Qingyang Gao, Maximilian Niebur, Berend T. Jonker, Mingwei Chen
Summary: A three-dimensional nanoarchitectured hexagonal boron nitride (hBN) is developed with integrated single photon emitters (SPEs) generated from native defects. The structure consists of a continuous 2D hBN sheet with built-in convex and concave curvatures, promoting the formation of optically active and thermally stable defects. The 3D hBN eliminates substrate disturbance and minimizes lattice strain heterogeneity, resulting in narrow spectral distribution of SPEs.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Takashi Hihara, Yasuyuki Banno, Makoto Nagata, Takeshi Fujita, Hideki Abe
Summary: Atmosphere-treated Pd/CeO2 shows improved catalytic performance in the remediation of lean-burn exhausts at temperatures <300℃. The improvement is attributed to the oxidative decomposition of PdCx species during catalysis, which creates surface Pd sites to promote the remediation process.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Tomoya Yoshizaki, Takeshi Fujita
Summary: This study fabricated and characterized nanoporous high-entropy alloy catalysts using dealloying, and investigated their thermal stabilities and phase separation behaviors. A network visualization technique was employed to discern the affinity of different elements in extreme mixing states, providing valuable insights for the design of novel thermally-stable high-entropy alloys and catalysts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Mengjia Wang, Ruichun Luo, Yuxin Liu, Xiaoran Zhao, Xiaodong Zhuang, Wen Wu Xu, Mingwei Chen, Pan Liu
Summary: The interface engineering of 2D transition metal dichalcogenides (2D-TMDs) and metals is an efficient method to adjust their electrical and optoelectronic properties. In this study, a 2D non-van der Waals (vdW) Mo-rich phase was discovered during the growth of molybdenum disulfide (MoS2) from a Mo-Au surface alloy in a S-poor environment. This Mo-rich phase preferentially nucleates between the outermost 2D MoS2 and a 3D nanostructured Au substrate, leading to a n-type contact interface with an ultralow transition energy barrier height.
Article
Chemistry, Physical
Shusaku Shoji, Abdillah Sani Bin Mohd Najib, Min-Wen Yu, Tomokazu Yamamoto, Sou Yasuhara, Akira Yamaguchi, Xiaobo Peng, Syo Matsumura, Satoshi Ishii, Yohei Cho, Takeshi Fujita, Shigenori Ueda, Kuo-Ping Chen, Hideki Abe, Masahiro Miyauchi
Summary: In this study, a metal-oxide nanocomposite Rh#CeO2 was found to efficiently separate photoexcited electrons and holes, achieving high-performance photocatalytic dry reforming of methane with no other side reactions.
Article
Chemistry, Multidisciplinary
Ryo Toyama, Shiro Kawachi, Jun-ichi Yamaura, Takeshi Fujita, Youichi Murakami, Hideo Hosono, Yutaka Majima
Summary: A concept of nanostructure-induced L1(0)-ordering is proposed to achieve the fabrication of L1(0)-ordered CoPt ferromagnetic nanowires with twinned single-crystals on Si/SiO2 substrates. The driving forces for nanostructure-induced L1(0)-ordering during annealing are atomic surface diffusion and extremely large internal stress at ultrasmall curvature radii of the nanowires.
NANOSCALE ADVANCES
(2022)
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)