Article
Chemistry, Physical
Yaoxiang Jiang, Xin Wu, Jianguo Niu, Yunpeng Zhou, Ning Jiang, Fei Guo, Bo Yang, Shifeng Zhao
Summary: Switchable polarization behavior at room temperature is achieved in [(La2NiMnO6)/(La2CoMnO6)](n) double-perovskite magnetic superlattice films by engineering a microstructure with gradient strains, while the ferromagnetic Curie temperature does not show rapid decrease.
Article
Physics, Multidisciplinary
Hongwei Wang, Fujie Tang, Massimiliano Stengel, Hongjun Xiang, Qi An, Tony Low, Xifan Wu
Summary: The study proposes a thin-film design method to stabilize the functional BFO-type structure, expanding the application scope of perovskite materials. Through research on CTO-type and BFO-type perovskites, it is found that the electrical properties of both are influenced by mechanical and electric boundary conditions.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Zhaoting Zhang, Hong Yan, Zhen Huang, Xiao Chi, Changjian Li, Zhi Shiuh Lim, Shengwei Zeng, Kun Han, Ganesh Ji Omar, Kexin Jin, Ariando Ariando
Summary: The magnetic properties of epitaxial double-perovskite Sr2FeReO6 films can be tuned by adjusting the deposition pressure of oxygen and lattice mismatch. Epitaxial strain modulates B-site ordering by affecting elemental valence, leading to changes in magnetic behavior.
Article
Materials Science, Ceramics
Jie Yin, Chongyang Li, Bo Wu, Zhitao Li, Jiagang Wu
Summary: In this work, the CuO-modified KNbO3 exhibited superior piezoelectric responses under different external field conditions. The discrepancies of characteristic frequency for defect dipoles transformation and ferroelectric domains switching were found to affect the electro-strain behaviors. The research provides insights into designing high-performance KNbO3-based perovskite ferroelectrics by exploring the potential of dynamic defect dipoles.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Qian Cheng, Boxin Wang, Gaosheng Huang, Yanxun Li, Xing Li, Jieyi Chen, Shengli Yue, Kang Li, Hong Zhang, Yuan Zhang, Huiqiong Zhou
Summary: This study investigates the residual strain in a two-dimensional Ruddlesden-Popper perovskite film and finds that the spacer cations contribute to the residual strain. By strain relaxation, the film quality is improved, leading to enhanced efficiency and good stability in unstable environments.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Multidisciplinary Sciences
Ihor Cherniukh, Gabriele Raino, Thilo Stoeferle, Max Burian, Alex Travesset, Denys Naumenko, Heinz Amenitsch, Rolf Erni, Rainer F. Mahrt, Maryna I. Bodnarchuk, Maksym V. Kovalenko
Summary: Through precise structural engineering, perovskite nanocrystals are co-assembled with other nanocrystal materials to form a range of binary and ternary perovskite-type superlattices that exhibit superfluorescence. These ABO3 superlattices, as well as the binary NaCl and AlB2 superlattice structures that we demonstrate, exhibit a high degree of orientational ordering of the CsPbBr3 nanocubes. They also exhibit superfluorescence – a collective emission that results in a burst of photons with ultrafast radiative decay (22 picoseconds) that could be tailored for use in ultrabright (quantum) light sources.
Article
Chemistry, Multidisciplinary
Jiayue Wang, Dmitri Kalaev, Jing Yang, Iradwikanari Waluyo, Adrian Hunt, Jerzy T. Sadowski, Harry L. Tuller, Bilge Yildiz
Summary: Exsolution is a recent advancement in fabricating oxide-supported metal nanoparticle catalysts. The kinetics of metal exsolution depends on the kinetics of oxygen release from the host oxide, in addition to the kinetics of metal cation diffusion. This study demonstrates that in the thin-film perovskite SrTi0.65Fe0.35O3 (STF) system, surface oxygen release governs the metal nanoparticle exsolution kinetics. Increasing the oxygen release rate in STF accelerates the Fe0 exsolution kinetics and increases the quantity of exsolved Fe0 over time.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Francisco Sanchez-Ochoa, Alberto Rubio-Ponce, Florentino Lopez-Urias
Summary: External hydrostatic pressure (P) is a controllable and clean method to tune the energy position of van Hove singularities in twisted bilayer graphene (TBLG). This study reveals the ground-state properties of high-angle TBLG with different parities under vertical hydrostatic P. The results demonstrate the importance of external P and parity in the electronic structure of TBLG, and their potential implications in experiments.
Article
Chemistry, Physical
Hongwei Zhu, Linfeng Pan, Felix T. Eickemeyer, Michael A. Hope, Olivier Ouellette, Anwar Qasem M. Alanazi, Jing Gao, Thomas Paul Baumeler, Xianggao Li, Shirong Wang, Shaik M. Zakeeruddin, Yuhang Liu, Lyndon Emsley, Michael Graetzel
Summary: In this study, we demonstrate the preparation of high-quality MAPbBr(3) perovskite films through methylamine vapor treatment and neopentylammonium chloride passivation. The methylamine treatment effectively smooths the perovskite surface, while the neopentylammonium chloride passivation eliminates surface defects and improves the stability of the perovskite solar cell. Our results show unprecedented performance and stability in mesoporous single junction PSCs.
ACS ENERGY LETTERS
(2022)
Article
Chemistry, Physical
Dilpreet Singh Mann, Sung -Nam Kwon, Pramila Patil, Seok-In Na
Summary: Nickel nitrate is used to eliminate defect sites and hydroxyl groups on the surface of nickel oxide (NiOx), and a uniform and ultra-thin nickel nitride (NixN) layer is formed via spin coating at low temperatures. This approach improves the interface losses between NiOx and the perovskite layer, enhances charge extraction and transportation, and reduces charge recombination, resulting in high efficiency and long-term operational stability in perovskite solar cells (PSCs).
Article
Multidisciplinary Sciences
Ilya Svetlizky, Seongsoo Kim, David A. Weitz, Frans Spaepen
Summary: This study uses colloidal crystals to investigate the interactions and evolution of dislocations during plastic deformation, providing insights into the macroscopic deformation and atomic-scale dislocation dynamics of materials.
NATURE COMMUNICATIONS
(2023)
Review
Materials Science, Multidisciplinary
Atanu Jana, Abhishek Meena, Supriya A. Patil, Yongcheol Jo, Sangeun Cho, Youngsin Park, Vijaya Gopalan Sree, Hyungsang Kim, Hyunsik Im, Robert A. Taylor
Summary: The self-assembly phenomenon is important in various fields, including atomic, molecular, biological, and colloidal nanocrystals. Self-assembly of colloidal nanocrystals can form superstructures with distinct physical and chemical properties. The self-assembly of colloidal perovskite nanocrystals has become a frontier in nanotechnology and has attracted remarkable attention in recent years.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Takaaki Taniguchi, Leanddas Nurdiwijayanto, Nobuyuki Sakai, Kazuhito Tsukagoshi, Takayoshi Sasaki, Tatsuki Tsugawa, Michio Koinuma, Kazuto Hatakeyama, Shintaro Ida
Summary: The unique characteristics and low cost of graphene oxide make it a promising nanocarbon material for practical applications. However, the controversy surrounding the two-dimensional structure of graphene oxide hinders its development. Through the use of advanced X-ray diffraction techniques, researchers have successfully elucidated the true 2D structure of graphene oxide, providing a better understanding for the design and interpretation of graphene oxide-related materials.
Article
Chemistry, Physical
Kashimul Hossain, Shivam Singh, Dinesh Kabra
Summary: Perovskite solar cells (PSCs) are the fastest-growing photovoltaic devices that have shown improved efficiency and stability through introducing multiple cations into the perovskite crystal structure. Through frequency-dependent photocurrent and dielectric measurements, this study compared PSCs based on triple monovalent cation CsFAMA with PSCs based on single monovalent cation MAPI. The results showed that CsFAMA-based PSCs had a lower dielectric relaxation time constant (tau(d)) compared to MAPI-based PSCs, which is attributed to a lower dielectric constant. The study also found a correlation between the relaxation process and the presence of monovalent cations, relative defect density, and thermal stability.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Multidisciplinary Sciences
Xiao Li, Zhenjie Xue, Xiangyu Chen, Xuezhi Qiao, Guang Mo, Wensheng Bu, Bo Guan, Tie Wang
Summary: Hierarchical assemblies of functional nanoparticles have great potential for applications beyond individual constituents. In this study, CsPbBr3 perovskite nanocubes self-assemble into ordered arrays and exhibit single-crystal-like diffraction patterns and higher fluorescence intensity compared to random aggregates. These multiscale coherent states can serve as high-efficiency and directional quantum light sources.
Article
Chemistry, Multidisciplinary
Fei Jin, Yuanming Zhu, Li Li, Zizhao Pan, Desheng Pan, Meng Gu, Qian Li, Lang Chen, Hong Wang
Summary: High-entropy strategy is used to fabricate an ultra-thin spinel ferrite film with superior saturation magnetization, low coercivity, excellent resistivity, and switchable magnetic anisotropy, which is of great significance for the development of high-density memory devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xinzhen Lu, Yifeng Cheng, Menghao Li, Yucheng Zou, Cheng Zhen, Duojie Wu, Xianbin Wei, Xiangyan Li, Xuming Yang, Meng Gu
Summary: Solid-state lithium metal batteries (SSLMBs) with high energy density and intrinsic safety still suffer from poor interfacial stability. A novel polymer electrolyte with high room-temperature ionic conductivity and excellent interfacial stability is developed. The study reveals the high interfacial compatibility between Li metal anode and the polymer electrolyte, which is crucial for improving the performance of SSLMBs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Huijuan Huang, Yunlei Wang, Menghao Li, Hai Yang, Zhihao Chen, Yang Jiang, Shufen Ye, Yaxiong Yang, Shengnan He, Hongge Pan, Xiaojun Wu, Yu Yao, Meng Gu, Yan Yu
Summary: A Ni3S2/Ni3P heterostructure with high work function is constructed to suppress electrolyte decomposition in long-term sodiation process, improving the cyclability and safety of rechargeable sodium-metal batteries. The heterostructure also enhances ion-transport kinetics and enables the formation of stable solid electrolyte interphase for dendrite-free sodium anode.
ADVANCED MATERIALS
(2023)
Article
Physics, Applied
Nigel D. Browning, Jony Castagna, Angus I. Kirkland, Amirafshar Moshtaghpour, Daniel Nicholls, Alex W. Robinson, Jack Wells, Yalin Zheng
Summary: Images and spectra obtained from aberration corrected STEM are widely used for quantitative analysis of nanostructures and materials/biological systems. However, achieving atomic resolution observations with these capabilities is challenging due to potential electron beam modification during image acquisition, especially for in situ observations. This paper describes a methodology of sub-sampling and Inpainting to efficiently use the dose and minimize beam effects, as well as discusses the potential of Inpainting for real-time dynamic experiments.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Menghao Li, Qing Zhang, Xuming Yang, Yuanmin Zhu, Yifeng Cheng, Shaocheng Shen, Meng Gu
Summary: By characterizing the solid electrolyte interphase (SEI) using cryogenic electron microscopy (Cryo-EM), we investigated the influence of solvation structure on SEI formation and electrochemical performance. The SEI formed in low-concentration electrolytes exhibited a mosaic-type structure, leading to uneven lithium deposition and poor cycle stability. In contrast, high-concentration electrolytes generated an amorphous monolayer SEI, resulting in improved Coulombic efficiency and cycle stability.
JOURNAL OF POWER SOURCES
(2023)
Article
Multidisciplinary Sciences
Jianwen Liang, Yuanmin Zhu, Xiaona Li, Jing Luo, Sixu Deng, Yang Zhao, Yipeng Sun, Duojie Wu, Yongfeng Hu, Weihan Li, Tsun-Kong Sham, Ruying Li, Meng Gu, Xueliang Sun
Summary: Layered oxide cathode active materials suffer from interfacial structural instability when coupled with sulfide solid-state electrolytes. Here, the authors propose a gradient coating with a lithium oxythiophosphate layer that can stabilize the cathode|solid-state electrolyte interface. This coating effectively hinders structural degradation and allows for a specific discharge capacity of 128mAh/g after almost 250 cycles.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Zhuyang Chen, Chen Xu, Fu Zhao, Shibo Xi, Weixuan Li, Mingcheng Huang, Bijun Cai, Meng Gu, Hsing-Lin Wang, X-D Xiang
Summary: A combinatorial high-throughput aerogel synthesis method was developed to study the synergistic catalytic effects of multiple non-noble metal elements. Various aerogels with different compositions were synthesized and ternary phase diagrams of composition-electrocatalytic performance were constructed. Outstanding aerogel catalysts with excellent catalytic performance and stability for the oxygen evolution reaction (OER) were discovered.
Article
Materials Science, Multidisciplinary
Qian Yang, Menghao Li, Kaixiang Lei, Siyuan Li, Zheng Liu, Shenxu Chu, Yangyang Zhang, Kezhu Jiang, Meng Gu, Fujun Li, Shijian Zheng
Summary: Graphite anodes face challenges in potassium-ion batteries due to volume fluctuation and dendrite growth. In this study, an anion-derived interphase with high strength and conductivity is created using an amide-based electrolyte. The interphase buffers volume change, suppresses dendrite propagation, and facilitates ion diffusion. Stable plating and stripping of symmetric K//K cells with low polarization is achieved. The graphite electrode shows highly reversible phase transition and high discharge capacity, and the assembled full battery exhibits high energy density. This work emphasizes the importance of interfacial structure and provides a new strategy for designing high-performance electrolytes.
SCIENCE CHINA-MATERIALS
(2023)
Letter
Chemistry, Multidisciplinary
Jing Wang, Yian Wang, Chao Cai, Yushen Liu, Duojie Wu, Maoyu Wang, Menghao Li, Xianbin Wei, Minhua Shao, Meng Gu
Summary: The electrochemical nitrate reduction reaction (NO3RR) is a promising alternative route to produce ammonia (NH3) sustainably. Cu-doped Fe3O4 flakes are fabricated and demonstrated to be excellent catalysts for electrochemical conversion of NO3- to NH3, with high Faradaic efficiencies and NH3 yields. Theoretical calculations show that Cu doping facilitates the reaction thermodynamically. These results highlight the feasibility of improving NO3RR activity using heteroatom doping strategies.
Article
Chemistry, Multidisciplinary
Qing Zhang, Chuan Zhou, Menghao Li, Yuanmin Zhu, Xianbin Wei, Shaocheng Shen, Zongwei Ji, Guangfu Luo, Yifeng Cheng, Xuming Yang, Zhijie Wang, Lingfeng Zou, Lin Zeng, Junhao Lin, Lei Li, Joseph S. Francisco, Meng Gu
Summary: High-concentrated non-flammable electrolytes (HCNFE) in lithium metal batteries can prevent thermal runaway accidents, and the microstructure of their solid electrolyte interphase (SEI) has been explored using cryo-HRTEM. The SEI in HCNFE exhibits a uniform laminated crystalline-amorphous structure that prevents further reaction between the electrolyte and lithium. Li2S2O7, the inorganic SEI component, is precisely identified using cryo-HRTEM. Density functional theory (DFT) calculations show that the final Li2S2O7 phase has suitable natural transmission channels for Li-ion diffusion and excellent ionic conductivity of 1.2 x 10(-5) S cm(-1).
Article
Materials Science, Multidisciplinary
D. Samal, Nicolas Gauquelin, Yayoi Takamura, Ivan Lobato, Elke Arenholz, Sandra Van Aert, Mark Huijben, Zhicheng Zhong, Jo Verbeeck, Gustaaf Van Tendeloo, Gertjan Koster
Summary: Epitaxial stabilization of thermodynamically metastable phases and advances in atomic control of complex oxide thin-film growth can be used to realize novel phenomena. In this study, infinite layer (IL) based cuprate superlattices were investigated, and it was found that only the [SCCO/BCO] superlattice (SL) exhibited superconductivity, while the insertion of an STO spacer layer prevented superconductivity. The unexpected structure of BCO was unraveled, which contributes to understanding the superconductivity in [SCCO/BCO] SL.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yaqi He, Cheng Zhen, Menghao Li, Xianbin Wei, Cheng Li, Yuanmin Zhu, Xuming Yang, M. Danny Gu
Summary: Fluoroethylene carbonate (FEC) significantly improves the cycle stability and Coulombic efficiency of dual-graphite batteries. FEC participates in anodic side reactions and forms a thin and uniform solid-electrolyte interphase layer, reducing graphite exfoliation and enhancing stability. Its impact on cation and anion intercalation differs, and it overturns the paradigm of attributing cathodic performance to cathode-electrolyte interphase (CEI) features.
Article
Chemistry, Physical
Hongmei Chen, Adrian M. M. Gardner, Guoan Lin, Wei Zhao, Xue Wang, Mounib Bahri, Nigel D. D. Browning, Xiaoxiang Xu, Xiaobo Li
Summary: In this study, a triazine-based COF (TAPT-Bpy-COF) coordinated with cobalt as cocatalysts showed visible-light-driven photocatalytic water oxidation. Its highly ordered structures, high surface area, good wettability, and enhanced charge separation contributed to its high photocatalytic oxygen evolution activity. This work demonstrates the potential of COFs for photocatalytic oxygen evolution half-reaction and overall water splitting.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Canhui Zhang, Xingkun Wang, Zhentao Ma, Hanxu Yao, Hengjun Liu, Cheng Li, Jian Zhou, Ren Xu, Xusheng Zheng, Huanlei Wang, Qiang Li, Meng Gu, Heqing Jiang, Minghua Huang
Summary: This study deliberately constructs Fe/Ni-NHCS as an ORR catalyst, which achieves excellent ORR performance and ultra-long-term stability by optimizing the electron spin state and reducing the energy barrier. It opens up a new avenue for energy conversion technologies.
Article
Biotechnology & Applied Microbiology
Yu Chen, Song Gao, Jingwen Zhou, Weizhu Zeng
Summary: This study investigates the mechanism of Eaf3p, a chromatin regulator, in regulating nitrogen metabolism in Saccharomyces cerevisiae. The results show that Eaf3p regulates the expression of multiple nitrogen metabolic genes by modifying histone acetylation of the promoter regions via the histone acetyltransferase NuA4 complex. Eaf3p binds to the promoters of GAT1, CAN1, LYP1, GLN3, and HIP1 to regulate their expression. This research contributes to the understanding of S. cerevisiae nitrogen metabolism regulation and provides insights for future metabolic engineering and industrial applications.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2023)
