Article
Materials Science, Multidisciplinary
Qizhi Li, Abhishek Nag, Xiquan Zheng, Fucong Chen, Jie Yuan, Kui Jin, Yi Lu, Ke-Jin Zhou, Yingying Peng
Summary: Recently, emergent superconductivity was discovered in MgTi2O4, which is attributed to the increase of electron doping and the suppression of orbital order. Ti L-edge resonant inelastic x-ray scattering was used to study the orbital excitations in superconducting and insulating MgTi2O4 films. The results provide spectroscopic evidence for the competition between orbital order and superconductivity in MgTi2O4 and shed light on searching for novel superconductors in spinel oxides.
Review
Chemistry, Multidisciplinary
Guohao Li, Brian C. Wyatt, Fei Song, Changqiang Yu, Zhenjun Wu, Xiuqiang Xie, Babak Anasori, Nan Zhang
Summary: Ti3C2Tx-based films exhibit excellent electrical, mechanical, and chemical properties, as well as convenient processability, achieved through layer-to-layer arrangement. They are widely used in various applications due to these appealing features.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
F. Crasto de Lima, B. Focassio, R. H. Miwa, A. Fazzio
Summary: Transition metal dichalcogenides have attracted significant attention for their applications and fundamental properties. In this study, we focus on single-layer PtSe2 and its derivative Pt2HgSe3, which exhibits topological insulator behavior. By combining ab-initio calculations and defect wave function percolation model, we investigate the stability and topological transition of Pt(HgxSe1-x)(2) alloys as a function of alloy concentration and Hg distribution. Our findings demonstrate the dependence of the topological phase on alloy concentration and its robustness with respect to the distribution. Furthermore, we estimate the threshold alloy concentration for topological transition to be as low as 9%.
Article
Materials Science, Multidisciplinary
Shishir Kumar Pandey, Abhinav Kumar, Sagar Sarkar, Priya Mahadevan
Summary: Through a combination of ab initio electronic structure calculations and microscopic modeling, the study investigates the origin of a charge-ordered ferromagnetic insulating state in VO2 with 12.5% Cr doping, successfully reproducing the state and charge ordering at V and Cr sites. The quantification of the energy gain from different exchange pathways sheds light on the role of charge ordering in stabilizing the ferromagnetic insulating state.
Article
Nanoscience & Nanotechnology
Yajuan Li, Yanfei Wu, Beibei Shao, Zheheng Song, Yusheng Wang, Jian Qiao, Jiangtao Di, Wei Wei, Tao Song, Baoquan Sun
Summary: A hydrovoltaic device utilizing an asymmetric structure of conductive polyaniline and Ti3C2TX MXene achieved high conductivity and surface charge density simultaneously. The incorporation of an extra polyvinyl alcohol layer between PANI and MXene maintained the asymmetric structure and constant voltage output. This work provides an alternative way to target high-efficiency hydrovoltaic devices with a large current density.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Qinyi Li, Weiyu Shi, Qingyuan Yang
Summary: This research explored the adsorption behavior of heavy metal cations on charged montmorillonite surfaces, revealing that polarization-induced covalent bonding is a strong adsorption force that can be controlled by regulating the energy of lone-pair electrons of surface O atoms. The mathematical relationship between the energy of lone-pair electrons and the electric field arising from surface charges was established through quantum mechanics analysis, providing insights into theoretical research and approaches for heavy metal cation removal/deactivation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Oga Norimasa, Masayuki Takashiri
Summary: Electrodeposition is a useful technique for preparing Bi2Te3 thin film thermoelectric generators, but challenges arise when depositing onto insulating substrates. By incorporating a sputtering step and post-thermal annealing, the thermoelectric properties of the films can be significantly improved, leading to enhanced power factors and figure of merit.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Computer Science, Interdisciplinary Applications
Honghui Shang, WanZhen Liang, Yunquan Zhang, Jinlong Yang
Summary: A new method for calculating response properties related to atomic displacement and electric field perturbation, based on real-space density-functional perturbation theory (DFPT), has been developed and implemented. The computation bottleneck of the response density matrix has been identified and a more efficient algorithm has been proposed, reducing the formal scaling from O(N-3) to O(N) with good parallel scalability. Validation has shown rapid and accurate computation of polarizabilities using DFPT, with computational efficiency demonstrated on massively parallel computer systems.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Jingxin Sang, Tan Zheng, Liu Xu, Xin Zhou, Shijian Tian, Jiatong Sun, Xiaofeng Xu, Jianqiang Wang, Shuguang Zhao, Yang Liu
Summary: This study discusses the effects of surface topology change on metal-insulator transition behaviors of VO2/Al2O3 thin films prepared by DC sputtering. It is found that grain size and lattice strain play significant roles in improving the metal-insulator transition, with increasing crystalline size enhancing sheet conductivity and lattice strain modulating T-MIT.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Jun Deng, Jinbo Pan, Yan-Fang Zhang, Shixuan Du
Summary: Databases for charge-neutral 2D building blocks have been established, but a database for charged 2D building blocks is still missing. In this study, a topological-scaling algorithm is used to identify 1028 charged 2D building blocks from the Materials Project database. These building blocks exhibit versatile functionalities and can be assembled to form 353 stable layered materials with enhanced and emergent properties compared to their parent materials. This database expands the design space of functional materials and has implications for fundamental research and potential applications.
Article
Physics, Applied
Wangqi Dai, Ziqiang Ma, Donglei Wang, Siyu Yang, Zhengwen Fu
Summary: The interface between a lithium metal and a solid electrolyte layer is crucial for the application of a lithium anode coated with solid electrolytes in lithium metal batteries. A three-layer interface solid electrolyte film based on carbon-doped lithium phosphate oxynitride (LiCPON) was used to improve the interface performance and compatibility between solid electrolyte films and lithium metals, and to suppress lithium dendrite during cycling. The incorporation of ultra-thin LiNbON into the LiCPON thin film significantly reduced interface impedance and improved the stability of the symmetric battery.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Zhihao Li, Xiucai Sun, Xiaoli Sun, Wan-Jian Yin, Zhongfan Liu
Summary: This study investigated the impact of substrate characteristics on the quality of graphene and found that the crystallographic orientation of the metal substrate, such as Cu (100), is crucial for producing high-quality and superclean graphene. The study also identified that low graphene defect density and high nucleation rate on the Cu(100) facet contribute to the suppression of amorphous carbon formation and facilitate rapid graphene synthesis.
Article
Engineering, Chemical
Zoheb Karim, Dimitrios Georgouvelas, Anna Svedberg, Susanna Monti, Aji P. Mathew
Summary: This study evaluates the potential of microfibrillated cellulose (MFC) composite membranes in removing charged pollutants from water. The results show that the assembly of the MFC membranes directly influences the pollutant removal efficiency, with the layered architecture being more efficient. The scalability and tunability of the produced MFC-based membranes are confirmed, along with their high adsorption capacity, flexibility, hydrolytic stability, and mechanical robustness.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Minh D. Nguyen, Hien D. Tong, Hung N. Vu
Summary: Thin-amorphous Al2O3 (AO) insulating layers were inserted into the SrRuO3-top-electrode/Pb0.9La0.1Zr0.52Ti0.48O3 (PL)/SrRuO3-bottom-electrode/Si structures to enhance the energy-storage performance of dielectric thin-film capacitors. By modulating the structure, a significant improvement in breakdown strength and energy-storage density was achieved in the PL/AO multilayer-film due to the combined effects of relaxor PL and amorphous AO layers.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yunzhe Jiang, Yidong Liu, Sylvain Grosjean, Volodymyr Bon, Patrick Hodapp, Anemar Bruno Kanj, Stefan Kaskel, Stefan Braese, Christof Woell, Lars Heinke
Summary: In this research, we achieved a directed responsive behavior of light-induced deformation by assembling light-powered molecules into a surface-mounted metal-organic framework film. The molecular extension changes were multiplied at the mesoscopic scale and transferred to the macroscopic scale, resulting in the bending of a cantilever and performing work.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Matthias Koch, Mark Pagan, Mats Persson, Sylwester Gawinkowski, Jacek Waluk, Takashi Kumagai
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2017)
Article
Nanoscience & Nanotechnology
Jose Martinez-Castro, Marten Piantek, Sonja Schubert, Mats Persson, David Serrate, Cyrus F. Hirjibehedin
NATURE NANOTECHNOLOGY
(2018)
Article
Chemistry, Physical
Takashi Kumagai, Janina N. Ladenthin, Yair Litman, Mariana Rossi, Leonhard Grill, Sylwester Gawinkowski, Jacek Waluk, Mats Persson
JOURNAL OF CHEMICAL PHYSICS
(2018)
Article
Nanoscience & Nanotechnology
Shadi Fatayer, Bruno Schuler, Wolfram Steurer, Ivan Scivetti, Jascha Repp, Leo Gross, Mats Persson, Gerhard Meyer
NATURE NANOTECHNOLOGY
(2018)
Article
Chemistry, Physical
S. Liu, D. Baugh, K. Motobayashi, X. Zhao, S. V. Levchenko, S. Gawinkowski, J. Waluk, L. Grill, M. Persson, T. Kumagai
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2018)
Article
Materials Science, Multidisciplinary
Sateesh Bandaru, Ivan Scivetti, Chi-Yung Yam, Gilberto Teobaldi
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2019)
Article
Multidisciplinary Sciences
T. Moorsom, M. Rogers, I Scivetti, S. Bandaru, G. Teobaldi, M. Valvidares, M. Flokstra, S. Lee, R. Stewart, T. Prokscha, P. Gargiani, N. Alosaimi, G. Stefanou, M. Ali, F. Al Ma'Mari, G. Burnell, B. J. Hickey, O. Cespedes
Article
Chemistry, Physical
Ivan Scivetti, Kakali Sen, Alin M. Elena, Ilian Todorov
JOURNAL OF PHYSICAL CHEMISTRY A
(2020)
Article
Nanoscience & Nanotechnology
Ivan Scivetti, Gilberto Teobaldi
Summary: Density functional theory (DFT) simulations reveal that compressive strain can enhance the reduction drive of LiMn2O4 films, while biaxial tension increases the magnetic moments of Mn atoms.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Qi Hu, Yufeng Xue, Jianxin Kang, Ivan Scivetti, Gilberto Teobaldi, Annabella Selloni, Lin Guo, Li-Min Liu
Summary: In this work, first-principles density functional theory (DFT) calculations were used to investigate the structure, electronic properties, and OER activity of beta-NiOOH. A previously overlooked structure with a uniform distribution of H atoms on the NiO2 layers was identified, and its stability was supported by comparing calculated bond lengths with experimental data. The study provides valuable insights for developing enhanced transition-metal hydroxide catalysts for the OER.
Article
Materials Science, Multidisciplinary
Ivan Scivetti, Gilberto Teobaldi
Summary: ALC_EQCM is a software that post-processes Electrochemical Quartz Crystal Microbalance (EQCM) data, allowing qualitative and quantitative characterization of the EQCM response. It can derive information of stoichiometric changes during electrochemical reactions and automatically generate atomistic models compatible with EQCM data. Additionally, ALC_EQCM can provide input files for Density Functional Theory simulations, allowing the study of complex reactions in electro-active materials.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Tzu-Ho Wu, Ivan Scivetti, Jia-Cing Chen, Jeng-An Wang, Gilberto Teobaldi, Chi-Chang Hu, Laurence J. Hardwick
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Takuma Omiya, Paolo Poli, Heike Arnolds, Rasmita Raval, Mats Persson, Yousoo Kim
CHEMICAL COMMUNICATIONS
(2017)