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Christ N, Scheuring BM, Schelleis C, Liebig WV, Montesano J, Weidenmann KA, Hohe J. Characterization and Simulation of the Interface between a Continuous and Discontinuous Carbon Fiber Reinforced Thermoplastic by Using the Climbing Drum Peel Test Considering Humidity. Polymers (Basel) 2024; 16:976. [PMID: 38611234 PMCID: PMC11013600 DOI: 10.3390/polym16070976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 03/21/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024] Open
Abstract
The objective of this paper is to investigate the debonding behavior of the interface between continuously and discontinuously fiber reinforced thermoplastics using the climbing drum peel test. The study emphasizes on the importance of considering different climatic boundary conditions on the properties of thermoplastics. Specimens with varying moisture contents, from 0m.% up to above 6m.% are prepared and tested. It is observed that an increase in moisture content from 0m.% to 2m.% results in an increase of the fracture surface energy from 1.07·103J/m2 to 2.40·103J/m2 required to separate the two materials, but a further increase in moisture to 6.35m.% conversely results in a subsequent decrease of the required energy to 1.91·103J/m2. The study presents an explanatory model of increasing plasticization of the polymer due to increased polymer chain mobility, which results in more deformation energy being required to propagate the crack, which is corroborated in SEM investigations of the fracture surface. A further increase in humidity leads to polymer degradation due to hydrolysis, which explains the subsequent reduction of the fracture energy. The experimental set up is modeled numerically for the first time with cohesive surfaces, which could successfully reproduce the effective force-displacement curve in the experiment by varying the interface parameters in the model over an influence length, allowing the conclusion of a process induced variation in the interface properties over a specific consolidation length.
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Affiliation(s)
- Nicolas Christ
- Institute for Applied Materials, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany; (B.M.S.); (W.V.L.)
- Component Safety and Lightweight Construction, Fraunhofer Institute for Mechanics of Materials, 79108 Freiburg, Germany;
| | - Benedikt M. Scheuring
- Institute for Applied Materials, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany; (B.M.S.); (W.V.L.)
| | - Christoph Schelleis
- Polymer Engineering, Fraunhofer Institute for Chemical Technology ICT, 76327 Pfinztal, Germany;
- Lightweight Design, Institute of Vehicle Systems Technology, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Wilfried V. Liebig
- Institute for Applied Materials, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany; (B.M.S.); (W.V.L.)
| | - John Montesano
- Department of Mechanical and Mechatronics Engineering, Univesity of Waterloo, Waterloo, ON N2L 3W8, Canada;
| | - Kay A. Weidenmann
- Institute of Materials Resource Management, University of Augsburg, 86159 Augsburg, Germany;
| | - Jörg Hohe
- Component Safety and Lightweight Construction, Fraunhofer Institute for Mechanics of Materials, 79108 Freiburg, Germany;
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2
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Xu Y, Hou M, Wang J. Porous Gradient Composite with Dependable Superhydrophobic Protection for Multifunctional Electromagnetic Interference Shielding. ACS Appl Mater Interfaces 2024; 16:3978-3990. [PMID: 38193850 DOI: 10.1021/acsami.3c15242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
Simultaneously realizing high electromagnetic interference (EMI) shielding and superhydrophobic properties of materials to ensure long-term stability in harsh environments is a very challenging task. In this work, an efficient superhydrophobic EMI shielding composite with a gradient conductivity and porous structure was prepared by chemical plating, in situ polymerization, and spraying processes. Benefiting from the structural characteristics of porous multilayers and the rational distribution of electromagnetic two-component fillers in the composite, as well as the synergistic effect of various electromagnetic loss mechanisms, a perfect unification of high EMI shielding effectiveness of 62 dB and high absorption coefficient (A) of 0.77 was achieved. Meanwhile, a thin layer with further enhanced impedance matching was constructed on the surface of the composite using double-sized mixed particles of Fe3O4 and graphite particles (GP) in conjunction with the spraying process. The rough surface microstructure of the thin layer bestows the composite superhydrophobicity, and even after long-term immersion in acidic and alkali solutions or repetitive bending, the water contact angle still remains at a high level. Additionally, the sprayed materials also endow the composite with outstanding photothermal conversion properties that enhance the ability to adapt to environmental changes, significantly raising the practical application value.
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Affiliation(s)
- Yujie Xu
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, People's Republic of China
| | - Minghuan Hou
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, People's Republic of China
| | - Jian Wang
- School of Materials Science and Engineering, Xihua University, Chengdu 610039, People's Republic of China
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3
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O'Keeffe M, Treacy MMJ. Isogonal 2-periodic polycatenanes: chain mail. Acta Crystallogr A Found Adv 2024; 80:86-93. [PMID: 38031932 DOI: 10.1107/s2053273323009543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 10/31/2023] [Indexed: 12/01/2023] Open
Abstract
For 2-periodic polycatenanes with isogonal (vertex-transitive) embeddings, the basic units linked are torus knots and links including the unknots (untangled polygons). Twenty-four infinite families have been identified, with hexagonal, tetragonal or rectangular symmetry. The simplest members of each family are described and illustrated. A method for determining the catenation number of a ring based on electromagnetic theory is described.
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Affiliation(s)
- Michael O'Keeffe
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA
| | - Michael M J Treacy
- Department of Physics, Arizona State University, Tempe, Arizona 85287, USA
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4
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Luo RJ, Bao J, Li XL, Ma C, Du CY, Zeng J, Xu X, Qian Z, Mei Z, Zhou YN. Tetrahedral Occupied V Ions Enabling Reversible Three-Electron Redox of Cr 3+ /Cr 6+ in Layered Cathode Materials for Potassium-Ion Batteries. Small 2024; 20:e2304945. [PMID: 37675818 DOI: 10.1002/smll.202304945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/16/2023] [Indexed: 09/08/2023]
Abstract
Reversible three-electron redox of Cr3+ /Cr6+ in layered cathode materials for rechargeable batteries is very attractive in layered cathode materials, which leads to high capacity and energy density for rechargeable batteries. However, the poor reversibility and Cr-ion migration make it very challenging. In this work, by introducing V ions into tetrahedral sites of layer-structured NaCrO2 , reversible three-electron redox of Cr3+ /Cr6+ is realized successfully in NaCr0.92 V0.05 O2 (NCV05) cathode for potassium-ion batteries with a cut-off voltage of 4.0 V. V ions can weaken the attraction of Cr to electrons, leading to enhanced valence change of Cr ions. On the other hand, V in tetrahedral sites can facilitate the reversible migration of Cr between octahedral and tetrahedral sites via coulombic repulsion to realize the reversible redox between Cr3+ and Cr6+ during charge and discharge processes. In addition, V ions can inhibit the phase transition from O3 phase to O'3 phase during the charge process by adjusting the crystal lattices. As a result, the NaCr0.92 V0.05 O2 cathode exhibits a high reversible capacity of 130 mAh g-1 with promising cycle stability and rate capability. The strategy opens new opportunity for developing high-capacity cathode materials for potassium-ion batteries.
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Affiliation(s)
- Rui-Jie Luo
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Jian Bao
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Xun-Lu Li
- Global Institute of Future Technology, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Cui Ma
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Chong-Yu Du
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Jie Zeng
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Xuan Xu
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Zhe Qian
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Zhe Mei
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Yong-Ning Zhou
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
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5
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Li B, Bai H, Yu Z, Li Y, Kwok CT, Feng W, Wang S, Ng KW. Electronic and magnetic properties of layered M 3Si 2Te 6(M = alkaline earth and transition metals). J Phys Condens Matter 2023; 36:065801. [PMID: 37813101 DOI: 10.1088/1361-648x/ad0190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 10/09/2023] [Indexed: 10/11/2023]
Abstract
Recently, a new layered material, Mn3Si2Te6, was identified to be a semiconductor with nodal-line topological property and ferrimagnetic ground state. In this work, we propose a series of structures, M3Si2Te6(M = alkaline earth and transition metals), and systematically investigate their mechanical, magnetic and electronic properties, and the strain effect to enrich the family of the layered materials for practical applications. We find 13 stable M3Si2Te6, including 5 semiconductors (M = Ca, Sr, Fe, Ru and Os) and 8 metals (M = Sc, Ti, Nb, Ta, Cr, Mo, W and Tc). Two structures (M = Ti and Cr) are antiferromagnetic (AFM), while other structures are non-magnetic (NM). Similar to Mn3Si2Te6, the AFM structures exhibit magnetic anisotropy energies (MAEs) and semiconductors have anisotropic electron effective masses. We further show that compressions along thez-axis can effectively tune the electronic and magnetic properties, such as the semiconductor-metal and NM-AFM transition in Fe3Si2Te6, the two-fold degeneracy of the valence band maximums in Sr3Si2Te6, as well as the reduced MAE for all magnetic structures. These results demonstrate the diverse properties of the layered M3Si2Te6family and provide promising theoretical predictions for the future design of new layered materials.
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Affiliation(s)
- Bowen Li
- Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR 999078, People's Republic of China
| | - Haoyun Bai
- Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR 999078, People's Republic of China
| | - Zhichao Yu
- Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR 999078, People's Republic of China
| | - Yutong Li
- Department of Electromechanical Engineering, Faculty of Science and Technology, University of Macau, Macao SAR 999078, People's Republic of China
| | - Chi Tat Kwok
- Department of Electromechanical Engineering, Faculty of Science and Technology, University of Macau, Macao SAR 999078, People's Republic of China
| | - Wenlin Feng
- School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing 400054, People's Republic of China
| | - Shuangpeng Wang
- Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR 999078, People's Republic of China
| | - Kar Wei Ng
- Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR 999078, People's Republic of China
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6
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Wang Q, Dong XH, Huang L, Ok KM, Lin ZE, Zou GH. Cd 2 Nb 2 Te 4 O 15 : A Novel Pseudo-Aurivillius-Type Tellurite with Unprecedented Nonlinear Optical Properties and Excellent Stability. Small 2023; 19:e2302797. [PMID: 37246267 DOI: 10.1002/smll.202302797] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/16/2023] [Indexed: 05/30/2023]
Abstract
Oxides are emerging candidates for mid-infrared (mid-IR) nonlinear optical (NLO) materials. However, their intrinsically weak second harmonic generation (SHG) effects hinder their further development. A major design challenge is to increase the nonlinear coefficient while maintaining the broad mid-IR transmission and high laser-induced damage threshold (LIDT) of the oxides. In this study, it is reported on a polar NLO tellurite, Cd2 Nb2 Te4 O15 (CNTO), featuring a pseudo-Aurivillius-type perovskite layered structure composed of three types of NLO active groups, including CdO6 octahedra, NbO6 octahedra, and TeO4 seesaws. The uniform orientation of the distorted units induces a giant SHG response that is ≈31 times larger than that of KH2 PO4 , the largest value among all reported metal tellurites. Additionally, CNTO exhibits a large band gap (3.75 eV), a wide optical transparency window (0.33-14.5 µm), superior birefringence (0.12@ 546 nm), high LIDT (23 × AgGaS2 ), and strong acid and alkali resistance, indicating its potential as a promising mid-IR NLO material.
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Affiliation(s)
- Qiang Wang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, P. R. China
| | - Xue-Hua Dong
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, P. R. China
| | - Ling Huang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, P. R. China
| | - Kang-Min Ok
- Department of Chemistry, Sogang University, Seoul, 04107, South Korea
| | - Zhi-En Lin
- College of Chemistry, Sichuan University, Chengdu, 610065, P. R. China
| | - Guo-Hong Zou
- College of Chemistry, Sichuan University, Chengdu, 610065, P. R. China
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7
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Li H, Wang L, Song Y, Wu Y, Zhang H, Du A, He X. Understanding the Insight Mechanism of Chemical-Mechanical Degradation of Layered Co-Free Ni-Rich Cathode Materials: A Review. Small 2023; 19:e2302208. [PMID: 37154228 DOI: 10.1002/smll.202302208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/20/2023] [Indexed: 05/10/2023]
Abstract
Layered Cobalt (Co)-free Nickel (Ni)-rich cathode materials have attracted much attention due to their high energy density and low cost. Still, their further development is hampered by material instability caused by the chemical/mechanical degradation of the material. Although there are numerous doping and modification approaches to improve the stability of layered cathode materials, these approaches are still in the laboratory stage and require further research before commercial application. To fully exploit the potential of layered cathode materials, a more comprehensive theoretical understanding of the underlying issues is necessary, along with active exploration of previously unrevealed mechanisms. This paper presents the phase transition mechanism of Co-free Ni-rich cathode materials, the existing problems, and the state-of-the-art characterization tools employed to study the phase transition. The causes of crystal structure degradation, interfacial instability, and mechanical degradation are elaborated, from the material's crystal structure to its phase transition and atomic orbital splitting. By organizing and summarizing these mechanisms, this paper aims to establish connections among common research problems and to identify future research priorities, thereby facilitating the rapid development of Co-free Ni-rich materials.
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Affiliation(s)
- Hang Li
- School of Automotive Studies, Tongji University, Shanghai, 201804, China
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Li Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Youzhi Song
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Yingqiang Wu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Hao Zhang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Aimin Du
- School of Automotive Studies, Tongji University, Shanghai, 201804, China
| | - Xiangming He
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
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8
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Zheng H, Zhang C, Liu G, Chen R, Guo S. The effect of layer thickness ratio on the drug release behavior of alternating layered composite prepared by layer-multiplying co-extrusion. Front Bioeng Biotechnol 2023; 11:1217938. [PMID: 37425365 PMCID: PMC10326276 DOI: 10.3389/fbioe.2023.1217938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 06/05/2023] [Indexed: 07/11/2023] Open
Abstract
Multi-layered drug delivery (MLDD) system has promising potential to achieve controlled release. However, existing technologies face difficulties in regulating the number of layers and layer-thickness ratio. In our previous works, layer-multiplying co-extrusion (LMCE) technology was applied to regulate the number of layers. Herein, we utilized layer-multiplying co-extrusion technology to modulate the layer-thickness ratio to expand the application of LMCE technology. Four-layered poly (ε-caprolactone)-metoprolol tartrate/poly (ε-caprolactone)-polyethylene oxide (PCL-MPT/PEO) composites were continuously prepared by LMCE technology, and the layer-thickness ratios for PCL-PEO layer and PCL-MPT layer were set to be 1:1, 2:1, and 3:1 just by controlling the screw conveying speed. The in vitro release test indicated that the rate of MPT release increased with decreasing the thickness of the PCL-MPT layer. Additionally, when PCL-MPT/PEO composite was sealed by epoxy resin to eliminate the edge effect, sustained release of MPT was achieved. The compression test confirmed the potential of PCL-MPT/PEO composites as bone scaffolds.
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Affiliation(s)
| | | | | | - Rong Chen
- *Correspondence: Guiting Liu, ; Rong Chen,
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9
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Jeon H, Noh J, Jo M, Joo C, Jo J, Lee C. Layer-by-Layer Engineered Flexible Functional Film Fabrication with Spreadability Control in Roll-to-Roll Manufacturing. Polymers (Basel) 2023; 15:polym15112478. [PMID: 37299278 DOI: 10.3390/polym15112478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 05/17/2023] [Accepted: 05/24/2023] [Indexed: 06/12/2023] Open
Abstract
A roll-to-roll manufacturing system performs printing and coating on webs to mass-produce large-area functional films. The functional film of a multilayered structure is composed of layers with different components for performance improvement. The roll-to-roll system is capable of controlling the geometries of the coating and printing layers using process variables. However, research on geometric control using process variables is limited to single-layer structures only. This study entails the development of a method to proactively control the geometry of the upper coated layer by using the lower-layer coating process variable in the manufacture of a double-coated layer. The correlation between the lower-layer coating process variable and upper coated layer geometry was examined by analyzing the lower-layer surface roughness and spreadability of the upper-layer coating ink. The correlation analysis results demonstrate that tension was the dominant variable in the upper coated layer surface roughness. Additionally, this study found that adjusting the process variable of the lower-layer coating in a double-layered coating process could improve the surface roughness of the upper coating layer by up to 14.9%.
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Affiliation(s)
- Hojin Jeon
- Department of Mechanical Design and Production Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Jaehyun Noh
- Department of Mechanical Design and Production Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Minho Jo
- Department of Mechanical Design and Production Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Changbeom Joo
- Department of Mechanical Engineering, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, NJ 07030, USA
| | - Jeongdai Jo
- Department of Printed Electronics, Korea Institute of Machinery and Materials, 156, Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Republic of Korea
| | - Changwoo Lee
- Department of Mechanical and Aerospace Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
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10
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Sundeev R, Shalimova A, Rogachev S, Chernogorova O, Glezer A, Ovcharov A, Karateev I, Tabachkova N. Structural Aspects of the Formation of Multilayer Composites from Dissimilar Materials upon High-Pressure Torsion. Materials (Basel) 2023; 16:ma16103849. [PMID: 37241476 DOI: 10.3390/ma16103849] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 04/30/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023]
Abstract
A multi-metal composite was consolidated from the Ti50Ni25Cu25 and Fe50Ni33B17 alloys by room-temperature high-pressure torsion (HPT). The structural research methods used in this study were X-ray diffractometry, high-resolution transmission electron microscopy, scanning electron microscopy with an electron microprobe analyzer in the mode of backscattered electrons, and the measurement of indentation hardness and modulus of the composite constituents. The structural aspects of the bonding process have been examined. The method of joining materials using their coupled severe plastic deformation has been established to play a leading role in the consolidation of the dissimilar layers upon HPT.
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Affiliation(s)
- Roman Sundeev
- Department of Nanoelectronics, MIREA-Russian Technological University, Vernadskogo Prospect, 78, 119454 Moscow, Russia
- I.P. Bardin Science Institute for Ferrous Metallurgy, Radio Street, 22/9, 105005 Moscow, Russia
- Department of Physical Metallurgy and Physics of Strength, National University of Science and Technology "MISiS", Leninski Prospect, 4, 119049 Moscow, Russia
| | - Anna Shalimova
- I.P. Bardin Science Institute for Ferrous Metallurgy, Radio Street, 22/9, 105005 Moscow, Russia
| | - Stanislav Rogachev
- Department of Physical Metallurgy and Physics of Strength, National University of Science and Technology "MISiS", Leninski Prospect, 4, 119049 Moscow, Russia
- Baikov Institute of Metallurgy and Materials Science RAS, Leninski Prospect, 49, 119334 Moscow, Russia
| | - Olga Chernogorova
- Baikov Institute of Metallurgy and Materials Science RAS, Leninski Prospect, 49, 119334 Moscow, Russia
| | - Alexander Glezer
- I.P. Bardin Science Institute for Ferrous Metallurgy, Radio Street, 22/9, 105005 Moscow, Russia
| | - Alexey Ovcharov
- National Research Centre "Kurchatov Institute", Akademika Kurchatova Square, 1, 123182 Moscow, Russia
| | - Igor Karateev
- National Research Centre "Kurchatov Institute", Akademika Kurchatova Square, 1, 123182 Moscow, Russia
| | - Natalia Tabachkova
- Department of Physical Metallurgy and Physics of Strength, National University of Science and Technology "MISiS", Leninski Prospect, 4, 119049 Moscow, Russia
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11
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Ambach SJ, Pointner M, Falkai S, Paulmann C, Oeckler O, Schnick W. Combining MN6 Octahedra and PN5 Trigonal Bipyramids in the Mica-like Nitridophosphates MP6N11 (M = Al, In). Angew Chem Int Ed Engl 2023:e202303580. [PMID: 37052069 DOI: 10.1002/anie.202303580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/13/2023] [Accepted: 04/13/2023] [Indexed: 04/14/2023]
Abstract
Layered silicates are a very versatile class of materials with high importance to humanity. The new nitridophosphates MP6N11 (M = Al, In), synthesized from MCl3, P3N5 and NH4N3 in a high-pressure high-temperature reaction at 1100 °C and 8 GPa, show a mica-like layer setup and feature rare nitrogen coordination motifs. The crystal structure of AlP6N11 was elucidated from synchrotron single-crystal diffraction data (space group Cm (no. 8), a = 4.9354(10), b = 8.1608(16), c = 9.0401(18) Å, β = 98.63(3)°), enabling Rietveld refinement of isotypic InP6N11. It is built up from layers of PN4 tetrahedra, PN5 trigonal bipyramids and MN6 octahedra. PN5 trigonal bipyramids have been reported only once and MN6 octahedra are sparsely found in the literature. AlP6N11 was further characterized by energy-dispersive X-ray (EDX), IR and NMR spectroscopy. Despite the vast amount of known layered silicates, there is no isostructural compound to MP6N11 as yet.
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Affiliation(s)
- Sebastian J Ambach
- Ludwig-Maximilians-Universität München Fakultät für Chemie und Pharmazie: Ludwig-Maximilians-Universitat Munchen Fakultat fur Chemie und Pharmazie, Chemistry, Butenandtstr. 5-13, 81377, Munich, GERMANY
| | - Monika Pointner
- Ludwig-Maximilians-Universität München Fakultät für Chemie und Pharmazie: Ludwig-Maximilians-Universitat Munchen Fakultat fur Chemie und Pharmazie, Chemistry, Butenandtstr. 5-13, 81377, Munich, GERMANY
| | - Sophie Falkai
- Ludwig-Maximilians-Universität München Fakultät für Chemie und Pharmazie: Ludwig-Maximilians-Universitat Munchen Fakultat fur Chemie und Pharmazie, Chemistry, Butenandtstr. 5-13, 81377, Munich, GERMANY
| | - Carsten Paulmann
- University of Hamburg: Universitat Hamburg, Institute Mineralogy, Crystallography and Petrography, Grindelallee 48, 20146, Hamburg, GERMANY
| | - Oliver Oeckler
- Leipzig University: Universitat Leipzig, Institute Mineralogy, Scharnhorststraße 20, 04275, Leipzig, GERMANY
| | - Wolfgang Schnick
- Ludwig-Maximilians-Universitat Munchen, Department Chemie, Butenandtstr. 5-13, 81377, München, GERMANY
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12
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Topić E, Rubčić M. Structural Insights into Layered Tetrahalocuprates(II) Based on Small Unsaturated and Cyclic Primary Ammonium Cations. Materials (Basel) 2023; 16:2236. [PMID: 36984117 PMCID: PMC10055728 DOI: 10.3390/ma16062236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/03/2023] [Accepted: 03/08/2023] [Indexed: 06/18/2023]
Abstract
Layered hybrid halometallates represent a promising class of multifunctional materials, yet with many open challenges regarding the interaction between building blocks. In this work, we present a synthetic and analytical methodology for the efficient synthesis and structural analysis of a series of novel tetrahalocuprate(II) hybrids based on small alkylammonium cations. Observed robustness in geometrical motifs provided a platform for crystal structure determination, even from the complex laboratory powder diffraction data. The slight differences in inorganic layer geometry and severe differences in organic bilayer packing are quantified using well-established descriptors for these materials, and dependences of geometric parameters on anion and cation choice are accounted for. Temperature dependence of structural parameters for one of the tetrachlorocuprate hybrids that was chosen as a model unveils a possible geometrical origin of thermochromism in these materials.
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Bertašius P, Plyushch A, Macutkevič J, Banys J, Selskis A, Platnieks O, Gaidukovs S. Multilayered Composites with Carbon Nanotubes for Electromagnetic Shielding Application. Polymers (Basel) 2023; 15. [PMID: 36850335 DOI: 10.3390/polym15041053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/20/2023] [Accepted: 02/17/2023] [Indexed: 02/22/2023] Open
Abstract
Bulk polylactic acid (PLA)/multiwall carbon nanotube (MWCNT) composites were prepared and investigated in wide frequency ranges (20 Hz-1 MHz and 24-40 GHz). It was determined that the percolation threshold in bulk PLA/MWCNT composites is close to 0.2 vol.% MWCNT. However, the best microwave dielectric properties and absorption were observed in composites with 3.0-5.0 vol.% MWCNT. Therefore, for future investigations, we selected layered (laminate) polymeric structures with gradual changes in MWCNT concentration from 0.2 to 8.0 vol.% MWCNT. Two approaches to laminate structure designs were examined and compared: a five-layer composite and a nine-layer composite that included four pure PLA middle layers. The addition of MWCNT enhanced the elastic modulus by up to 1.4-fold and tensile strength by up to 1.2-fold, with the best performance achieved at 5.0 vol.% loading. High microwave shielding was observed for these layered PLA/MWCNT structures with a gradient change in MWCNT concentration (up to 26 dB in both transmission and absorption coefficients) in the broad frequency range (from 24 to 40 GHz). Obtained structures are highly anisotropic, and the absorption coefficient is 2-5 dB higher in the direction of MWCNT concentration increase; however, the transmission coefficient is the same in both directions. The properties of microwave absorption are mainly unaffected by the additional polymeric layers. The absorption of the layered structure is greater than the absorption of single-layer composites with an optimal MWCNT concentration of the same thickness. The proposed laminate structure design is promising in the field of efficient electromagnetic shielding.
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Latif M, Jiang Y, Song J, Kim J. Additively-Manufactured High-Concentration Nanocellulose Composites: Structure and Mechanical Properties. Polymers (Basel) 2023; 15. [PMID: 36771967 DOI: 10.3390/polym15030669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/25/2023] [Accepted: 01/26/2023] [Indexed: 01/31/2023] Open
Abstract
Additive manufacturing technology (AMT) has transformed polymer composites' manufacturing process with its exceptional ability to construct complex products with unique materials, functions, and structures. Besides limiting studies of manufacturing arbitrarily shaped composites using AMT, printed structures with a high concentration of nanocellulose face adhesion issues upon drying, resulting in shape fidelity issues and low mechanical strength. This research demonstrates an economical approach to printing a high-concentration (25.46 wt%) nanocellulose (NC) layer-wise pattern to fabricate structures. Two different composites are fabricated: (1) 3D-printed pure and high-concentration (10, 15, and 20 wt%) polyvinyl-alcohol (PVA)-blended NC structures followed by freeze-drying and impregnation of Epofix resin by varying hardener contents; (2) 3D-printed PVA-blended NC green composites dried at cleanroom conditions (Relative humidity 45%; Temperature 25 °C). Different contents (10, 15, and 20 wt%) of PVA as a crosslinker were blended with NC to assist the printed layers' adhesions. An optimum PVA content of 15 wt% and an Epofix resin with 4 wt% hardener cases showed the highest bending strength of 55.41 ± 3.63 MPa and elastic modulus of 4.25 ± 0.37 GPa. In contrast, the 15 wt% PVA-blended NC cleanroom-dried green composites without resin infusion showed bending strength and elastic modulus of 94.78 ± 3.18 MPa and 9.00 ± 0.27 GPa, reflecting high interface adhesions as confirmed by scanning electron microscope. This study demonstrated that AMT-based nanocellulose composites could be scaled up for commercial use.
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Xu J, Zhu Z, Zhang M, Zhang X, Li Q, You Y, Liu J, Wu Y. Artificially Layered CoSe 2 Nanosheets by a Dual-Templating Strategy for High-Performance Lithium-Sulfur Batteries. ACS Appl Mater Interfaces 2022; 14:47788-47799. [PMID: 36254823 DOI: 10.1021/acsami.2c14293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Owing to the attractive merits of layered transition metal dichalcogenides (LTMDs) with van der Waals interactions, it is significant to modulate electronic structures and endow them with fascinating physiochemical properties by converting a nonlayered metal dichalcogenide into an atomic layered one. Herein, a dual-templating strategy is designed to prepare artificially layered CoSe2 nanosheets on carbon fiber cloth (L-CoSe2/CFC). It is found that not only the nanosheet morphology but also the layered structure is well inherited from the precursor of layered Co(OH)2 nanosheets through a wet-solution ion-exchange approach. The as-prepared L-CoSe2/CFC serves as an efficient multifunctional interlayer to solve the challenges of "shuttling effect" and slow multistep reaction kinetics in lithium-sulfur batteries (LSBs), thus dramatically improving their electrochemical performance. Benefiting from the L-CoSe2 nanosheets with large interlayer spacing, strong chemical adsorption, and superior catalytic activity, L-CoSe2/CFC promotes the anchoring of lithium polysulfides (LiPSs) and their catalytic conversion. Consequently, the L-CoSe2/CFC cell yields a large reversible capacity of 1584 mAh g-1 at 0.2C and a high rate capability of 987 mAh g-1 at 4C. A high areal capacity of 4.38 mAh cm-2 after 100 cycles at 0.2C is achieved for the high-S-loading LSB (4.6 mg cm-2) using the L-CoSe2/CFC interlayer.
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Affiliation(s)
- Jun Xu
- School of Microelectronics, Hefei University of Technology, Hefei230009, P. R. China
| | - Zhiqian Zhu
- School of Microelectronics, Hefei University of Technology, Hefei230009, P. R. China
| | - Maijie Zhang
- School of Microelectronics, Hefei University of Technology, Hefei230009, P. R. China
| | - Xuhui Zhang
- School of Microelectronics, Hefei University of Technology, Hefei230009, P. R. China
| | - Qiang Li
- School of Physics, Hefei University of Technology, Hefei230009, P. R. China
| | - Yu You
- School of Physics and Electronic Information, Huaibei Normal University, Huaibei235000, P. R. China
| | - Jiaqin Liu
- Institute of Industry & Equipment Technology, Hefei University of Technology, Hefei230009, P. R. China
| | - Yucheng Wu
- School of Materials Science and Engineering, Hefei University of Technology, Hefei230009, P. R. China
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Yan F, Bai H, Ge G, Lin J, Zhu K, Li G, Qian J, Shen B, Zhai J, Liu Z. Boosting Energy Storage Performance of Lead-Free Ceramics via Layered Structure Optimization Strategy. Small 2022; 18:e2202575. [PMID: 35908160 DOI: 10.1002/smll.202202575] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/03/2022] [Indexed: 06/15/2023]
Abstract
Owing to the current global scenario of environmental pollution and the energy crisis, the development of new dielectrics using lead-free ceramics for application in advanced electronic and energy storage systems is essential because of the high power density and excellent stability of such ceramics. Unfortunately, most of them have low breakdown strength and/or low maximum polarization, resulting in low energy density and efficiency. To overcome this limitation here, lead-free ceramics comprising a layered structure are designed and fabricated. By optimizing the distribution of the layered structure, a large maximum polarization and high applied electric field (>500 kV cm-1 ) can be achieved; these result in an ultrahigh recoverable energy storage density (≈7 J cm-3 ) and near ideal energy storage efficiency (≈95%). Furthermore, the energy storage performance without obvious deterioration over a broad range of operating frequencies (1-100 Hz), working temperatures (30-160 °C), and fatigue cycles (1-104 ). In addition, the prepared ceramics exhibit extremely high discharge energy density (4.52 J cm-3 ) and power density (405.50 MW cm-3 ). Here, the results demonstrate that the strategy of layered structure design and optimization is promising for enhancing the energy storage performance of lead-free ceramics.
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Affiliation(s)
- Fei Yan
- Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Hairui Bai
- Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Guanglong Ge
- Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Jinfeng Lin
- Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Kun Zhu
- Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Guohui Li
- Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Jin Qian
- Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Bo Shen
- Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Jiwei Zhai
- Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Zhifu Liu
- Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899, China
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Yoo BI, Lee N, Lamichhane B, Bang J, Song HY, Park BC, Lee KH, Kim SG, Kim SW. Identifying the Correlation between Structural Parameters and Anisotropic Magnetic Properties in IMnV Semiconductors: A Possible Room-Temperature Magnetism. Adv Mater 2022; 34:e2200074. [PMID: 35765199 DOI: 10.1002/adma.202200074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 06/22/2022] [Indexed: 06/15/2023]
Abstract
Layer-structured materials are of central importance in a wide range of research fields owing to their unique properties originating from their two dimensionality and anisotropy. Herein, quasi-2D layer-structured IMnV (I: alkali metals and V: pnictogen elements) compounds are investigated, which are potential antiferromagnetic (AFM) semiconductors. Single crystals of IMnV compounds are successfully grown using the self-flux method and their electronic and magnetic properties are analyzed in correlation with structural parameters. Combined with theoretical calculations, the structural analysis indicates that the variation in the bonding angle between VMnV is responsible for the change in the orbital hybridization of Mn and V, predominantly affecting their anisotropic semiconducting properties. Anisotropy in the magnetic properties is also found, where AFM ordering is expected to occur in the in-plane direction, as supported by spin-structure calculations. Furthermore, a possible ferromagnetic (FM) transition is discussed in relation to the vacancy defects. This study provides a candidate material group for AFM and FM spintronics and a basis for exploring magnetic semiconductors in quasi-2D layer-structured systems.
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Affiliation(s)
- Byung Il Yoo
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
- Samsung Electro-mechanics Co., Ltd., Suwon, 16674, Republic of Korea
| | - Nahyun Lee
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Bipin Lamichhane
- Department of Physics & Astronomy and Center for Computational Sciences, Mississippi State University, Mississippi States, MS, 39792, USA
| | - Joonho Bang
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Hyun Yong Song
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Byung Cheol Park
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Kyu Hyoung Lee
- Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Seong-Gon Kim
- Department of Physics & Astronomy and Center for Computational Sciences, Mississippi State University, Mississippi States, MS, 39792, USA
| | - Sung Wng Kim
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
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Abd Aziz AJ, Baharuddin NA, Somalu MR, Muchtar A. Layering Optimization of the SrFe 0.9Ti 0.1O 3-δ-Ce 0.8Sm 0.2O 1.9 Composite Cathode. Molecules 2022; 27:molecules27082549. [PMID: 35458750 PMCID: PMC9030850 DOI: 10.3390/molecules27082549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 04/05/2022] [Accepted: 04/11/2022] [Indexed: 12/02/2022]
Abstract
Cathode thickness plays a major role in establishing an active area for an oxygen reduction reaction in energy converter devices, such as solid oxide fuel cells. In this work, we prepared SrFe0.9Ti0.1O3−δ–Ce0.8Sm0.2O1.9 composite cathodes with different layers (1×, 3×, 5×, 7×, and 9× layer). The microstructural and electrochemical performance of each cell was then explored through scanning electron microscopy and electrochemical impedance spectroscopy (EIS). EIS analysis showed that the area-specific resistance (ASR) decreased from 0.65 Ωcm2 to 0.12 Ωcm2 with the increase in the number of layers from a 1× to a 7×. However, the ASR started to slightly increase at the 9× layer to 2.95 Ωcm2 due to a higher loss of electrode polarization resulting from insufficient gas diffusion and transport. Therefore, increasing the number of cathode layers could increase the performance of the cathode by enlarging the active area for the reaction up to the threshold point.
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Affiliation(s)
- Azreen Junaida Abd Aziz
- Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (A.J.A.A.); (M.R.S.); (A.M.)
| | - Nurul Akidah Baharuddin
- Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (A.J.A.A.); (M.R.S.); (A.M.)
- Correspondence: ; Tel.: +60-3891-18538
| | - Mahendra Rao Somalu
- Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (A.J.A.A.); (M.R.S.); (A.M.)
| | - Andanastuti Muchtar
- Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (A.J.A.A.); (M.R.S.); (A.M.)
- Department of Mechanical & Manufacturing Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia
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19
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Lawrence MJ, Celorrio V, Sargeant E, Huang H, Rodríguez-López J, Zhu Y, Gu M, Russell AE, Rodriguez P. Insight into the Activity and Selectivity of Nanostructured Copper Titanates during Electrochemical Conversion of CO 2 at Neutral pH via In Situ X-ray Absorption Spectroscopy. ACS Appl Mater Interfaces 2022; 14:2742-2753. [PMID: 34982523 DOI: 10.1021/acsami.1c19298] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The electrochemical conversion of carbon dioxide (CO2) to useful chemical fuels is a promising route toward the achievement of carbon neutral and carbon negative energy technologies. Copper (Cu)- and Cu oxide-derived surfaces are known to electrochemically convert CO2 to high-value and energy-dense products. However, the nature and stability of oxidized Cu species under reaction conditions are the subject of much debate in the literature. Herein, we present the synthesis and characterization of copper-titanate nanocatalysts, with discrete Cu-O coordination environments, for the electrochemical CO2 reduction reaction (CO2RR). We employ real-time in situ X-ray absorption spectroscopy (XAS) to monitor Cu species under neutral-pH CO2RR conditions. Combination of voltammetry and on-line electrochemical mass spectrometry with XAS results demonstrates that the titanate motif promotes the retention of oxidized Cu species under reducing conditions for extended periods, without itself possessing any CO2RR activity. Additionally, we demonstrate that the specific nature of the Cu-O environment and the size of the catalyst dictate the long-term stability of the oxidized Cu species and, subsequently, the product selectivity.
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Affiliation(s)
- Matthew J Lawrence
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | - Veronica Celorrio
- Diamond Light Source Ltd, Diamond House, Harwell Campus, Didcot OX11 0DE, U.K
| | - Elizabeth Sargeant
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | - Haoliang Huang
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Joaquín Rodríguez-López
- Department of Chemistry, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Yuanmin Zhu
- School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Meng Gu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Andrea E Russell
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Paramaconi Rodriguez
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
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20
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Wagner HD. Hierarchical Interfaces as Fracture Propagation Traps in Natural Layered Composites. Materials (Basel) 2021; 14:6855. [PMID: 34832257 DOI: 10.3390/ma14226855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 11/17/2022]
Abstract
Compared with their monolithic version, layered structures are known to be beneficial in the design of materials, especially ceramics, providing enhanced fracture toughness, mechanical strength, and overall reliability. This was proposed in recent decades and extensively studied in the engineering literature. The source of the property enhancement is the ability of layered structures to deflect and often arrest propagating cracks along internal interfaces between layers. Similar crack-stopping abilities are found in nature for a broad range of fibrillary layered biological structures. Such abilities are largely governed by complex architectural design solutions and geometries, which all appear to involve the presence of various types of internal interfaces at different structural levels. The simultaneous occurrence at several scales of different types of interfaces, designated here as hierarchical interfaces, within judiciously designed layered composite materials, is a powerful approach that constrains cracks to bifurcate and stop. This is concisely described here using selected biological examples, potentially serving as inspiration for alternative designs of engineering composites.
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21
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Fu H, Liu D, Yu Y, Yang Z, Zhang Y, Wang B, Niu Y, Jia S. Highly aligned welding of ultrathin graphene layer to robust carbon nanotube film for significantly enhanced thermal conductivity. Nanotechnology 2021; 32:495710. [PMID: 34433147 DOI: 10.1088/1361-6528/ac2100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 08/24/2021] [Indexed: 06/13/2023]
Abstract
Carbon nanotube (CNT) films have demonstrated great potential for highly efficient thermal management materials. However, how to enable a combined feature of excellent thermal conductivity and structural robustness, which is crucial for the high-performance realization, still remains challenging. Herein, an effective and facile strategy to solve the problem was proposed by developing a graphene (G)/CNT film with highly aligned welding of ultrathin G layer to robust CNT film. The unique architectural features of the obtained composite film enabled a high tensile strength (116 MPa) and electric conductivity (1.7 × 103S cm-1). Importantly, the thermal conductivity was significantly improved compared to neat CNT film, and reached as high as 174 W m-1K-1. In addition, the G/CNT film featured a superior electromagnetic shielding performance. This work provides useful guidelines for designing and fabricating the composite CNT film with prominent thermal conductivity, as well as excellent mechanical and electrical properties.
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Affiliation(s)
- Huili Fu
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, People's Republic of China
| | - Dapeng Liu
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, People's Republic of China
| | - Yingying Yu
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, People's Republic of China
| | - Zhengpeng Yang
- Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, People's Republic of China
| | - Yongyi Zhang
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, People's Republic of China
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, People's Republic of China
- Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials, Suzhou Institute of Nano-Tech and Nano-Bionics, Nanchang, Chinese Academy of Sciences, Nanchang 330200, People's Republic of China
| | - Bin Wang
- Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials, Suzhou Institute of Nano-Tech and Nano-Bionics, Nanchang, Chinese Academy of Sciences, Nanchang 330200, People's Republic of China
| | - Yutao Niu
- Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials, Suzhou Institute of Nano-Tech and Nano-Bionics, Nanchang, Chinese Academy of Sciences, Nanchang 330200, People's Republic of China
| | - Shengmin Jia
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, People's Republic of China
- Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, People's Republic of China
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22
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Lohmus R, Kallakas H, Tuhkanen E, Gulik V, Kiisk M, Saal K, Kalamees T. The Effect of Prestressing and Temperature on Tensile Strength of Basalt Fiber-Reinforced Plywood. Materials (Basel) 2021; 14:ma14164701. [PMID: 34443222 PMCID: PMC8399507 DOI: 10.3390/ma14164701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 08/03/2021] [Accepted: 08/16/2021] [Indexed: 11/16/2022]
Abstract
The reinforcement of plywood is demonstrated by laminating pretensioned basalt fibers between veneer sheets, to fabricate so-called prestressed plywood. Belt type basalt fibers bearing a specific adhesion promoting silane sizing were aligned between veneer sheets with 20 mm spacing and were pretensioned at 150 N. Three-layer plywood samples were prepared and tested for tensile strength at room temperature and at 150 °C. The room temperature tensile tests revealed a 35% increase in tensile strength for prestressed plywood compared to that of the conventional specimen. The reinforcement effect deteriorated at 150 °C but was restored upon cooling to room temperature. The deterioration is attributed to the weakening of bonding between the basalt fibers and phenolic resin matrix at elevated temperatures due to the softening of the resin.
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Affiliation(s)
- Rynno Lohmus
- Institute of Physics, University of Tartu, W Ostwaldi 1, 50090 Tartu, Estonia; (V.G.); (M.K.); (K.S.)
- Correspondence:
| | - Heikko Kallakas
- Tallinn University of Technology, Ehitajate Tee 5, 12616 Tallinn, Estonia; (H.K.); (E.T.); (T.K.)
| | - Eero Tuhkanen
- Tallinn University of Technology, Ehitajate Tee 5, 12616 Tallinn, Estonia; (H.K.); (E.T.); (T.K.)
| | - Volodymyr Gulik
- Institute of Physics, University of Tartu, W Ostwaldi 1, 50090 Tartu, Estonia; (V.G.); (M.K.); (K.S.)
| | - Madis Kiisk
- Institute of Physics, University of Tartu, W Ostwaldi 1, 50090 Tartu, Estonia; (V.G.); (M.K.); (K.S.)
| | - Kristjan Saal
- Institute of Physics, University of Tartu, W Ostwaldi 1, 50090 Tartu, Estonia; (V.G.); (M.K.); (K.S.)
| | - Targo Kalamees
- Tallinn University of Technology, Ehitajate Tee 5, 12616 Tallinn, Estonia; (H.K.); (E.T.); (T.K.)
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Coy E, Iatsunskyi I, Colmenares JC, Kim Y, Mrówczyński R. Polydopamine Films with 2D-like Layered Structure and High Mechanical Resilience. ACS Appl Mater Interfaces 2021; 13:23113-23120. [PMID: 33969981 PMCID: PMC8289185 DOI: 10.1021/acsami.1c02483] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 04/28/2021] [Indexed: 05/14/2023]
Abstract
Highly oriented, layered, and mechanically resilient films of polydopamine (PDA) have been synthesized from the air/water interface. The films show a unique layered structure, as shown by scanning and transmission electron studies (SEM/TEM) and X-ray diffraction analysis (XRD), which resemble that of 2D layered materials. The films exhibit a composition typical of PDA-based materials, as evidenced by X-ray photoelectron spectroscopy (XPS); moreover, the samples present the distinctive resonance modes of PDA-based nanomaterials in Raman and infrared spectroscopy (FTIR) experiments. The presence of highly ordinated 3-4 protomolecule stacking, taking place at the air/water interface, with a unique eumelanin-like supramolecular arrangement is presented. Moreover, the films show superior mechanical resilience with E = 13 ± 4 GPa and H = 0.21 ± 0.03 GPa, as revealed by nanoindentation experiments, making them highly resilient and easily transferable. Finally, the ordering induced by the interface opens many possibilities for further studies, including those regarding the supramolecular structure on PDA due to their similarity to 2D layered materials.
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Affiliation(s)
- Emerson Coy
- NanoBioMedical
Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland
| | - Igor Iatsunskyi
- NanoBioMedical
Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland
| | - Juan Carlos Colmenares
- Institute
of Physical Chemistry, Polish Academy of
Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Yeonho Kim
- Research
Institute of Basic Sciences, Incheon National
University, Incheon 22012, Republic of Korea
| | - Radosław Mrówczyński
- Faculty
of Chemistry, Adam Mickiewicz University, ul. Uniwersytet Poznańskiego
8, 61-614 Poznań, Poland
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24
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Liu Q, Liu XC, Zhang J, Liu KF, Xia SQ. Enhanced Thermoelectric Performance of LiZnSb-Alloyed CaZn 0.4Ag 0.2Sb by Band Engineering. ACS Appl Mater Interfaces 2021; 13:17809-17816. [PMID: 33830727 DOI: 10.1021/acsami.1c01818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
LiZnSb is a Zintl phase that has been predicted to be a good material in thermoelectric applications for a long time. However, experimental work indicated that the synthesized LiZnSb materials were p type, and their maximum zT value is only 0.08 at 525 K. CaZn0.4Ag0.2Sb, which belongs to the LiGaGe structure type and is also closely associated with the LiZnSb structure, did show high zT plateaus in a wide range of temperature, with the mixed transition metal Zn/Ag sites regulated. By comparing their crystallographic and electronic band structures, it is evident that the interlayered distances in both compounds have a great effect on the regulation of the corresponding electrical transport properties. When alloying CaZn0.4Ag0.2Sb with LiZnSb, solid solutions form within a specific range, which led to a marked enhancement in the Seebeck coefficient through the orbital alignment and carrier concentration optimization. In addition, a low thermal conductivity was obtained owing to the reduced electronic component. With the above optimization, a maximum zT value of ∼1.3 can be realized for (CaZn0.4Ag0.2Sb)0.87(LiZnSb)0.13 at 873 K, more than twice that of the pristine CaZn0.4Ag0.2Sb and about 10-fold compared to that of LiZnSb. This work may shed new light on the optimization of thermoelectric properties based on Zintl phases, for which the crystal structures are usually very complicated and a direct correlation between the structures and properties is difficult to make.
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Affiliation(s)
- Qian Liu
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, Shandong 250100, People's Republic of China
| | - Xiao-Cun Liu
- School of Civil Engineering, Shandong Jiaotong University, Jinan, Shandong 250300, People's Republic of China
| | - Jian Zhang
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, Shandong 250100, People's Republic of China
| | - Ke-Feng Liu
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, Shandong 250100, People's Republic of China
| | - Sheng-Qing Xia
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, Shandong 250100, People's Republic of China
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25
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Li XL, Wang T, Yuan Y, Yue XY, Wang QC, Wang JY, Zhong J, Lin RQ, Yao Y, Wu XJ, Yu XQ, Fu ZW, Xia YY, Yang XQ, Liu T, Amine K, Shadike Z, Zhou YN, Lu J. Whole-Voltage-Range Oxygen Redox in P2-Layered Cathode Materials for Sodium-Ion Batteries. Adv Mater 2021; 33:e2008194. [PMID: 33645858 DOI: 10.1002/adma.202008194] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 01/09/2021] [Indexed: 06/12/2023]
Abstract
Oxygen-redox of layer-structured metal-oxide cathodes has drawn great attention as an effective approach to break through the bottleneck of their capacity limit. However, reversible oxygen-redox can only be obtained in the high-voltage region (usually over 3.5 V) in current metal-oxide cathodes. Here, we realize reversible oxygen-redox in a wide voltage range of 1.5-4.5 V in a P2-layered Na0.7 Mg0.2 [Fe0.2 Mn0.6 □0.2 ]O2 cathode material, where intrinsic vacancies are located in transition-metal (TM) sites and Mg-ions are located in Na sites. Mg-ions in the Na layer serve as "pillars" to stabilize the layered structure during electrochemical cycling, especially in the high-voltage region. Intrinsic vacancies in the TM layer create the local configurations of "□-O-□", "Na-O-□" and "Mg-O-□" to trigger oxygen-redox in the whole voltage range of charge-discharge. Time-resolved techniques demonstrate that the P2 phase is well maintained in a wide potential window range of 1.5-4.5 V even at 10 C. It is revealed that charge compensation from Mn- and O-ions contributes to the whole voltage range of 1.5-4.5 V, while the redox of Fe-ions only contributes to the high-voltage region of 3.0-4.5 V. The orphaned electrons in the nonbonding 2p orbitals of O that point toward TM-vacancy sites are responsible for reversible oxygen-redox, and Mg-ions in Na sites suppress oxygen release effectively.
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Affiliation(s)
- Xun-Lu Li
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Tian Wang
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Yifei Yuan
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Xin-Yang Yue
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Qin-Chao Wang
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Jun-Yang Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Jun Zhong
- Institute of Functional Nano & Soft Materials, Soochow University, Suzhou, 215123, P. R. China
| | - Ruo-Qian Lin
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Yuan Yao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Xiao-Jing Wu
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Xi-Qian Yu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Zheng-Wen Fu
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Yong-Yao Xia
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Xiao-Qing Yang
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Tongchao Liu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Khalil Amine
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Zulipiya Shadike
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Yong-Ning Zhou
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
| | - Jun Lu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
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26
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Kopnin EM. Layered Cuprates Containing Flat Fragments: High-Pressure Synthesis, Crystal Structures and Superconducting Properties. Molecules 2021; 26:1862. [PMID: 33806143 PMCID: PMC8037682 DOI: 10.3390/molecules26071862] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/23/2021] [Accepted: 03/23/2021] [Indexed: 11/16/2022] Open
Abstract
High-pressure synthesis and crystal structures of the homologous series AuBa2(Ca,Ln)n-1CunO2n+3 (n = 1-4; Ln = rare-earth cations) are described. Their crystal structures and superconducting properties are compared with the corresponding members of the Hg-homologous series. Numerous cuprates containing flat structural fragments (CuO4, CO3 and BO3) synthesized mainly at high pressure are compared in terms of structural peculiarities and superconducting properties. Importance and future prospects of high-pressure application for the preparation of new superconducting oxides are discussed.
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Affiliation(s)
- Evgeny M Kopnin
- Pirelli Tyre SpA, Via Piero e Alberto Pirelli, 25, I-20126 Milan, Italy
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27
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Watanabe K, Imai H, Oaki Y. Solid-State Low-Temperature Thermoresponsive and Reversible Color Changes of Conjugated Polymer in Layered Structure: Beyond Infrared Thermography. Small 2020; 16:e2004586. [PMID: 32939961 DOI: 10.1002/smll.202004586] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Indexed: 06/11/2023]
Abstract
Emergence of thermoresponsive and reversible color changes at low temperature is a challenging target. In general, it is not easy to induce sufficient dynamic motion of rigid molecules including chromophore at a lower temperature. The present work shows unusually low-temperature color-change properties originating from the dynamic motion of rigid conjugated polymer in solid state. The layered composites of polydiacetylene (PDA) and guest l-arginine (L-Arg) (PDA-(L-Arg)) exhibit temperature-responsive gradual color changes with reversibility in the range of 123-333 K in solid crystalline state. The dynamic properties are induced by gradual and reversible distortion of the π-conjugated main chain in response to temperature. The tuned flexibility of the layered structure facilitates motion of the rigid π-conjugated molecule at low temperature. The PDA-(L-Arg)-coated substrates are applied to visualization and quantification of 2D and 3D temperature distributions generated by cooling with liquid nitrogen. These thermographic devices afford to image lower temperature range than typical infrared thermography. The present work indicates potentials of layered architectures with tunable flexibility for emergence of dynamic properties.
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Affiliation(s)
- Kei Watanabe
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Hiroaki Imai
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Yuya Oaki
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
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28
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Lyapin A, Beskopylny A, Meskhi B. Structural Monitoring of Underground Structures in Multi-Layer Media by Dynamic Methods. Sensors (Basel) 2020; 20:s20185241. [PMID: 32937995 PMCID: PMC7571194 DOI: 10.3390/s20185241] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/04/2020] [Accepted: 09/10/2020] [Indexed: 11/16/2022]
Abstract
The actual problem of structural monitoring and modeling of dynamic response from buried building is considered in the framework of arbitrary dynamic load. The results can be used for designing underground transport constructions, crossings, buried reservoirs and foundations. In existing methods, the system of sensors that register the response to a dynamic action does not allow for effective interpretation of the signal without understanding the dynamic features and resonance phenomena. The analytical and numerical solution of the problem of the dynamics of a buried object in a layered medium is considered. A multilayer half-space is a set of rigidly interconnected layers characterized by elastic properties. At a distance, an arbitrary dynamic load acts on the half-space, which causes oscillations in the embedded structure, and the sensor system registers the response. The problem of assessing the dynamic stress-strain state (DSSS) is solved using Fourier transforms with the principle of limiting absorption. As an example, the behavior of an embedded massive structure of an underground pedestrian crossing under the influence of a dynamic surface source on a multilayer medium is considered, as well as instrumental support of the sensor system. The solution in the form of stress, strain and displacement fields is obtained and compared with the experimental data. The frequency-dependent characteristics of the system are determined and the possibility of determining the DSSS by a shock pulse is shown.
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Affiliation(s)
- Alexandr Lyapin
- Department of Information Systems in Construction, Faculty of IT-Systems and Technologies, Don State Technical University, Gagarin, 1, Rostov-on-Don 344000, Russia;
| | - Alexey Beskopylny
- Department of Transport Systems, Faculty of Roads and Transport Systems, Don State Technical University, Gagarin, 1, Rostov-on-Don 344000, Russia
- Correspondence: ; Tel.: +7-86-3273-8454
| | - Besarion Meskhi
- Department of Life Safety and Environmental Protection, Faculty of Life Safety and Environmental Engineering, Don State Technical University, Gagarin, 1, Rostov-on-Don 344000, Russia;
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29
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Awrejcewicz J, Pavlov SP, Krysko AV, Zhigalov MV, Bodyagina KS, Krysko VA. Decreasing Shear Stresses of the Solder Joints for Mechanical and Thermal Loads by Topological Optimization. Materials (Basel) 2020; 13:ma13081862. [PMID: 32326585 PMCID: PMC7216155 DOI: 10.3390/ma13081862] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 04/03/2020] [Accepted: 04/08/2020] [Indexed: 11/23/2022]
Abstract
A methodology for obtaining the optimal structure and distribution for the gradient properties of a material in order to reduce the stress level in a soldered joint was constructed. The developed methodology was based on a combination of topological optimization methods (the moving asymptotes method) and the finite elements method; it was first implemented to solve problems of optimizing soldered joints. Using the proposed methodology, a number of problems were solved, allowing one to obtain optimal structural characteristics, in which a decrease in stress is revealed. Designing compounds using this technique will provide more robust designs. The proposed technique can be applied to a wide class of practical problems.
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Affiliation(s)
- Jan Awrejcewicz
- Department of Automation, Biomechanics and Mechatronics, Lodz University of Technology, 1/15 Stefanowskiego Str., 90-924 Łódź, Poland
- Correspondence: ; Tel.: +(042)-631-23-78
| | - Sergey P. Pavlov
- Department of Mathematics and Modelling, Saratov State Technical University, Politehnicheskaya, 77, Saratov 410054, Russian; (S.P.P.); (M.V.Z.); (K.S.B.); (V.A.K.)
| | - Anton V. Krysko
- Department of Applied Mathematics and Systems Analysis, Saratov State Technical University, Politehnicheskaya 77, Saratov 410054, Russian;
| | - Maxim V. Zhigalov
- Department of Mathematics and Modelling, Saratov State Technical University, Politehnicheskaya, 77, Saratov 410054, Russian; (S.P.P.); (M.V.Z.); (K.S.B.); (V.A.K.)
| | - Kseniya S. Bodyagina
- Department of Mathematics and Modelling, Saratov State Technical University, Politehnicheskaya, 77, Saratov 410054, Russian; (S.P.P.); (M.V.Z.); (K.S.B.); (V.A.K.)
| | - Vadim A. Krysko
- Department of Mathematics and Modelling, Saratov State Technical University, Politehnicheskaya, 77, Saratov 410054, Russian; (S.P.P.); (M.V.Z.); (K.S.B.); (V.A.K.)
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30
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Liu Y, Deng W, Meng Z, Wong WY. A Tetrakis(terpyridine) Ligand-Based Cobalt(II) Complex Nanosheet as a Stable Dual-Ion Battery Cathode Material. Small 2020; 16:e1905204. [PMID: 32162776 DOI: 10.1002/smll.201905204] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 02/06/2020] [Indexed: 06/10/2023]
Abstract
Inspired by the flexibility of the bottom-up approach in terms of selecting molecular components and thus tailoring functionalities, a terpyridine derivative (1,2,4,5-tetrakis(4-(2,2':6',2″-terpyridyl)phenyl)benzene) (Tetra-tpy) is synthesized and coordinated with Co(II) ion to self-assemble into a nanosheet Co-sheet by a facile interface-assisted synthesis. The bis(terpyridine)-Co(II) complex nanosheet formed not only shows good stability, but also features the layered structure and rich electrochemical activity inherited from the embedded Co(terpyridine)2 motif. Thus, Co-sheet can serve as a cathode material for a dual-ion battery prototype, which exhibits a high utilization of redox-active sites, good cycling stability, and rate capability, thus expanding the potential application of this kind of easily prepared metal-complex nanosheets in the field of energy storage.
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Affiliation(s)
- Yurong Liu
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, 518057, P. R. China
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Hom, Hong Kong, P. R. China
- Institute of Molecular Functional Materials and Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, P. R. China
| | - Wenwen Deng
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Hom, Hong Kong, P. R. China
| | - Zhengong Meng
- Institute of Molecular Functional Materials and Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, P. R. China
| | - Wai-Yeung Wong
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, 518057, P. R. China
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Hom, Hong Kong, P. R. China
- Institute of Molecular Functional Materials and Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, P. R. China
- Hong Kong Baptist University Institute of Research and Continuing Education, Shenzhen Virtual University Park, Shenzhen, 518057, P. R. China
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31
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Kramár S, Trcala M, Chitbanyong K, Král P, Puangsin B. Basalt-Fiber-Reinforced Polyvinyl Acetate Resin: A Coating for Ductile Plywood Panels. Materials (Basel) 2019; 13:E49. [PMID: 31861838 DOI: 10.3390/ma13010049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 12/10/2019] [Accepted: 12/17/2019] [Indexed: 11/16/2022]
Abstract
The aim of this study was to create a reinforced composite wood-based panel that would be leaned towards the environment Plywood was used as a core material and fiber-reinforced polymer was used as a reinforcement. Conventional resin for the fiber-reinforced polymer was substituted with polyvinyl acetate (PVAC), which has several advantages, such as a lower price, easier handling, and better degradability. The second chosen component, basalt fiber, is cost attractive and environmentally friendly. The combination of one and two layers of fabric with three fiber fractions and 4 mm thick plywood was investigated. The best results were achieved with two layers of fabric and the highest fiber fraction. The improvements of the ultimate bending load and bending stiffness of the plywood in the perpendicular direction were 305% and 325%, respectively. The ultimate load and stiffness of the parallel direction were improved by 31% and 35%, respectively. However, specimens always failed in the compressional zone. The highest reinforcing effect was found with the impact test: The energy required to fracture specimens increased by 4213% and 6150% for one and two layers of fabric, respectively. In conclusion, specimens exhibited high ductility due to the PVAC and basalt fiber. The amount of work and energy required to cause fractures was extensive.
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32
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He L, Gan Z, Xia N, Liao L, Wu Z. Alternating Array Stacking of Ag 26 Au and Ag 24 Au Nanoclusters. Angew Chem Int Ed Engl 2019; 58:9897-9901. [PMID: 31070836 DOI: 10.1002/anie.201900831] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 04/23/2019] [Indexed: 01/06/2023]
Abstract
An assembly strategy for metal nanoclusters using electrostatic interactions with weak interactions, such as C-H⋅⋅⋅π and π⋅⋅⋅π interactions in which cationic [Ag26 Au(2-EBT)18 (PPh3 )6 ]+ and anionic [Ag24 Au(2-EBT)18 ]- nanoclusters gather and assemble in an unusual alternating array stacking structure is presented. [Ag26 Au(2-EBT)18 (PPh3 )6 ]+ [Ag24 Au(2-EBT)18 ]- is a new compound type, a double nanocluster ion compound (DNIC). A single nanocluster ion compound (SNIC) [PPh4 ]+ [Ag24 Au(2-EBT)18 ]- was also synthesized, having a k-vector-differential crystallographic arrangement. [PPh4 ]+ [Ag24 Au(2,4-DMBT)18 ]- adopts a different assembly mode from both [Ag26 Au(2-EBT)18 (PPh3 )6 ]+ [Ag24 Au(2-EBT)18 ]- and [PPh4 ]+ [Ag24 Au(2-EBT)18 ]- . Thus, the striking packing differences of [Ag26 Au(2-EBT)18 (PPh3 )6 ]+ [Ag24 Au(2-EBT)18 ]- , [PPh4 ]+ [Ag24 Au(2-EBT)18 ]- and the existing [PPh4 ]+ [Ag24 Au(2,4-DMBT)18 ]- from each other indicate the notable influence of ligands and counterions on the self-assembly of nanoclusters.
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Affiliation(s)
- Lizhong He
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China.,Institute of Physical Science and Information Technology, Anhui University, Hefei, 230031, P. R. China.,University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Zibao Gan
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China.,Institute of Physical Science and Information Technology, Anhui University, Hefei, 230031, P. R. China
| | - Nan Xia
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China.,Institute of Physical Science and Information Technology, Anhui University, Hefei, 230031, P. R. China
| | - Lingwen Liao
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China.,Institute of Physical Science and Information Technology, Anhui University, Hefei, 230031, P. R. China
| | - Zhikun Wu
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China.,Institute of Physical Science and Information Technology, Anhui University, Hefei, 230031, P. R. China
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33
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Yan Z, Tang L, Huang Y, Hua W, Wang Y, Liu R, Gu Q, Indris S, Chou SL, Huang Y, Wu M, Dou SX. A Hydrostable Cathode Material Based on the Layered P2@P3 Composite that Shows Redox Behavior for Copper in High-Rate and Long-Cycling Sodium-Ion Batteries. Angew Chem Int Ed Engl 2019; 58:1412-1416. [PMID: 30480349 DOI: 10.1002/anie.201811882] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 11/19/2018] [Indexed: 11/06/2022]
Abstract
Low-cost layered oxides free of Ni and Co are considered to be the most promising cathode materials for future sodium-ion batteries. Biphasic Na0.78 Cu0.27 Zn0.06 Mn0.67 O2 obtained via superficial atomic-scale P3 intergrowth with P2 phase induced by Zn doping, consisting of inexpensive transition metals, is a promising cathode for sodium-ion batteries. The P3 phase as a covering layer in this composite shows not only in excellent electrochemical performance but also its tolerance to moisture. The results indicate that partial Zn substitutes can effectively control biphase formation for improving the structural/electrochemical stability as well as the ionic diffusion coefficient. Based on in situ synchrotron X-ray diffraction coupled with electron-energy-loss spectroscopy, a possible Cu2+/3+ redox reaction mechanism has now been revealed.
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Affiliation(s)
- Zichao Yan
- Institute for Superconducting and Electronic Materials, University of Wollongong, Innovation Campus, Squires Way, North Wollongong, NSW, 2522, Australia
| | - Liang Tang
- Shanghai Institute of Applied Radiation, Shanghai University, Shanghai, 200444, China
| | - Yangyang Huang
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Weibo Hua
- Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Yong Wang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Rong Liu
- SIMS Lab Manager, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Qinfen Gu
- Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria, 3168, Australia
| | - Sylvio Indris
- Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Shu-Lei Chou
- Institute for Superconducting and Electronic Materials, University of Wollongong, Innovation Campus, Squires Way, North Wollongong, NSW, 2522, Australia
| | - Yunhui Huang
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Minghong Wu
- Shanghai Institute of Applied Radiation, Shanghai University, Shanghai, 200444, China
| | - Shi-Xue Dou
- Institute for Superconducting and Electronic Materials, University of Wollongong, Innovation Campus, Squires Way, North Wollongong, NSW, 2522, Australia
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Li H, Zhao Q, Liu BM, Zhang JY, Li ZY, Guo SQ, Ma JP, Kuroiwa Y, Moriyoshi C, Zheng LR, Sun HT. Transformation of Perovskite BaBiO 3 into Layered BaBiO 2.5 Crystals Featuring Unusual Chemical Bonding and Luminescence. Chemistry 2018; 24:8875-8882. [PMID: 29655241 DOI: 10.1002/chem.201801257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 04/09/2018] [Indexed: 11/09/2022]
Abstract
Engineering oxygen coordination environments of cations in oxides has received intense interest thanks to the opportunities for the discovery of novel oxides with unusual properties. Herein, the synthesis of stoichiometric layered BaBiO2.5 by a nontopotactic phase transformation of perovskite BaBiO3 is presented. By analyzing the synchrotron X-ray diffraction data by the maximum-entropy method/Rietveld technique, it was found that Bi is involved in an unusual chemical bonding situation with four oxygen atoms featuring one ionic bond and three covalent bonds, which results in an asymmetric coordination geometry. Photophysical characterization revealed that this peculiar structure shows near-infrared luminescence differing from that of conventional Bi-containing compounds. Experimental and theoretical results led to the proposal of an excitonic nature of the luminescence. This work highlights that synthesizing materials with uncommon Bi-O bonding and Bi coordination geometry provides a pathway to the discovery of systems with new functionalities. This could inspire interest in the exploration of a range of materials containing heavier p-block elements with prospects for finding systems with unusual properties.
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Affiliation(s)
- Hong Li
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China
| | - Qing Zhao
- Department of Physical Science, Hiroshima University, Higashihiroshima, Hiroshima, 739-8526, Japan
| | - Bo-Mei Liu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China
| | - Jun-Ying Zhang
- Department of Physics, Beihang University, Beijing, 100191, P.R. China
| | - Zhi-Yong Li
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China
| | - Shao-Qiang Guo
- Department of Physics, Beihang University, Beijing, 100191, P.R. China
| | - Ju-Ping Ma
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China
| | - Yoshihiro Kuroiwa
- Department of Physical Science, Hiroshima University, Higashihiroshima, Hiroshima, 739-8526, Japan
| | - Chikako Moriyoshi
- Department of Physical Science, Hiroshima University, Higashihiroshima, Hiroshima, 739-8526, Japan
| | - Li-Rong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Hong-Tao Sun
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China
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35
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Tsai CY, Lin SY, Tsai HC. Butyl Rubber Nanocomposites with Monolayer MoS₂ Additives: Structural Characteristics, Enhanced Mechanical, and Gas Barrier Properties. Polymers (Basel) 2018; 10:polym10030238. [PMID: 30966273 PMCID: PMC6414882 DOI: 10.3390/polym10030238] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 02/22/2018] [Accepted: 02/24/2018] [Indexed: 01/19/2023] Open
Abstract
Emerging two-dimensional (2D) materialsm, such as molybdenum disulfide (MoS2), offer opportunities to tailor the mechanical and gas barrier properties of polymeric materials. In this study, MoS2 was exfoliated to monolayers by modification with ethanethiol and nonanethiol. The thicknesses of resulting MoS2 monolayers were 0.7 nm for MoS2-ethanethiol and 1.1 nm for MoS2-nonanethiol. MoS2 monolayers were added to chlorobutyl rubber to prepare MoS2-butyl rubber nanocomposites at concentrations of 0.5, 1, 3, and 5 phr. The tensile stress showed a maximum enhancement of about 30.7% for MoS2-ethanethiol-butyl rubber and 34.8% for MoS2-nonanethiol-butyl rubber when compared to pure chlorobutyl rubber. In addition, the gas barrier properties were increased by 53.5% in MoS2-ethanethiol-butyl rubber and 49.6% in MoS2-nonanethiol-butyl rubber. MoS2 nanosheets thus enhanced the mechanical and gas barrier properties of chlorobutyl rubber. The nanocomposites that are presented here may be used to manufacture pharmaceutical stoppers with high mechanical and gas barrier properties.
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Affiliation(s)
- Chi-Yang Tsai
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
| | - Shuian-Yin Lin
- Industrial Technology Research Institute, Biomedical Technology and Device Research Laboratories, Hsinchu 31057, Taiwan.
| | - Hsieh-Chih Tsai
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
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36
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Wang Q, Hu E, Pan Y, Xiao N, Hong F, Fu Z, Wu X, Bak S, Yang X, Zhou Y. Utilizing Co 2+/Co 3+ Redox Couple in P2-Layered Na 0.66Co 0.22Mn 0.44Ti 0.34O 2 Cathode for Sodium-Ion Batteries. Adv Sci (Weinh) 2017; 4:1700219. [PMID: 29201619 PMCID: PMC5700635 DOI: 10.1002/advs.201700219] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 06/03/2017] [Indexed: 05/29/2023]
Abstract
Developing sodium-ion batteries for large-scale energy storage applications is facing big challenges of the lack of high-performance cathode materials. Here, a series of new cathode materials Na0.66Co x Mn0.66-x Ti0.34O2 for sodium-ion batteries are designed and synthesized aiming to reduce transition metal-ion ordering, charge ordering, as well as Na+ and vacancy ordering. An interesting structure change of Na0.66Co x Mn0.66-x Ti0.34O2 from orthorhombic to hexagonal is revealed when Co content increases from x = 0 to 0.33. In particular, Na0.66Co0.22Mn0.44Ti0.34O2 with a P2-type layered structure delivers a reversible capacity of 120 mAh g-1 at 0.1 C. When the current density increases to 10 C, a reversible capacity of 63.2 mAh g-1 can still be obtained, indicating a promising rate capability. The low valence Co2+ substitution results in the formation of average Mn3.7+ valence state in Na0.66Co0.22Mn0.44Ti0.34O2, effectively suppressing the Mn3+-induced Jahn-Teller distortion, and in turn stabilizing the layered structure. X-ray absorption spectroscopy results suggest that the charge compensation of Na0.66Co0.22Mn0.44Ti0.34O2 during charge/discharge is contributed by Co2.2+/Co3+ and Mn3.3+/Mn4+ redox couples. This is the first time that the highly reversible Co2+/Co3+ redox couple is observed in P2-layered cathodes for sodium-ion batteries. This finding may open new approaches to design advanced intercalation-type cathode materials.
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Affiliation(s)
- Qin‐Chao Wang
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
| | - Enyuan Hu
- Chemistry DivisionBrookhaven National LaboratoryUptonNY11973USA
| | - Yang Pan
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
| | - Na Xiao
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
| | - Fan Hong
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
| | - Zheng‐Wen Fu
- Department of Chemistry & Laser Chemistry InstituteFudan UniversityShanghai200433P. R. China
| | - Xiao‐Jing Wu
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
| | - Seong‐Min Bak
- Chemistry DivisionBrookhaven National LaboratoryUptonNY11973USA
| | - Xiao‐Qing Yang
- Chemistry DivisionBrookhaven National LaboratoryUptonNY11973USA
| | - Yong‐Ning Zhou
- Department of Materials ScienceFudan UniversityShanghai200433P. R. China
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Cho W, Myeong S, Kim N, Lee S, Kim Y, Kim M, Kang SJ, Park N, Oh P, Cho J. Critical Role of Cations in Lithium Sites on Extended Electrochemical Reversibility of Co-Rich Layered Oxide. Adv Mater 2017; 29:1605578. [PMID: 28370747 DOI: 10.1002/adma.201605578] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 01/23/2017] [Indexed: 06/07/2023]
Abstract
Only a very limited amount of the high theoretical energy density of LiCoO2 as a cathode material has been realized, due to its irreversible deterioration when more than 0.6 mol of lithium ions are extracted. In this study, new insights into the origin of such low electrochemical reversibility, namely the structural collapse caused by electrostatic repulsion between oxygen ions during the charge process are suggested. By incorporating the partial cation migration of LiNiO2 , which produces a screen effect of cations in the 3b-Li site, the phase distortion of LiCoO2 is successfully delayed which in turn expands its electrochemical reversibility. This study elucidates the relationship between the structural reversibility and electrochemical behavior of layered cathode materials and enables new design of Co-rich layered materials for cathodes with high energy density.
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Affiliation(s)
- Woongrae Cho
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Republic of Korea
| | - Seungjun Myeong
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Republic of Korea
| | - Namhyung Kim
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Republic of Korea
| | - Sanghan Lee
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Republic of Korea
| | - Youngki Kim
- UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Republic of Korea
| | - Maengsuk Kim
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Republic of Korea
| | - Seok Ju Kang
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Republic of Korea
| | - Noejung Park
- Department of Physics, School of Natural Science, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Republic of Korea
| | - Pilgun Oh
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Republic of Korea
| | - Jaephil Cho
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Republic of Korea
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38
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Li Q, Bai Y, Jin T, Wang S, Cui W, Stanciulescu I, Yang R, Nie H, Wang L, Zhang X. Bioinspired Engineering of Poly(ethylene glycol) Hydrogels and Natural Protein Fibers for Layered Heart Valve Constructs. ACS Appl Mater Interfaces 2017; 9:16524-16535. [PMID: 28448124 DOI: 10.1021/acsami.7b03281] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Layered constructs from poly(ethylene glycol) (PEG) hydrogels and chicken eggshell membranes (ESMs) are fabricated, which can be further cross-linked by glutaraldehyde (GA) to form GA-PEG-ESM composites. Our results indicate that ESMs composed of protein fibrous networks show elastic moduli ∼3.3-5.0 MPa and elongation percentages ∼47-56%, close to human heart valve leaflets. Finite element simulations reveal obvious stress concentration on a partial number of fibers in the GA-cross-linked ESM (GA-ESM) samples, which can be alleviated by efficient stress distribution among multiple layers of ESMs embedded in PEG hydrogels. Moreover, the polymeric networks of PEG hydrogels can prevent mineral deposition and enzyme degradation of protein fibers from incorporated ESMs. The fibrous structures of ESMs retain in the GA-PEG-ESM samples after subcutaneous implantation for 4 weeks, while those from ESM and GA-ESM samples show early degradation to certain extent, suggesting the prevention of enzymatic degradation of protein fibers by the polymeric network of PEG hydrogels in vivo. Thus, these GA-PEG-ESM layered constructs show heterogenic structures and mechanical properties comparable to heart valve leaflets, as well as improved functions to prevent progressive calcification and enzymatic degeneration, which are likely used for artificial heart valves.
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Affiliation(s)
- Qian Li
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang, Liaoning 110016, China
- Department of Chemistry, Northeastern University , Shenyang, Liaoning 110004, China
| | - Yun Bai
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang, Liaoning 110016, China
| | - Tao Jin
- Department of Civil and Environmental Engineering, Rice University , Houston, Texas 77005, United States
| | - Shuo Wang
- Institute of Bionanotechnology and Tissue Engineering, College of Life Sciences, Hunan University , Changsha, Hunan 410082, China
| | - Wei Cui
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang, Liaoning 110016, China
| | - Ilinca Stanciulescu
- Department of Civil and Environmental Engineering, Rice University , Houston, Texas 77005, United States
| | - Rui Yang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang, Liaoning 110016, China
- School of Materials Science, University of Science and Technology of China , Hefei, Anhui 230026, China
| | - Hemin Nie
- Institute of Bionanotechnology and Tissue Engineering, College of Life Sciences, Hunan University , Changsha, Hunan 410082, China
| | - Linshan Wang
- Department of Chemistry, Northeastern University , Shenyang, Liaoning 110004, China
| | - Xing Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang, Liaoning 110016, China
- School of Materials Science, University of Science and Technology of China , Hefei, Anhui 230026, China
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39
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Wu KT, Hwang SJ, Lee HH. Finite Element Analysis of Film Stack Architecture for Complementary Metal-Oxide-Semiconductor Image Sensors. Sensors (Basel) 2017; 17:E1004. [PMID: 28468324 DOI: 10.3390/s17051004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 04/25/2017] [Accepted: 04/28/2017] [Indexed: 11/18/2022]
Abstract
Image sensors are the core components of computer, communication, and consumer electronic products. Complementary metal oxide semiconductor (CMOS) image sensors have become the mainstay of image-sensing developments, but are prone to leakage current. In this study, we simulate the CMOS image sensor (CIS) film stacking process by finite element analysis. To elucidate the relationship between the leakage current and stack architecture, we compare the simulated and measured leakage currents in the elements. Based on the analysis results, we further improve the performance by optimizing the architecture of the film stacks or changing the thin-film material. The material parameters are then corrected to improve the accuracy of the simulation results. The simulated and experimental results confirm a positive correlation between measured leakage current and stress. This trend is attributed to the structural defects induced by high stress, which generate leakage. Using this relationship, we can change the structure of the thin-film stack to reduce the leakage current and thereby improve the component life and reliability of the CIS components.
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40
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Kim ES, Hwang JY, Lee KH, Ohta H, Lee YH, Kim SW. Graphene Substrate for van der Waals Epitaxy of Layer-Structured Bismuth Antimony Telluride Thermoelectric Film. Adv Mater 2017; 29:1604899. [PMID: 27996181 DOI: 10.1002/adma.201604899] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 11/14/2016] [Indexed: 06/06/2023]
Abstract
Graphene as a substrate for the van der Waals epitaxy of 2D layered materials is utilized for the epitaxial growth of a layer-structured thermoelectric film. Van der Waals epitaxial Bi0.5 Sb1.5 Te3 film on graphene synthesized via a simple and scalable fabrication method exhibits good crystallinity and high thermoelectric transport properties comparable to single crystals.
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Affiliation(s)
- Eun Sung Kim
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jae-Yeol Hwang
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Kyu Hyoung Lee
- Department of Nano Applied Engineering, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Hiromichi Ohta
- Research Institute for Electronic Science, Hokkaido University, N20W10, Kita, Sapporo, 001-0020, Japan
| | - Young Hee Lee
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon, 16419, Republic of Korea
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Sung Wng Kim
- Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
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41
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Chen Z, Zhang C, Jiang XF, Liu M, Xia R, Shi T, Chen D, Xue Q, Zhao YJ, Su S, Yip HL, Cao Y. High-Performance Color-Tunable Perovskite Light Emitting Devices through Structural Modulation from Bulk to Layered Film. Adv Mater 2017; 29. [PMID: 28000969 DOI: 10.1002/adma.201603157] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 11/09/2016] [Indexed: 05/11/2023]
Abstract
Adding 2-phenoxyethylamine (POEA) into a CH3 NH3 PbBr3 precursor solution can modulate the organic-inorganic hybrid perovskite structure from bulk to layered, with a photoluminescence and electroluminescence shift from green to blue. Meanwhile, POEA can passivate the CH3 NH3 PbBr3 surface and help to obtain a pure CH3 NH3 PbBr3 phase, leading to an improvement of the external quantum efficiency to nearly 3% in CH3 NH3 PbBr3 LED.
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Affiliation(s)
- Ziming Chen
- State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China
| | - Chongyang Zhang
- State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China
| | - Xiao-Fang Jiang
- State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China
| | - Meiyue Liu
- State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China
| | - Ruoxi Xia
- State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China
| | - Tingting Shi
- State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China
| | - Dongcheng Chen
- State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China
| | - Qifan Xue
- State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China
| | - Yu-Jun Zhao
- Department of Physics, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China
| | - Shijian Su
- State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China
| | - Hin-Lap Yip
- State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China
| | - Yong Cao
- State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China
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Xuan J, Wang Z, Chen Y, Liang D, Cheng L, Yang X, Liu Z, Ma R, Sasaki T, Geng F. Organic-Base-Driven Intercalation and Delamination for the Production of Functionalized Titanium Carbide Nanosheets with Superior Photothermal Therapeutic Performance. Angew Chem Int Ed Engl 2016; 55:14569-14574. [PMID: 27774723 DOI: 10.1002/anie.201606643] [Citation(s) in RCA: 218] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 09/05/2016] [Indexed: 02/04/2023]
Abstract
The delamination of titanium carbide sheets, an intriguing class of two-dimensional materials, has been critically dependent on the extraction of interlayer Al in acidic media, such as concentrated hydrofluoric acid (HF) or a mixture of hydrochloric acid (HCl) and a fluoride salt. Herein, we report an organic-base-driven intercalation and delamination of titanium carbide that takes advantage of the amphoteric nature of interlayer Al. The resulting aluminum-oxoanion-functionalized titanium carbide sheets manifested unusually strong optical absorption in the near-infrared (NIR) region with a mass extinction coefficient as high as 29.1 L g-1 cm-1 at 808 nm. Thus, the performance of this material is comparable or even superior to that of state-of-the-art photoabsorption materials, including gold-based nanostructures, carbon-based materials, and transition-metal dichalcogenides. Preliminary studies show that the titanium carbide sheets serve as efficient photothermal agents against tumor cells.
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Affiliation(s)
- Jinnan Xuan
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Zhiqiang Wang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Yuyan Chen
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Dujuan Liang
- College of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Liang Cheng
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Xiaojing Yang
- College of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Zhuang Liu
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Renzhi Ma
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Takayoshi Sasaki
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Fengxia Geng
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
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43
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Moreno JM, Navarro I, Díaz U, Primo J, Corma A. Single-Layered Hybrid Materials Based on 1D Associated Metalorganic Nanoribbons for Controlled Release of Pheromones. Angew Chem Int Ed Engl 2016; 55:11026-30. [PMID: 27444798 PMCID: PMC5113779 DOI: 10.1002/anie.201602215] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 05/04/2016] [Indexed: 11/09/2022]
Abstract
A new family of stable layered organic-inorganic materials has been prepared, in one-step solvothermal process. They are based on an ordered nickel cluster-type nanoribbons separated from each other by specific alkyl (heptyl- or dodecyl-) arylic mono-carboxylate moieties acting as molecular spacers, perpendicular to the 1D inorganic chains. These organic spacers contain hydrocarbon tails with different length which control the separation level between inorganic 1D sub-units, inhibiting the 3D growth of conventional DUT-8-type metal-organic frameworks (MOFs). The lamellar nature of the materials formed was studied and confirmed by different characterization techniques, showing the structural location of individual organic and inorganic building units. They have been successfully used as a long-lasting biodegradable and water-proof materials for controlled release of chemicals, such as pheromones for sustainable treatment of insect plagues.
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Affiliation(s)
- José María Moreno
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain
| | - Ismael Navarro
- Centro de Ecología Química Agrícola, Universidad Politécnica de Valencia, Edificio 6C, 5aplanta, Avenida de los naranjos s/n, 46022, Valencia, Spain
| | - Urbano Díaz
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain
| | - Jaime Primo
- Centro de Ecología Química Agrícola, Universidad Politécnica de Valencia, Edificio 6C, 5aplanta, Avenida de los naranjos s/n, 46022, Valencia, Spain
| | - Avelino Corma
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain.
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Zhao H, Yue Y, Zhang Y, Li L, Guo L. Ternary Artificial Nacre Reinforced by Ultrathin Amorphous Alumina with Exceptional Mechanical Properties. Adv Mater 2016; 28:2037-42. [PMID: 26780718 DOI: 10.1002/adma.201505511] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Revised: 11/29/2015] [Indexed: 05/25/2023]
Abstract
A novel ternary artificial nacre is developed through a vacuum-assisted filtration method, with reinforced ultrathin amorphous alumina that is grown in situ on the surface of GO. This ternary artificial nacre simultaneously shows exceptional strength and toughness, which have, up to now, been considered to be mutually exclusive. This novel material will play a role in the structuring of future materials.
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Affiliation(s)
- Hewei Zhao
- School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China
| | - Yonghai Yue
- School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China
| | - Youwei Zhang
- School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China
| | - Lidong Li
- School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China
| | - Lin Guo
- School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China
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Keller M, Buchholz D, Passerini S. Layered Na-Ion Cathodes with Outstanding Performance Resulting from the Synergetic Effect of Mixed P- and O-Type Phases. Adv Energy Mater 2016; 6:1501555. [PMID: 27134617 PMCID: PMC4845635 DOI: 10.1002/aenm.201501555] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 10/28/2015] [Indexed: 05/21/2023]
Abstract
Herein, the synthesis of new quaternary layered Na-based oxides of the type Na x Mn y Ni z Fe0.1Mg0.1O2 (0.67≤ x ≤ 1.0; 0.5≤ y ≤ 0.7; 0.1≤ z ≤ 0.3) is described. The synthesis can be tuned to obtain P2- and O3-type as well as mixed P-/O-type phases as demonstrated by structural, morphological, and electrochemical properties characterization. Although all materials show good electrochemical performance, the simultaneous presence of the P- and O-type phases is found to have a synergetic effect resulting in outstanding performance of the mixed phase material as a sodium-ion cathode. The mixed P3/P2/O3-type material, having an average elemental composition of Na0.76Mn0.5Ni0.3Fe0.1Mg0.1O2, overcomes the specific drawbacks associated with the P2- and O3-type materials, allowing the outstanding electrochemical performance. In detail, the mixed phase material is able to deliver specific discharge capacities of up to 155 mAh g-1 (18 mA g-1) in the potential range of 2.0-4.3 V. In the narrower potential range of 2.5-4.3 V the material exhibits high average discharge potential (3.4 V versus Na/Na+), exceptional average coulombic efficiencies (>99.9%), and extraordinary capacity retention (90.2% after 601 cycles). The unexplored class of P-/O-type mixed phases introduces new perspectives for the development of layered positive electrode materials and powerful Na-ion batteries.
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Affiliation(s)
- Marlou Keller
- Helmholtz Institute Ulm (HIU) Helmholtzstrasse 11 89081 Ulm Germany; Karlsruhe Institute of Technology (KIT) P.O. Box 3640 76021 Karlsruhe Germany
| | - Daniel Buchholz
- Helmholtz Institute Ulm (HIU) Helmholtzstrasse 11 89081 Ulm Germany; Karlsruhe Institute of Technology (KIT) P.O. Box 3640 76021 Karlsruhe Germany
| | - Stefano Passerini
- Helmholtz Institute Ulm (HIU) Helmholtzstrasse 11 89081 Ulm Germany; Karlsruhe Institute of Technology (KIT) P.O. Box 3640 76021 Karlsruhe Germany
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Wang Y, Yang Z, Qian Y, Gu L, Zhou H. New Insights into Improving Rate Performance of Lithium-Rich Cathode Material. Adv Mater 2015; 27:3915-3920. [PMID: 25996646 DOI: 10.1002/adma.201500956] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 03/31/2015] [Indexed: 06/04/2023]
Abstract
A Sn doping strategy is demonstrated to improve lithium diffusion kinetics by expanding the spacing of (003) planes without destroying the layered structure. A large (003) spacing will significantly decrease the energy barrier associated with lithium diffusion. Besides better rate capability, the Sn-doped material exhibits an unexpected much improved capacity above 3.0 V (vs Li(+) /Li), which is highly desired in future applications.
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Affiliation(s)
- Yongqing Wang
- National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568, Japan
| | - Zhenzhong Yang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- Collaborative Innovation Center of Quantum Matter, Beijing, 100190, China
| | - Yumin Qian
- National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568, Japan
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- Collaborative Innovation Center of Quantum Matter, Beijing, 100190, China
| | - Haoshen Zhou
- National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568, Japan
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Zhang Y, Peng C, Zhou Z, Duan R, Ji H, Che Y, Zhao J. Giant morphological change in layered microribbons featuring reversible sliding of stacking layers. Adv Mater 2015; 27:320-325. [PMID: 25382252 DOI: 10.1002/adma.201404121] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2014] [Revised: 10/10/2014] [Indexed: 06/04/2023]
Abstract
A light-induced giant lateral or longitudinal morphological change in layered microribbons is reported. This morphological change originates from the directional sliding of the stacking layers with respect to one another between their polar surfaces, into which the photoexcited intermolecular non-bonded distortion is translated. Upon exposure to an electron beam, the laterally displaced layers slide back to their original positions.
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Affiliation(s)
- Yifan Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China
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Yao HB, Ge J, Mao LB, Yan YX, Yu SH. 25th anniversary article: Artificial carbonate nanocrystals and layered structural nanocomposites inspired by nacre: synthesis, fabrication and applications. Adv Mater 2014; 26:163-87. [PMID: 24338814 DOI: 10.1002/adma.201303470] [Citation(s) in RCA: 131] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Indexed: 05/24/2023]
Abstract
Rigid biological systems are increasingly becoming a source of inspiration for the fabrication of next generation advanced functional materials due to their diverse hierarchical structures and remarkable engineering properties. Among these rigid biomaterials, nacre, as the main constituent of the armor system of seashells, exhibiting a well-defined 'brick-and-mortar' architecture, excellent mechanical properties, and interesting iridescence, has become one of the most attractive models for novel artificial materials design. In this review, recent advances in nacre-inspired artificial carbonate nanocrystals and layered structural nanocomposites are presented. To clearly illustrate the inspiration of nacre, the basic principles relating to plate-like aragonite single-crystal growth and the contribution of hierarchical structure to outstanding properties in nacre are discussed. The inspiration of nacre for the synthesis of carbonate nanocrystals and the fabrication of layered structural nanocomposites is also discussed. Furthermore, the broad applications of these nacre inspired materials are emphasized. Finally, a brief summary of present nacre-inspired materials and challenges for the next generation of nacre-inspired materials is given.
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Affiliation(s)
- Hong-Bin Yao
- Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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Hunt GW, Dodwell TJ, Hammond J. On the nucleation and growth of kink and shear bands. Philos Trans A Math Phys Eng Sci 2013; 371:20120431. [PMID: 23690641 DOI: 10.1098/rsta.2012.0431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Similarities and differences between the phenomena of kink banding in compressed layered structures and shear banding in compressed granular media are explored. Simple models are introduced for both, and the focus is directed onto how they can nucleate from the perfectly flat state. A convincing scenario is found for each in which a mode develops from an initial bifurcation into a periodic state, followed by rapid localization under falling load, while retaining decaying but wavy tails. At a certain lower critical load, the tails lose their waviness, and the expected form of the kink or shear band appears. In each case, good numerical evidence is provided for the existence of this form of behaviour. A second potential instability for the layered case is also explored, linked to the appearance of a critical force dipole that overcomes bending stiffness locally at some point along the length. This mode, which should appear with non-wavy decaying tails at the lower of the two critical loads mentioned earlier, proves somewhat elusive. Evidence is found for its existence in the linearized approximation to the layered model, but the search for numerical solutions to the underlying nonlinear equation is hindered by a shortage of suitable boundary conditions.
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Affiliation(s)
- G W Hunt
- Centre for Nonlinear Mechanics, University of Bath, Bath BA2 7AY, UK.
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