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Huang J, Li L, Hu Z, Tsai BK, Huang J, Shen J, Zhang Y, Barnard JP, Song J, Wang H. Ultrathin Ternary FeCoNi Alloy Nanoarrays in BaTiO 3 Matrix for Room-Temperature Multiferroic and Hyperbolic Metamaterial. NANO LETTERS 2024; 24:10081-10089. [PMID: 39109585 DOI: 10.1021/acs.nanolett.4c02036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/22/2024]
Abstract
Multifunctional vertically aligned nanocomposite (VAN) thin films exhibit considerable potential in diverse fields. Here, a BaTiO3-FeCoNi alloy (BTO-FCN) system featuring an ultrathin ternary FCN alloy nanopillar array embedded in the BTO matrix has been developed with tailorable nanopillar size and interpillar distance. The magnetic alloy nanopillars combined with a ferroelectric oxide matrix present intriguing multifunctionality and coupling properties. The room-temperature magnetic response proves the soft magnet nature of the BTO-FCN films with magnetic anisotropy has been demonstrated. Furthermore, the anisotropic nature of the dielectric-metal alloy VAN renders it an ideal candidate for hyperbolic metamaterial (HMM), and the epsilon-near-zero (ENZ) wavelength, where the real part of permittivity (ε') turns to negative, can be tailored from ∼700 nm to ∼1050 nm. Lastly, room-temperature multiferroicity has been demonstrated via interfacial coupling between the magnetic nanopillars and ferroelectric matrix.
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Affiliation(s)
- Jijie Huang
- School of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Leigang Li
- College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Zedong Hu
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Benson Kunhung Tsai
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Jialong Huang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Jianan Shen
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Yizhi Zhang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - James P Barnard
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Jiawei Song
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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2
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Wei S, Xia X, Bi S, Hu S, Wu X, Hsu HY, Zou X, Huang K, Zhang DW, Sun Q, Bard AJ, Yu ET, Ji L. Metal-insulator-semiconductor photoelectrodes for enhanced photoelectrochemical water splitting. Chem Soc Rev 2024; 53:6860-6916. [PMID: 38833171 DOI: 10.1039/d3cs00820g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
Photoelectrochemical (PEC) water splitting provides a scalable and integrated platform to harness renewable solar energy for green hydrogen production. The practical implementation of PEC systems hinges on addressing three critical challenges: enhancing energy conversion efficiency, ensuring long-term stability, and achieving economic viability. Metal-insulator-semiconductor (MIS) heterojunction photoelectrodes have gained significant attention over the last decade for their ability to efficiently segregate photogenerated carriers and mitigate corrosion-induced semiconductor degradation. This review discusses the structural composition and interfacial intricacies of MIS photoelectrodes tailored for PEC water splitting. The application of MIS heterostructures across various semiconductor light-absorbing layers, including traditional photovoltaic-grade semiconductors, metal oxides, and emerging materials, is presented first. Subsequently, this review elucidates the reaction mechanisms and respective merits of vacuum and non-vacuum deposition techniques in the fabrication of the insulator layers. In the context of the metal layers, this review extends beyond the conventional scope, not only by introducing metal-based cocatalysts, but also by exploring the latest advancements in molecular and single-atom catalysts integrated within MIS photoelectrodes. Furthermore, a systematic summary of carrier transfer mechanisms and interface design principles of MIS photoelectrodes is presented, which are pivotal for optimizing energy band alignment and enhancing solar-to-chemical conversion efficiency within the PEC system. Finally, this review explores innovative derivative configurations of MIS photoelectrodes, including back-illuminated MIS photoelectrodes, inverted MIS photoelectrodes, tandem MIS photoelectrodes, and monolithically integrated wireless MIS photoelectrodes. These novel architectures address the limitations of traditional MIS structures by effectively coupling different functional modules, minimizing optical and ohmic losses, and mitigating recombination losses.
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Affiliation(s)
- Shice Wei
- School of Microelectronics & Jiashan Fudan Institute, Fudan University, Shanghai 200433, China.
| | - Xuewen Xia
- School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.
| | - Shuai Bi
- Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong 999077, China
| | - Shen Hu
- School of Microelectronics & Jiashan Fudan Institute, Fudan University, Shanghai 200433, China.
| | - Xuefeng Wu
- School of Microelectronics & Jiashan Fudan Institute, Fudan University, Shanghai 200433, China.
| | - Hsien-Yi Hsu
- Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong 999077, China
| | - Xingli Zou
- School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.
| | - Kai Huang
- Department of Physics, Xiamen University, Xiamen 361005, China.
| | - David W Zhang
- School of Microelectronics & Jiashan Fudan Institute, Fudan University, Shanghai 200433, China.
| | - Qinqqing Sun
- School of Microelectronics & Jiashan Fudan Institute, Fudan University, Shanghai 200433, China.
| | - Allen J Bard
- Department of Chemistry, The University of Texas at Austin, Texas 78713, USA
| | - Edward T Yu
- Department of Electrical and Computer Engineering, The University of Texas at Austin, Texas 78758, USA.
| | - Li Ji
- School of Microelectronics & Jiashan Fudan Institute, Fudan University, Shanghai 200433, China.
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MacManus-Driscoll JL, Wu R, Li W. Interface-related phenomena in epitaxial complex oxide ferroics across different thin film platforms: opportunities and challenges. MATERIALS HORIZONS 2023; 10:1060-1086. [PMID: 36815609 PMCID: PMC10068909 DOI: 10.1039/d2mh01527g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 02/16/2023] [Indexed: 06/18/2023]
Abstract
Interfaces in complex oxides give rise to fascinating new physical phenomena arising from the interconnected spin, lattice, charge and orbital degrees of freedom. Most commonly, interfaces are engineered in epitaxial superlattice films. Of growing interest also are epitaxial vertically aligned nanocomposite films where interfaces form by self-assembly. These two thin film forms offer different capabilities for materials tuning and have been explored largely separately from one another. Ferroics (ferroelectric, ferromagnetic, multiferroic) are among the most fascinating phenomena to be manipulated using interface effects. Hence, in this review we compare and contrast the ferroic properties that arise in these two different film forms, highlighting exemplary materials combinations which demonstrate novel, enhanced and/or emergent ferroic functionalities. We discuss the origins of the observed functionalities and propose where knowledge can be translated from one materials form to another, to potentially produce new functionalities. Finally, for the two different film forms we present a perspective on underexplored/emerging research directions.
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Affiliation(s)
| | - Rui Wu
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK.
- Spin-X Institute, School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices, Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, South China University of Technology, Guangzhou 511442, China
| | - Weiwei Li
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK.
- MIIT Key Laboratory of Aerospace Information Materials and Physics, State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
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Misra S, Wang H. Review on the growth, properties and applications of self-assembled oxide-metal vertically aligned nanocomposite thin films-current and future perspectives. MATERIALS HORIZONS 2021; 8:869-884. [PMID: 34821319 DOI: 10.1039/d0mh01111h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Self-assembled oxide-metal nanocomposite thin films have aroused great research interest owing to their wide range of functionalities, including metamaterials with plasmonic and hyperbolic optical properties, and ferromagnetic, ferroelectric and multiferroic behaviors. Oxide-metal nanocomposites typically self-assemble as metal particles in an oxide matrix or as a vertically aligned nanocomposite (VAN) with metal nanopillars embedded in an oxide matrix. Among them, the VAN architecture is particularly interesting due to the vertical strain control and highly anisotropic structure, enabling the epitaxial growth of materials with large lattice mismatch. In this review, the driving forces behind the formation of self-assembled oxide-metal VAN structures are discussed. Specifically, an updated in-plane strain compensation model based on the areal strain compensation concept has been proposed in this review, inspired by the prior linear strain compensation model. It provides a guideline for material selection for designing VAN systems, especially those involving complex orientation matching relationships. Based on the model, several case studies are discussed, comparing the microstructure and morphology of different oxide-metal nanocomposites by varying the oxide phase. Specific examples highlighting the coupling between the electrical, magnetic and optical properties are also discussed in the context of oxide-metal nanocomposites. Future research directions and needs are also discussed.
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Affiliation(s)
- Shikhar Misra
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA.
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Huang J, Zhang D, Qi Z, Zhang B, Wang H. Hybrid Ag-LiNbO 3 nanocomposite thin films with tailorable optical properties. NANOSCALE ADVANCES 2021; 3:1121-1126. [PMID: 36133298 PMCID: PMC9417351 DOI: 10.1039/d0na00975j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 12/28/2020] [Indexed: 06/16/2023]
Abstract
Ag nanostructures exhibit extraordinary optical properties, which are important for photonic device integration. Herein, we deposited Ag-LiNbO3 (LNO) nanocomposite thin films with Ag nanoparticles (NPs) embedded into the LNO matrix by the co-deposition of Ag and LNO using a pulsed laser deposition (PLD) method. The density and size of Ag NPs were tailored by varying the Ag composition. Low-density and high-density Ag-LNO nanocomposite thin films were deposited and their optical properties, such as transmittance spectra, ellipsometry measurement, as well as angle-dependent and polarization-resolved reflectivity spectra, were explored. The Ag-LNO films show surface plasmon resonance (SPR) in the visible range, tunable optical constants and optical anisotropy, which are critical for photonic device applications.
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Affiliation(s)
- Jijie Huang
- School of Materials, Sun Yat-sen University Guangzhou Guangdong 510275 China
| | - Di Zhang
- School of Materials Engineering, Purdue University West Lafayette IN 47907 USA
| | - Zhimin Qi
- School of Materials Engineering, Purdue University West Lafayette IN 47907 USA
| | - Bruce Zhang
- School of Electrical and Computer Engineering, Purdue University West Lafayette IN 47907 USA
| | - Haiyan Wang
- School of Materials Engineering, Purdue University West Lafayette IN 47907 USA
- School of Electrical and Computer Engineering, Purdue University West Lafayette IN 47907 USA
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Huang J, Wang H, Qi Z, Lu P, Zhang D, Zhang B, He Z, Wang H. Multifunctional Metal-Oxide Nanocomposite Thin Film with Plasmonic Au Nanopillars Embedded in Magnetic La 0.67Sr 0.33MnO 3 Matrix. NANO LETTERS 2021; 21:1032-1039. [PMID: 33405932 DOI: 10.1021/acs.nanolett.0c04213] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Searching for multifunctional materials with tunable magnetic and optical properties has been a critical task toward the implementation of future integrated optical devices. Vertically aligned nanocomposite (VAN) thin films provide a unique platform for multifunctional material designs. Here, a new metal-oxide VAN has been designed with plasmonic Au nanopillars embedded in a ferromagnetic La0.67Sr0.33MnO3 (LSMO) matrix. Such Au-LSMO nanocomposite presents intriguing plasmon resonance in the visible range and magnetic anisotropy property, which are functionalized by the Au and LSMO phase, respectively. Furthermore, the vertically aligned nanostructure of metal and dielectric oxide results in the hyperbolic property for near-field electromagnetic wave manipulation. Such optical and magnetic response could be further tailored by tuning the composition of Au and LSMO phases.
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Affiliation(s)
- Jijie Huang
- School of Materials, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Han Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, United States
| | - Zhimin Qi
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, United States
| | - Ping Lu
- Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Di Zhang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, United States
| | - Bruce Zhang
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47906, United States
| | - Zihao He
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47906, United States
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, United States
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47906, United States
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7
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Zhang B, Kalaswad M, Rutherford BX, Misra S, He Z, Wang H, Qi Z, Wissel AE, Xu X, Wang H. Au-Encapsulated Fe Nanorods in Oxide Matrix with Tunable Magneto-Optic Coupling Properties. ACS APPLIED MATERIALS & INTERFACES 2020; 12:51827-51836. [PMID: 33164483 DOI: 10.1021/acsami.0c14424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Materials with magneto-optic coupling properties are highly coveted for their potential applications ranging from spintronics and optical switches to sensors. In this work, a new, three-phase Au-Fe-La0.5Sr0.5FeO3 (LSFO) hybrid material grown in a vertically aligned nanocomposite (VAN) form has been demonstrated. This three-phase hybrid material combines the strong ferromagnetic properties of Fe and the strong plasmonic properties of Au and the dielectric nature of the LSFO matrix. More interestingly, the immiscible Au and Fe phases form Au-encapsulated Fe nanopillars, embedded in the LSFO matrix. Multifunctionalities including anisotropic optical dielectric properties, plasmonic properties, magnetic anisotropy, and room-temperature magneto-optic Kerr effect coupling are demonstrated. The single-step growth method to grow the immiscible two-metal nanostructures (i.e., Au and Fe) in the complex hybrid material form opens exciting new potential opportunities for future three-phase VAN systems with more versatile metal selections.
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Affiliation(s)
- Bruce Zhang
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Matias Kalaswad
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Bethany X Rutherford
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Shikhar Misra
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Zihao He
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Haohan Wang
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
| | - Zhimin Qi
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Ashley E Wissel
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xiaoshan Xu
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
| | - Haiyan Wang
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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Wang X, Wang H. Self-assembled nitride-metal nanocomposites: recent progress and future prospects. NANOSCALE 2020; 12:20564-20579. [PMID: 33090168 DOI: 10.1039/d0nr06316a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Two-phase nanocomposites have gained significant research interest because of their multifunctionalities, tunable geometries and potential device applications. Different from the previously demonstrated oxide-oxide 2-phase nanocomposites, coupling nitrides with metals shows high potential for building alternative hybrid plasmonic metamaterials towards chemical sensing, tunable plasmonics, and nonlinear optics. Unique advantages, including distinct atomic interface, excellent crystalline quality, large-scale surface coverage and durable solid-state platform, address the high demand for new hybrid metamaterial designs for versatile optical material needs. This review summarizes the recent progress on nitride-metal nanocomposites, specifically targeting bottom-up self-assembled nanocomposite thin films. Various morphologies including vertically aligned nanocomposites (VANs), self-organized nanoinclusions, and nanoholes fabricated by additional chemical treatments are introduced. Starting from thin film nucleation and growth, the prerequisites of successful strain coupling and the underlying growth mechanisms are discussed. These findings facilitate a better control of tunable nanostructures and optical functionalities. Future research directions are proposed, including morphological control of the secondary phase to enhance its homogeneity, coupling nitrides with magnetic phase for the magneto-optical effect and growing all-ceramic nanocomposites to extend functionalities and anisotropy.
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Affiliation(s)
- Xuejing Wang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. and School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. and School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA
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Dong Z, Ding F, Zhang H, Shang H, Huang D, Xu W, Li T, Zou Q, Gu H. Preparation of high performance YGdBCO films by low fluorine TFA-MOD process. J RARE EARTH 2020. [DOI: 10.1016/j.jre.2019.11.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Huang J, Wang H, Li D, Qi Z, Zhang D, Lu P, Chen HT, Yarotski DA, Lin PT, Zhang X, Wang H. Room-Temperature Ferroelectric LiNb 6Ba 5Ti 4O 30 Spinel Phase in a Nanocomposite Thin Film Form for Nonlinear Photonics. ACS APPLIED MATERIALS & INTERFACES 2020; 12:23076-23083. [PMID: 32340437 DOI: 10.1021/acsami.0c03487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Tetragonal tungsten bronze (TTB) materials are one of the most promising classes of materials for ferroelectric and nonlinear optical devices, owing to their very unique noncentrosymmetric crystal structure. In this work, a new TTB phase of LiNb6Ba5Ti4O30 (LNBTO) has been discovered and studied. A small amount of a secondary phase, LiTiO2 (LTO), has been incorporated as nanopillars that are vertically embedded in the LNBTO matrix. The new multifunctional nanocomposite thin film presents exotic highly anisotropic microstructure and properties, e.g., strong ferroelectricity, high optical transparency, anisotropic dielectric function, and strong optical nonlinearity evidenced by the second harmonic generation results. An optical waveguide structure based on the stacks of α-Si on SiO2/LNBTO-LTO has been fabricated, exhibiting low optical dispersion with an optimized evanescent field staying in the LNBTO-LTO active layer. This work highlights the combination of new TTB material designs and vertically aligned nanocomposite structures for further enhanced anisotropic and nonlinear properties.
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Affiliation(s)
- Jijie Huang
- School of Materials, Sun Yat-Sen University, Guangzhou, Guangdong 510275, China
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, United State
| | - Han Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, United State
| | - Dongfang Li
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Zhimin Qi
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, United State
| | - Di Zhang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, United State
| | - Ping Lu
- Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Hou-Tong Chen
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Dmitry A Yarotski
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Pao-Tai Lin
- Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Xinghang Zhang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, United State
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, United State
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47906, United States
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Li Y, Pascal K, Jin XJ. Ni–Mo modified metal–organic frameworks for high-performance supercapacitance and enzymeless H 2O 2 detection. CrystEngComm 2020. [DOI: 10.1039/d0ce00666a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The growth process for A(B)-NixMoy-MOFs@AAC hybrids.
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Affiliation(s)
- Yue Li
- Beijing Forestry University
- Beijing
- China
| | - Kamdem Pascal
- School of Packaging Michigan State University
- East Lansing
- USA
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Zhang B, Huang J, Jian J, Rutherford BX, Li L, Misra S, Sun X, Wang H. Tuning magnetic anisotropy in Co-BaZrO 3 vertically aligned nanocomposites for memory device integration. NANOSCALE ADVANCES 2019; 1:4450-4458. [PMID: 36134413 PMCID: PMC9417828 DOI: 10.1039/c9na00438f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Accepted: 09/28/2019] [Indexed: 05/18/2023]
Abstract
Ferromagnetic nanostructures with strong anisotropic properties are highly desired for their potential integration into spintronic devices. Several anisotropic candidates, such as CoFeB and Fe-Pt, have been previously proposed, but many of them have limitations such as patterning issues or thickness restrictions. In this work, Co-BaZrO3 (Co-BZO) vertically aligned nanocomposite (VAN) films with tunable magnetic anisotropy and coercive field strength have been demonstrated to address this need. Such tunable magnetic properties are achieved through tuning the thickness of the Co-BZO VAN structures and the aspect ratio of the Co nanostructures, which can be easily integrated into spintronic devices. As a demonstration, we have integrated the Co-BZO VAN nanostructure into tunnel junction devices, which demonstrated resistive switching alluding to Co-BZO's immense potential for future spintronic devices.
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Affiliation(s)
- Bruce Zhang
- School of Electrical and Computer Engineering, Purdue University West Lafayette Indiana 47907-2045 USA
| | - Jijie Huang
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907-2045 USA
| | - Jie Jian
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907-2045 USA
| | - Bethany X Rutherford
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907-2045 USA
| | - Leigang Li
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907-2045 USA
| | - Shikhar Misra
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907-2045 USA
| | - Xing Sun
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907-2045 USA
| | - Haiyan Wang
- School of Electrical and Computer Engineering, Purdue University West Lafayette Indiana 47907-2045 USA
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907-2045 USA
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