1
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Liu Y, Deng Q, Yao Z, Liang T, Zhang S, Zhu T, Xing C, Pan J, Yu Z, Liang K, Xie T, Li R, Hou Y. Inducing spin polarization via Co doping in the BiVO 4 cell to enhance the built-in electric field for promotion of photocatalytic CO 2 reduction. J Colloid Interface Sci 2024; 664:500-510. [PMID: 38484518 DOI: 10.1016/j.jcis.2024.03.078] [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: 02/06/2024] [Revised: 02/29/2024] [Accepted: 03/10/2024] [Indexed: 04/07/2024]
Abstract
The efficiency of CO2 photocatalytic reduction is severely limited by inefficient separation and sluggish transfer. In this study, spin polarization was induced and built-in electric field was strengthened via Co doping in the BiVO4 cell to boost photocatalytic CO2 reduction. Results showed that owing to the generation of spin-polarized electrons upon Co doping, carrier separation and photocurrent production of the Co-doped BiVO4 were enhanced. CO production during CO2 photocatalytic reduction from the Co-BiVO4 was 61.6 times of the BiVO4. Notably, application of an external magnetic field (100 mT) further boosted photocatalytic CO2 reduction from the Co-BiVO4, with 68.25 folds improvement of CO production compared to pristine BiVO4. The existence of a built-in electric field (IEF) was demonstrated through density functional theory (DFT) simulations and kelvin probe force microscopy (KPFM). Mechanism insights could be elucidated as follows: doping of magnetic Co into the BiVO4 resulted in increased the number of spin-polarized photo-excited carriers, and application of a magnetic field led to an augmentation of intrinsic electric field due to a dipole shift, thereby extending carrier lifetime and suppressing charges recombination. Additionally, HCOO- was a crucial intermediate in the process of CO2RR, and possible pathways for CO2 reduction were proposed. This study highlights the significance of built-in electric fields and the important role of spin polarization for promotion of photocatalytic CO2 reduction.
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Affiliation(s)
- Yujia Liu
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China; School of Politics and Public Administration, Guangxi Minzu University, Nanning 530006, China
| | - Qucheng Deng
- School of Politics and Public Administration, Guangxi Minzu University, Nanning 530006, China.
| | - Zuofang Yao
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Ting Liang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Shiming Zhang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Tingting Zhu
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Chenchen Xing
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Jinghui Pan
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Zebin Yu
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China; Key Laboratory of Environmental Protection (Guangxi University), Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Keying Liang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Tao Xie
- Beijing SDL Technology Co., Ltd., Beijing 102206, China
| | - Rui Li
- Beijing SDL Technology Co., Ltd., Beijing 102206, China
| | - Yanping Hou
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China; Key Laboratory of Environmental Protection (Guangxi University), Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China.
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Franquesa-Viñas P, Ribas-Ariño J, Santiago R, Deumal M. Enhancing Intramolecular Ferromagnetic Coupling in Tetrathiafulvalene-Nitronyl Nitroxide-Based Compounds through Spin Polarization Mechanism. Chemistry 2024:e202400166. [PMID: 38530333 DOI: 10.1002/chem.202400166] [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: 01/14/2024] [Revised: 03/01/2024] [Accepted: 03/11/2024] [Indexed: 03/27/2024]
Abstract
Spin-polarized donor radicals based on tetrathiafulvalene (TTF) derivatives and nitronyl nitroxide (NN) radicals in which one-electron oxidation involves the HOMO instead of the SOMO are well known for exhibiting magnetoresistance. In particular, BTBN consists of one dibromo-TTF and one NN radical, which are linked by a phenyl coupler group. One of the key factors driving magnetoresistance is the presence of intramolecular ferromagnetic (FM) coupling between the oxidized π-donor (TTF+⋅, D unit) and NN (R unit). Here, a theoretical study is carried out to assess suitable candidates with enhanced FM coupling with respect BTBN, which is thus used as a reference. The study is conducted via in silico chemical modification of the substituents of the BTBN basic functional units (D and R radicals, C coupler) to benefit from the spin polarization mechanism to boost the intramolecular FM coupling, aiming to distort the BTBN radical arrangement within the molecular crystal as little as possible, in the event the material can be synthesized. NICSiso(1) and Wiberg's Bond Order are analyzed to further assist in identifying promising potential candidates, since the decrease in aromaticity is expected to enhance the diradical character and give rise to a larger magnetic coupling value. The most favorable diradical building block to replace the BTBN moiety results from using a hydroxyl-ethylene (-(H)C=C(OH)-) as a coupler preserving BTBN original radicals, namely, NN and TTF+⋅ units. This study aims at illustrating the feasibility of improving the intramolecular FM interaction between radical moieties, which is fully realized, as a first step towards the synthesis of new materials with (possibly) enhanced magnetoresistance properties.
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Affiliation(s)
- Pau Franquesa-Viñas
- Departament de Ciència de Materials i Química Física & IQTCUB, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, E-08028, Barcelona
| | - Jordi Ribas-Ariño
- Departament de Ciència de Materials i Química Física & IQTCUB, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, E-08028, Barcelona
| | - Raul Santiago
- Departament de Ciència de Materials i Química Física & IQTCUB, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, E-08028, Barcelona
| | - Mercè Deumal
- Departament de Ciència de Materials i Química Física & IQTCUB, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, E-08028, Barcelona
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3
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Nahar R, Law KM, Roden T, Zengel M, Lewis J, Budhathoki S, Nold R, Avlani H, Akintunde B, Derksen N, Hauser AJ. Dataset on density functional theory investigation of ternary Heusler alloys. Data Brief 2024; 52:109971. [PMID: 38226030 PMCID: PMC10788214 DOI: 10.1016/j.dib.2023.109971] [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: 10/01/2023] [Revised: 12/08/2023] [Accepted: 12/13/2023] [Indexed: 01/17/2024] Open
Abstract
This paper contains data and results from Density Functional Theory (DFT) investigation of 423 distinct X2YZ ternary full Heusler alloys, where X and Y represent elements from the D-block of the periodic table and Z signifies element from main group. The study encompasses both "regular" and "inverse" Heusler phases of these alloys for a total of 846 potential materials. For each specific alloy and each phase, a range of information is provided including total energy, formation energy, lattice constant, total and site-specific magnetic moments, spin polarization as well as total and projected density of electronic states. The aim of creating this dataset is to provide fundamental theoretical insights into ternary X2YZ Heusler alloys for further theoretical and experimental analysis.
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Affiliation(s)
- Ridwan Nahar
- Department of Physics and Astronomy, University of Alabama, AL, United States
| | - Ka Ming Law
- Department of Physics and Astronomy, University of Alabama, AL, United States
| | - Thomas Roden
- Department of Physics and Astronomy, University of Alabama, AL, United States
| | - Michael Zengel
- Department of Physics and Astronomy, University of Alabama, AL, United States
| | - Justin Lewis
- Department of Physics and Astronomy, University of Alabama, AL, United States
| | - Sujan Budhathoki
- Department of Physics and Astronomy, University of Alabama, AL, United States
| | - Riley Nold
- Department of Physics and Astronomy, University of Alabama, AL, United States
| | - Harshil Avlani
- Department of Physics and Astronomy, University of Alabama, AL, United States
| | - Babajide Akintunde
- Department of Physics and Astronomy, University of Alabama, AL, United States
| | - Naomi Derksen
- Department of Physics and Astronomy, University of Alabama, AL, United States
| | - Adam J. Hauser
- Department of Physics and Astronomy, University of Alabama, AL, United States
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4
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Du Y, Chen W, Wang Y, Yu Y, Guo K, Qu G, Zhang J. Quantum Spin Exchange Interactions to Accelerate the Redox Kinetics in Li-S Batteries. Nanomicro Lett 2024; 16:100. [PMID: 38285199 PMCID: PMC10825106 DOI: 10.1007/s40820-023-01319-8] [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: 08/20/2023] [Accepted: 12/05/2023] [Indexed: 01/30/2024]
Abstract
Spin-engineering with electrocatalysts have been exploited to suppress the "shuttle effect" in Li-S batteries. Spin selection, spin-dependent electron mobility and spin potentials in activation barriers can be optimized as quantum spin exchange interactions leading to a significant reduction of the electronic repulsions in the orbitals of catalysts. Herein, we anchor the MgPc molecules on fluorinated carbon nanotubes (MgPc@FCNT), which exhibits the single active Mg sites with axial displacement. According to the density functional theory calculations, the electronic spin polarization in MgPc@FCNT not only increases the adsorption energy toward LiPSs intermediates but also facilitates the tunneling process of electron in Li-S batteries. As a result, the MgPc@FCNT provides an initial capacity of 6.1 mAh cm-2 even when the high sulfur loading is 4.5 mg cm-2, and still maintains 5.1 mAh cm-2 after 100 cycles. This work provides a new perspective to extend the main group single-atom catalysts enabling high-performance Li-S batteries.
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Affiliation(s)
- Yu Du
- Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Weijie Chen
- Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Yu Wang
- Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Yue Yu
- Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Kai Guo
- Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Gan Qu
- Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China.
| | - Jianan Zhang
- Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China.
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5
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Liu G, Xing X, Wu C, Jin J, Yan M. Interface-induced enhanced room temperature ferromagnetism in hybrid transition metal dichalcogenides. J Colloid Interface Sci 2023; 652:2076-2084. [PMID: 37696061 DOI: 10.1016/j.jcis.2023.09.031] [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: 06/23/2023] [Revised: 08/12/2023] [Accepted: 09/06/2023] [Indexed: 09/13/2023]
Abstract
Magnetic semiconductors with both electron charge and spin features exhibit tremendous potential in spintronics. Although defective transition-metal dichalcogenides are promising with induced room temperature (RT) magnetic moments, impacts of the defect type and underlying mechanisms remain unclear. Herein, two strategies involving elemental substitution and epitaxial growth have been explored to synthesize alloyed and hybrid MoSe2-xSx with lattice distortion and artificial interfaces respectively. Both experimental measurements and first-principle calculations demonstrate induced magnetism in the resultant MoSe2-xSx with the magnetization intensity closely associated to the atomic structure. The alloyed MoSe2-xSx exhibits satisfactory structural stability and atomic magnetic moments due to the Mo 4d orbital splitting induced by lattice distortion. Nevertheless, both enhanced RT ferromagnetism and thermomagnetic stability can be achieved for the hybrid MoSe2-xSx resulted from stronger localized spin polarization at the MoSe2/MoS2 interfaces. As such the work not only sheds light on the mechanisms underlying defect-induced ferromagnetism in transition-metal dichalcogenides, but also proposes an interface engineering strategy to induce significant ferromagnetism for multi-fields including spintronics, multiferroics and valleytronics.
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Affiliation(s)
- Guang Liu
- School of Materials Science and Engineering, State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou 310027, China
| | - Xuejun Xing
- School of Materials Science and Engineering, State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou 310027, China
| | - Chen Wu
- School of Materials Science and Engineering, State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou 310027, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030032, China.
| | - Jiaying Jin
- School of Materials Science and Engineering, State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou 310027, China
| | - Mi Yan
- School of Materials Science and Engineering, State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou 310027, China.
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Jin Z, Zhang J, Qiu J, Hu Y, Di T, Wang T. Nitrogen vacancy-induced spin polarization of ultrathin zinc porphyrin nanosheets for efficient photocatalytic CO 2 reduction. J Colloid Interface Sci 2023; 652:122-131. [PMID: 37591074 DOI: 10.1016/j.jcis.2023.08.025] [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: 05/15/2023] [Revised: 08/01/2023] [Accepted: 08/05/2023] [Indexed: 08/19/2023]
Abstract
Metalloporphyrin compounds have excellent electron transfer and visible light absorption ability, demonstrating broad application prospects in the field of photocatalysis. In this work, the nitrogen vacancies (NVs) were successfully introduced into zinc porphyrin (ZnTCPP) ultrathin nanosheets through surface N2 plasma treatment, which is environmentally friendly and can react in low temperatures. Furthermore, the prepared nitrogen vacancies-zinc porphyrin (NVs-ZnTCPP) materials exhibited excellent photocatalytic CO2 reduction activity and selectivity, specifically, the CO production rate of ZnTCPP-1 (N2 plasma treatment, 1 min) achieved as high as 12.5 µmol g-1h-1, which is about 2.7 times greater than that of untreated ZnTCPP. Based on the experimental and density functional theory calculation (DFT) results, it is found that the promoted photocatalytic performance of NVs-ZnTCPP could be mainly attributed to nitrogen vacancy-induced spin polarization by reducing the reaction barriers and inhibiting the recombination of photoexcited carriers. This work provides a new perspective for the construction of vacancy-based metalloporphyrin, and further explores the intrinsic mechanism between the electron spin property and the performance of the photocatalyst.
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Affiliation(s)
- Zhenxing Jin
- Key Laboratory of Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, PR China
| | - Jun Zhang
- Key Laboratory of Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, PR China.
| | - Jiyu Qiu
- Key Laboratory of Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, PR China
| | - Yuxuan Hu
- Key Laboratory of Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, PR China
| | - Tingmin Di
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, PR China
| | - Tielin Wang
- Key Laboratory of Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, PR China.
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Nair AN, Fernandez S, Marcos-Hernández M, Romo DR, Singamaneni SR, Villagran D, Sreenivasan ST. Spin-Selective Oxygen Evolution Reaction in Chiral Iron Oxide Nanoparticles: Synergistic Impact of Inherent Magnetic Moment and Chirality. Nano Lett 2023; 23:9042-9049. [PMID: 37737823 DOI: 10.1021/acs.nanolett.3c02752] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Electron spin polarization is identified as a promising avenue for enhancing the oxygen evolution reaction (OER), which is the bottleneck that limits the energy efficiency of water-splitting. Here, we report that both ferrimagnetic (f-Fe3O4) and superparamagnetic iron oxide (s-Fe3O4) catalysts can exhibit external magnetic field (Hext)-induced OER enhancement, and the activity is proportional to their intrinsic magnetic moment. Additionally, the chirality-induced spin selectivity (CISS) effect was utilized in synergy with Hext to get a maximum enhancement of up to 89% improvement in current density (at 1.8 V vs RHE) with a low onset potential of 270 mV in s-Fe3O4 catalysts. Spin polarization and the resultant spin selectivity suppress the production of H2O2 and promote the formation of ground state triplet O2 during the OER. Furthermore, the design of chiral s-Fe3O4 with synergistic spin potential effect demonstrates a high spin polarization of ∼42%, as measured using conductive atomic force microscopy (c-AFM).
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Affiliation(s)
- Aruna Narayanan Nair
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Sara Fernandez
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Mariana Marcos-Hernández
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Daniel Rascon Romo
- Department of Physics, The University of Texas at El Paso, El Paso, Texas 79968, United States
| | | | - Dino Villagran
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Sreeprasad T Sreenivasan
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, Texas 79968, United States
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Shen Y, Yao Y, Lu L, Zhu C, Fang Q, Wang J, Song S. Insights into dual effect of missing linker-cluster domain defects for photocatalytic 2e - ORR: Radical reaction and electron behavior. Chemosphere 2023; 324:138220. [PMID: 36842559 DOI: 10.1016/j.chemosphere.2023.138220] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 12/28/2022] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
Photocatalytic 2e- ORR paves a promising avenue for hydrogen peroxide (H2O2) production. However, the obscure structure-activity relationship between a specific structure and photocatalytic 2e- ORR restricts the understanding of its intrinsic mechanism. In this work, Metal-Organic Frameworks (MOFs) with missing linker-cluster domain (MLCD) defects were employed as a model to shed new light on the effect of MLCD defect on photocatalytic 2e- ORR, which mainly focused on the radical reaction and electron behavior. Experiments and theoretical calculations revealed that incorporating MLCD defects significantly lowered the contribution rate of reactive superoxide radical (·O2-). Meanwhile, the retarded interfacial charge transfer via "Ti-O″ bridge was caused by the undesirable electron dissipation and augmented orbital-limited resistance induced by electron spin polarization. Therefore, the photocatalytic 2e- ORR activity was decreased to 30% of its origin by construction MLCD defects. This study provides insights into the internal mechanism of photocatalytic 2e- ORR for designing and optimizing excellent defective nanomaterials.
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Affiliation(s)
- Yi Shen
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310032, PR China.
| | - Yanchi Yao
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310032, PR China
| | - Lun Lu
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, PR China
| | - Chao Zhu
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310032, PR China; College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, PR China.
| | - Qile Fang
- Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai, 519087, PR China
| | - Jun Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, PR China
| | - Shuang Song
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, 310032, PR China
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9
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Lai YS, Chen YL, Lin CC, Su YH. Ultrafast chiral peptides purification via surface plasmon enhanced spin selectivity. Biosens Bioelectron 2022; 211:114339. [PMID: 35588636 DOI: 10.1016/j.bios.2022.114339] [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: 03/15/2022] [Accepted: 05/02/2022] [Indexed: 11/17/2022]
Abstract
By D-arginine and L-arginine chiral peptides induced spin selectivity and Au NPs enhanced spin polarization, chiral peptides purification has been effectively simplified and the purification performance has raised from a mixture system. The angular momentums of light are operated by the polarizer and wave plates. Au NPs decorated ZnO nanorods electrodes are utilized to modulate the polarization of spintronic. Seed growth methods are for synthesizing spherical Au NPs. UV light reduction methods are for urchin-liked Au NPs. Au NPs are decorated on ZnO nanorods electrodes for rising photon to electron conversion efficiency and enhancing spin polarization rates by surface plasmon effect. From our results, photon to the electron conversion efficiency of ZnO nanorods electrodes has effectively enhanced by urchin-liked Au NPs decorating. Ultrahigh localized plasmon conversion efficiency as high as 60% was also obtained. Besides, density functional theory (DFT) calculations simulated the force on spintronic. Since the D-arginine and L-arginine are on Au substrate, DFT results demonstrate different angular momentum and spin polarization coupling. Along with urchin-liked Au NPs rising chiral induced spin polarization by surface plasmon resonance, the sensitivity of chiral arginine has been raised around 5000% from bare ZnO nanorods electrodes. The purification and separation time of a specific chiral arginine only needs 5 min.
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Affiliation(s)
- Yi-Sheng Lai
- Department of Material Science and Engineering, National Cheng Kung University, Taiwan
| | - Yu-Lin Chen
- Department of Material Science and Engineering, National Cheng Kung University, Taiwan
| | - Chia-Chun Lin
- Department of Material Science and Engineering, National Cheng Kung University, Taiwan
| | - Yen-Hsun Su
- Department of Material Science and Engineering, National Cheng Kung University, Taiwan.
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Huizi-Rayo U, Gutierrez J, Seco JM, Mujica V, Diez-Perez I, Ugalde JM, Tercjak A, Cepeda J, San Sebastian E. An Ideal Spin Filter: Long-Range, High-Spin Selectivity in Chiral Helicoidal 3-Dimensional Metal Organic Frameworks. Nano Lett 2020; 20:8476-8482. [PMID: 33170013 DOI: 10.1021/acs.nanolett.0c02349] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
An enantiopure, conductive, and paramagnetic crystalline 3-D metal-organic framework (MOF), based on Dy(III) and the l-tartrate chiral ligand, is proved to behave as an almost ideal electron spin filtering material at room temperature, transmitting one spin component only, leading to a spin polarization (SP) power close to 100% in the ±2 V range, which is conserved over a long spatial range, larger than 1 μm in some cases. This impressive spin polarization capacity of this class of nanostructured materials is measured by means of magnetically polarized conductive atomic force microscopy and is attributed to the Chirality-Induced Spin Selectivity (CISS) effect of the material arising from a multidimensional helicity pattern, the inherited chirality of the organic motive, and the enhancing influence of Dy(III) ions on the CISS effect, with large spin-orbit coupling values. Our results represent the first example of a MOF-based and CISS-effect-mediated spin filtering material that shows a nearly perfect SP. These striking results obtained with our robust and easy-to-synthesize chiral MOFs constitute an important step forward in to improve the performance of spin filtering materials for spintronic device fabrication.
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Affiliation(s)
- Uxua Huizi-Rayo
- Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco (UPV/EHU), 20018 Donostia, Spain
| | - Junkal Gutierrez
- Group "Materials+Technologies" (GMT), Department of Chemical and Environmental Engineering, Faculty of Engineering Gipuzkoa, University of the Basque Country (UPV/EHU), Plaza Europa 1, 20018 Donostia-San Sebastian, Spain
- Department of Chemical and Environmental Engineering, Faculty of Engineering Vitoria-Gasteiz, University of the Basque Country (UPV/EHU), C/Nieves Cano 12, 01006 Vitoria-Gasteiz, Spain
| | - Jose Manuel Seco
- Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco (UPV/EHU), 20018 Donostia, Spain
| | - Vladimiro Mujica
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
- Ikerbasque, Basque Foundation for Science, 48011 Bilbao, Spain
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
| | - Ismael Diez-Perez
- Department of Chemistry, Faculty of Natural & Mathematical Sciences, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K
| | - Jesus M Ugalde
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
| | - Agnieszka Tercjak
- Group "Materials+Technologies" (GMT), Department of Chemical and Environmental Engineering, Faculty of Engineering Gipuzkoa, University of the Basque Country (UPV/EHU), Plaza Europa 1, 20018 Donostia-San Sebastian, Spain
| | - Javier Cepeda
- Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco (UPV/EHU), 20018 Donostia, Spain
| | - Eider San Sebastian
- Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco (UPV/EHU), 20018 Donostia, Spain
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Anishchik SV, Ivanov KL. A method for simulating level anti-crossing spectra of diamond crystals containing NV - color centers. J Magn Reson 2019; 305:67-76. [PMID: 31229755 DOI: 10.1016/j.jmr.2019.06.002] [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: 04/09/2019] [Revised: 06/01/2019] [Accepted: 06/03/2019] [Indexed: 06/09/2023]
Abstract
We propose an efficient method for calculating level anti-crossing spectra (LAC spectra) of interacting paramagnetic defect centers in crystals. By LAC spectra we mean the magnetic field dependence of the photoluminescence intensity of paramagnetic color centers: such field dependences often exhibit sharp features, such as peaks or dips, originating from LACs in the spin system. Our approach takes into account the electronic Zeeman interaction with the external magnetic field, dipole-dipole interaction of paramagnetic centers, hyperfine coupling of paramagnetic defects to magnetic nuclei and zero-field splitting. By using this method, not only can we obtain the positions of lines in LAC spectra, but also reproduce their shapes as well as the relative amplitudes of different lines. As a striking example, we present a calculation of LAC spectra in diamond crystals containing negatively charged NV centers.
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Affiliation(s)
- S V Anishchik
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 630090 Novosibirsk, Russia.
| | - K L Ivanov
- International Tomography Center SB RAS, 630090 Novosibirsk, Russia; Novosibirsk State University, 630090 Novosibirsk, Russia.
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Xu XT, Yi CR, Wang BZ, Sun W, Deng Y, Liu XJ, Chen S, Pan JW. Precision mapping the topological bands of 2D spin-orbit coupling with microwave spin-injection spectroscopy. Sci Bull (Beijing) 2018; 63:1464-9. [PMID: 36658827 DOI: 10.1016/j.scib.2018.11.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/20/2018] [Accepted: 11/05/2018] [Indexed: 01/21/2023]
Abstract
To investigate the band structure is one of the key approaches to study the fundamental properties of a novel material. We report here the precision band mapping of a 2-dimensional (2D) spin-orbit (SO) coupling in an optical lattice. By applying the microwave spin-injection spectroscopy, the band structure and spin-polarization distribution are achieved simultaneously. The band topology is also addressed with observing the band gap close and re-open at the Dirac points. Furthermore, the lattice depth and the Raman coupling strength are precisely calibrated with relative errors in the order of 10-3. Our approach could also be applied for exploring the exotic topological phases with even higher dimensional system.
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Lu WT, Li YF, Tian HY. Spin- and Valley-Dependent Electronic Structure in Silicene Under Periodic Potentials. Nanoscale Res Lett 2018; 13:84. [PMID: 29569067 PMCID: PMC5864580 DOI: 10.1186/s11671-018-2495-4] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Accepted: 03/09/2018] [Indexed: 06/08/2023]
Abstract
We study the spin- and valley-dependent energy band and transport property of silicene under a periodic potential, where both spin and valley degeneracies are lifted. It is found that the Dirac point, miniband, band gap, anisotropic velocity, and conductance strongly depend on the spin and valley indices. The extra Dirac points appear as the voltage potential increases, the critical values of which are different for electron with different spins and valleys. Interestingly, the velocity is greatly suppressed due to the electric field and exchange field, other than the gapless graphene. It is possible to achieve an excellent collimation effect for a specific spin near a specific valley. The spin- and valley-dependent band structure can be used to adjust the transport, and perfect transmissions are observed at Dirac points. Therefore, a remarkable spin and valley polarization is achieved which can be switched effectively by the structural parameters. Importantly, the spin and valley polarizations are greatly enhanced by the disorder of the periodic potential.
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Affiliation(s)
- Wei-Tao Lu
- School of Physics and Electronic Engineering, Linyi University, Linyi, 276005, China.
| | - Yun-Fang Li
- School of Mechanical & Vehicle Engineering, Linyi University, Linyi, 276005, China
| | - Hong-Yu Tian
- School of Physics and Electronic Engineering, Linyi University, Linyi, 276005, China.
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Six JS, Hughes-Riley T, Lilburn DML, Dorkes AC, Stupic KF, Shaw DE, Morris PG, Hall IP, Pavlovskaya GE, Meersmann T. Pulmonary MRI contrast using Surface Quadrupolar Relaxation (SQUARE) of hyperpolarized (83)Kr. Magn Reson Imaging 2013; 32:48-53. [PMID: 24144493 PMCID: PMC3898897 DOI: 10.1016/j.mri.2013.08.007] [Citation(s) in RCA: 9] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 08/08/2013] [Accepted: 08/20/2013] [Indexed: 11/24/2022]
Abstract
Hyperpolarized 83Kr has previously been demonstrated to enable MRI contrast that is sensitive to the chemical composition of the surface in a porous model system. Methodological advances have lead to a substantial increase in the 83Kr hyperpolarization and the resulting signal intensity. Using the improved methodology for spin exchange optical pumping of isotopically enriched 83Kr, internal anatomical details of ex vivo rodent lung were resolved with hyperpolarized 83Kr MRI after krypton inhalation. Different 83Kr relaxation times were found between the main bronchi and the parenchymal regions in ex vivo rat lungs. The T1 weighted hyperpolarized 83Kr MRI provided a first demonstration of surface quadrupolar relaxation (SQUARE) pulmonary MRI contrast.
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Affiliation(s)
- Joseph S Six
- Sir Peter Mansfield Magnetic Resonance Centre, University of Nottingham, Nottingham NG7 2RD, UK; School of Medicine, University of Nottingham, Nottingham NG7 2UH, UK
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