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Jelver L, Cox JD. Nonlinear Plasmonics in Nanostructured Phosphorene. ACS NANO 2023; 17:20043-20052. [PMID: 37791979 DOI: 10.1021/acsnano.3c05363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Phosphorene has emerged as an atomically thin platform for optoelectronics and nanophotonics due to its excellent optical properties and the possibility of actively tuning light-matter interactions through electrical doping. While phosphorene is a two-dimensional semiconductor, plasmon resonances characterized by pronounced anisotropy and strong optical confinement are anticipated to emerge in highly doped samples. Here we show that the localized plasmons supported by phosphorene nanoribbons (PNRs) exhibit high tunability in relation to both edge termination and doping charge polarity and can trigger an intense nonlinear optical response at moderate doping levels. Our explorations are based on a second-principles theoretical framework, employing maximally localized Wannier functions constructed from ab initio electronic structure calculations, which we introduce here to describe the linear and nonlinear optical response of PNRs on mesoscopic length scales. Atomistic simulations reveal the high tunability of plasmons in doped PNRs at near-infrared frequencies, which can facilitate the synergy between the electronic band structure and plasmonic field confinement to drive efficient high-harmonic generation. Our findings establish nanostructured phosphorene as a versatile atomically thin material candidate for nonlinear plasmonics.
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Affiliation(s)
- Line Jelver
- POLIMA─Center for Polariton-driven Light-Matter Interactions, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Joel D Cox
- POLIMA─Center for Polariton-driven Light-Matter Interactions, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
- Danish Institute for Advanced Study, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
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2
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Hsun CH, Chen FC. Bidirectional planar absorber with polarization-selective absorption and transmission capabilities. OPTICS EXPRESS 2023; 31:22928-22953. [PMID: 37475391 DOI: 10.1364/oe.493708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 06/02/2023] [Indexed: 07/22/2023]
Abstract
In this study, we developed a novel planar bidirectional perfect metamaterial absorber (PMA) with polarization-selective absorption and transmission capabilities. The proposed structure can bidirectionally absorb x-polarized incident waves almost perfectly while functioning as a transparent surface for y-polarized incident waves at the same frequency. We discussed the performance and properties of the proposed PMA through simulation results and a theoretical model. We also used the free-space method in experimental tests of a fabricated sample. The results indicated fair consistency between the simulated and measured results, thereby validating the quality of our PMA design.
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3
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Karbalaei Akbari M, Siraj Lopa N, Park J, Zhuiykov S. Plasmonic Nanodomains Decorated on Two-Dimensional Oxide Semiconductors for Photonic-Assisted CO 2 Conversion. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16103675. [PMID: 37241301 DOI: 10.3390/ma16103675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/26/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023]
Abstract
Plasmonic nanostructures ensure the reception and harvesting of visible lights for novel photonic applications. In this area, plasmonic crystalline nanodomains decorated on the surface of two-dimensional (2D) semiconductor materials represent a new class of hybrid nanostructures. These plasmonic nanodomains activate supplementary mechanisms at material heterointerfaces, enabling the transfer of photogenerated charge carriers from plasmonic antennae into adjacent 2D semiconductors and therefore activate a wide range of visible-light assisted applications. Here, the controlled growth of crystalline plasmonic nanodomains on 2D Ga2O3 nanosheets was achieved by sonochemical-assisted synthesis. In this technique, Ag and Se nanodomains grew on 2D surface oxide films of gallium-based alloy. The multiple contribution of plasmonic nanodomains enabled the visible-light-assisted hot-electron generation at 2D plasmonic hybrid interfaces, and therefore considerably altered the photonic properties of the 2D Ga2O3 nanosheets. Specifically, the multiple contribution of semiconductor-plasmonic hybrid 2D heterointerfaces enabled efficient CO2 conversion through combined photocatalysis and triboelectric-activated catalysis. The solar-powered acoustic-activated conversion approach of the present study enabled us to achieve the CO2 conversion efficiency of more than 94% in the reaction chambers containing 2D Ga2O3-Ag nanosheets.
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Affiliation(s)
- Mohammad Karbalaei Akbari
- Department of Solid-State Sciences, Faculty of Science, Ghent University, Krijgslaan 281/S1, 9000 Ghent, Belgium
- Center for Environmental and Energy Research, Ghent University Global Campus, 119-5 Songdomunhwa-ro, Yeonsu-gu, Incheon 21985, Republic of Korea
| | - Nasrin Siraj Lopa
- Department of Solid-State Sciences, Faculty of Science, Ghent University, Krijgslaan 281/S1, 9000 Ghent, Belgium
- Center for Environmental and Energy Research, Ghent University Global Campus, 119-5 Songdomunhwa-ro, Yeonsu-gu, Incheon 21985, Republic of Korea
| | - Jihae Park
- Center for Environmental and Energy Research, Ghent University Global Campus, 119-5 Songdomunhwa-ro, Yeonsu-gu, Incheon 21985, Republic of Korea
- Department of Animal Sciences and Aquatic Ecology, Faculty of Bioscience Engineering, Ghent University, Wetenschapspark 1, Bluebridge, 8400 Oostende, Belgium
| | - Serge Zhuiykov
- Department of Solid-State Sciences, Faculty of Science, Ghent University, Krijgslaan 281/S1, 9000 Ghent, Belgium
- Center for Environmental and Energy Research, Ghent University Global Campus, 119-5 Songdomunhwa-ro, Yeonsu-gu, Incheon 21985, Republic of Korea
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4
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Gao Z, He X, Li W, He Y, Xiong K. Two-dimensional Pd 3(AsSe 4) 2 as a photocatalyst for the solar-driven oxygen evolution reaction: a first-principles study. RSC Adv 2023; 13:11742-11750. [PMID: 37063721 PMCID: PMC10103178 DOI: 10.1039/d3ra00592e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 03/17/2023] [Indexed: 04/18/2023] Open
Abstract
The relationship between the structure and properties of materials is the core of material research. Bulk Pd3(PS4)2 materials have been successfully synthesized in the field of three-dimensional materials. After that, various studies on two-dimensional layered materials were conducted. Inspired by these successes, this work used density functional theory based on first principles to explore similar two-dimensional Pd3(AsX4)2, where X is S, Se, or Te belonging to the same group. Our findings demonstrate that the Pd3(AsS4)2 and Pd3(AsSe4)2 monolayers, with HSE06 band gaps of 2.37 and 1.36 eV, respectively, are indirect semiconductors. Additionally, their carrier mobilities [523.23 cm2 s-1 V-1 and 440.6 cm2 s-1 V-1] are also proved to be superior to MoS2 [∼200 cm2 s-1 V-1]. The optical calculations indicate that the Pd3(AsSe4)2 monolayer yields suitable valence band edge positions for the visible-light-driven water splitting reactions. More interestingly, at a low applied voltage of 0.14 V, Pd3(AsSe4)2 exhibits outstanding oxygen evolution reaction performance. In this study, the possible mechanism for the ability of Pd3(AsSe4)2 monolayer to promote photocatalysis and oxygen evolution was explained, which may pave the way for the practical design of further solar-driven high-quality water splitting photocatalysis.
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Affiliation(s)
- Zhen Gao
- Department of Physics, Yunnan University Kunming 650091 People's Republic of China
| | - Xin He
- Department of Physics, Yunnan University Kunming 650091 People's Republic of China
| | - Wenzhong Li
- Department of Physics, Yunnan University Kunming 650091 People's Republic of China
| | - Yao He
- Department of Physics, Yunnan University Kunming 650091 People's Republic of China
| | - Kai Xiong
- Materials Genome Institute, School of Materials and Energy, Yunnan University Kunming 650091 P. R. China
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5
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Yadav P, Khamari B, Singh B, Adarsh KV, Agarwal A. Fluence dependent dynamics of excitons in monolayer MoSi 2Z 4(Z = pnictogen). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 35:235701. [PMID: 36917860 DOI: 10.1088/1361-648x/acc43f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 03/14/2023] [Indexed: 06/18/2023]
Abstract
Reduced dielectric screening in two-dimensional materials enables bound excitons, which modifies their optical absorption and optoelectronic response. Here, we demonstrate the existence of excitons in the bandgap of the monolayer family of the newly discovered syntheticMoSi2Z4(Z=N, P, and As) series of materials. All three monolayers support several bright and strongly bound excitons with binding energies varying from 1 eV to 1.35 eV for the lowest energy exciton resonances. We show that on increasing the pump fluence or photo-excited carrier density, the lowest energy exciton first undergoes a redshift followed by a blueshift, due to the renormalized exciton binding energies. The exciton binding energy varies as a Lennard-Jones-like potential as a function of the inter-exciton spacing. This establishes an atom-like attractive and repulsive interaction between excitons depending on the inter-exciton separation. Our study shows that theMoSi2Z4series of monolayers offer an exciting test-bed for exploring the physics of strongly bound excitons and their non-equilibrium dynamics.
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Affiliation(s)
- Pushpendra Yadav
- Department of Physics, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Bramhachari Khamari
- Department of Physics, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Bahadur Singh
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Mumbai 400005, India
| | - K V Adarsh
- Department of Physics, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, India
| | - Amit Agarwal
- Department of Physics, Indian Institute of Technology Kanpur, Kanpur 208016, India
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6
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Dehdast M, Neek-Amal M, Stampfl C, Pourfath M. Strain engineering of hyperbolic plasmons in monolayer carbon phosphide: a first-principles study. NANOSCALE 2023; 15:2234-2247. [PMID: 36628616 DOI: 10.1039/d2nr06439a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Natural and tunable in-plane hyperbolic plasmons have so far been elusive, and hence few two-dimensional hyperbolic materials have been theoretically and experimentally discovered. Here, comprehensive first-principles calculations were conducted to study the electronic and plasmonic properties of biaxially strained monolayer carbon phosphide (β-CP). We found that (i) a compressed β-CP hosts strong anisotropic Dirac-shaped fermions with robust modulated Fermi velocity, (ii) for biaxial strain of -3% an unprecedented ultra-wide hyperbolic window is extended continuously from terahertz (9 THz) to mid-visible (blue light, 693 THz), (iii) the tunable optical Van Hove singularity as the origin of hyperbolic plasmons in deformed β-CP is disclosed, (iv) an elliptic to hyperbolic transition in the σ-near-zero regime is demonstrated in terahertz frequencies (9 THz), (v) the propagation angle of the concave wavefront can be actively tuned using biaxial strains, and (vi) hyperbolic dispersion reorientation from one principal axis to another orthogonal one under compressive strains larger than 8% is observed. This study sheds new light on the unique properties of hyperbolic two-dimensional (2D) materials having exotic optoelectronic characteristics which are promising candidates for anisotropic light control with ultimate dexterity in the flat optics.
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Affiliation(s)
- Mahyar Dehdast
- School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran 14395-515, Iran.
| | - Mehdi Neek-Amal
- Department of Physics, Shahid Rajaee Teacher Training University, 16875-163 Lavizan, Tehran, Iran
- Department of Physics, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium
| | - Catherine Stampfl
- School of Physics, The University of Sydney, New South Wales 2006, Australia
| | - Mahdi Pourfath
- School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran 14395-515, Iran.
- Super Computing Institute, University of Tehran, Tehran, Iran
- Institute for Microelectronics, Technische Universität Wien, Gußhausstraße 27-29/E360, A-1040 Wien, Austria
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7
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Al-Bataineh QM, Shpacovitch V, Sadiq D, Telfah A, Hergenröder R. Surface Plasmon Resonance Sensitivity Enhancement Based on Protonated Polyaniline Films Doped by Aluminum Nitrate. BIOSENSORS 2022; 12:bios12121122. [PMID: 36551089 PMCID: PMC9775065 DOI: 10.3390/bios12121122] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/15/2022] [Accepted: 11/30/2022] [Indexed: 05/27/2023]
Abstract
Complex composite films based on polyaniline (PANI) doped hydrochloric acid (HCl) incorporated with aluminum nitrate (Al(NO3)3) on Au-layer were designed and synthesized as a surface plasmon resonance (SPR) sensing device. The physicochemical properties of (PANI-HCl)/Al(NO3)3 complex composite films were studied for various Al(NO3)3 concentrations (0, 2, 4, 8, 16, and 32 wt.%). The refractive index of the (PANI-HCl)/Al(NO3)3 complex composite films increased continuously as Al(NO3)3 concentrations increased. The electrical conductivity values increased from 5.10 µS/cm to 10.00 µS/cm as Al(NO3)3 concentration increased to 32 wt.%. The sensitivity of the SPR sensing device was investigated using a theoretical approach and experimental measurements. The theoretical system of SPR measurement confirmed that increasing Al(NO3)3 in (PANI-HCl)/Al(NO3)3 complex composite films enhanced the sensitivity from about 114.5 [Deg/RIU] for Au-layer to 159.0 [Deg/RIU] for Au-((PANI-HCl)/Al(NO3)3 (32 wt.%)). In addition, the signal-to-noise ratio for Au-layer was 3.95, which increased after coating by (PANI-HCl)/Al(NO3)3 (32 wt.%) complex composite layer to 8.82. Finally, we conclude that coating Au-layer by (PANI-HCl)/Al(NO3)3 complex composite films enhances the sensitivity of the SPR sensing device.
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Affiliation(s)
- Qais M. Al-Bataineh
- Leibniz Institut für Analytische Wissenschaften-ISAS-e.V., Bunsen-Kirchhoff-Straße 11, 44139 Dortmund, Germany
- Experimental Physics, TU Dortmund University, 44227 Dortmund, Germany
| | - Victoria Shpacovitch
- Leibniz Institut für Analytische Wissenschaften-ISAS-e.V., Bunsen-Kirchhoff-Straße 11, 44139 Dortmund, Germany
| | - Diyar Sadiq
- Centre for Material Science and Nanotechnology, Department of Physics, The University of Zakho, Zakho Box. 12, Iraq
| | - Ahmad Telfah
- Leibniz Institut für Analytische Wissenschaften-ISAS-e.V., Bunsen-Kirchhoff-Straße 11, 44139 Dortmund, Germany
- Nanotechnology Center, The University of Jordan, Amman 11942, Jordan
| | - Roland Hergenröder
- Leibniz Institut für Analytische Wissenschaften-ISAS-e.V., Bunsen-Kirchhoff-Straße 11, 44139 Dortmund, Germany
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8
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Zdeg I, Al‐Shami A, Tiouichi G, Absike H, Chaudhary V, Neugebauer P, Nouneh K, Belhboub A, Mounkachi O, El Fatimy A. Electrical Transport Properties of Layered Black Phosphorus grown by Chemical Vapor Transport. CRYSTAL RESEARCH AND TECHNOLOGY 2022. [DOI: 10.1002/crat.202200164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- I. Zdeg
- Institute of Applied Physics Mohammed VI Polytechnic University Lot 660, Hay Moulay Rachid Ben Guerir Benguerir 43150 Morocco
- Complex Systems and Interactions Ecole Centrale Casablanca Bouskoura, Ville Verte Casablanca 27182 Morocco
| | - A. Al‐Shami
- Laboratory of Condensed Matter and Interdisciplinary Sciences LaMCScI, Faculty of Sciences Mohammed V University of Rabat Benguerir 43150 Morocco
| | - G. Tiouichi
- Institute of Applied Physics Mohammed VI Polytechnic University Lot 660, Hay Moulay Rachid Ben Guerir Benguerir 43150 Morocco
- MSDA Mohammed VI Polytechnic University Lot 660, Hay Moulay Rachid Ben Guerir Benguerir 43150 Morocco
| | - H. Absike
- Institute of Applied Physics Mohammed VI Polytechnic University Lot 660, Hay Moulay Rachid Ben Guerir Benguerir 43150 Morocco
| | - V. Chaudhary
- Institute of Applied Physics Mohammed VI Polytechnic University Lot 660, Hay Moulay Rachid Ben Guerir Benguerir 43150 Morocco
- MSDA Mohammed VI Polytechnic University Lot 660, Hay Moulay Rachid Ben Guerir Benguerir 43150 Morocco
| | - P. Neugebauer
- Central European Institute of Technology CEITEC BUT Purkyňova 656/123 Brno 61200 Czech Republic
| | - K. Nouneh
- Laboratory of Material Physics and Subatomic Ibn Tofail University BP 242 Kenitra 14000 Morocco
| | - A. Belhboub
- Complex Systems and Interactions Ecole Centrale Casablanca Bouskoura, Ville Verte Casablanca 27182 Morocco
| | - O. Mounkachi
- Institute of Applied Physics Mohammed VI Polytechnic University Lot 660, Hay Moulay Rachid Ben Guerir Benguerir 43150 Morocco
- Laboratory of Condensed Matter and Interdisciplinary Sciences LaMCScI, Faculty of Sciences Mohammed V University of Rabat Benguerir 43150 Morocco
- MSDA Mohammed VI Polytechnic University Lot 660, Hay Moulay Rachid Ben Guerir Benguerir 43150 Morocco
| | - A. El Fatimy
- Institute of Applied Physics Mohammed VI Polytechnic University Lot 660, Hay Moulay Rachid Ben Guerir Benguerir 43150 Morocco
- Central European Institute of Technology CEITEC BUT Purkyňova 656/123 Brno 61200 Czech Republic
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9
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Ren X, Wang Y, Ji W, Ren M, Wang P, Zhang S, Li S, Zhang C. Possibility of regulating valley-contrasting physics and topological properties by ferroelectricity in functionalized arsenene. Phys Chem Chem Phys 2022; 24:23910-23918. [PMID: 36165573 DOI: 10.1039/d2cp03196e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A two-dimensional (2D) multifunctional material, which couples multiple physical properties together, is both fundamentally intriguing and practically appealing. Here, based on first-principles calculations and tight-binding (TB) model analysis, the possibility of regulating the valley-contrasting physics and nontrivial topological properties via ferroelectricity is investigated in monolayer AsCH2OH. Reversible electric polarization is accessible via the rotation operation on the ligand. The broken inversion symmetry and the spin-orbit coupling (SOC) would lead to valley spin splitting, spin-valley coupling and valley-contrasting Berry curvature. More importantly, the reversal of electric polarization can realize the nonvolatile control of valley-dependent properties. Besides, the nontrivial topological state is confirmed in the monolayer AsCH2OH, which is robust against the rotation operation on the ligand. The magnitude of polarization, valley spin splitting and bulk band gap can be effectively modulated by the biaxial strain. The H-terminated SiC is demonstrated to be an appropriate candidate for encapsulating monolayer AsCH2OH, without affecting its exotic properties. These findings provide insights into the fundamental physics for the coupling of the valley-contrasting phenomenon, topological properties and ferroelectricity, and open avenues for exploiting innovative device applications.
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Affiliation(s)
- Xiaohan Ren
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan, 250022, China.
| | - Yaping Wang
- State Key Lab of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China
| | - Weixiao Ji
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan, 250022, China.
| | - Miaojuan Ren
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan, 250022, China.
| | - Peiji Wang
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan, 250022, China.
| | - Shufeng Zhang
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan, 250022, China.
| | - Shengshi Li
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan, 250022, China.
| | - Changwen Zhang
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan, 250022, China.
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Shi Z, Zhang H, Khan K, Cao R, Zhang Y, Ma C, Tareen AK, Jiang Y, Jin M, Zhang H. Two-dimensional materials toward Terahertz optoelectronic device applications. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C: PHOTOCHEMISTRY REVIEWS 2022. [DOI: 10.1016/j.jphotochemrev.2021.100473] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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11
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Yang H, Konečná A, Xu X, Cheong SW, Garfunkel E, García de Abajo FJ, Batson PE. Low-Loss Tunable Infrared Plasmons in the High-Mobility Perovskite (Ba,La)SnO 3. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2106897. [PMID: 35279954 DOI: 10.1002/smll.202106897] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/06/2022] [Indexed: 06/14/2023]
Abstract
BaSnO3 exhibits the highest carrier mobility among perovskite oxides, making it ideal for oxide electronics. Collective charge carrier oscillations known as plasmons are expected to arise in this material, thus providing a tool to control the nanoscale optical field for optoelectronics applications. Here, the existence of relatively long-lived plasmons supported by high-mobility charge carriers in La-doped BaSnO3 (BLSO) is demonstrated. By exploiting the high spatial and energy resolution of electron energy-loss spectroscopy with a focused beam in a scanning transmission electron microscope, the dispersion, confinement ratio, and damping of infrared localized surface plasmons (LSPs) in BLSO nanoparticles are systematically investigated. It is found that LSPs in BLSO exhibit a high degree of spatial confinement compared to those sustained by noble metals and have relatively low losses and high quality factors with respect to other doped oxides. Further analysis clarifies the relation between plasmon damping and carrier mobility in BLSO. The results support the use of nanostructured degenerate semiconductors for plasmonic applications in the infrared region and establish a solid alternative to more traditional plasmonic materials.
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Affiliation(s)
- Hongbin Yang
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ, USA
| | - Andrea Konečná
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, 08860, Spain
- Central European Institute of Technology, Brno University of Technology, Brno, 61200, Czech Republic
| | - Xianghan Xu
- Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, USA
- Rutgers Center for Emergent Materials, Rutgers University, Piscataway, NJ, USA
| | - Sang-Wook Cheong
- Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, USA
- Rutgers Center for Emergent Materials, Rutgers University, Piscataway, NJ, USA
| | - Eric Garfunkel
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ, USA
- Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, USA
| | - F Javier García de Abajo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, 08860, Spain
- ICREA-Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys 23, Barcelona, 08010, Spain
| | - Philip E Batson
- Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, USA
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12
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Akbari K, Mišković ZL. Directional effects in plasmon excitation and transition radiation from an anisotropic 2D material induced by a fast charged particle. NANOSCALE 2022; 14:5079-5093. [PMID: 35296875 DOI: 10.1039/d1nr06307c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We present a relativistic formulation of the energy loss of a charged particle traversing an anisotropic layer under arbitrary angle of incidence. We use a model for the conductivity tensor describing doped phosphorene, which supports plasmon polariton modes (PPMs) that exhibit a topological transition between elliptic and hyperbolic iso-frequency dispersion curves in the THz to the mid-infrared (MIR) frequency range. The total distribution of the momentum transfer and energy loss of the charged particle goes to excitation of the PPMs followed by their decay in phosphorene (Ohmic losses) and the energy that is emitted as transition radiation (TR). We show that the elliptic modes are efficiently excited in the THz range by relativistic particles, but the corresponding Ohmic distributions do not exhibit significant anisotropy. Contrastingly, hyperbolic modes are efficiently excited in the MIR range by slow particles moving under oblique incidence, producing Ohmic distributions that show strong directionality of propagation with large wavevectors associated with the asymptotes of the hyperbolic dispersion curves. The most dramatic effects of the anisotropic layer conductivity are seen in the angular spectra of the TR, with quite distinct and unexpected shapes of the radiation patterns emitted at the THz and MIR frequencies, even for a normal incidence of the charged particle. Those patterns are substantially skewed for oblique incidence, when they show a marked anisotropy relative to the principal axes of the layer. Such a rich variety of the TR spectra should be readily observable via angle-resolved measurements in a transmission electron microscope.
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Affiliation(s)
- Kamran Akbari
- Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada.
| | - Zoran L Mišković
- Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada.
- Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada
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13
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Yang X, Shen Y, Liu J, Meng X, Gao X, Lv L, Zhou M, Zhang Y, Zheng Y, Zhou Z. Electronic and optical properties of a novel two-dimensional semiconductor material TlPt 2S 3: a first-principles study. Phys Chem Chem Phys 2022; 24:7642-7652. [PMID: 35297434 DOI: 10.1039/d1cp05918a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Two-dimensional (2D) materials have attracted widespread attention due to their unique physical and chemical properties. Here, by using density functional theory calculations, we suggest a novel 2D TlPt2S3 material whose layered bulk counterpart was synthesized in 1973. Theoretical calculation results indicate that the exfoliating energy of monolayer and bilayer TlPt2S3 is 34.96 meV Å-2 and 36.03 meV Å-2. We systematically studied the electronic and optical properties of monolayer and bilayer TlPt2S3, and revealed that they are indirect band gap semiconductors with band gaps of 2.26 eV and 2.10 eV, respectively. Monolayer and bilayer TlPt2S3 exhibit superior carrier mobility (901.63 cm2 V-1 s-1 and 13635.04 cm2 V-1 s-1 for electron mobility of the monolayer and bilayer, respectively) and photocatalytic performance (as high as 1 × 105 light absorption coefficient in the visible light region). Interestingly, we find that monolayer TlPt2S3 has significant hydrogen evolution performance, while in the bilayer, the electron band distribution shows complete oxygen evolution ability, which indicates that the proposed monolayer and bilayer TlPt2S3 are potential novel 2D materials suitable for photocatalytic water splitting driven by visible light.
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Affiliation(s)
- Xin Yang
- School of Physics, Harbin Institute of Technology, Harbin, 150001, P. R. China.
| | - Yanqing Shen
- School of Physics, Harbin Institute of Technology, Harbin, 150001, P. R. China. .,Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Jiajia Liu
- School of Physics, Harbin Institute of Technology, Harbin, 150001, P. R. China.
| | - Xianghui Meng
- School of Physics, Harbin Institute of Technology, Harbin, 150001, P. R. China.
| | - Xu Gao
- School of Physics, Harbin Institute of Technology, Harbin, 150001, P. R. China.
| | - Lingling Lv
- School of Physics, Harbin Institute of Technology, Harbin, 150001, P. R. China.
| | - Min Zhou
- School of Physics, Harbin Institute of Technology, Harbin, 150001, P. R. China.
| | - Yu Zhang
- School of Physics, Harbin Institute of Technology, Harbin, 150001, P. R. China.
| | - Yangdong Zheng
- School of Physics, Harbin Institute of Technology, Harbin, 150001, P. R. China.
| | - Zhongxiang Zhou
- School of Physics, Harbin Institute of Technology, Harbin, 150001, P. R. China. .,Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China
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14
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Matyushkin Y, Danilov S, Moskotin M, Fedorov G, Bochin A, Gorbenko I, Kachorovskii V, Ganichev S. Carbon nanotubes for polarization sensitive terahertz plasmonic interferometry. OPTICS EXPRESS 2021; 29:37189-37199. [PMID: 34808796 DOI: 10.1364/oe.435416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 09/13/2021] [Indexed: 06/13/2023]
Abstract
We report on helicity sensitive photovoltaic terahertz radiation response of a carbon nanotube made in a configuration of a field-effect transistor. We find that the magnitude of the rectified voltage is different for clockwise and anticlockwise circularly polarized radiation. We demonstrate that this effect is a fingerprint of the plasma waves interference in the transistor channel. We also find that the presence of the helicity- and phase-sensitive interference part of the photovoltaic response is a universal phenomenon which is obtained in the systems of different dimensionality with different single-particle spectrum. Its magnitude is a characteristic of the plasma wave decay length. This opens up a wide avenue for applications in the area of plasmonic interferometry.
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15
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Cao J, Fertig HA, Brey L. Quantum Internal Structure of Plasmons. PHYSICAL REVIEW LETTERS 2021; 127:196403. [PMID: 34797157 DOI: 10.1103/physrevlett.127.196403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 10/05/2021] [Indexed: 06/13/2023]
Abstract
Plasmons are usually described in terms of macroscopic quantities such as electric fields and currents. However, as fundamental excitations of metals, they are also quantum objects with internal structure. We demonstrate that this can induce an intrinsic dipole moment which is tied to the quantum geometry of the Hilbert space of plasmon states. This quantum geometric dipole offers a unique handle for manipulation of plasmon dynamics via density modulations and electric fields. As a concrete example, we demonstrate that scattering of plasmons with a nonvanishing quantum geometric dipole from impurities is nonreciprocal, skewing in different directions in a valley-dependent fashion. This internal structure can be used to control plasmon trajectories in two dimensional materials.
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Affiliation(s)
- Jinlyu Cao
- Department of Physics, Indiana University, Bloomington, Indiana 47405, USA and Quantum Science and Engineering Center, Indiana University, Bloomington, Indiana 47408 USA
| | - H A Fertig
- Department of Physics, Indiana University, Bloomington, Indiana 47405, USA and Quantum Science and Engineering Center, Indiana University, Bloomington, Indiana 47408 USA
| | - Luis Brey
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (CSIC), Cantoblanco, 28049 Madrid, Spain
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16
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Cassiano JVV, Martins GB. Electric-field-generated topological states in a silicene nanotube. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:175301. [PMID: 33472181 DOI: 10.1088/1361-648x/abddff] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
Applying an electric field perpendicular to the axis of a silicene armchair nanotube allows us to numerically study the formation of eight topological edge states as silicene's intrinsic spin-orbit gap is closed by the sublattice-staggered electrostatic potential created by the electric field. Following their evolution with electric field, it is revealed that, at very small fields, these eight states are very broad, spin-locked, and sublattice constrained, inheriting their properties from the K and K' states in a silicene two-dimensional honeycomb lattice. Four of those states are centered at the very top of the nanotube and the other four states are centered at the very bottom. As the field increases, each state starts to become narrower and to spread its spectral weight to the other sublattice. With further increase of the field, each state starts to spatially split, while the sublattice spreading continues. Once the spectral weight of each state is distributed evenly among both sublattices, the state has also effectively split into two spatially disconnected parts, after which, further increasing of the field will spread apart the two halves, moving them to the lateral regions of the nanotube, at the same time that the state halves become narrower. This is consistent with the formation of topological edge states, which delimit four ribbon-like topologically different regions: top and bottom topologically trivial 'ribbons' (where the electric field has induced a topological phase transition) that are adjacent to two topologically nontrivial 'ribbons' located at opposing sides of the nanotube. We also briefly access the possibility of observing these edge states by calculating the electronic properties for an electric field configuration that can be more readily produced in the laboratory.
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Affiliation(s)
- J V V Cassiano
- Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, 38400-902, Brazil
| | - G B Martins
- Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, 38400-902, Brazil
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17
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Glavin NR, Rao R, Varshney V, Bianco E, Apte A, Roy A, Ringe E, Ajayan PM. Emerging Applications of Elemental 2D Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1904302. [PMID: 31667920 DOI: 10.1002/adma.201904302] [Citation(s) in RCA: 161] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/08/2019] [Indexed: 05/09/2023]
Abstract
As elemental main group materials (i.e., silicon and germanium) have dominated the field of modern electronics, their monolayer 2D analogues have shown great promise for next-generation electronic materials as well as potential game-changing properties for optoelectronics, energy, and beyond. These atomically thin materials composed of single atomic variants of group III through group VI elements on the periodic table have already demonstrated exciting properties such as near-room-temperature topological insulation in bismuthene, extremely high electron mobilities in phosphorene and silicone, and substantial Li-ion storage capability in borophene. Isolation of these materials within the postgraphene era began with silicene in 2010 and quickly progressed to the experimental identification or theoretical prediction of 15 of the 18 main group elements existing as solids at standard pressure and temperatures. This review first focuses on the significance of defects/functionalization, discussion of different allotropes, and overarching structure-property relationships of 2D main group elemental materials. Then, a complete review of emerging applications in electronics, sensing, spintronics, plasmonics, photodetectors, ultrafast lasers, batteries, supercapacitors, and thermoelectrics is presented by application type, including detailed descriptions of how the material properties may be tailored toward each specific application.
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Affiliation(s)
- Nicholas R Glavin
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, OH, 45433, USA
| | - Rahul Rao
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, OH, 45433, USA
- UES Inc., Beavercreek, OH, 45431, USA
| | - Vikas Varshney
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, OH, 45433, USA
| | - Elisabeth Bianco
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
- Materials Science and Nano Engineering, Rice University, Houston, TX, 77005, USA
| | - Amey Apte
- Materials Science and Nano Engineering, Rice University, Houston, TX, 77005, USA
| | - Ajit Roy
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, OH, 45433, USA
| | - Emilie Ringe
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
- Department of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ, UK
| | - Pulickel M Ajayan
- Materials Science and Nano Engineering, Rice University, Houston, TX, 77005, USA
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18
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Wang H, Li J, Edgar JH, Xu XG. Three-dimensional near-field analysis through peak force scattering-type near-field optical microscopy. NANOSCALE 2020; 12:1817-1825. [PMID: 31899464 DOI: 10.1039/c9nr08417g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Scattering-type scanning near-field optical microscopy (s-SNOM) is instrumental in exploring polaritonic behaviors of two-dimensional (2D) materials at the nanoscale. A sharp s-SNOM tip couples momenta into 2D materials through phase matching to excite phonon polaritons, which manifest as nanoscale interference fringes in raster images. However, s-SNOM lacks the ability to detect the progression of near-field properties along the perpendicular axis to the surface. Here, we perform near-field analysis of a micro-disk and a reflective edge made of isotopically pure hexagonal boron nitride (h-11BN), by using three-dimensional near-field response cubes obtained by peak force scattering-type near-field optical microscopy (PF-SNOM). Momentum quantization of polaritons from the confinement of the circular structure is revealed in situ. Moreover, tip-sample distance is found to be capable of fine-tuning the momentum of polaritons and modifying the superposition of quantized polaritonic modes. The PF-SNOM-based three-dimensional near-field analysis provides detailed characterization capability with a high spatial resolution to fully map three-dimensional near-fields of nano-photonics and polaritonic structures.
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Affiliation(s)
- Haomin Wang
- Department of Chemistry, Lehigh University, Bethlehem, PA 18015, USA.
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19
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Hennighausen Z, Lane C, Benabbas A, Mendez K, Eggenberger M, Champion PM, Robinson JT, Bansil A, Kar S. Oxygen-Induced In Situ Manipulation of the Interlayer Coupling and Exciton Recombination in Bi 2Se 3/MoS 2 2D Heterostructures. ACS APPLIED MATERIALS & INTERFACES 2019; 11:15913-15921. [PMID: 30964277 DOI: 10.1021/acsami.9b02929] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Two-dimensional (2D) heterostructures are more than a sum of the parent 2D materials, but are also a product of the interlayer coupling, which can induce new properties. In this paper, we present a method to tune the interlayer coupling in Bi2Se3/MoS2 2D heterostructures by regulating the oxygen presence in the atmosphere, while applying laser or thermal energy. Our data suggest that the interlayer coupling is tuned through the diffusive intercalation and deintercalation of oxygen molecules. When one layer of Bi2Se3 is grown on monolayer MoS2, an influential interlayer coupling is formed, which quenches the signature photoluminescence (PL) peaks. However, thermally treating in the presence of oxygen disrupts the interlayer coupling, facilitating the emergence of the MoS2 PL peak. Our density functional theory calculations predict that intercalated oxygen increases the interlayer separation ∼17%, disrupting the interlayer coupling and inducing the layers to behave more electronically independent. The interlayer coupling can then be restored by thermally treating in N2 or Ar, where the peaks will requench. Hence, this is an interesting oxygen-induced switching between "non-radiative" and "radiative" exciton recombination. This switching can also be accomplished locally, controllably, and reversibly using a low-power focused laser, while changing the environment from pure N2 to air. This allows for the interlayer coupling to be precisely manipulated with submicron spatial resolution, facilitating site-programmable 2D light-emitting pixels whose emission intensity could be precisely varied by a factor exceeding 200×. Our results show that these atomically thin 2D heterostructures may be excellent candidates for oxygen sensing.
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Affiliation(s)
| | | | | | | | | | | | - Jeremy T Robinson
- Naval Research Laboratory , Washington , District of Columbia 20375 , United States
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20
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Plasmonics for Biosensing. MATERIALS 2019; 12:ma12091411. [PMID: 31052240 PMCID: PMC6539671 DOI: 10.3390/ma12091411] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 04/19/2019] [Accepted: 04/24/2019] [Indexed: 12/14/2022]
Abstract
Techniques based on plasmonic resonance can provide label-free, signal enhanced, and real-time sensing means for bioparticles and bioprocesses at the molecular level. With the development in nanofabrication and material science, plasmonics based on synthesized nanoparticles and manufactured nano-patterns in thin films have been prosperously explored. In this short review, resonance modes, materials, and hybrid functions by simultaneously using electrical conductivity for plasmonic biosensing techniques are exclusively reviewed for designs containing nanovoids in thin films. This type of plasmonic biosensors provide prominent potential to achieve integrated lab-on-a-chip which is capable of transporting and detecting minute of multiple bio-analytes with extremely high sensitivity, selectivity, multi-channel and dynamic monitoring for the next generation of point-of-care devices.
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21
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Verma P, Kuwahara Y, Mori K, Yamashita H. Design of Silver-Based Controlled Nanostructures for Plasmonic Catalysis under Visible Light Irradiation. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20180244] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Priyanka Verma
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yasutaka Kuwahara
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Kyoto 606-8501, Japan
| | - Kohsuke Mori
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Kyoto 606-8501, Japan
- JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Hiromi Yamashita
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Kyoto 606-8501, Japan
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22
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Hou K, Han M, Liu X, Wang J, He Y, Yang S. In situ formation of spherical MoS 2 nanoparticles for ultra-low friction. NANOSCALE 2018; 10:19979-19986. [PMID: 30350834 DOI: 10.1039/c8nr06503a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The motion resistance and energy dissipation of rolling friction are much lower than those of sliding friction at the macroscale. But at the microscale, the impact of rolling on friction remains an open question. Here, we show that spherical MoS2 nanoparticles can be formed in situ at a friction interface by scrolling and wrapping MoS2 nanosheets under the induction of a reciprocating shear stress, when an MoS2 coating constructed from loosely stacked nanosheets is tested in a vacuum of 3.5 × 10-3 Pa. An ultra-low friction state can be readily realized with friction coefficients of 0.004-0.006, which are one order of magnitude lower than that of a pulse laser deposited MoS2 coating without nanoparticles formed in a friction process. Accordingly, the spherical nanoparticles are highlighted as the key factor in the ultra-low friction. Classical molecular dynamics simulations further reveal that the motion mode of the MoS2 nanoparticle is stress-dependent. This finding confirms access to ultra-low friction by introducing rolling friction based on the microstructural evolution of the coating.
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Affiliation(s)
- Kaiming Hou
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
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23
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Cheng G, Wang D, Dai S, Fan X, Wu F, Li X, Zeng C. Nano-imaging of an edge-excited plasmon mode in graphene. NANOSCALE 2018; 10:16314-16320. [PMID: 30129966 DOI: 10.1039/c8nr04623a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The idea of squeezing optical field intensity into nanoscopic dimensions can be achieved through plasmon polaritons, where the prerequisite is to bridge the unmatched momentum of plasmons and free-space photons. Conventionally, complicated subwavelength structures or artificial dipole nanostructures are adopted to impart the necessary momentum for the plasmon excitation. In this work, we show that by using the near-field imaging technique, the plasmon can be launched directly from the edge of graphene lying on the high-κ oxide substrates when illuminated by an infrared light. In addition, we show that such an edge-excited mode can be remarkably tailored by changing the angle between the graphene edge and the incident light field. Further theoretical analysis reveals the strength of the edge-excited mode and its superposition with a tip-excited mode and an edge localized mode. We attribute our findings to the reduced Coulomb scattering and phonon scattering in graphene, allowing the edge-excited mode to be identified. The conceptual edge "antenna" is found to be a very convenient approach to initiate plasmons in two-dimensional systems, which opens up a compelling route for realising nanophotonic applications.
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Affiliation(s)
- Guanghui Cheng
- International Center for Quantum Design of Functional Materials, Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
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24
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Ge W, Li Z, Chen T, Liu M, Lu Y. Extended Near-Infrared Photoactivity of Bi₆Fe 1.9Co 0.1Ti₃O 18 by Upconversion Nanoparticles. NANOMATERIALS 2018; 8:nano8070534. [PMID: 30012944 PMCID: PMC6071231 DOI: 10.3390/nano8070534] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 07/07/2018] [Accepted: 07/10/2018] [Indexed: 11/16/2022]
Abstract
Bi₆Fe1.9Co0.1Ti₃O18 (BFCTO)/NaGdF₄:Yb3+, Er3+ (NGF) nanohybrids were successively synthesized by the hydrothermal process followed by anassembly method, and BFCTO-1.0/NGF nanosheets, BFCTO-1.5/NGF nanoplates and BFCTO-2.0/NGF truncated tetragonal bipyramids were obtained when 1.0, 1.5 and 2.0 M NaOH were adopted, respectively. Under the irradiation of 980 nm light, all the BFCTO samples exhibited no activity in degrading Rhodamine B (RhB). In contrast, with the loading of NGF upconversion nanoparticles, all the BFCTO/NGF samples exhibited extended near-infrared photoactivity, with BFCTO-1.5/NGF showing the best photocatalytic activity, which could be attributed to the effect of {001} and {117} crystal facets with the optimal ratio. In addition, the ferromagnetic properties of the BFCTO/NGF samples indicated their potential as novel, recyclable and efficient near-infrared (NIR) light-driven photocatalysts.
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Affiliation(s)
- Wen Ge
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
- Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Department of Energy and Environmental Science, Ministry of Education, Yunnan Normal University, Kunming 650500, China.
| | - Zhiang Li
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
| | - Tong Chen
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
| | - Min Liu
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
| | - Yalin Lu
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
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25
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Shu GJ, Liou SC, Lin CK, Hayashi M, Chou FC. The dp type π-bond and chiral charge density waves in 1T-TiSe 2. Dalton Trans 2018; 47:16509-16515. [DOI: 10.1039/c8dt03663b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on the atomic electronic configuration and Ti–Se coordination, a valence bond model for the layered transition metal dichalcogenide (TMDC) 1T-TiSe2 is proposed.
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Affiliation(s)
- Guo-Jiun Shu
- Center for Condensed Matter Sciences
- National Taiwan University
- Taipei 10617
- Taiwan
- Department of Materials and Mineral Resources Engineering
| | - Sz-Chian Liou
- AIM Lab
- Nano Center
- University of Maryland
- College Park
- USA
| | - Chih-Kai Lin
- Center for Condensed Matter Sciences
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Michitoshi Hayashi
- Center for Condensed Matter Sciences
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Fang-Cheng Chou
- Center for Condensed Matter Sciences
- National Taiwan University
- Taipei 10617
- Taiwan
- Taiwan Consortium of Emergent Crystalline Materials
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