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Horák M, Čalkovský V, Mach J, Křápek V, Šikola T. Plasmonic Properties of Individual Gallium Nanoparticles. J Phys Chem Lett 2023; 14:2012-2019. [PMID: 36794890 PMCID: PMC10017019 DOI: 10.1021/acs.jpclett.3c00094] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
Gallium is a plasmonic material offering ultraviolet to near-infrared tunability, facile and scalable preparation, and good stability of nanoparticles. In this work, we experimentally demonstrate the link between the shape and size of individual gallium nanoparticles and their optical properties. To this end, we utilize scanning transmission electron microscopy combined with electron energy loss spectroscopy. Lens-shaped gallium nanoparticles with a diameter between 10 and 200 nm were grown directly on a silicon nitride membrane using an effusion cell developed in house that was operated under ultra-high-vacuum conditions. We have experimentally proven that they support localized surface plasmon resonances and their dipole mode can be tuned through their size from the ultraviolet to near-infrared spectral region. The measurements are supported by numerical simulations using realistic particle shapes and sizes. Our results pave the way for future applications of gallium nanoparticles such as hyperspectral absorption of sunlight in energy harvesting or plasmon-enhanced luminescence of ultraviolet emitters.
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Affiliation(s)
- Michal Horák
- Central
European Institute of Technology, Brno University
of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
| | - Vojtěch Čalkovský
- Central
European Institute of Technology, Brno University
of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
- Institute
of Physical Engineering, Brno University
of Technology, Technická 2, 616 69 Brno, Czech Republic
| | - Jindřich Mach
- Central
European Institute of Technology, Brno University
of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
- Institute
of Physical Engineering, Brno University
of Technology, Technická 2, 616 69 Brno, Czech Republic
| | - Vlastimil Křápek
- Central
European Institute of Technology, Brno University
of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
- Institute
of Physical Engineering, Brno University
of Technology, Technická 2, 616 69 Brno, Czech Republic
| | - Tomáš Šikola
- Central
European Institute of Technology, Brno University
of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
- Institute
of Physical Engineering, Brno University
of Technology, Technická 2, 616 69 Brno, Czech Republic
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2
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Liu PQ, Miao X, Datta S. Recent Advances in Liquid Metal Photonics: Technologies and Applications. OPTICAL MATERIALS EXPRESS 2023; 13:699-727. [PMID: 38249122 PMCID: PMC10798671 DOI: 10.1364/ome.484236] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 02/09/2023] [Indexed: 01/23/2024]
Abstract
Near-room-temperature liquid metals offer unique and crucial advantages over solid metals for a broad range of applications which require soft, stretchable and/or reconfigurable structures and devices. In particular, gallium-based liquid metals are the most suitable for a wide range of applications, not only owing to their low melting points, but also thanks to their low toxicity and negligible vapor pressure. In addition, gallium-based liquid metals exhibit attractive optical properties which make them highly suitable for a variety of photonics applications. This review summarizes the material properties of gallium-based liquid metals, highlights several effective techniques for fabricating liquid-metal-based structures and devices, and then focuses on the various photonics applications of these liquid metals in different spectral regions, following with a discussion on the challenges and opportunities for future research in this relatively nascent field.
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Affiliation(s)
- Peter Q. Liu
- Department of Electrical Engineering, University at Buffalo, the State University of New York, Buffalo, NY 14260, USA
| | - Xianglong Miao
- Department of Electrical Engineering, University at Buffalo, the State University of New York, Buffalo, NY 14260, USA
| | - Shreyan Datta
- Department of Electrical Engineering, University at Buffalo, the State University of New York, Buffalo, NY 14260, USA
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3
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Abstract
Solar-to-chemical energy conversion via heterogeneous photocatalysis is one of the sustainable approaches to tackle the growing environmental and energy challenges. Among various promising photocatalytic materials, plasmonic-driven photocatalysts feature prominent solar-driven surface plasmon resonance (SPR). Non-noble plasmonic metals (NNPMs)-based photocatalysts have been identified as a unique alternative to noble metal-based ones due to their advantages like earth-abundance, cost-effectiveness, and large-scale application capability. This review comprehensively summarizes the most recent advances in the synthesis, characterization, and properties of NNPMs-based photocatalysts. After introducing the fundamental principles of SPR, the attributes and functionalities of NNPMs in governing surface/interfacial photocatalytic processes are presented. Next, the utilization of NNPMs-based photocatalytic materials for the removal of pollutants, water splitting, CO2 reduction, and organic transformations is discussed. The review concludes with current challenges and perspectives in advancing the NNPMs-based photocatalysts, which are timely and important to plasmon-based photocatalysis, a truly interdisciplinary field across materials science, chemistry, and physics.
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Affiliation(s)
- Mahmoud Sayed
- Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, P.R. China.,Chemistry Department, Faculty of Science, Fayoum University, Fayoum 63514, Egypt.,State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, P.R. China
| | - Jiaguo Yu
- Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, P.R. China.,State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, P.R. China.,College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, Hunan, P.R. China
| | - Gang Liu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P.R. China
| | - Mietek Jaroniec
- Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44242, United States
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4
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Chen CY, Chien CY, Wang CM, Lin RS, Chen IC. Plasmon Tuning of Liquid Gallium Nanoparticles through Surface Anodization. MATERIALS 2022; 15:ma15062145. [PMID: 35329596 PMCID: PMC8948849 DOI: 10.3390/ma15062145] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/08/2022] [Accepted: 03/11/2022] [Indexed: 02/04/2023]
Abstract
In this work, tunable plasmonic liquid gallium nanoparticles (Ga NPs) were prepared through surface anodizing of the particles. Shape deformation of the Ga NPs accompanied with dimpled surface topographies could be induced during electrochemical anodization, and the formation of the anodic oxide shell helps maintain the resulting change in the particle shape. The nanoscale dimple-like textures led to changes in the localized surface plasmon resonance (LSPR) wavelength. A maximal LSPR red-shift of ~77 nm was preliminarily achieved using an anodization voltage of 0.7 V. The experimental results showed that an increase in the oxide shell thickness yielded a negligible difference in the observed LSPR, and finite-difference time-domain (FDTD) simulations also suggested that the LSPR tunability was primarily determined by the shape of the deformed particles. The extent of particle deformation could be adjusted in a very short period of anodization time (~7 s), which offers an efficient way to tune the LSPR response of Ga NPs.
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Affiliation(s)
- Chih-Yao Chen
- Institute of Materials Science and Engineering, National Central University, Zhongli 320, Taiwan; (C.-Y.C.); (C.-Y.C.)
| | - Ching-Yun Chien
- Institute of Materials Science and Engineering, National Central University, Zhongli 320, Taiwan; (C.-Y.C.); (C.-Y.C.)
| | - Chih-Ming Wang
- Department of Optics and Photonics, National Central University, Zhongli 320, Taiwan; (C.-M.W.); (R.-S.L.)
| | - Rong-Sheng Lin
- Department of Optics and Photonics, National Central University, Zhongli 320, Taiwan; (C.-M.W.); (R.-S.L.)
| | - I-Chen Chen
- Institute of Materials Science and Engineering, National Central University, Zhongli 320, Taiwan; (C.-Y.C.); (C.-Y.C.)
- Correspondence:
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5
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Catalán-Gómez S, Bran C, Vázquez M, Vázquez L, Pau JL, Redondo-Cubero A. Plasmonic coupling in closed-packed ordered gallium nanoparticles. Sci Rep 2020; 10:4187. [PMID: 32144349 PMCID: PMC7060194 DOI: 10.1038/s41598-020-61090-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 02/18/2020] [Indexed: 12/17/2022] Open
Abstract
Plasmonic gallium (Ga) nanoparticles (NPs) are well known to exhibit good performance in numerous applications such as surface enhanced fluorescence and Raman spectroscopy or biosensing. However, to reach the optimal optical performance, the strength of the localized surface plasmon resonances (LSPRs) must be enhanced particularly by suitable narrowing the NP size distribution among other factors. With this purpose, our last work demonstrated the production of hexagonal ordered arrays of Ga NPs by using templates of aluminium (Al) shallow pit arrays, whose LSPRs were observed in the VIS region. The quantitative analysis of the optical properties by spectroscopic ellipsometry confirmed an outstanding improvement of the LSPR intensity and full width at half maximum (FWHM) due to the imposed ordering. Here, by engineering the template dimensions, and therefore by tuning Ga NPs size, we expand the LSPRs of the Ga NPs to cover a wider range of the electromagnetic spectrum from the UV to the IR regions. More interestingly, the factors that cause this optical performance improvement are studied with the universal plasmon ruler equation, supported with discrete dipole approximation simulations. The results allow us to conclude that the plasmonic coupling between NPs originated in the ordered systems is the main cause for the optimized optical response.
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Affiliation(s)
- S Catalán-Gómez
- Grupo de Electrónica y Semiconductores, Departamento de Física Aplicada, Universidad Autónoma de Madrid, Cantoblanco, E-28049, Madrid, Spain.
| | - C Bran
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), Cantoblanco, E-28049, Madrid, Spain
| | - M Vázquez
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), Cantoblanco, E-28049, Madrid, Spain
| | - L Vázquez
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), Cantoblanco, E-28049, Madrid, Spain
| | - J L Pau
- Grupo de Electrónica y Semiconductores, Departamento de Física Aplicada, Universidad Autónoma de Madrid, Cantoblanco, E-28049, Madrid, Spain
| | - A Redondo-Cubero
- Grupo de Electrónica y Semiconductores, Departamento de Física Aplicada, Universidad Autónoma de Madrid, Cantoblanco, E-28049, Madrid, Spain
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6
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Song H, Kim T, Kang S, Jin H, Lee K, Yoon HJ. Ga-Based Liquid Metal Micro/Nanoparticles: Recent Advances and Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1903391. [PMID: 31583849 DOI: 10.1002/smll.201903391] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 08/21/2019] [Indexed: 05/20/2023]
Abstract
Liquid metals are emerging as fluidic inorganic materials in various research fields. Micro- and nanoparticles of Ga and its alloys have received particular attention in the last decade due to their non toxicity and accessibility in ambient conditions as well as their interesting chemical, physical, mechanical, and electrical properties. Unique features such as a fluidic nature and self-passivating oxide skin make Ga-based liquid metal particles (LMPs) distinguishable from conventional inorganic particles in the context of synthesis and applications. Here, recent advances in the bottom-up and top-down synthetic methods of Ga-based LMPs, their physicochemical properties, and their applications are summarized. Finally, the current status of the LMPs is highlighted and perspectives on future directions are also provided.
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Affiliation(s)
- Hyunsun Song
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Taekyung Kim
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Seohyun Kang
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Haneul Jin
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Kwangyeol Lee
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Hyo Jae Yoon
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
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7
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Catalán-Gómez S, Redondo-Cubero A, Palomares FJ, Vázquez L, Nogales E, Nucciarelli F, Méndez B, Gordillo N, Pau JL. Size-selective breaking of the core-shell structure of gallium nanoparticles. NANOTECHNOLOGY 2018; 29:355707. [PMID: 29888710 DOI: 10.1088/1361-6528/aacb91] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Core-shell gallium nanoparticles (Ga NPs) have recently been proposed as an ultraviolet plasmonic material for different applications but only at room temperature. Here, the thermal stability as a function of the size of the NPs is reported over a wide range of temperatures. We analyze the chemical and structural properties of the oxide shell by x-ray photoelectron spectroscopy and atomic force microscopy. We demonstrate the inverse dependence of the shell breaking temperature with the size of the NPs. Spectroscopic ellipsometry is used for tracking the rupture and its mechanism is systematically investigated by scanning electron microscopy, grazing incidence x-ray diffraction and cathodoluminescence. Taking advantage of the thermal stability of the NPs, we perform complete oxidations that lead to homogenous gallium oxide NPs. Thus, this study set the physical limits of Ga NPs to last at high temperatures, and opens up the possibility to achieve totally oxidized NPs while keeping their sphericity.
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Affiliation(s)
- S Catalán-Gómez
- Grupo de Electrónica y Semiconductores, Departamento de Física Aplicada, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
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8
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Catalán-Gómez S, Redondo-Cubero A, Palomares FJ, Nucciarelli F, Pau JL. Tunable plasmonic resonance of gallium nanoparticles by thermal oxidation at low temperaturas. NANOTECHNOLOGY 2017; 28:405705. [PMID: 28787277 DOI: 10.1088/1361-6528/aa8505] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The effect of the oxidation of gallium nanoparticles (Ga NPs) on their plasmonic properties is investigated. Discrete dipole approximation has been used to study the wavelength of the out-of-plane localized surface plasmon resonance in hemispherical Ga NPs, deposited on silicon substrates, with oxide shell (Ga2O3) of different thickness. Thermal oxidation treatments, varying temperature and time, were carried out in order to increase experimentally the Ga2O3 shell thickness in the NPs. The optical, structural and chemical properties of the oxidized NPs have been studied by spectroscopic ellipsometry, scanning electron microscopy, grazing incidence x-ray diffraction and x-ray photoelectron spectroscopy. A clear redshift of the peak wavelength is observed, barely affecting the intensity of the plasmon resonance. A controllable increase of the Ga2O3 thickness as a consequence of the thermal annealing is achieved. In addition, simulations together with ellipsometry results have been used to determine the oxidation rate, whose kinetics is governed by a logarithmic dependence. These results support the tunable properties of the plasmon resonance wavelength in Ga NPs by thermal oxidation at low temperatures without significant reduction of the plasmon resonance intensity.
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Affiliation(s)
- S Catalán-Gómez
- Grupo de Electrónica y Semiconductores, Departamento de Física Aplicada, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
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9
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Losurdo M, Suvorova A, Rubanov S, Hingerl K, Brown AS. Thermally stable coexistence of liquid and solid phases in gallium nanoparticles. NATURE MATERIALS 2016; 15:995-1002. [PMID: 27454047 DOI: 10.1038/nmat4705] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 06/21/2016] [Indexed: 06/06/2023]
Abstract
Gallium (Ga), a group III metal, is of fundamental interest due to its polymorphism and unusual phase transition behaviours. New solid phases have been observed when Ga is confined at the nanoscale. Herein, we demonstrate the stable coexistence, from 180 K to 800 K, of the unexpected solid γ-phase core and a liquid shell in substrate-supported Ga nanoparticles. We show that the support plays a fundamental role in determining Ga nanoparticle phases, with the driving forces for the nucleation of the γ-phase being the Laplace pressure in the nanoparticles and the epitaxial relationship of this phase to the substrate. We exploit the change in the amplitude of the evolving surface plasmon resonance of Ga nanoparticle ensembles during synthesis to reveal in real time the solid core formation in the liquid Ga nanoparticle. Finally, we provide a general framework for understanding how nanoscale confinement, interfacial and surface energies, and crystalline relationships to the substrate enable and stabilize the coexistence of unexpected phases.
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Affiliation(s)
- Maria Losurdo
- Institute of Nanotechnology, CNR-NANOTEC, via Orabona 4, 70126 Bari, Italy
| | - Alexandra Suvorova
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Sergey Rubanov
- Bio21 Institute, University of Melbourne, 161 Barry Street, Parkville 3010, Victoria, Australia
| | - Kurt Hingerl
- Center for Surface- and Nanoanalytics, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
| | - April S Brown
- Army Research Office, Engineering Sciences Directorate, Durham, North Carolina 27708, USA
- Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA
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10
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Knight MW, Coenen T, Yang Y, Brenny BJM, Losurdo M, Brown AS, Everitt HO, Polman A. Gallium plasmonics: deep subwavelength spectroscopic imaging of single and interacting gallium nanoparticles. ACS NANO 2015; 9:2049-2060. [PMID: 25629392 DOI: 10.1021/nn5072254] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Gallium has recently been demonstrated as a phase-change plasmonic material offering UV tunability, facile synthesis, and a remarkable stability due to its thin, self-terminating native oxide. However, the dense irregular nanoparticle (NP) ensembles fabricated by molecular-beam epitaxy make optical measurements of individual particles challenging. Here we employ hyperspectral cathodoluminescence (CL) microscopy to characterize the response of single Ga NPs of various sizes within an irregular ensemble by spatially and spectrally resolving both in-plane and out-of-plane plasmonic modes. These modes, which include hybridized dipolar and higher-order terms due to phase retardation and substrate interactions, are correlated with finite difference time domain (FDTD) electrodynamics calculations that consider the Ga NP contact angle, substrate, and native Ga/Si surface oxidation. This study experimentally confirms previous theoretical predictions of plasmonic size-tunability in single Ga NPs and demonstrates that the plasmonic modes of interacting Ga nanoparticles can hybridize to produce strong hot spots in the ultraviolet. The controlled, robust UV plasmonic resonances of gallium nanoparticles are applicable to energy- and phase-specific applications such as optical memory, environmental remediation, and simultaneous fluorescence and surface-enhanced Raman spectroscopies.
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Affiliation(s)
- Mark W Knight
- Center for Nanophotonics, FOM Institute AMOLF , Science Park Amsterdam 104, 1098 XG Amsterdam, The Netherlands
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11
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McMahon JM, Schatz GC, Gray SK. Correction: Plasmonics in the ultraviolet with the poor metals Al, Ga, In, Sn, Tl, Pb, and Bi. Phys Chem Chem Phys 2015; 17:19670-1. [DOI: 10.1039/c5cp90112j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correction for ‘Plasmonics in the ultraviolet with the poor metals Al, Ga, In, Sn, Tl, Pb, and Bi’ by Jeffrey M. McMahon et al., Phys. Chem. Chem. Phys., 2013, 15, 5415–5423.
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Affiliation(s)
- Jeffrey M. McMahon
- Department of Chemistry
- Northwestern University
- Evanston
- USA
- Center for Nanoscale Materials
| | | | - Stephen K. Gray
- Center for Nanoscale Materials
- Argonne National Laboratory
- Argonne
- USA
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12
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Schulze RK, Wallace DC, Lashley JC. Density of states features in some anomalous melting elements. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2013; 25:465107. [PMID: 24153325 DOI: 10.1088/0953-8984/25/46/465107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Valence band photoemission measurements have been made on crystalline and supercooled liquid gallium, and across the liquid and solid phases of bismuth and indium. Measurements are angle integrated and made using photon excitations of 21.21 and 40.81 eV. In all cases the Bloch states are destroyed upon melting and the free electron gas is constrained by a charge-neutral liquid. The spectra of indium show little change upon solidification, indicating a common electronic structure for crystalline and liquid phases. In contrast, the energy distribution curves for supercooled gallium and bismuth show large changes in the electronic structure from solid to liquid phases, giving rise to the formation of pseudogaps in the density of states at the Fermi energy, EF. Observations of this kind enable us to distinguish normal or anomalous melting from photoemission measurements.
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Affiliation(s)
- R K Schulze
- Los Alamos National Laboratory, P.O. Box 1663 Bikini Atoll Road, Los Alamos, NM 87545, USA
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13
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McMahon JM, Schatz GC, Gray SK. Plasmonics in the ultraviolet with the poor metals Al, Ga, In, Sn, Tl, Pb, and Bi. Phys Chem Chem Phys 2013; 15:5415-23. [DOI: 10.1039/c3cp43856b] [Citation(s) in RCA: 266] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Zhu ZY, Cheng YC, Schwingenschlögl U. The origin of the pseudogap in α-Ga. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:475502. [PMID: 22075974 DOI: 10.1088/0953-8984/23/47/475502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Density functional theory, the free-electron empty lattice approximation and the nearly free-electron approximation are employed to investigate the electronic properties of partially covalent α-Ga. Whereas free-electron-like properties are revealed over a large energy range, a deep pseudogap at the Fermi level is characteristic of α-Ga. We explain the origin of the pseudogap in terms of a delicate interplay between the electronic states and the specific Brillouin zone geometry.
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Affiliation(s)
- Z Y Zhu
- Physical Sciences and Engineering Division, KAUST, Thuwal 23955-6900, Kingdom of Saudi Arabia
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17
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Jezequel G, Lemonnier JC, Thomas J. Optical properties of gallium films between 2 and 15 eV. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0305-4608/7/8/028] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Bosio L, Cortes R, Copley JRD, Teuchert WD, Lefebvre J. Phonons in metastable beta gallium: neutron scattering measurements. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0305-4608/11/11/009] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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19
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Electroreflectance spectra of polycrystalline gallium in alkali solutions. RUSS J ELECTROCHEM+ 2000. [DOI: 10.1007/bf02757050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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20
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Bernasconi M, Chiarotti GL, Tosatti E. Ab initio calculations of structural and electronic properties of gallium solid-state phases. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:9988-9998. [PMID: 9980044 DOI: 10.1103/physrevb.52.9988] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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21
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Barman SR, Sarma DD. Electronic structures of gallium and indium across the solid-liquid transition. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:4007-4013. [PMID: 9979236 DOI: 10.1103/physrevb.51.4007] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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22
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Bermejo FJ, Férnandez-Barquín L, Gómez-Sal JC. Low-frequency ac electrical resistivity of liquid gallium and its relationship with the dynamic structure factor. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1994; 50:1341-1348. [PMID: 9962099 DOI: 10.1103/physreve.50.1341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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23
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Züger O, Dürig U. Atomic structure of the alpha -Ga(001) surface investigated by scanning tunneling microscopy: Direct evidence for the existence of Ga2 molecules in solid gallium. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:7319-7321. [PMID: 10002463 DOI: 10.1103/physrevb.46.7319] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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24
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Gong XG, Chiarotti GL, Parrinello M, Tosatti E. alpha -gallium: A metallic molecular crystal. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:14277-14280. [PMID: 9997309 DOI: 10.1103/physrevb.43.14277] [Citation(s) in RCA: 64] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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25
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Scrocco M. Electron-energy-loss spectra of GaSe and Ga metal. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 36:9732-9735. [PMID: 9942871 DOI: 10.1103/physrevb.36.9732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Aspnes DE, Harbison JP, Studna AA, Florez LT. Optical reflectance and electron diffraction studies of molecular-beam-epitaxy growth transients on GaAs(001). PHYSICAL REVIEW LETTERS 1987; 59:1687-1690. [PMID: 10035303 DOI: 10.1103/physrevlett.59.1687] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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27
|
|
28
|
Zwilling M, Schmidt PC, Weiss A. Experimental and theoretical studies of optical properties on alloys of the intermetallic systems Li2Ag2−x In x and Li2Cd2−x In x. ACTA ACUST UNITED AC 1978. [DOI: 10.1007/bf00885121] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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