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Čempel D, Nguyen MT, Ishida Y, Tokunaga T, Yonezawa T. Ligand free green plasma-in-liquid synthesis of Au/Ag alloy nanoparticles. NEW J CHEM 2018. [DOI: 10.1039/c7nj05154a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Au/Ag alloy nanoparticles were successfully prepared by a microwave-induced plasma in liquid process without any organic protecting or reducing agents.
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Affiliation(s)
- David Čempel
- Division of Materials Science and Engineering
- Faculty of Engineering
- Hokkaido University
- Hokkaido 060-8628
- Japan
| | - Mai Thanh Nguyen
- Division of Materials Science and Engineering
- Faculty of Engineering
- Hokkaido University
- Hokkaido 060-8628
- Japan
| | - Yohei Ishida
- Division of Materials Science and Engineering
- Faculty of Engineering
- Hokkaido University
- Hokkaido 060-8628
- Japan
| | - Tomoharu Tokunaga
- Department of Materials Science and Engineering
- Faculty of Engineering
- Nagoya University
- Furo-cho
- Chikusa
| | - Tetsu Yonezawa
- Division of Materials Science and Engineering
- Faculty of Engineering
- Hokkaido University
- Hokkaido 060-8628
- Japan
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2
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Shahcheraghi N, Keast VJ, Gentle AR, Arnold MD, Cortie MB. Anomalously strong plasmon resonances in aluminium bronze by modification of the electronic density-of-states. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:405501. [PMID: 27518759 DOI: 10.1088/0953-8984/28/40/405501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We use a combination of experimental measurements and density functional theory calculations to show that modification of the band structure of Cu by additions of Al causes an unexpected enhancement of the dielectric properties. The effect is optimized in alloys with Al contents between 10 and 15 at.% and would result in strong localized surface plasmon resonances at suitable wavelengths of light. This result is surprising as, in general, alloying of Cu increases its DC resistivity and would be expected to increase optical loss. The wavelengths for the plasmon resonances in the optimized alloy are significantly blue-shifted relative to those of pure Cu and provide a new material selection option for the range 2.2-2.8 eV.
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Affiliation(s)
- N Shahcheraghi
- Institute for Nanoscale Technology, University of Technology Sydney, Broadway, NSW 2007, Australia
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3
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Fletcher G, Arnold MD, Pedersen T, Keast VJ, Cortie MB. Multipolar and dark-mode plasmon resonances on drilled silver nano-triangles. OPTICS EXPRESS 2015; 23:18002-13. [PMID: 26191860 DOI: 10.1364/oe.23.018002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Dark-mode plasmon resonances can be excited by positioning a suitable nano-antenna above a nanostructure to couple a planar incident wave-front into a virtual point source. We explore this phenomenon using a prototypical nanostructure consisting of a silver nanotriangle into which a hole has been drilled and a rod-like nano-antenna of variable aspect ratio. Using numerical simulations, we establish the behavior of the basic drilled nanotriangle under plane wave illumination and electron beam irradiation to provide a baseline, and then add the nano-antenna to investigate the stimulation of additional dark-mode plasmon resonances. The introduction of a suitably tuned nano-antenna provides a new and general means of exciting dark-mode resonances using plane wave light. The resulting system exhibits a very rich variety of radiant and sub-radiant resonance modes.
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Yan T, Zhong X, Rider AE, Lu Y, Furman SA, Ostrikov K(K. Microplasma-chemical synthesis and tunable real-time plasmonic responses of alloyed AuxAg1−x nanoparticles. Chem Commun (Camb) 2014; 50:3144-7. [DOI: 10.1039/c3cc48846b] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A new conceptual microplasma-based approach is developed to produce AuAg alloyed crystalline nanoparticles at atmospheric pressure and low temperatures, in the absence of a chemical reducing agent. Real-time plasmonic monitoring is demonstrated.
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Affiliation(s)
- Tingting Yan
- Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy
- Shanghai Jiao Tong University
- Shanghai 200240, China
| | - Xiaoxia Zhong
- Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy
- Shanghai Jiao Tong University
- Shanghai 200240, China
| | - Amanda Evelyn Rider
- CSIRO Materials Science & Engineering
- Lindfield, Australia
- Faculty of Science
- The University of Sydney
- , Australia
| | - Yi Lu
- Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy
- Shanghai Jiao Tong University
- Shanghai 200240, China
| | | | - Kostya (Ken) Ostrikov
- CSIRO Materials Science & Engineering
- Lindfield, Australia
- Faculty of Science
- The University of Sydney
- , Australia
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5
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Wu T, Yang S, Li X. Tunable plasmon resonances and two-dimensional anisotropy of angular optical response of overlapped nanoshells. OPTICS EXPRESS 2013; 21:7811-7820. [PMID: 23546162 DOI: 10.1364/oe.21.007811] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Symmetry breaking of metallic nanoparticles results in many unique optical properties. We use the discrete dipole approximation method to study the optical properties of overlapped nanoshells which further break the rotational symmetry compared with the semishells. The optical properties of the nanoparticles can be tuned from the visible to near infrared regime by varying the geometry parameters and the hybrid components of nanoparticles. The calculated extinction spectra show the two-dimensional anisotropy of the angular optical response of the nanoparticles. The plasmon hybridization model provides a way to interpret the resonance modes of the nanoparticles. The tunable plasmon resonances, the enhanced local fields and the anisotropic optical properties suggest that the overlapped nanoshells have potential applications in surface-enhanced spectroscopy and "smart" coating in windows or display devices.
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Affiliation(s)
- Tengfei Wu
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China
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Qian J, Chen Z, Chen J, Li Y, Xu J, Sun Q. Two-dimensional angularly selective optical properties of gold nanoshell with holes. OPTICS EXPRESS 2012; 20:14614-14620. [PMID: 22714523 DOI: 10.1364/oe.20.014614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We studied the optical extinction properties of Au nanoshell with two holes by the discrete-dipole approximation method. We found that the extinction spectra of the nanoparticles are sensitive to the angle between the polarization vector of the incident light and either symmetrical axis of the hole on nanoshell and also the sizes of two holes. The nanostructure we proposed provides the additional dimensional angularly selectivity of the optical properties and the plasmon resonances redshift comparing with the nanocup. In addition, the conception of the "two-dimensional" symmetry breaking of the nanoparticle is suggested which can induce the two-dimensional spatial asymmetry of optical properties of nanoparticles.
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Affiliation(s)
- Jun Qian
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics, Nankai University, Tianjin 300071, China
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7
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Rowan CK, Paci I. Nanoparticle morphology and aspect ratio effects in Ag/PVDF nanocomposites. Theor Chem Acc 2012. [DOI: 10.1007/s00214-011-1078-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Cortie MB, McDonagh AM. Synthesis and Optical Properties of Hybrid and Alloy Plasmonic Nanoparticles. Chem Rev 2011; 111:3713-35. [PMID: 21235212 DOI: 10.1021/cr1002529] [Citation(s) in RCA: 408] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Michael B. Cortie
- Institute for Nanoscale Technology, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia
| | - Andrew M. McDonagh
- Institute for Nanoscale Technology, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia
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9
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Seeboth A, Ruhmann R, Mühling O. Thermotropic and Thermochromic Polymer Based Materials for Adaptive Solar Control. MATERIALS 2010; 3:5143-5168. [PMID: 28883374 PMCID: PMC5445809 DOI: 10.3390/ma3125143] [Citation(s) in RCA: 132] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Accepted: 12/02/2010] [Indexed: 11/16/2022]
Abstract
The aim of this review is to present the actual status of development in adaptive solar control by use of thermotropic and organic thermochromic materials. Such materials are suitable for application in smart windows. In detail polymer blends, hydrogels, resins, and thermoplastic films with a reversible temperature-dependent switching behavior are described. A comparative evaluation of the concepts for these energy efficient materials is given as well. Furthermore, the change of strategy from ordinary shadow systems to intrinsic solar energy reflection materials based on phase transition components and a first remark about their realization is reported. Own current results concerning extruded films and high thermally stable casting resins with thermotropic properties make a significant contribution to this field.
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Affiliation(s)
- Arno Seeboth
- Department Chromogenic Polymers, Fraunhofer Institute for Applied Polymer Research, Volmerstrasse 7B, D-12489 Berlin, Germany.
| | - Ralf Ruhmann
- Department Chromogenic Polymers, Fraunhofer Institute for Applied Polymer Research, Volmerstrasse 7B, D-12489 Berlin, Germany.
| | - Olaf Mühling
- Department Chromogenic Polymers, Fraunhofer Institute for Applied Polymer Research, Volmerstrasse 7B, D-12489 Berlin, Germany.
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Cortie MB, Giddings J, Dowd A. Optical properties and plasmon resonances of titanium nitride nanostructures. NANOTECHNOLOGY 2010; 21:115201. [PMID: 20173237 DOI: 10.1088/0957-4484/21/11/115201] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We examine the optical properties of nanostructures comprised of titanium nitride, TiN, an electrically conducting intermetallic-like compound. This material can be deposited in the form of durable films by physical vapor deposition. Use of nanosphere templating techniques extends the range of nanostructures that can be produced to include the versatile semi-shell motif. The dielectric properties of TiN(1-x) depend upon stoichiometry and are favorable for plasmon resonance phenomena in the mid-visible to near-infrared range of the spectrum and for x approximately 0. We analyze the optical phenomena operating in such structures using a combination of experiment and simulation and show that semi-shells of TiN exhibit a tunable localized plasmon resonance with light. The material is, however, unsuitable for applications in which a long-distance surface plasmon polariton is desired.
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Affiliation(s)
- M B Cortie
- Institute for Nanoscale Technology, University of Technology Sydney, Broadway, NSW, Australia.
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12
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Haverkamp RG. A Decade of Nanoparticle Research in Australia and New Zealand. PARTICULATE SCIENCE AND TECHNOLOGY 2010. [DOI: 10.1080/02726350903405387] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Neretina S, Qian W, Dreaden EC, El-Sayed MA, Hughes RA, Preston JS, Mascher P. Exciton lifetime tuning by changing the plasmon field orientation with respect to the exciton transition moment direction: CdTe-Au core-shell nanorods. NANO LETTERS 2009; 9:1242-1248. [PMID: 19236030 DOI: 10.1021/nl900183m] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We studied the anisotropy of the influence of plasmonic fields, arising from the optical excitation of a gold nanoshell plasmon absorption at 770 nm, on the lifetime of the bandgap state of the CdTe core in vertically aligned CdTe-Au core-shell nanorods. The previously observed decrease in the lifetime was studied as a function of the tilt angle between the long axis of the nanorod and the electric field polarization direction of the plasmon inducing exciting light. It is observed that the strongest enhancement to the exciton relaxation rate occurs when the two axes are parallel to one another. These results are discussed in terms of the coupling between the exciton transition moment of the CdTe rod and the electric field polarization direction of the gold nanoshell plasmon at 770 nm, which was determined from theoretical modeling based on the discrete dipole approximation.
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Affiliation(s)
- Svetlana Neretina
- Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA
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Maaroof AI, Cortie MB, Harris N, Wieczorek L. Mie and Bragg plasmons in subwavelength silver semi-shells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2008; 4:2292-2299. [PMID: 19016499 DOI: 10.1002/smll.200800203] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
2D arrays of silver semi-shells of 100 and 200 nm diameter display complex reflection and transmission spectra in the visible and near-IR. Here these spectral features are deconstructed and it is demonstrated that they result from the coupling of incident light into a delocalized Bragg plasmon, and the latter's induction of localized Mie plasmons in the arrays. These phenomena permit the excitation of transverse dipolar plasmon resonances in the semi-shells despite an ostensibly unfavorable orientation with respect to normally incident light. The resulting spectral feature in the mid-visible is strong and tunable.
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Affiliation(s)
- Abbas I Maaroof
- Institute for Nanoscale Technology, University of Technology, Sydney PO Box 123, Broadway NSW 2007, Australia
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Jain PK, Eustis S, El-Sayed MA. Plasmon Coupling in Nanorod Assemblies: Optical Absorption, Discrete Dipole Approximation Simulation, and Exciton-Coupling Model. J Phys Chem B 2006; 110:18243-53. [PMID: 16970442 DOI: 10.1021/jp063879z] [Citation(s) in RCA: 697] [Impact Index Per Article: 38.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The shape anisotropy of nanorods gives rise to two distinct orientational modes by which nanorods can be assembled, i.e., end-to-end and side-by-side, analogous to the well-known H and J aggregation in organic chromophores. Optical absorption spectra of gold nanorods have earlier been observed to show a red-shift of the longitudinal plasmon band for the end-to-end linkage of nanorods, resulting from the plasmon coupling between neighboring nanoparticles, similar to the assembly of gold nanospheres. We observe, however, that side-by-side linkage of nanorods in solution shows a blue-shift of the longitudinal plasmon band and a red-shift of the transverse plasmon band. Optical spectra calculated using the discrete dipole approximation method were used to simulate plasmon coupling in assembled nanorod dimers. The longitudinal plasmon band is found to shift to lower energies for end-to-end assembly, but a shift to higher energies is found for the side-by-side orientation, in agreement with the optical absorption experiments. The strength of plasmon coupling was seen to increase with decreasing internanorod distance and an increase in the number of interacting nanorods. For both side-by-side and end-to-end assemblies, the strength of the longitudinal plasmon coupling increases with increasing nanorod aspect ratio as a result of the increasing dipole moment of the longitudinal plasmon. For both the side-by-side and end-to-end orientation, the simulation of a dimer of nanorods having dissimilar aspect ratios showed a longitudinal plasmon resonance with both a blue-shifted and a red-shifted component, as a result of symmetry breaking. A similar result is observed for a pair of similar aspect ratio nanorods assembled in a nonparallel orientation. The internanorod plasmon coupling scheme concluded from the experimental results and simulations is found to be qualitatively consistent with the molecular exciton coupling theory, which has been used to describe the optical spectra of H and J aggregates of organic molecules. The coupled nanorod plasmons are also suggested to be electromagnetic analogues of molecular orbitals. Investigation of the plasmon coupling in assembled nanorods is important for the characterization of optical excitations and plasmon propagation in these nanostructures. The surface plasmon resonance shift resulting from nanorod assembly also offers a promising alternative for analyte-sensing assays.
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Affiliation(s)
- Prashant K Jain
- Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332-0400, USA
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