Triangular metal nanoprisms of Ag, Au, and Cu: Modeling the influence of size, composition, and excitation wavelength on the optical properties

Hermoso, Willian; Alves, Tiago Vinicius; Oliveira, Caio César Spindola de; Moriya, Eduardo G.; Ornellas, Fernando R.; Camargo, Pedro H. C.

doi:10.1016/j.chemphys.2013.07.008

Cited by 55 publications

(56 citation statements)

References 52 publications

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“…The DDA represents a well-suited approach to model the far-field and near-field optical properties of nanostructured metal with a variety of shapes and sizes [12][13][14][15][16][17]. In this approximation method, the nanostructure (usually called Btarget^) is described as a cubic array lattice of electric dipoles (N-point dipoles) in which the polarizability and position vector of each dipole are specified as a i and r i , respectively, where i=1, 2,…, N. The polarization induced on each particle in the presence of an applied plane wave field can be calculated by [18].…”

Section: Simulation Methodsmentioning

confidence: 99%

Effects of Nanoparticle Shape and Size on Optical Properties of LaB6

et al. 2015

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The optical response of lanthanum hexaboride (LaB 6 ) nanoparticles has been investigated by both theoretically and experimentally. The LaB 6 nanoparticles obtained by solid-state reaction could avoid serious surface oxidization and exhibit excellent optical performance. The discrete dipole approximation (DDA) has been used to investigate the optical response of LaB 6 nanoparticles with different sizes and different shapes. The calculation results coincide with the experimental results and reveal that the largest extinction peak value appears at 60 nm for cubic particles and 40 nm for spherical particles, respectively. Our calculation results show that the existence of the largest extinction peak value is not only due to the surface oxides but also relate to the particle shape of LaB 6 compound. In addition, the LaB 6 nanoparticles with cubic and spherical shapes exhibit different optical responses, and the cubic particles exhibit stronger near infrared (NIR) extinction than spherical particles. With increasing particle size, the extinction peak value of spherical particle decreases more rapidly than that of cubic ones.

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Section: Simulation Methodsmentioning

confidence: 99%

Effects of Nanoparticle Shape and Size on Optical Properties of LaB6

et al. 2015

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“…A theoretical approach has been applied to anisotropic nanoparticles, based on the Discrete Dipole Approximation (DDA) method [22,[108][109][110][111].…”

Section: Plasmonicsmentioning

confidence: 99%

The SERS effect in coordination chemistry

Grasseschi

Toma

2017

Coordination Chemistry Reviews

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“…One of the key properties of the plasmonic nanostructures is that their resonance frequency is highly dependent on the chemical composition, geometry, and surrounding dielectric environment, which enables broad tunability of plasmon resonance for various applications at different spectral range [5][6][7][8]. Complex plasmonic nanostructures such as oligomers, three dimensional elements, which can introduce additional tunability capability of the optical properties via strong coupling, have attracted much interest in plasmonics these years [9][10][11][12][13]. For example, depending on the coupling efficiency between free-space light and electron oscillations in some complex nanostructures, the collective resonance modes of free charges in nanostructures can be classified as Bbright^mode and Bdark^mode [11,14,15].…”

Section: Introductionmentioning

confidence: 99%

Plasmon Modes and Substrate-Induced Fano Dip in Gold Nano-Octahedra

et al. 2015

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In this work, we have carried out a systematic study on the optical properties of gold nano-octahedra via numerical simulations. We obtained broadening scattering spectra dominated by a hybridized bonding mode originated from the interaction between intrinsic plasmon modes when increasing the size of gold nano-octahedra in vacuum. Once placing the nano-octahedra on a high refractive index dielectric substrate, a Fano dip can be induced in the scattering spectra due to the mutual interference between a dipolar mode and a quadrupolar mode. Moreover, we found that the interference become stronger by increasing the refractive index in substrate, and the broadening scattering spectra split into two hybridized modes in a single gold nano-octahedron: the anti-bonding mode and the bonding mode. Our results for the first time give a clear description of the complex plasmonic properties of a gold nano-octahedron and provide insights in designing appropriate nano-octahedral structures for applications.

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Triangular metal nanoprisms of Ag, Au, and Cu: Modeling the influence of size, composition, and excitation wavelength on the optical properties

Cited by 55 publications

References 52 publications

Effects of Nanoparticle Shape and Size on Optical Properties of LaB6

Effects of Nanoparticle Shape and Size on Optical Properties of LaB6

The SERS effect in coordination chemistry

Plasmon Modes and Substrate-Induced Fano Dip in Gold Nano-Octahedra

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