Mie theory and the dichroic effect for spherical gold nanoparticles: an experimental approach

Wrigglesworth, E G; Johnston, James H.

doi:10.1039/d1na00148e

Cited by 32 publications

(13 citation statements)

References 54 publications

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“…Some authors have extracted the ratio σ sca / σ abs from diffusion measurements and stressed the good agreement between experiments and calculations. 36 Actually, our eqn (3) confirms that the spectra should be proportional to σ sca / σ abs . Eqn (2) and (3) have been implemented on the online calculator which allows a rapid estimation of the spectra of the most common plasmonic metals.…”

Section: Discussionsupporting

confidence: 63%

A complete explanation of the plasmonic colours of gold nanoparticles and of the bichromatic effect

Pluchery,

Prado,

Watkins

2023

J. Mater. Chem. C

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Section: Discussionsupporting

confidence: 63%

A complete explanation of the plasmonic colours of gold nanoparticles and of the bichromatic effect

Pluchery,

Prado,

Watkins

2023

J. Mater. Chem. C

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“…Table gathers the n (real part of the refractive index) and k (imaginary part) used for the simulation. For Au and Ag, values were already available in the advanced menu of MiePlot software (and originate from ref ): Even if other refractive index values can be found in the literature, these are the most used for these types of simulations . For 316L, the indexes were taken from ref .…”

Section: Methodsmentioning

confidence: 99%

Strong Enhancement of Nucleation Efficiency of Aqueous Ethylenediamine Sulfate Solutions by Nonphotochemical Laser-Induced Nucleation: Investigations on the Role of Solid Impurities in the Mechanism

Briard,

Brandel,

Dupray

2023

Crystal Growth & Design

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The nonphotochemical laser-induced nucleation (NPLIN) phenomenon of an inorganic compound, ethylenediamine sulfate, exhibiting crystal chirality has been investigated. Strong enhancement of the nucleation efficiency upon laser irradiation is reported and is shown to rely on the presence of insoluble particles dispersed within the aqueous solutions since filtration drastically reduces the NPLIN effect. Elemental analyses (ICP-OES) show that these particles have a composition close to that of stainless steel. Then, we report a systematic study of the impact of doping the filtered solutions with several types of metallic particles on NPLIN efficiency as a function of irradiation wavelength and show that suitable doping permits to retrieve high nucleation probabilities. The impact of the geometry of light polarization on the distribution of crystal enantiomorphs is also investigated to assess the possibility of stereoselectively triggering the NPLIN effect in the case of ethylenediamine sulfate solutions irradiated with a single nanosecond laser pulse.

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“…Owing to their strong interactions with visible light through localized surface plasmon resonances, Au nanoparticles have been subject to extensive research and application. According to the preceding analysis, the commonly used empirical phase function models (e.g., HG, CS, and RM) may cause obvious errors in the calculations of reflectance spectra and affect the accurate analysis of applications of plasmonic coloring and image projection [49,50]. Meanwhile, because the relative errors of absorption characteristics caused by using the empirical phase function models are relatively small, this aspect can be ignored in many engineering applications, such as photothermal utilization and energy harvesting [51,52].…”

Section: Case 2: Non-absorbing Tio 2 Particles Embedded In Watermentioning

confidence: 99%

Quantitative Evaluation of the Phase Function Effects on Light Scattering and Radiative Transfer in Dispersed Systems

Jia

et al. 2022

Photonics

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The light scattering properties of particles play important roles in radiative transfer in many dispersed systems, such as turbid atmosphere, ocean water, nanofluids, composite coatings and so on. As one of the scattering property parameters, the scattering phase functions of particles are strongly dependent on the particle size, size distribution, and morphology, as well as on the complex refractive indices of the particles and surrounding media. For the sake of simplicity, the empirical phase function models are widely used in many practical applications. In this work, we focus on the radiative transfer problem in dispersed systems composed of spherical particles, and give quantitative analyses of the impact of scattering phase functions on the radiative transfer process. We fit the scattering phase functions of four different types of practical dispersed systems using four previously proposed empirical phase function models, including the Henyey–Greenstein (HG) model, Cornette Shanks (CS) model, Reynold and McCormick (RM) model and two-term Reynolds–McCormick (TTRM) model. By comparing the radiative transfer characteristics (i.e., hemispherical reflectance, hemispherical transmittance and total absorptance) of dispersed layers calculated using the Monte Carlo method, the relative errors caused by using the empirical phase functions are systematically investigated. The results demonstrate that the HG, CS and RM models cause obvious errors in the calculation of hemispherical reflectance in many cases. Meanwhile, the induced errors show no obvious regularity, but are related to the particle size and layer optical thickness. Due to the good fitting effect in both forward and backward directions, the TTRM model provides significantly higher performances in fitting the phase functions of all considered cases than the widely used single-term parametrizations. Moreover, for different particle sizes and layer optical thicknesses, the induced errors of the TTRM model in radiative transfer characteristics are very small, especially for the case of polydisperse particles. Our results can be used to guide the design, analysis and optimization of dispersed systems in practical optics and photonics applications.

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Mie theory and the dichroic effect for spherical gold nanoparticles: an experimental approach

Abstract: The attractive optical properties of metallic nanoparticles include the optically interesting but surprisingly not well understood dichroic effect, defined in this research as when particle colloids display different colours in...

Cited by 32 publications

References 54 publications

A complete explanation of the plasmonic colours of gold nanoparticles and of the bichromatic effect

A complete explanation of the plasmonic colours of gold nanoparticles and of the bichromatic effect

Strong Enhancement of Nucleation Efficiency of Aqueous Ethylenediamine Sulfate Solutions by Nonphotochemical Laser-Induced Nucleation: Investigations on the Role of Solid Impurities in the Mechanism

Quantitative Evaluation of the Phase Function Effects on Light Scattering and Radiative Transfer in Dispersed Systems

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