Anomalous Frequency and Temperature Dependence of the Optical Absorption of Small Gold Particles

Крейбиг, У.

doi:10.1051/jphyscol:1977220

Cited by 66 publications

(70 citation statements)

References 24 publications

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“…Kreibig has evaluated the temperature dependence of small silver and gold clusters (diameters of 1 to 10 nm) in a glass matrix and found that the spectrum decreases in intensity and broadens when increasing the temperature from 1.5 to 300 K. 25,35,36 Kreibig explained his results on the size dependence of the temperature dependence of the Mie resonance of gold nanoparticles in terms of two effects. The temperature dependence of the electron-phonon scattering is partially compensated by a thermal lattice contraction of the nanoparticles with decreasing temperature.…”

Section: Discussionmentioning

confidence: 99%

Size and Temperature Dependence of the Plasmon Absorption of Colloidal Gold Nanoparticles

1999

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The size and temperature dependence of the plasmon absorption is studied for 9, 15, 22, 48, and 99 nm gold nanoparticles in aqueous solution. The plasmon bandwidth is found to follow the predicted behavior as it increases with decreasing size in the intrinsic size region (mean diameter smaller than 25 nm), and also increases with increasing size in the extrinsic size region (mean diameter larger than 25 nm). Because of this pronounced size effect a homogeneous size distribution and therefore a homogeneous broadening of the plasmon band is concluded for all the prepared gold nanoparticle samples. By applying a simple two-level model the dephasing time of the coherent plasmon oscillation is calculated and found to be less than 5 fs. Furthermore, the temperature dependence of the plasmon absorption is examined. A small temperature effect is observed. This is consistent with the fact that the dominant electronic dephasing mechanism involves electron-electron interactions rather than electron-phonon coupling.

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Section: Discussionmentioning

confidence: 99%

Size and Temperature Dependence of the Plasmon Absorption of Colloidal Gold Nanoparticles

1999

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“…The peak plasmon wavelength shifts continuously to longer wavelengths with increasing average particle radius. A similar dependence was seen in silica glasses dispersed with Au colloid particles (112,113). Foss et al (68) found significant transparency in the near-IR region and strong extinction in the visible for particles with nearsphere like shape.…”

Section: Effects Of Nanoparticle Sizementioning

confidence: 55%

“…The relationship between optical properties and nanoparticle radius has been studied in glasses with dispersed colloid Au nanoparticles (111,112). The peak plasmon wavelength shifts continuously to longer wavelengths with increasing average particle radius.…”

Section: Effects Of Nanoparticle Sizementioning

confidence: 99%

The third order nonlinear optical properties of gold nanoparticles in glasses, part II

2003

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The optical properties of gold nanoparticles have been known for a number of years and recent advances in laser power have now allowed the non-linear optical properties to be studied. In this short review paper, the various theories that have been used to describe the optical properties of gold nanoparticles are presented. Methods of preparing gold nanoparticles in glasses are explained briefly, as well as characterization techniques. The optical properties of gold nanoparticles are reviewed, as well as the effects of particle size, shape, concentration and c. Effects Of Nanoparticle SizeThe relationship between optical properties and nanoparticle radius has been studied in glasses with dispersed colloid Au nanoparticles (111,112). The peak plasmon wavelength shifts continuously to longer wavelengths with increasing average particle radius. A similar dependence was seen in silica glasses dispersed with Au colloid particles (112,113). Foss et al. (68) found significant transparency in the near-IR region and strong extinction in the visible for particles with nearsphere like shape. The wavelength of maximum extinction increased with increasing particle radius, giving rise to colour variations (red-purple for 30 nm size and blue-green for 60 nm size). This is shown in Figure 1. This was consistent with the findings of Mie (17). Hosoya et al. (73) and Muto et al. (102) found in Au:Al2O3 thin films that the spectra broadened and the peak shifted to longer wavelengths as the particle size decreased. Muto et al. (102) explained it as due to charge transfer from the metal particles to the amorphous oxide by the aluminium-metal bonds used in adhesion. The decreased electron density of the metal particles gives rise to the blue-shift. This behaviour was opposite to that of Au:SiO2, and indicates that the matrix has an effect on the blue-or red-shift of the plasmon peak with size.As the wavelength of the surface plasmon resonance changes with particle size, the χ (3) is also expected to change with size. Fukumi et al. (60), found χ (3) to be approximately proportional to the fourth power of the particle radius. They also found that χm (3) (of the metal particles on their own) had negligible dependence on the particle radius. The value of χm (3) = 2.5 x 10 -8 esu agreed with that of Hache et al. (32) and Bloemer et al. (114). Hornyak et al. (69) prepared Au nanoparticles in nanoporous alumina membranes, and absorption properties for nanoparticles of size 52 nm down to 16 nm, and with various aspect ratios. They used a modified form of MG theory, called the dynamic MG (DMG) theory (68), to model the optical properties. They found that as the nanoparticle size decreased, the wavelength of the maximum absorption intensity max approached the value predicted by DMG theory. For the smallest diameter particles, (16 nm), the values were identical with DMG theory, and they suggested that there was a quasi-static DMG limit ( max does not change from ~5 08 nm) for nanoparticles of diameter 16 nm. Alvarez et al. (115) pr...

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“…[7] and [8], the iterative inversion method developed in (19,20) is applied. This technique based upon the assumption of log-normal statistics both for measured data and desired size distribution and includes a rather effective and original procedure of matrix inversion (see Appendix B).…”

Section: Ultrafine Metallic Particle Sizing From the Spectral Extinctmentioning

confidence: 99%

“…In the context of the above approach, the use of electron's mean free path limitation model (EMFPL) was found to be effective in the interpretation of size dependence of extinction spectra broadening of matrix isolated ultrafine particles of silver and gold (7,8). In the following, the EMFPL model will be applied to describe size dependencies of complex refractive index of ultrafine silver particles.…”

Section: Introductionmentioning

confidence: 99%

Optical Sizing of Ultrafine Metallic Particles: Retrieval of Particle Size Distribution from Spectral Extinction Measurements

Oshchepkov

Sinyuk

1998

Journal of Colloid and Interface Science

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Anomalous Frequency and Temperature Dependence of the Optical Absorption of Small Gold Particles

Cited by 66 publications

References 24 publications

Size and Temperature Dependence of the Plasmon Absorption of Colloidal Gold Nanoparticles

Size and Temperature Dependence of the Plasmon Absorption of Colloidal Gold Nanoparticles

The third order nonlinear optical properties of gold nanoparticles in glasses, part II

Optical Sizing of Ultrafine Metallic Particles: Retrieval of Particle Size Distribution from Spectral Extinction Measurements

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