Morphology and Optical Properties of a Composite Material Based on Gold Nanoparticles and Nonstoichiometric Silicon Oxide

2020 ◽  
Vol 46 (8) ◽  
pp. 827-830
Author(s):  
A. O. Zamchiy ◽  
S. V. Starinskiy ◽  
E. A. Baranov
Keyword(s):  
Gold Nanoparticles ◽  
Composite Material ◽  
Optical Properties ◽  
Silicon Oxide

scholarly journals Морфология и оптические свойства композитного материала на основе наночастиц золота и нестехиометрического оксида кремния

2020 ◽  
Vol 46 (16) ◽  
pp. 47
Author(s):  
А.О. Замчий ◽  
С.В. Старинский ◽  
Е.А. Баранов
Keyword(s):  
Gold Nanoparticles ◽  
Composite Material ◽  
Optical Properties ◽  
Silicon Oxide ◽  
Mie Theory ◽  
Ultraviolet Region ◽  
Spherical Nanoparticles ◽  
Structural And Optical Properties ◽  
Plasmon Peak ◽  
First Time

In this work, the morphology, structural and optical properties of a composite material based on gold nanoparticles and a thin film of amorphous non-stoichiometric silicon oxide (a-SiOx, x = 1.8) were studied for the first time. Based on the results obtained, it was experimentally shown that the a-SiO1.8 layer conformally covered the spherical nanoparticles. An analytical model based on the Mie theory well described the optical properties of the gold nanoparticles and the composite material in the ultraviolet region of the spectrum obtained from the experiment, as well as the change in the amplitude of the plasmon peak that occurs during the formation of the composite material.

Assembly and Optical Properties of Metal Nanoparticles

2019 ◽  
Vol 294 ◽  
pp. 3-10
Author(s):  
E.A. Dawi ◽  
A. Abdelkader
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Self Assembly ◽  
Silicon Oxide ◽  
Ex Situ ◽  
Visible Range ◽  
Plasmonic Nanostructures ◽  
Electromagnetic Spectrum ◽  
Force Microscopy ◽  
Atomic Force

In this paper, the deposition and optical properties of charge-stabilized gold nanoparticles on silicon oxide substrates is studied, which have been derivatised with (aminopropyl) triemethoxysilane. Monodispersed charged-stabilized colloidal gold nanoparticles with diameters between 20-150 nm were prepared and their self-assembly and optical properties on silica substrates is studied. Atomic force microscopy (AFM) is employed to investigate the nanoparticle monolayers ex situ. Analysis of AFM images provide evidence that the formation of the colloidal nanoparticle monolayers is governed by random sequential adsorption. The results indicate that the ionic strength of the suspension influences the spatial distribution of the nanoparticles. For all sizes of the Au nanoparticles tested, optical simulations of extinction coefficients made by finite-difference time domain (FDTD) indicate a resonance peak in the range of 510-600 nm wavelength of the visible range of the electromagnetic spectrum. The results indicate a simple and inexpensive approach of assembly of plasmonic nanostructures that can find applications in metamaterials and light waveguides.

scholarly journals Hybrid composite material based on polythiophene derivative nanofibers modified with gold nanoparticles for optoelectronics applications

2016 ◽  
Vol 52 (4) ◽  
pp. 1919-1929 ◽  
Author(s):  
Rafaela C. Sanfelice ◽  
Luiza A. Mercante ◽  
Adriana Pavinatto ◽  
Nathália B. Tomazio ◽  
Cleber R. Mendonça ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Composite Material ◽  
Hybrid Composite ◽  
Hybrid Composite Material ◽  
Polythiophene Derivative

High Density Gold Nanoparticles Within Three-Dimensionally Mesoporous SBA-15: Adsorption Behavior and Optical Properties

2015 ◽  
Vol 15 (9) ◽  
pp. 7060-7067 ◽  
Author(s):  
Xiaojuan Wang ◽  
Xiaoqing Yan ◽  
Renhong Li ◽  
Liping Xiao ◽  
Guicen Ma ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
High Density ◽  
Adsorption Behavior

Changes in the optical properties of films of silicon nitride, silicon oxinitride, and silicon oxide upon ion irradiation

1977 ◽  
Vol 26 (1) ◽  
pp. 129-131
Author(s):  
N. N. Gerasimenko ◽  
T. I. Kovalevskaya ◽  
V. G. Pan'kin ◽  
K. K. Svitashev ◽  
G. M. Tseitlin
Keyword(s):  
Optical Properties ◽  
Silicon Nitride ◽  
Silicon Oxide ◽  
Ion Irradiation

THEORETICAL MODEL FOR THE CALCULATION OF OPTICAL PROPERTIES OF GOLD NANOPARTICLES

2010 ◽  
Vol 19 (03) ◽  
pp. 427-436
Author(s):  
A. MENDOZA-GARCÍA ◽  
A. ROMERO-DEPABLOS ◽  
M. A. ORTEGA ◽  
J. L. PAZ ◽  
L. ECHEVARRÍA
Keyword(s):  
Gold Nanoparticles ◽  
Refractive Index ◽  
Optical Properties ◽  
Theoretical Model ◽  
Absorption Coefficient ◽  
Molecular System ◽  
Two Dimensional ◽  
Box Models ◽  
Solvent Environment ◽  
Absorption And Dispersion

We have developed an analytical method to describe the optical properties of nanoparticles, whose results are in agreement with the observed experimental behavior according to the size of the nanoparticle under analysis. Our considerations to describe plasmonic absorption and dispersion are based on the combination of the two-level molecular system and the two-dimensional quantum box models. Employing the optical stochastic Bloch equations, we have determined the system's coherence, from which we have calculated expressions for the absorption coefficient and refractive index. The innovation of this methodology is that it allows us to take into account the solvent environment, which induce quantum effects not considered by classical treatments.

Optical properties of nanostructured carbon and gold nanoparticle hybrids

2014 ◽  
Vol 1700 ◽  
pp. 79-82 ◽  
Author(s):  
Yuan Li ◽  
Nitin Chopra
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Hot Spots ◽  
Simulation Method ◽  
Dipole Approximation ◽  
Multilayer Graphene ◽  
Nanostructured Carbon ◽  
Near Surface ◽  
Scattering Effects ◽  
Dda Method

ABSTRACTWe report simulation of optical properties of hybrid geometry comprised of multilayer graphene shell encapsulated gold nanoparticles loaded with carbon nanotubes. The discrete dipole approximation (DDA) method was employed. The results indicated that the optical properties of encapsulated gold nanoparticles were not suppressed by the carbon material coating. Furthermore, low scattering effects were also observed. The simulation method helped visualize the near-surface normalized electric field, which is directly related to the intensity of hot spots on the surface of these hybrid nanoarchitectures.

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