Gold Nanoparticles Reshaped by Ultrafast Laser Irradiation Inside a Silica-Based Glass, Studied Through Optical Properties

2012 ◽  
Vol 116 (4) ◽  
pp. 2647-2655 ◽  
Author(s):  
Chaxing Fan ◽  
Bertrand Poumellec ◽  
Huidan Zeng ◽  
Rudy Desmarchelier ◽  
Bernard Bourguignon ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Laser Irradiation ◽  
Ultrafast Laser

scholarly journals The fragmentation mechanism of gold nanoparticles in water under femtosecond laser irradiation

2021 ◽  
Author(s):  
Gabriele Bongiovanni ◽  
Pavel K. Olshin ◽  
Chengcheng Yan ◽  
Jonathan M. Voss ◽  
Marcel Drabbels ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Laser Pulses ◽  
Ultrafast Laser ◽  
Plasmonic Nanoparticles ◽  
Femtosecond Laser Irradiation ◽  
Fragmentation Mechanism ◽  
Ultrafast Laser Pulses

Plasmonic nanoparticles in aqueous solution have long been known to fragment under irradiation with intense ultrafast laser pulses, creating progeny particles with diameters of a few nanometers. However, the mechanism...

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

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.

scholarly journals Optical Properties of Star-Shaped Gold Nanoparticles

Nano Letters ◽  
2006 ◽  
Vol 6 (4) ◽  
pp. 683-688 ◽  
Author(s):  
Colleen L. Nehl ◽  
Hongwei Liao ◽  
Jason H. Hafner
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties
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