Preparation and enhanced off-resonance optical nonlinearities of CdS-capped gold nanoparticles embedded in BaTiO3 thin films

2002 ◽  
Vol 17 (11) ◽  
pp. 2802-2808 ◽  
Author(s):  
Yong Yang ◽  
Jianlin Shi ◽  
Hangrong Chen ◽  
Shugang Dai ◽  
Weiming Huang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Nonlinear Response ◽  
Cds Nanoparticles ◽  
Core Shell ◽  
Third Order ◽  
Shell Nanoparticles ◽  
Nonlinear Optical Susceptibility ◽  
Self Assembling ◽  
Optical Susceptibility ◽  
Core Shell Nanoparticles

A simple approach has been developed for the synthesis of Au@CdS core-shell nanoparticles by a direct self-assembling process. Stable Au@CdS composite colloids were prepared by thiourea, as a double-functional reagent that acted as the linkage agent between Cd2+ ions and gold nanoparticles. The CdS-capped gold composite nanoparticles were successfully integrated into BaTiO3 films. A significant enhancement of third-order nonlinear optical susceptibility in the Au@CdS nanoparticles with core-shell structure is reported. To compare the effect of enhanced nonlinear response, single gold or CdS nanoparticles embedded in BaTiO3 films were also prepared.

Aromatic thiol-modulated Ag overgrowth on gold nanoparticles: tracking the thiol's position in the core–shell nanoparticles

Nanoscale ◽  
2019 ◽  
Vol 11 (37) ◽  
pp. 17471-17477 ◽  
Author(s):  
Jiaqi Chen ◽  
Dejing Meng ◽  
Hui Wang ◽  
Haiyun Li ◽  
Yinglu Ji ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Growth Process ◽  
Shell Growth ◽  
Core Shell ◽  
Internal Reference ◽  
Shell Nanoparticles ◽  
Aromatic Thiol ◽  
The Core ◽  
Spatial Trajectory ◽  
Core Shell Nanoparticles

Using DMAB as the Raman internal reference, the spatial trajectory of modulating 4-ATP molecules was tracked during the shell growth process.

Binding energy and the third-order nonlinear optical susceptibility of an exciton in GaAs/AlGaAs core/shell spherical quantum dot

2018 ◽  
Vol 47 (4) ◽  
pp. 445-455 ◽  
Author(s):  
Zhi-Hai Zhang ◽  
Jun Sheng Li ◽  
Jian Tang ◽  
Liang Liang Yang ◽  
Kang-Xian Guo ◽  
...  
Keyword(s):  
Binding Energy ◽  
Quantum Dot ◽  
Nonlinear Optical ◽  
Core Shell ◽  
Third Order ◽  
Nonlinear Optical Susceptibility ◽  
The Third ◽  
Spherical Quantum Dot ◽  
Optical Susceptibility

Radiosynthesis of Gold/Albumin Core/shell Nanoparticles for Biomedical Applications

MRS Advances ◽  
2017 ◽  
Vol 2 (49) ◽  
pp. 2675-2681 ◽  
Author(s):  
Constanza Y. Flores ◽  
Estefania Achilli ◽  
Mariano Grasselli
Keyword(s):  
Gold Nanoparticles ◽  
Biomedical Applications ◽  
Irradiation Dose ◽  
Ftir Spectrum ◽  
Core Shell ◽  
Peak Shape ◽  
Shell Nanoparticles ◽  
Plasmon Peak ◽  
Radiation Induced ◽  
Core Shell Nanoparticles

ABSTRACTGold/albumin core/shell nanoparticles (Au/AlbNPs) was prepared by a novel aggregation/crosslinking technique and characterized by several spectroscopic and microscopy methods. Albumin, in presence of gold nanoparticles (AuNPs), is aggregated by the addition of ethanol and further stabilized by radiation-induced crosslinking using a 60Co source. Nanoconstructs are characterized to determine size, morphology and optical characteristics. The Au/AlbNPs were prepared in different ethanol and albumins concentrations. Results showed that it is possible to obtain Au/AlbNPs using ethanol 30 %v/v, albumin in different concentrations and an irradiation dose of 10 kGy. Au/AlbNP plasmon peak shifted to 530 nm, keeping the typical plasmon peak shape. The size of Au/AlbNPs is approximately double respect to the naked AuNPs and they show core/shell type morphology. The main amide peaks of albumin in FTIR spectrum can be found in the spectrum of nanoconstructs.

Doping core–shell nanoparticles into a solution-processed electron transporting layer for polymer light-emitting diodes

RSC Advances ◽  
2016 ◽  
Vol 6 (44) ◽  
pp. 38148-38152 ◽  
Author(s):  
Jinghong Peng ◽  
Fu Tang ◽  
Xinjun Xu ◽  
Manping Jia ◽  
Lidong Li
Keyword(s):  
Gold Nanoparticles ◽  
Light Emitting Diodes ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Solution Processed ◽  
Light Emitting ◽  
Electron Transporting Layer ◽  
Polymer Light Emitting Diodes ◽  
Core Shell Nanoparticles

Core–shell gold nanoparticles have been doped into the solution-processed electron-transporting layer of PLED to obtain enhanced EL performance.

Synthesis, characterization, and femtosecond third-order optical nonlinearity of Au@Ag core–shell nanoparticles

2021 ◽  
Author(s):  
Heng Lu ◽  
Bing Gu
Keyword(s):  
Absorption Spectrum ◽  
Photoelectron Spectroscopy ◽  
Nonlinear Refraction ◽  
Optical Nonlinearity ◽  
Core Shell ◽  
Third Order ◽  
Shell Nanoparticles ◽  
Linear Absorption ◽  
X Ray ◽  
Core Shell Nanoparticles

In this work, the Au@Ag bimetallic core–shell nanostructures were synthesized by a seed-mediated growth. The crystal structure, morphology, elemental composition, atomic concentration, and absorption spectrum of the as-synthesized nanoparticles were characterized by means of X-ray diffraction, transmission electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, and ultraviolet–visible linear absorption spectrum, respectively. The femtosecond third-order optical nonlinearities of nanoparticle dispersions were investigated by carrying out the femtosecond-pulsed [Formula: see text]-scan measurements at 800[Formula: see text]nm. The experimental results indicate that Au@Ag core–shell nanoparticles exhibit the positive refractive nonlinearity and negative absorptive nonlinearity. The third-order nonlinear refraction indexes of Au and Au@Ag nanoparticles are measured to be [Formula: see text] and [Formula: see text][Formula: see text]cm2/GW, respectively. The results show that the bimetallic nanoparticle has potential possibility in nonlinear photonic applications.

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