Fano resonance in a gold nanosphere with a J-aggregate coating

2015 ◽  
Vol 17 (38) ◽  
pp. 24931-24936 ◽  
Author(s):  
Andrew M. Fales ◽  
Stephen J. Norton ◽  
Bridget M. Crawford ◽  
Brendan G. DeLacy ◽  
Tuan Vo-Dinh
Keyword(s):  
Fano Resonance ◽  
Aggregate Formation ◽  
Gold Nanospheres ◽  
Exciton Coupling ◽  
Gold Nanosphere

A facile method to induce J-aggregate formation on gold nanospheres produced a split lineshape due to plasmon–exciton coupling. The observed splitting was shown analytically to arise from Fano resonance.

Strengthening Fano resonance on gold nanoplates with gold nanospheres

Nanoscale ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 1975-1984 ◽  
Author(s):  
Ximin Cui ◽  
Yunhe Lai ◽  
Feng Qin ◽  
Lei Shao ◽  
Jianfang Wang ◽  
...  
Keyword(s):  
Silicon Substrate ◽  
Fano Resonance ◽  
Gold Nanospheres ◽  
Gold Nanosphere

The silicon substrate-induced Fano resonance in Au nanoplates is strengthened by placing a gold nanosphere on the Au nanoplates.

scholarly journals Multipole Radiations from Large Gold Nanospheres Excited by Evanescent Wave

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 175
Author(s):  
Jingdong Chen ◽  
Jin Xiang ◽  
Shuai Jiang ◽  
Qiaofeng Dai ◽  
Shaolong Tie ◽  
...  
Keyword(s):  
Evanescent Wave ◽  
Polarized Light ◽  
Electric Quadrupole ◽  
Photonic Devices ◽  
High Order ◽  
Gold Nanospheres ◽  
Reflected Light ◽  
Gold Nanosphere ◽  
Scattering Light ◽  
Plasmon Modes

We proposed the use of the evanescent wave generated in a total internal reflection configuration to excite large gold nanospheres and investigated the radiations of the high-order plasmon modes supported in gold nanospheres. It was revealed that the evanescent wave excitation is equivalent to the excitation by using both the incident and reflected light, offering us the opportunity to control the orientation of the electric field used to excite nanoparticles. In addition, it was found that the scattering light intensity is greatly enhanced and the background noise is considerably suppressed, making it possible to detect the radiations from high-order plasmon modes. Moreover, the influence of the mirror images on the scattering induced by a metal substrate is eliminated as compared with the surface plasmon polariton excitation. By exciting a gold nanosphere with s-polarized light and detecting the scattering light with a p-polarized analyzer, we were able to reveal the radiation from the electric quadrupole mode of the gold nanosphere in both the spatial and the frequency domains. Our findings are important for characterizing the radiations from the high-order modes of large nanoparticles and useful for designing nanoscale photonic devices.

Switching plasmonic Fano resonance in gold nanosphere–nanoplate heterodimers

Nanoscale ◽  
2019 ◽  
Vol 11 (19) ◽  
pp. 9641-9653 ◽  
Author(s):  
Wenzheng Lu ◽  
Ximin Cui ◽  
Tsz Him Chow ◽  
Lei Shao ◽  
Hao Wang ◽  
...  
Keyword(s):  
Fano Resonance ◽  
Gold Nanosphere

Reversible switching of plasmonic Fano resonance is realized on gold nanosphere–nanoplate heterodimers by integrating a polyaniline layer.

scholarly journals Exploiting Nonlinear Photoacoustic Signal Generation in Gold Nanospheres for Selective Detection in Serial 3D PA Tomography

2018 ◽  
Vol 4 (12) ◽  
pp. 146 ◽  
Author(s):  
Susanne Schrof ◽  
Genny Pang ◽  
Jens Buchmann ◽  
Jan Laufer
Keyword(s):  
Gold Nanoparticles ◽  
Spatial Distribution ◽  
Signal Amplitude ◽  
Photoacoustic Signal ◽  
Selective Detection ◽  
Gold Nanospheres ◽  
Robust Detection ◽  
Tissue Phantom ◽  
Gold Nanosphere ◽  
Background Contrast

The photoacoustic (PA) signal amplitude measured in gold nanosphere suspensions has been shown to increase nonlinearly with the incident excitation fluence. In this work, this effect is exploited to recover the spatial distribution of gold nanoparticles in tomographic 3D photoacoustic (PA) images against the background contrast provided by absorbers that exhibit a linear relationship between the PA signal amplitude and the fluence. Serial tomographic PA images of a tissue phantom containing gold nanospheres and a tissue-mimicking absorber were acquired. By assessing the linearity of the PA intensity voxel by voxel, the spatial distribution of the gold nanosphere suspension was recovered. The method is shown to enable the robust detection of gold nanoparticles.

Surface Plasmons in Light Interaction With Metallic Nanostructures and Applications

2008 ◽  
Author(s):  
Li-Hsin Han ◽  
Arvind Battula ◽  
Shaochen Chen
Keyword(s):  
Surface Plasmons ◽  
Finite Difference Time Domain ◽  
Light Field ◽  
Metallic Nanostructures ◽  
Gold Nanospheres ◽  
Polymer Shell ◽  
Light Enhancement ◽  
Gold Nanosphere ◽  
Difference Time ◽  
Light Interaction

In this invited paper, we present the surface plasmons effect as a result of light interaction with metallic nanostructures such as a gold nanosphere or an array of gold nano-slits. Numerical simulation using a finite difference time domain method coupled with Drude model revealed the light enhancement near the gold nanostructures due to the surface plasmon effect. Experimentally, we demonstrated such effect in laser deformation of a polymer shell coated with gold nanospheres. We also employed such enhanced light field for nanoscale lithography.

Plasmonic fano resonance sensing system using gold nanosphere and J-aggregates

2016 ◽  
Author(s):  
Andrew Fales ◽  
Bridget M. Crawford ◽  
Stephen J. Norton ◽  
Brendan G. DeLacy ◽  
Tuan Vo-Dinh
Keyword(s):  
Fano Resonance ◽  
Sensing System ◽  
Gold Nanosphere ◽  
J Aggregates

scholarly journals Tunable Fano Resonance and Plasmon-Exciton Coupling in Single Au Nanotriangles on Monolayer WS2 at Room Temperature

2018 ◽  
Vol 30 (22) ◽  
pp. 1705779 ◽  
Author(s):  
Mingsong Wang ◽  
Alex Krasnok ◽  
Tianyi Zhang ◽  
Leonardo Scarabelli ◽  
He Liu ◽  
...  
Keyword(s):  
Fano Resonance ◽  
Room Temperature ◽  
Exciton Coupling

Adjustable plasmonic optical properties of hollow gold nanospheres monolayers and LSPR-dependent surface-enhanced Raman scattering of hollow gold nanosphere/graphene oxide hybrids

RSC Advances ◽  
2015 ◽  
Vol 5 (53) ◽  
pp. 42653-42662 ◽  
Author(s):  
Xue Gong ◽  
Jian Tang ◽  
Yixin Ji ◽  
Bingbing Wu ◽  
Huaping Wu ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Localized Surface Plasmon Resonance ◽  
Surface Enhanced Raman Scattering ◽  
Localized Surface Plasmon ◽  
Gold Nanospheres ◽  
Hollow Gold Nanospheres ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Gold Nanosphere

Colloidal hollow gold nanospheres with adjustable localized surface plasmon resonance (LSPR) properties were synthesized and self-assembled into HGNs monolayers for investigation of LSPR-dependent surface enhanced Raman scattering (SERS) behavior.

scholarly journals Fano Resonances: Tunable Fano Resonance and Plasmon-Exciton Coupling in Single Au Nanotriangles on Monolayer WS2 at Room Temperature (Adv. Mater. 22/2018)

2018 ◽  
Vol 30 (22) ◽  
pp. 1870155
Author(s):  
Mingsong Wang ◽  
Alex Krasnok ◽  
Tianyi Zhang ◽  
Leonardo Scarabelli ◽  
He Liu ◽  
...  
Keyword(s):  
Fano Resonance ◽  
Room Temperature ◽  
Fano Resonances ◽  
Exciton Coupling

A Simple and Rapid Method to Determine GPIIb/IIIa-Receptor Inhibitor Activity in Whole Blood

1999 ◽  
Vol 19 (03) ◽  
pp. 134-138
Author(s):  
Gitta Kühnel ◽  
A. C. Matzdorff
Keyword(s):  
Flow Cytometry ◽  
Platelet Count ◽  
Blood Sample ◽  
Platelet Activation ◽  
Whole Blood ◽  
Receptor Occupancy ◽  
Aggregate Formation ◽  
Inhibitor Activity ◽  
Receptor Inhibitor

SummaryWe studied the effect of GPIIb/IIIa-inhibitors on platelet activation with flow cytometry in vitro. Citrated whole blood was incubated with increasing concentrations of three different GPIIb/IIIa-inhibitors (c7E3, DMP728, XJ757), then thrombin or ADP were added and after 1 min the sample was fixed. Samples without c7E3 but with 0.1 U/ml thrombin had a decrease in platelet count. Samples with increasing concentrations of c7E3 had a lesser or no decrease in platelet count. The two other inhibitors (DMP 725, XJ757) gave similar results. GPIIb/IIIa-inhibitors prevent aggregate formation and more single platelets remain in the blood sample. The agonist-induced decrease in platelet count correlates closely with the concentration of the GPIIb/IIIa inhibitor and receptor occupancy. This correlation may be used as a simple measure for inhibitor activity in whole blood.

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