Plasma-Mediated Nanocavitation and Photothermal Effects in Ultrafast Laser Irradiation of Gold Nanorods in Water

2013 ◽  
Vol 117 (18) ◽  
pp. 9386-9396 ◽  
Author(s):  
Étienne Boulais ◽  
Rémi Lachaine ◽  
Michel Meunier
Keyword(s):  
Laser Irradiation ◽  
Gold Nanorods ◽  
Ultrafast Laser ◽  
Photothermal Effects

scholarly journals Research on the Response Characteristics of Vanadium Pentoxide Film to the Irradiation of Ultrafast Pulsed Laser

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2078
Author(s):  
Qianqian Shi ◽  
Guodong Zhang ◽  
Yuheng Wang ◽  
Yu Lan ◽  
Jiang Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Laser Irradiation ◽  
Vanadium Pentoxide ◽  
Modulation Depth ◽  
Ultrafast Laser ◽  
Stable Phase ◽  
Saturable Absorption ◽  
Third Order ◽  
The Third ◽  
Structural Responses

Vanadium pentoxide (V2O5) is the most stable phase among many transition metal vanadium oxides, and has already been widely used in many fields. In this study, the morphological, structural, and optical responses of V2O5 film to ultrafast laser irradiation was investigated. The third-order nonlinear optical properties of V2O5 film were measured by common Z-scan technique, and the results showed that V2O5 film has self-defocusing and saturable absorption characteristics. The third-order nonlinear absorption coefficient and nonlinear refractive index were calculated to be −338 cm/GW and −3.62 × 10−12 cm2/W, respectively. The tunable saturated absorption with modulation depth ranging from 13.8% to 29.3% was realized through controlling the thickness of vanadium pentoxide film. V2O5 film was irradiated by ultrafast laser with variable pulse energy, and the morphological and structural responses of the V2O5 to the laser with different energy densities were investigated. The irreversible morphological and structural responses of V2O5 films to ultrafast laser irradiation was analyzed using the phase-contrast microscope and Raman spectrum. The chemical structure change from V2O5 to V6O13 was considered the main reason for refractive index modification.

Thermal Transport From Gold Nanorod to Solvent, an Investigation of Ligand Effects by Ultrafast Laser Spectroscopy

2008 ◽  
Author(s):  
Joshua Alper ◽  
Aaron Schmidt ◽  
Kimberly Hamad-Schifferli
Keyword(s):  
Heat Transfer ◽  
Thermal Properties ◽  
Gold Nanorods ◽  
Thermal Transport ◽  
Ultrafast Laser ◽  
Ultrafast Laser Spectroscopy ◽  
Optical Pump ◽  
Thermal Interface ◽  
Pump Probe ◽  
Ligand Effects

To facilitate analysis of nanoscale heat transfer in nanoparticle systems the thermal properties of ligand layers must be understood. To this end, we use an optical pump-probe technique to study the thermal transport across ligands on gold nanorods and into the solvent. We find that varying properties of the ligand can have large impacts on the thermal decay of a nanorod after exposure to a laser pulse. By raising the concentration of free CTAB from 1 mM and 10 mM in solutions, the CTAB layer’s effective thermal interface conductance increases three fold. The transition occurs near the CTAB critical micelle concentration. Similar results are found for other ligand layers.

scholarly journals Plasmonic photothermal microneedle arrays and single needles for minimally-invasive deep in-skin hyperthermia

2020 ◽  
Vol 8 (25) ◽  
pp. 5425-5433 ◽  
Author(s):  
Álvaro Cárcamo-Martínez ◽  
Brónach Mallon ◽  
Juan Domínguez-Robles ◽  
A. Sara Cordeiro ◽  
Maurizio Celentano ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Laser Irradiation ◽  
Gold Nanorods ◽  
Near Infrared ◽  
Skin Model ◽  
Thickness Skin ◽  
Microneedle Arrays ◽  
First Time ◽  
Nir Laser ◽  
Deep Hyperthermia

We report, for the first time, crosslinked polymeric microneedle (MN) arrays and single needles (2 mm and 4.5 mm length) coated with gold nanorods (GnRs) to induce deep hyperthermia in a 3 mm-thickness skin model upon near infrared (NIR) laser irradiation.

Photothermal effects on protein adsorption dynamics of PEGylated gold nanorods

2019 ◽  
Vol 15 ◽  
pp. 599-604 ◽  
Author(s):  
Ester Polo ◽  
Vida Araban ◽  
Beatriz Pelaz ◽  
Aitor Alvarez ◽  
Pablo Taboada ◽  
...  
Keyword(s):  
Protein Adsorption ◽  
Gold Nanorods ◽  
Adsorption Dynamics ◽  
Photothermal Effects

Transformation of Gold Nanorods in Liquid Media Induced by nIR, Visible, and UV Laser Irradiation

2015 ◽  
Vol 119 (23) ◽  
pp. 13343-13349 ◽  
Author(s):  
Yasser A. Attia ◽  
M. Teresa Flores-Arias ◽  
Daniel Nieto ◽  
Carlos Vázquez-Vázquez ◽  
Germán F. De La Fuente ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Gold Nanorods ◽  
Uv Laser ◽  
Liquid Media
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