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Physical insight in the fluence-dependent distributions of Au nanoparticles produced by sub-picosecond UV pulsed laser ablation of a solid target in vacuum environment
Physical insight in the fluence-dependent distributions of Au nanoparticles produced by sub-picosecond UV pulsed laser ablation of a solid target in vacuum environment
- Source :
- Applied Surface Science. 480:330-340
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Deposition of Au nanoparticles (NPs) through UV ultra-short-pulse laser ablation in vacuum is a methodology suitable for obtaining high purity supported plasmonic NPs with a superb adherence to both planar and patterned substrates. Furthermore, the peculiarity that upon sub-picosecond laser irradiation NPs form directly within the target leads to narrow and controlled size-distribution. While extensive literature theoretically models phase changes and pressure relaxation of metal targets under sub-picosecond irradiation, the evolution of the nanostructured deposit through different ablation regimes is poorly documented experimentally. In this paper, besides modeling the temporal evolution of electron and lattice temperature following sub-picosecond laser pulse irradiation of Au bulk at the threshold ablation fluence (0.1 J/cm2), we report an accurate statistical, morphological and structural characterization of the AuNP distributions as a function of the laser fluence tuned from 0.1 to 3 J/cm2 to drive the target through two ablation regimes. The occurrence of photomechanical spallation and phase explosion at low and high fluence, respectively, is correlated with the evolution of the NP deposits, which are discussed by providing a physical insight in the interplay between fluence-driven ablation regimes of the target, arrangement kinetics of the deposited species (NPs and vapour species) and (crystalline or amorphous) phase of the NPs. This knowledge is key for controlling the surface plasmon resonance response of AuNPs depending on the designed application.
- Subjects :
- ELECTRON THERMALIZATION
Materials science
SPALLATION
medicine.medical_treatment
General Physics and Astronomy
02 engineering and technology
METAL TARGETS
010402 general chemistry
01 natural sciences
Fluence
law.invention
law
Phase (matter)
medicine
Irradiation
Plasmon
Laser ablation
business.industry
OPTICAL-PROPERTIES
Surfaces and Interfaces
General Chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Ablation
Laser
0104 chemical sciences
Surfaces, Coatings and Films
Amorphous solid
HIGH-POWER
SIZE
MOLECULAR-DYNAMICS
GOLD NANOPARTICLES
LIQUID
Optoelectronics
0210 nano-technology
business
GENERATION
Subjects
Details
- ISSN :
- 01694332
- Volume :
- 480
- Database :
- OpenAIRE
- Journal :
- Applied Surface Science
- Accession number :
- edsair.doi.dedup.....c597f4d1c45292556a75b3a0bed0e7d4
- Full Text :
- https://doi.org/10.1016/j.apsusc.2019.02.022