Laser ablation of bicomponent systems: A probe of molecular ejection mechanisms

@article{Yingling2001LaserAO,
  title={Laser ablation of bicomponent systems: A probe of molecular ejection mechanisms},
  author={Yaroslava G. Yingling and Leonid V. Zhigilei and Barbara J Garrison and Antonis Koubenakis and John Labrakis and Savas K. Georgiou},
  journal={Applied Physics Letters},
  year={2001},
  volume={78},
  pages={1631-1633}
}
A combined experimental and molecular dynamics simulation study of laser ablation of a model bicomponent system with solutes of different volatility provides a consistent picture of the mechanisms of material ejection. The comparison of the ejection yields shows that there are two distinct regimes of molecular ejection, desorption at low laser fluences, and a collective ejection of a volume of material or ablation at higher fluences. Ejection of volatile solutes dominates in the desorption… 
View via Publisher
faculty.virginia.edu
27 Citations
Background Citations
3

Figures from this paper

27 Citations

Photochemical ablation of organic solids

The role of the photochemical fragmentation in laser ablation: a molecular dynamics study

Pulse dependence of ejection efficiencies in the UV ablation of bi-component van der Waals solids

Molecular dynamics simulations of matrix-assisted laser desorption—connections to experiment

On the correlation between the photoexcitation pathways and the critical energies required for ablation of poly(methyl methacrylate): A molecular dynamics study

The energetics initiating ablation in poly(methyl methacrylate) (PMMA) are studied using molecular dynamics (MD) simulation. The critical energy to initiate ablation in PMMA following the absorption…

Incorporation of chemical reactions into UV photochemical ablation of coarse-grained material

Pulsed Laser Ablation of Soft Biological Tissues

This chapter presents a conceptual framework providing mechanistic links between various ablation applications and the underlying thermodynamic and phase change processes and defines pulsed laser ablation as the use of laser pulses with duration of ~1 ms or less for the incision or removal of tissue regardless of the photophysical or photochemical processes involved.

Chapter 14 Pulsed Laser Ablation of Soft Biological Tissues

This chapter presents a conceptual framework providing mechanistic links between various ablation applications and the underlying thermodynamic and phase change processes and defines pulsed laser ablation as the use of laser pulses with duration of ∼1 ms or less for the incision or removal of tissue regardless of the photophysical or photochemical processes involved.

Particle-in-cell simulation of the pulsed planar expansion of a fully ionized plasma off a surface

Using particle-in-cell computer simulation, the expansion of a plasma formed by isothermal evaporation of ions and electrons off a planar wall into a vacuum is investigated. The hydrodynamical and…

Desorption and ablation regimes in UV-MALDI: the critical fluence

Although MALDI is a widely used technique, there is so far no theoretical description able to reproduce some critical aspects of the experimental results. For example, there is experimental as well…

References

SHOWING 1-10 OF 39 REFERENCES

Molecular dynamics simulation study of the fluence dependence of particle yield and plume composition in laser desorption and ablation of organic solids

Two distinct regimes of molecular ejection separated by a well-defined threshold fluence are observed in molecular dynamics simulation of pulsed laser irradiation of an organic solid. At fluences…

On the threshold behavior in laser ablation of organic solids

Phase transition at low fluences in laser desorption of organic solids: a molecular dynamics study

Microscopic mechanisms of laser ablation of organic solids in the thermal and stress confinement irradiation regimes

The results of large-scale molecular dynamics simulations demonstrate that the mechanisms responsible for material ejection as well as most of the parameters of the ejection process have a strong…

Mechanisms of laser ablation from molecular dynamics simulations: dependence on the initial temperature and pulse duration

Abstract. The effect of the initial sample temperature and laser pulse duration on the mechanisms of molecular ejection from an irradiated molecular solid is investigated by large-scale molecular…

MOLECULAR DYNAMICS MODEL FOR LASER ABLATION AND DESORPTION OF ORGANIC SOLIDS

A breathing sphere model is developed for molecular dynamics simulations of laser ablation and desorption of organic solids. An approximate representation of the internal molecular motion permits a…

The importance of the plume ejection time for the fragmentation yields observed in the UV ablation of molecular van der Waals films. Ablation of chlorobenzene films at 248 nm

Molecular Dynamics Study of Vibrational Excitation Dynamics and Desorption in Solid O2

Molecular dynamics calculations were performed to describe vibrational to translational energy transfer processes leading to desorption in a low cohesive energy solid excited by a laser pulse. In…

Laser-induced molecular desorption and particle ejection from organic films

A comparative study of the desorption efficiencies in the UV irradiation of molecular van der Waals films above and below the ablation threshold

Abstract. In the irradiation of thick films of aromatics (C6H5Cl and C6H5CH3 enriched with dopants of varying volatilities), the attainment of the threshold is shown to result in qualitatively…