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… 

Figures from this paper

Atomic/Molecular-Level Simulations of Laser–Materials Interactions

Molecular/atomic-level computer modeling of laser–materials interactions is playing an increasingly important role in the investigation of complex and highly nonequilibrium processes involved in

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

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.

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

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

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

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