Ultrafast laser ablation of graphite

被引：72

作者：

Lenner, M. ^{[1
]}

Kaplan, A. ^{[2
]}

Huchon, Ch. ^{[2
]}

Palmer, R. E. ^{[2
]}

机构：

[1] Hungarian Acad Sci, Res Inst Solid State Phys & Opt, H-1121 Budapest, Hungary

[2] Univ Birmingham, Sch Phys & Astron, Nanoscale Phys Res Lab, Birmingham B15 2TT, W Midlands, England

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 18期

基金：

英国工程与自然科学研究理事会;

关键词：

atomic force microscopy; dissociation; graphite; high-speed optical techniques; laser ablation; nanostructured materials; Raman spectra; surface dynamics; surface structure; time of flight spectra; ORIENTED PYROLYTIC-GRAPHITE; FEMTOSECOND-LASER; OPTICAL-PROPERTIES; CARBON NANOTUBES; LIQUID CARBON; VACUUM; RAMAN; SPECTROSCOPY; COMPOSITES; EMISSION;

D O I：

10.1103/PhysRevB.79.184105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied single-shot femtosecond laser ablation of graphite by combining a variety of experimental techniques including Raman spectroscopy, atomic force microscopy as well as time of flight spectrometry. The comprehensive analysis reveals insights into the ablation process by exploring the surface structure, the fluence dependence, and the structural dynamics of the detachment. The results show formation and detachment of charged carbon products (such as graphene nanoflakes) from the surface. Time-resolved measurements of ion yields and velocities reveal strong quenching and revival of Coulomb explosion as a function of delay time in the range of 100-200 fs, suggesting a displacive motion between the topmost surface layers which regulates the optical properties of the system.

引用

页数：11

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