Laser induced non-thermal deposition of ultrathin graphite | Zendy

Martin Reininghaus | Zendy; Daniel Wortmann | Zendy; Johannes Finger | Zendy; O. Faley | Zendy; R. Poprawe | Zendy; Christoph Stampfer | Zendy

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Laser induced non-thermal deposition of ultrathin graphite

Author(s) -

Martin Reininghaus,

Daniel Wortmann,

Johannes Finger,

O. Faley,

R. Poprawe,

Christoph Stampfer

Publication year - 2012

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3703599

Subject(s) - materials science , graphite , raman spectroscopy , laser ablation , fluence , evaporation , laser , ablation , thermal , composite material , deposition (geology) , pulsed laser deposition , irradiation , optics , nanotechnology , thin film , paleontology , physics , engineering , sediment , biology , meteorology , nuclear physics , thermodynamics , aerospace engineering

We present a laser induced ablation process to fabricate ultrathin graphitic flakes. By varying the fluence of the ablating pulsed fs-laser radiation, we identify distinct values for "thermal" evaporation and so-called "non-thermal" ablation of graphitic flakes. The presence of the non-thermal ablation is a direct consequence of the strong asymmetry of the bonding strength in normal and in-plane direction in layered materials, such as graphite. The experimentally extracted non-thermal ablation threshold for graphite of 250 mJ/cm 2 agrees well with theoretical predictions. Finally, we deposited ultrathin graphitic flakes of 50 m 2 in size, which we characterize by Raman spectroscopy and scanning force microscopy

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