Surface nanotexturing of tantalum by laser ablation in water

Journal Article · Sat Jan 31 00:00:00 EST 2009 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2009V039N01ABEH013877· OSTI ID:21470154

Barmina, E V; Simakin, Aleksandr V; Shafeev, Georgii A ^[1]; Barberoglu, M; Zorba, V; Stratakis, E; Fotakis, K ^[2]

---

1. Wave Research Centre, A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
2. Foundation for Research and Technology-Hellas (IESL-FORTH), Institute of Electronic Structure and Lasers, Crete (Greece)

Surface nanotexturing of tantalum by ablation with short laser pulses in water has been studied experimentally using three ablation sources: a neodymium laser with a pulse duration of 350 ps, an excimer laser (248 nm) with a pulse duration of 5 ps and a Ti:sapphire laser with a pulse duration of 180 fs. The morphology of the nanotextured surfaces has been examined using a nanoprofilometer and field emission scanning electron microscope. The results demonstrate that the average size of the hillocks produced on the target surface depends on the laser energy density and is {approx}200 nm at an energy density approaching the laser-melting threshold of tantalum and a pulse duration of 350 ps. Their surface density reaches 10{sup 6} cm{sup -2}. At a pulse duration of 5 ps, the average hillock size is 60-70 nm. Nanotexturing is accompanied by changes in the absorption spectrum of the tantalum surface in the UV and visible spectral regions. The possible mechanisms of surface nanotexturing and potential applications of this effect are discussed. (nanostructures)

• OSTI ID: 21470154
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 39, Issue 1; Other Information: DOI: 10.1070/QE2009v039n01ABEH013877; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABLATION
ABSORPTION SPECTRA
ENERGY DENSITY
EXCIMER LASERS
FIELD EMISSION
MELTING
MORPHOLOGY
NANOSTRUCTURES
NEODYMIUM LASERS
PULSES
SAPPHIRE
SCANNING ELECTRON MICROSCOPY
SURFACES
TANTALUM
WATER
CORUNDUM
ELECTRON MICROSCOPY
ELEMENTS
EMISSION
GAS LASERS
HYDROGEN COMPOUNDS
LASERS
METALS
MICROSCOPY
MINERALS
OXIDE MINERALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
REFRACTORY METALS
SOLID STATE LASERS
SPECTRA
TRANSITION ELEMENTS