Additional external electromagnetic fields for laser microprocessing of metals

Abstract

Ultra-short pulsed laser processing is a potent tool for microstructuring of a lot of materials. At certain laser parameters, particular periodical and/or quasi-periodical µm-size surface structures evolve apparently during processing. With extended plasmonics theory, it is possible to predict the structure formation, and a systematic technology can be derived to alter the surface for laser processing. In this work, we have demonstrated the modification of the laser processing with applying tailored dynamic surface electro-magnetic fields. Possible improvement in applications is seen in the fields of process efficiency of laser ablation and a superior control of the surface topography.

Synthesis and biological activities of organoaluminum steroids

“…Aluminum (Al, atomic number 13), an amazing paramagnetic metal with high thermal conductivity, high electrical conductivity, and, most importantly, high resistance to corrosion, as it quickly forms strong oxide films that protect the metal surface from further interaction. [1,2] For the first time, aluminum was obtained by the Danish physicist Hans Christian Ørstedin 1825. [3] Organoaluminum chemistry is part of the organometallic chemistry that studies the compounds of aluminum and carbon, as well as their chemical bonds (C-Al).…”