scholarly journals Three-Dimensional Micro- and Nano-Structuring of Materials by Tightly Focused Laser Radiation

2008 ◽  
Vol 81 (4) ◽  
pp. 411-448 ◽  
Author(s):  
Saulius Juodkazis ◽  
Vygantas Mizeikis ◽  
Shigeki Matsuo ◽  
Kosei Ueno ◽  
Hiroaki Misawa
Keyword(s):  
Laser Radiation ◽  
Three Dimensional

scholarly journals Fabrication of 3D microchannels for tissue engineering in photosensitive glass using NIR femtosecond laser radiation

2019 ◽  
Vol 5 (1) ◽  
pp. 34-45 ◽  
Author(s):  
Ulrike Brokmann ◽  
Tobias Milde ◽  
Edda Rädlein ◽  
Klaus Liefeith
Keyword(s):  
Tissue Engineering ◽  
Laser Radiation ◽  
Femtosecond Laser ◽  
Raw Materials ◽  
Glass Structure ◽  
Three Dimensional ◽  
Silver Ions ◽  
Laser Exposure ◽  
Femtosecond Laser Radiation ◽  
Rate Ratios

Abstract The biocompatibility of photosensitive glasses allows various biomedical applications; one is the field of tissue engineering and more precisely microengineered tissue-on-a-chip platforms to study the tissue microenvironment and disease modelling. Three dimensional architectures of adapted components are required for modern materials. A photosensitive lithiumalumosilicate glass FS21 was investigated regarding the interaction with a Ti:Sapphire laser systemto build three dimensional buried channels inside the glass. Femtosecond laser radiation with a wavelength of 800 nm and pulse duration of 140 fs was used to modify the glass structure. Subsurface channel geometries were achieved by a subsequent thermal treatment and were formed into capillaries using wet chemical etching of the exposed and crystallised channels. Contrary to ultraviolet (UV) exposure, spectral optical investigations showed that fs laser exposure caused various radiation induced defects in the base glass coupled with the generation of photoelectrons for the photochemical modification of silver ions. We observed an outgassing of different species coming from raw materials of the original glass batch during the glass crystallisation process. Etch rate ratios differ between 1:25 and 1:45 and are dependent on: stoichiometric deviation between surface and bulk, crystal size and distribution and exchange of the etching agent in narrow capillaries.

Computer Simulation of the Three-Dimensional Regime of Proton Acceleration in the Interaction of Laser Radiation with a Thin Spherical Target

2001 ◽  
Vol 27 (5) ◽  
pp. 363-371 ◽  
Author(s):  
H. Ruhl ◽  
S. V. Bulanov ◽  
T. E. Cowan ◽  
T. V. Liseĭkina ◽  
P. Nickles ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Laser Radiation ◽  
Three Dimensional ◽  
Proton Acceleration ◽  
Spherical Target

scholarly journals THREE-DIMENSIONAL MODEL OF QUANTUM DOTS' SELF-ASSEMBLY UNDER THE ACTION OF LASER RADIATION

2017 ◽  
Vol 41 (4) ◽  
pp. 577-580 ◽  
Author(s):  
V. A. Tkachenko ◽  
A. S. Tsipotan ◽  
A. S. Aleksandrovsky ◽  
V. V. Slabko
Keyword(s):  
Quantum Dots ◽  
Laser Radiation ◽  
Self Assembly ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model

Liquid-Phase Sintering of Tungsten Carbide-Cobalt by Laser Radiation

2008 ◽  
Author(s):  
Thorsten Glaeser ◽  
Axel Demmer ◽  
Fritz Klocke
Keyword(s):  
Laser Radiation ◽  
Liquid Phase ◽  
Tungsten Carbide ◽  
Three Dimensional ◽  
Laser Sintering ◽  
Liquid Phase Sintering ◽  
Binder Phase ◽  
Metal Binder ◽  
Powder Metallurgical Process ◽  
Melting Material

Laser Sintering is a powder metallurgical process. The principle of Laser Sintering is based on a local densification of powdered materials as a result of the absorption of laser radiation. Through a cyclic repetition of material application, densification and the lowering of a build-up plate, a three dimensional geometry develops. Within the Laser Sintering (liquid-phase sintering) of tungsten carbide-cobalt (WC-Co) the low melting material, the metal binder phase cobalt, is temporarily transferred into the liquid phase. The high melting WCphase is not melted and remains fine dispersed in the metal binder phase after cooling of the material.

scholarly journals Micro-fabrication by laser radiation forces: A direct route to reversible free-standing three-dimensional structures

2012 ◽  
Vol 20 (22) ◽  
pp. 24735 ◽  
Author(s):  
Loukas Athanasekos ◽  
Miltiadis Vasileiadis ◽  
Christos Mantzaridis ◽  
Vagelis C. Karoutsos ◽  
Ioannis Koutselas ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Three Dimensional ◽  
Free Standing ◽  
Micro Fabrication ◽  
Direct Route ◽  
Radiation Forces
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