Results 41 to 50 of about 1,293,751 (246)

Experimental and Simulation Research on Femtosecond Laser Induced Controllable Morphology of Monocrystalline SiC

Micromachines
Silicon carbide (SiC) is utilized in the automotive, semiconductor, and aerospace industries because of its desirable characteristics. Nevertheless, the traditional machining method induces surface microcracks, low geometrical precision, and severe tool ...
Yang Hua, Zhenduo Zhang, Jiyu Du, Xiaoliang Liang, Wei Zhang, Yukui Cai, Quanjing Wang   +6 more
doaj   +1 more source

High‐Quality Femtosecond Laser Surface Micro/Nano‐Structuring Assisted by A Thin Frost Layer

Advanced Materials Interfaces, 2023
Femtosecond laser ablation has been demonstrated to be a versatile tool to produce micro/nanoscale features with high precision and accuracy. However, the use of high laser fluence to increase the ablation efficiency usually results in unwanted effects ...
Wenhai Gao, Kai Zheng, Yang Liao, Henglei Du, Chengpu Liu, Chengrun Ye, Ke Liu, Shaoming Xie, Cong Chen, Junchi Chen, Yujie Peng, Yuxin Leng   +11 more
doaj   +1 more source

A new flow chip in combination with multiphoton microscopy as a protocol for longitudinal 3D imaging of tissue calcification under shear stress

FEBS Open Bio, EarlyView.
Miniaturized flow chip platform enabling continuous perfusion and longitudinal multiphoton 3D imaging of vascular smooth muscle cell constructs under physiological flow. Brightfield imaging guides region selection, while CellTracker Green and mRuby‐labeled fetuin‐A visualize cells and mineral deposition, respectively. Magnesium supplementation markedly
Vytautas Kučikas, Aaron D. Morgan, Ignas Čiurlionis, Christian Böhm, Stefan Jockenhövel, Willi Jahnen‐Dechent, Marc A. M. J. van Zandvoort   +6 more
wiley   +1 more source

Critical Time to Nucleation: Graphite and Silicon Nanoparticle Generation by Laser Ablation

Journal of Nanotechnology, 2009
Femtosecond laser ablation hydrodynamics has been analyzed numerically. The nucleation process of two materials (silicon and graphite) in an expanding plume produced by a femtosecond laser ablation is analyzed within the framework of the Zeldovich-Raizer
Sid Senadheera, Bo Tan, Krishnan Venkatakrishnan   +2 more
doaj   +1 more source

Processing and Profile Control of Microhole Array for PDMS Mask with Femtosecond Laser

Micromachines, 2022
Polydimethylsiloxane (PDMS) is hailed as one of the foundational materials that have been applied to different products in various fields because of its chemical resistance, low cost, excellent flexibility, and high molding capability.
Xifang Zhang, Zhenqiang Yao, Zhibao Hou, Jiacheng Song   +3 more
doaj   +1 more source

Nanofibre Fabrication by Femtosecond Laser Ablation of Silica Glass [PDF]

Optics Express, 2011
<p>This article presents a fabrication technique for generating densely populated and randomly oriented silica nanofibres by direct ablation of silica glass using a femtosecond laser with 12.4 MHz repetition rate and a pulse width of 214 fs, under ambient conditions. Four types of nanofibres with diameters ranging from a few tens of nanometers to
Venkatakrishnan, Krishnan (Author), Vipparty, Dheeraj (Author), Tan, Bo (Author)   +2 more
openaire   +3 more sources

Nanosecond ablation of alumina with an ytterbium fibre-laser: experimental study, topography and damage evaluation [PDF]

, 2014
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Florianópolis, 2014.Abstract : The use of advanced ceramics has been limited by the high machining costs, with grinding and ...
Gomes, Diego Ribas
core  

The art and science of femtosecond laser writing [PDF]

, 2009
We demonstrate how femtosecond laser writing can challenge common beliefs in optics. Recently discovered phenomena of quill writing related to self-assembled nanostructuring in glasses and non-reciprocal laser writing in crystals are ...
Kazansky, P.G., Kazuyuki Hirao, Hirao, K., Yuri P. Svirko, Svirko, Y.P., Shimotsuma, Y., Yasuhiko Shimotsuma, Peter G. Kazansky, Martynas Beresna, Beresna, Martynas   +9 more
core   +1 more source

Comparative assessment of crystallographic and cryo‐EM models in the Protein Data Bank

FEBS Open Bio, EarlyView.
Raw data obtained by X‐ray crystallography or cryo‐EM result in experimental maps, ultimately fitted by atomic models. Although the physical principles are different, the final results can be viewed, compared, and evaluated in the same way. With cryogenic electron microscopy (cryo‐EM) on track to surpass X‐ray crystallography as the preferred method ...
Alexander Wlodawer, Pawel Rubach, Zbigniew Dauter, Wojciech Dec, Dariusz Brzezinski, Marta Kulik, Wladek Minor, Mariusz Jaskolski   +7 more
wiley   +1 more source

SILICON SURFACE MICROSTRUCTURING BY SINGLE-EXPOSURE FEMTOSECOND DOUBLE LASER PULSE [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2019
Subject of Research. The paper evaluates the possibility of periodic microstructures formation on the silicon surface by single-exposure double femtosecond laser pulse. Method.
E. V. Kuzmin, G. D. Shandybina, D. S. Polyakov, A. A. Samokhvalov   +3 more
doaj   +1 more source