scholarly journals High efficiency fabrication of complex microtube arrays by scanning focused femtosecond laser Bessel beam for trapping/releasing biological cells

2017 ◽  
Vol 25 (7) ◽  
pp. 8144 ◽  
Author(s):  
Liang Yang ◽  
Shengyun Ji ◽  
Kenan Xie ◽  
Wenqiang Du ◽  
Bingjie Liu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
High Efficiency ◽  
Bessel Beam ◽  
Biological Cells

scholarly journals Antireflective and Superhydrophilic Structure on Graphite Written by Femtosecond Laser

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 236
Author(s):  
Rui Lou ◽  
Guangying Li ◽  
Xu Wang ◽  
Wenfu Zhang ◽  
Yishan Wang ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Near Infrared ◽  
High Efficiency ◽  
Electronic Devices ◽  
Sample Surface ◽  
Graphite Surface ◽  
Hazardous Substances ◽  
Functional Surface ◽  
Nano Structures ◽  
Average Reflectance

Antireflection and superhydrophilicity performance are desirable for improving the properties of electronic devices. Here, we experimentally provide a strategy of femtosecond laser preparation to create micro-nanostructures on the graphite surface in an air environment. The modified graphite surface is covered with abundant micro-nano structures, and its average reflectance is measured to be 2.7% in the ultraviolet, visible and near-infrared regions (250 to 2250 nm). The wettability transformation of the surface from hydrophilicity to superhydrophilicity is realized. Besides, graphene oxide (GO) and graphene are proved to be formed on the sample surface. This micro-nanostructuring method, which demonstrates features of high efficiency, high controllability, and hazardous substances zero discharge, exhibits the application for functional surface.

scholarly journals Electric Field Assisted Femtosecond Laser Preparation of Au@TiO2 Composites with Controlled Morphology and Crystallinity for Photocatalytic Degradation

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3816
Author(s):  
Xiaojie Li ◽  
Xin Li ◽  
Pei Zuo ◽  
Xiaozhe Chen ◽  
Misheng Liang ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Electric Field ◽  
Photocatalytic Degradation ◽  
Au Nanoparticles ◽  
High Efficiency ◽  
Free Electron Density ◽  
Pulse Delay ◽  
Dye Pollutants ◽  
Amorphous Tio2 ◽  
Laser Liquid

TiO2 is popular in photocatalytic degradation dye pollutants due to its abundance and its stability under photochemical conditions. Au loaded TiO2 can achieve efficient absorption of visible light and deal with the problem of low conversion efficiency for solar energy of TiO2. This work presents a new strategy to prepare Au nanoparticles-loaded TiO2 composites through electric−field−assisted temporally−shaped femtosecond laser liquid-phase ablation of Au3+ and amorphous TiO2. By adjusting the laser pulse delay and electric field parameters, gold nanoparticles with different structures can be obtained, such as nanospheres, nanoclusters, and nanostars (AuNSs). AuNSs can promote the local crystallization of amorphous TiO2 in the preparation process and higher free electron density can also be excited to work together with the mixed crystalline phase, hindering the recombination between carriers and holes to achieve efficient photocatalytic degradation. The methylene blue can be effectively degraded by 86% within 30 min, and much higher than the 10% of Au nanoparticles loaded amorphous TiO2. Moreover, the present study reveals the crystallization process and control methods for preparing nanoparticles by laser liquid ablation, providing a green and effective new method for the preparation of high-efficiency photocatalytic materials.

Non-diffraction-length Bessel-beam femtosecond laser drilling of high-aspect-ratio microholes in PMMA

Optik ◽  
2021 ◽  
Vol 229 ◽  
pp. 166295
Author(s):  
Haoran Wang ◽  
Fan Zhang ◽  
Kaiwen Ding ◽  
Ji'an Duan
Keyword(s):  
Aspect Ratio ◽  
Femtosecond Laser ◽  
High Aspect Ratio ◽  
Bessel Beam ◽  
Laser Drilling

Femtosecond laser ablation of dielectric layers for high-efficiency silicon wafer solar cells

Solar Energy ◽  
2018 ◽  
Vol 164 ◽  
pp. 287-291 ◽  
Author(s):  
Jaffar Moideen Yacob Ali ◽  
Vinodh Shanmugam ◽  
Bianca Lim ◽  
Armin G. Aberle ◽  
Thomas Mueller
Keyword(s):  
Solar Cells ◽  
Laser Ablation ◽  
Femtosecond Laser ◽  
Silicon Wafer ◽  
High Efficiency ◽  
Femtosecond Laser Ablation ◽  
Dielectric Layers

scholarly journals Superamphiphobic Surfaces with Controllable Adhesion Fabricated by Femtosecond Laser Bessel Beam on PTFE

2019 ◽  
Vol 6 (14) ◽  
pp. 1900550 ◽  
Author(s):  
Dongkai Chu ◽  
Subhash C. Singh ◽  
Jiale Yong ◽  
Zhibing Zhan ◽  
Xiaoyan Sun ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Bessel Beam

Ablation enhancement of fused silica glass by femtosecond laser double-pulse Bessel beam

2020 ◽  
Vol 37 (11) ◽  
pp. 3535
Author(s):  
Dongkai Chu ◽  
Peng Yao ◽  
Xiaoyan Sun ◽  
Kai Yin ◽  
Chuanzhen Huang
Keyword(s):  
Femtosecond Laser ◽  
Silica Glass ◽  
Bessel Beam ◽  
Fused Silica ◽  
Double Pulse ◽  
Fused Silica Glass
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