scholarly journals Fabrication of a Hydrophilic Line on a Hydrophobic Surface by Laser Ablation Processing

Micromachines ◽  
2018 ◽  
Vol 9 (5) ◽  
pp. 208 ◽  
Author(s):  
Minkyung Kim ◽  
Jiwhan Noh
Keyword(s):  
Laser Ablation ◽  
Hydrophobic Surface

Fabrication of a super-hydrophobic surface on metal using laser ablation and electrodeposition

2014 ◽  
Vol 288 ◽  
pp. 222-228 ◽  
Author(s):  
Min Ho Kwon ◽  
Hong Shik Shin ◽  
Chong Nam Chu
Keyword(s):  
Laser Ablation ◽  
Hydrophobic Surface

scholarly journals Droplet Impact on the Super-Hydrophobic Surface with Micro-Pillar Arrays Fabricated by Hybrid Laser Ablation and Silanization Process

Materials ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 765 ◽  
Author(s):  
Zhenyan Xia ◽  
Yuhe Xiao ◽  
Zhen Yang ◽  
Linan Li ◽  
Shibin Wang ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Hydrophobic Surface ◽  
Solid Surfaces ◽  
Geometrical Parameters ◽  
Generation Process ◽  
Sliding Angle ◽  
Spreading Factor ◽  
Pillar Arrays ◽  
Surface Morphologies ◽  
Maximum Spreading

A super-hydrophobic aluminum alloy surface with decorated pillar arrays was obtained by hybrid laser ablation and further silanization process. The as-prepared surface showed a high apparent contact angle of 158.2 ± 2.0° and low sliding angle of 3 ± 1°. Surface morphologies and surface chemistry were explored to obtain insights into the generation process of super-hydrophobicity. The main objective of this current work is to investigate the maximum spreading factor of water droplets impacting on the pillar-patterned super-hydrophobic surface based on the energy conservation concept. Although many previous studies have investigated the droplet impacting behavior on flat solid surfaces, the empirical models were proposed based on a few parameters including the Reynolds number (Re), Weber number (We), as well as the Ohnesorge number (Oh). This resulted in limitations for the super-hydrophobic surfaces due to the ignorance of the geometrical parameters of the pillars and viscous energy dissipation for liquid flow within the pillar arrays. In this paper, the maximum spreading factor was deduced from the perspective of energy balance, and the predicted results were in good agreement with our experimental results with a mean error of 4.99% and standard deviation of 0.10.

Observations on the growth of YBa2Cu3O7-δ thin films on MgO by pulsed-laser ablation

1991 ◽  
Vol 49 ◽  
pp. 1068-1069
Author(s):  
M. Grant Norton ◽  
C. Barry Carter
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Laser Ablation ◽  
Substrate Surface ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Laser Ablation Process ◽  
Deposition Parameters

Pulsed-laser ablation has been widely used to produce high-quality thin films of YBa2Cu3O7-δ on a range of substrate materials. The nonequilibrium nature of the process allows congruent deposition of oxides with complex stoichiometrics. In the high power density regime produced by the UV excimer lasers the ablated species includes a mixture of neutral atoms, molecules and ions. All these species play an important role in thin-film deposition. However, changes in the deposition parameters have been shown to affect the microstructure of thin YBa2Cu3O7-δ films. The formation of metastable configurations is possible because at the low substrate temperatures used, only shortrange rearrangement on the substrate surface can occur. The parameters associated directly with the laser ablation process, those determining the nature of the process, e g. thermal or nonthermal volatilization, have been classified as ‘primary parameters'. Other parameters may also affect the microstructure of the thin film. In this paper, the effects of these ‘secondary parameters' on the microstructure of YBa2Cu3O7-δ films will be discussed. Examples of 'secondary parameters' include the substrate temperature and the oxygen partial pressure during deposition.

153: Successful Gold Nanoshell Assisted Laser Ablation of Prostate Carcinoma in Vitro

2007 ◽  
Vol 177 (4S) ◽  
pp. 52-52
Author(s):  
Joshua M. Stem ◽  
Jer-Tsang Hsieh ◽  
Sangtae Park ◽  
Yair Lotan ◽  
Jeffrey A. Cadeddu
Keyword(s):  
Laser Ablation ◽  
Prostate Carcinoma ◽  
Gold Nanoshell
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