Fabrication of random microspikes on mold metal by ultrashort laser ablation for hydrophilic surface

Jiwhan Noh, Jae Hoon Lee, Sangyup Lee, Suckjoo Na

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Microsized spikes, which are smaller than laser focused spots, were fabricated by laser ablation in this study. The hydrophilic property of the surface with the microsize spikes was tested. Microspikes of 20 μm size were formed using a 50 μm laser focused spot size by optimizing the laser process parameters. Water drops were placed on the microspikes to measure the contact angle, which was 10° while that of the surface without microspikes was 80°. This shows that a surface can be processed to be hydrophilic with laser ablation, without applying hydrophilic chemical coating. Because the base material in this study was a mold metal, injection molding products with functional surfaces were produced economically by forming micropatterns on their surfaces. The economically micropatterns produced in this study will be applicable for controlling the friction of fluids on surfaces, as well as for producing hydrophilic surfaces.

Original languageEnglish
Pages (from-to)1065031-1065037
Number of pages7
JournalJapanese Journal of Applied Physics
Volume49
Issue number10
DOIs
Publication statusPublished - 2010 Oct 1

Fingerprint

Laser ablation
laser ablation
Fabrication
fabrication
Metals
metals
spikes
Lasers
lasers
injection molding
Injection molding
Contact angle
friction
Friction
coatings
Coatings
Fluids
fluids
products
water

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "Microsized spikes, which are smaller than laser focused spots, were fabricated by laser ablation in this study. The hydrophilic property of the surface with the microsize spikes was tested. Microspikes of 20 μm size were formed using a 50 μm laser focused spot size by optimizing the laser process parameters. Water drops were placed on the microspikes to measure the contact angle, which was 10° while that of the surface without microspikes was 80°. This shows that a surface can be processed to be hydrophilic with laser ablation, without applying hydrophilic chemical coating. Because the base material in this study was a mold metal, injection molding products with functional surfaces were produced economically by forming micropatterns on their surfaces. The economically micropatterns produced in this study will be applicable for controlling the friction of fluids on surfaces, as well as for producing hydrophilic surfaces.",
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Fabrication of random microspikes on mold metal by ultrashort laser ablation for hydrophilic surface. / Noh, Jiwhan; Lee, Jae Hoon; Lee, Sangyup; Na, Suckjoo.

In: Japanese Journal of Applied Physics, Vol. 49, No. 10, 01.10.2010, p. 1065031-1065037.

Research output: Contribution to journalArticle

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