Long-term wettability of titanium surfaces by combined femtosecond laser micro/nano structuring and chemical treatments

Jinlong Lu, Ting Huang, Zhu Liu, Xin Zhang, Rongshi Xiao

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Two types of titanium surfaces covering with TiO 2 micro/nanostructures were fabricated by femtosecond laser structuring followed by NaOH hydrothermal or H 2 O 2 oxidation treatments. After exposure to air, the former surface maintained hydrophilic for 10 days and had a minimum contact angle less than 20° even after 50 days, while the latter surface changed to superhydrophobic with a contact angle more than 150° after 50 days. Detailed analysis in terms of morphology, phase transformation and surface chemistry indicated that the changes of wettability behavior were associated with the adsorption of organic compounds from the surrounding atmosphere. The surface prepared by laser and H 2 O 2 oxidation not only had a stronger adsorption ability than the surface prepared by laser and NaOH treatment, but also exhibited a relative higher hydrophobic hydrocarbon tail in the absorbed compounds, which resulted different wettability evolution trend for the two types of titanium surfaces.

Original languageEnglish
Pages (from-to)257-262
Number of pages6
JournalApplied Surface Science
Volume459
DOIs
Publication statusPublished - 2018 Nov 30
Externally publishedYes

Keywords

  • Chemical treatment
  • Femtosecond laser
  • TiO
  • Wettability

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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