TY - JOUR
T1 - Long-term wettability of titanium surfaces by combined femtosecond laser micro/nano structuring and chemical treatments
AU - Lu, Jinlong
AU - Huang, Ting
AU - Liu, Zhu
AU - Zhang, Xin
AU - Xiao, Rongshi
N1 - Funding Information:
The authors acknowledge the support from the National Natural Science Foundation of China (No. 51675013 ).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/11/30
Y1 - 2018/11/30
N2 - 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.
AB - 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.
KW - Chemical treatment
KW - Femtosecond laser
KW - TiO
KW - Wettability
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U2 - 10.1016/j.apsusc.2018.08.004
DO - 10.1016/j.apsusc.2018.08.004
M3 - Article
AN - SCOPUS:85050957516
VL - 459
SP - 257
EP - 262
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -