A Nanoindentation Approach for Time-Dependent Evaluation of Surface Free Energy in Micro- and Nano-Structured Titanium

Materials

Simona Sennato¹  Serena De Santis²  Monica Orsini²  Edoardo Bemporad³  Marco Sebastiani³  Edoardo Rossi³ 

[1] CNR-ISC Sede Sapienza, Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy;Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy;Engineering Department, Università Degli Studi Roma Tre, Via Della Vasca Navale 79, 00146 Rome, Italy;

关键词: titanium;    surface free energy;    nanoindentation;    chemical treatment;    aging;   

DOI  :  10.3390/ma15010287

来源: DOAJ

【 摘 要 】

Surface free energy (SFE) of titanium surfaces plays a significant role in tissue engineering, as it affects the effectiveness and long-term stability of both active coatings and functionalization and the establishment of strong bonds to the newly growing bone. A new contact–mechanics methodology based on high-resolution non-destructive elastic contacting nanoindentation is applied here to study SFE of micro- and nano-structured titanium surfaces, right after their preparation and as a function of exposure to air. The effectiveness of different surface treatments in enhancing SFE is assessed. A time-dependent decay of SFE within a few hours is observed, with kinetics related to the sample preparation. The fast, non-destructive method adopted allowed for SFE measurements in very hydrophilic conditions, establishing a reliable comparison between surfaces with different properties.

【 授权许可】

Unknown