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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

3-Mercaptopropionic acid functionalization of titanium dioxide thin films

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Gomes, Orisson P. [1, 2] ; Azevedo Neto, Nilton F. [1] ; Bronze-Uhle, Erika S. [1, 2] ; Trino, Luciana D. [1, 2] ; dos Santos, Cassio M. [1, 2] ; da Silva, Jose H. D. [1] ; Lisboa-Filho, Paulo N. [1, 2]
Total Authors: 7
[1] Univ Estadual Paulista, UNESP, Dept Fis, Av Engn Luiz Edmundo Carrijo Coube 14-01, BR-17033360 Bauru, SP - Brazil
[2] Inst Biomat Tribocorros & Nanomed, Brazilian Branch, Bauru, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Materials Chemistry and Physics; v. 223, p. 32-38, FEB 1 2019.
Web of Science Citations: 0

Nanostructured titanium dioxide (TiO2) films are commonly employed as surface modifiers on medical and dental metallic implants, presenting promising results related to interactions with living tissues, promoting improvements in the in vivo biocorrosion resistance and increased bioactivity when compared to non-coated metallic materials. In addition to these properties, titanium dioxide is also well recognized for its biocompatibility. However, considering the necessary integration with surrounding tissues when this oxide is applied as implant coatings, there are many aspects of the adhesion mechanisms located at the interface between the biological environment and the oxide surface that still need to be addressed. Specifically regarding the surface chemistry, these oxides are mainly terminated by hydroxyl groups (-OH) that are readily functionalized by different molecules, such as the 3-mercaptopropionic acid (MPA). In this contribution, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) were used to examine the adsorption of MPA on anatase-and rutile-phase forms of TiO2 thin film surfaces grown by RF magnetron sputtering. According to the obtained results, both anatase and rutile TiO2 films present similarities in roughness and thickness. However, different responses to interaction with the MPA molecules were observed, wherein the functionalization was seen to occur only for the rutile phase. (AU)

FAPESP's process: 16/22186-7 - Protein Interaction in TiO2 Thin Films Surfaces
Grantee:Orisson Ponce Gomes
Support type: Scholarships in Brazil - Master
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 14/20471-0 - Functionalized metal oxides thin films for the study of protein adsorption
Grantee:Paulo Noronha Lisboa Filho
Support type: Regular Research Grants