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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.)

Zinc oxide surface functionalization and related effects on corrosion resistance of titanium implants

Full text
Author(s):
Trino, Luciana D. [1] ; Dias, Leonardo F. G. [1] ; Albano, Luiz G. S. [1] ; Bronze-Uhle, Erika S. [1] ; Rangel, Elidiane C. [2] ; Graeff, Carlos F. O. [1] ; Lisboa-Filho, Paulo N. [1]
Total Authors: 7
Affiliation:
[1] Sao Paulo State Univ Unesp, Sch Sci, BR-17033360 Bauru - Brazil
[2] Sao Paulo State Univ Unesp, Inst Sci & Technol, BR-18087180 Sorocaba - Brazil
Total Affiliations: 2
Document type: Journal article
Source: CERAMICS INTERNATIONAL; v. 44, n. 4, p. 4000-4008, MAR 2018.
Web of Science Citations: 13
Abstract

Important clinical concerns in orthopedics and dental implantology are associated with a significant release of titanium (Ti) metal ions and debris due to the low corrosion resistance of this material. Chemical modifications on Ti surfaces have been performed in order to minimize effects of corrosion. In this contribution, zinc oxide (ZnO) thin films were deposited onto Ti surfaces and functionalized with four different organic bifunctional molecules in order to increase the corrosion resistance. SEM and XPS indicated the formation of nanostructured ZnO thin film with hydroxyl groups available for covalent functionalization. The adhesion mechanism analyzed by XPS suggest that the attachment on ZnO occurs by carboxylic acid, silane, thiol and hydroxyl groups for 4-aminophenylpropionic acid (APPA), 3-aminopropyltrimetoxysilane (APTMS), 3-mercaptopropionic acid (MPA), and polyethylene glycol (PEG) molecules. Electrochemical analysis for the functionalized ZnO specimens with APPA showed noble open circuit potentials (-0.2 V) and significant decrease in the corrosion current density (5.3 x 10(-7) A/cm(2)) when compared to the values obtained for pristine Ti (-0.56 V and 2.3 x 10(-6) A/cm(2)), indicating a promising material for applications in biomedical fields. (AU)

FAPESP's process: 14/01713-3 - Functionalization and adsorption studies on thin oxide films
Grantee:Luciana Daniele Trino
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/09963-6 - Construction and characterization of vertical organic field effect transistors by using nanostructured materials as intermediate electrode
Grantee:Luíz Gustavo Simão Albano
Support type: Scholarships in Brazil - Doctorate (Direct)
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