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Electronic Properties of TiO2 Nanoparticles Films and the Effect on Apatite-Forming Ability
Joint Authors
Ahlberg, Elisabet
Mattisson, Ingela
Löberg, Johanna
Perez Holmberg, Jenny
Arvidsson, Anna
Source
International Journal of Dentistry
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-05-12
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
Nanoparticle-covered electrodes have altered properties as compared to conventional electrodes with same chemical composition.
The changes originate from the large surface area and enhanced conduction.
To test the mineralization capacity of such materials, TiO2 nanoparticles were deposited on titanium and gold substrates.
The electrochemical properties were investigated using cyclic voltammetry and impedance spectroscopy while the mineralization was tested by immersion in simulated body fluid.
Two types of nucleation and growth behaviours were observed.
For smooth nanoparticle surfaces, the initial nucleation is fast with the formation of few small nuclei of hydroxyapatite.
With time, an amorphous 2D film develops with a Ca/P ratio close to 1.5.
For the rougher surfaces, the nucleation is delayed but once it starts, thick layers are formed.
Also the electronic properties of the oxides were shown to be important.
Both density of states (DOS) in the bandgap of TiO2 and the active area were determined.
The maximum in DOS was found to correlate with the donor density (Nd) and the active surface area.
The results clearly show that a rough surface with high conductivity is beneficial for formation of thick apatite layers, while the nanoparticle covered electrodes show early nucleation but limited apatite formation.
American Psychological Association (APA)
Löberg, Johanna& Perez Holmberg, Jenny& Mattisson, Ingela& Arvidsson, Anna& Ahlberg, Elisabet. 2013. Electronic Properties of TiO2 Nanoparticles Films and the Effect on Apatite-Forming Ability. International Journal of Dentistry،Vol. 2013, no. 2013, pp.1-14.
https://search.emarefa.net/detail/BIM-448885
Modern Language Association (MLA)
Löberg, Johanna…[et al.]. Electronic Properties of TiO2 Nanoparticles Films and the Effect on Apatite-Forming Ability. International Journal of Dentistry No. 2013 (2013), pp.1-14.
https://search.emarefa.net/detail/BIM-448885
American Medical Association (AMA)
Löberg, Johanna& Perez Holmberg, Jenny& Mattisson, Ingela& Arvidsson, Anna& Ahlberg, Elisabet. Electronic Properties of TiO2 Nanoparticles Films and the Effect on Apatite-Forming Ability. International Journal of Dentistry. 2013. Vol. 2013, no. 2013, pp.1-14.
https://search.emarefa.net/detail/BIM-448885
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-448885