Abstract
The aim of the study was to fabricate and extensively characterize a layer of carbon nanotubes deposited on the surface of titanium, in order to prove that, by selecting proper type of carbon nanotubes and altering different parameters of the electrophoretic deposition process, we are able to obtain products having a different influence on cells—either favouring or inhibiting their survival. In the study, a novel mixture of solvents was used to suspend as-received tubes and then applied in the electrophoretic deposition. High charging capability and high yield of the obtained deposits are promising results when considering up-scaling the process. The surface of the obtained multi-walled carbon nanotubes-coated titanium samples was characterized using SEM, AFM, XPS and Raman microspectroscopy. The carbon nanotube layer showed nanorough topography and was formed of randomly and loosely distributed tubes, and XPS study revealed that there was a significant amount of C–O bonds. These properties were found to be favourable to osteoblast survival, spreading and growth.
Highlights
Owing to their unique properties, such as extremely high mechanical properties [1], or good electrical and thermal conductivity [2], multi-walled carbon nanotubes (MWCNTs) are currently proposed to be applied in numerous fields of materials engineering, including biomedicine
The aim of the study was to fabricate and extensively characterize a layer of carbon nanotubes deposited on the surface of titanium, in order to prove that, by selecting proper type of carbon nanotubes and altering different parameters of the electrophoretic deposition process, we are able to obtain products having a different influence on cells—either favouring or inhibiting their survival
In vitro experiments were carried out using hFOB 1.19 cell line, obtained from ATCC (American Type Culture Collection)
Summary
Owing to their unique properties, such as extremely high mechanical properties [1], or good electrical and thermal conductivity [2], multi-walled carbon nanotubes (MWCNTs) are currently proposed to be applied in numerous fields of materials engineering, including biomedicine. Some applications require usage of a single, separated tube, most of them require forming a micro- or macro-assembly. This can be done either by incorporating the MWCNTs into a polymer matrix or by forming a free-standing film or layer on the substrate of choice. First approach is generally applied when CNTs are aimed to improve the properties of the matrix. An introduction of an additional component may hinder the CNTs–CNTs interactions, reducing come of their beneficial properties. Forming purely CNTs–CNTs network may offer the possibility of obtaining a micro- or macro-scale product without reducing the level of inter tube interactions
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