Functionalization of titania nanotubes with electrophoretically deposited silver and calcium phosphate nanoparticles: Structure, composition and antibacterial assay

Roman V. Chernozem, Maria A. Surmeneva, Bärbel Krause, Tilo Baumbach, Viktor P. Ignatov, Oleg Prymak, Kateryna Loza, Matthias Epple, Franka Ennen-Roth, Alexandra Wittmar, Mathias Ulbricht, Ekaterina A. Chudinova, Tomaž Rijavec, Aleš Lapanje, Roman A. Surmenev

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Herein TiO2 nanotubes (NTs) were fabricated via electrochemical anodization and coated with silver and calcium phosphate (CaP) nanoparticles (NPs) by electrophoretic deposition. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) revealed that Ag and CaP NPs were successfully deposited onto the TiO2 NTs. Using X-ray diffraction, only anatase and Ti were observed after deposition of Ag and CaP NPs. However, X-ray photoelectron spectroscopy (XPS) analysis revealed that the binding energy (BE) of the Ag and CaP NP core levels corresponded to metallic Ag, hydroxyapatite and amorphous calcium phosphate, based on the knowledge that CaP NPs synthesized by precipitation have the nanocrystalline structure of hydroxyapatite. The application of Ag NPs allows for decreasing the water contact angle and thus increasing the surface free energy. It was concluded that the CaP NP surfaces are superhydrophilic. A significant antimicrobial effect was observed on the TiO2 NT surface after the application of Ag NPs and/or CaP NPs compared with that of the pure TiO2 NTs. Thus, fabrication of TiO2 NTs, Ag NPs and CaP NPs with PEI is promising for diverse biomedical applications, such as in constructing a biocompatible coating on the surface of Ti that includes an antimicrobial effect.

Original languageEnglish
Pages (from-to)420-430
Number of pages11
JournalMaterials Science and Engineering C
Volume97
DOIs
Publication statusPublished - 1 Apr 2019

Keywords

  • Antibacterial effect
  • Biocomposite
  • Calcium phosphate
  • Nanoparticles
  • Silver
  • Titania nanotubes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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