Highly efficient antimicrobial ceramics based on electrically charged interfaces

Julián Jiménez Reinosa, Miguel Muñoz Rojo, Adolfo del Campo, Marisol Martin Gonzalez, José Francisco Fernández*

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    63 Downloads (Pure)

    Abstract

    The increasing threat of multidrug-resistant microorganisms is a cause for worldwide concern. This motivates a necessity to discover new antimicrobial agents or new mechanisms for microorganism eradication, different from those currently used. Here, we report an effective antibacterial ceramic glaze that combines different bactericide mechanisms. Specifically, the used methodology of the glaze results in glass-free edge crystallizations of feldspar structures at the ceramic surface. A combination of Rutherford Backscattering Spectroscopy (RBS), Scanning Electron Microscopy (SEM) and Raman Microscopy is used in order to determine the chemical elements and crystallizations at the ceramic surface. Moreover, Kelvin Probe Force Microscopy (KPFM) demonstrates that the presence of glass-free edges in feldspar crystals (semiconductor phase) on a glass matrix (insulator phase) promotes the formation of Semiconductor-Insulator Interface barriers. These barriers act as reservoirs of electric charge producing a discharge exceeding the microorganism membrane breakdown value. Furthermore, the surface crystallizations account for the formation of a micro-roughness that limits biofilm formation. Both factors result in high antibacterial activity in the range of R > 4 for E. Coli and E. Aureus. This approach opens new possibilities to attain bactericidal surfaces and to understand the role of physical interaction as a main antimicrobial mechanism
    Original languageEnglish
    Pages (from-to)39254-39262
    JournalACS applied materials & interfaces
    Volume11
    Issue number42
    DOIs
    Publication statusPublished - 27 Sep 2019

    Keywords

    • UT-Hybrid-D
    • antimicrobial properties
    • feldspar crystallizations
    • surface charge
    • physical mechanisms
    • Ceramic tile

    Fingerprint Dive into the research topics of 'Highly efficient antimicrobial ceramics based on electrically charged interfaces'. Together they form a unique fingerprint.

  • Cite this

    Jiménez Reinosa, J., Muñoz Rojo, M., del Campo, A., Martin Gonzalez, M., & Francisco Fernández, J. (2019). Highly efficient antimicrobial ceramics based on electrically charged interfaces. ACS applied materials & interfaces, 11(42), 39254-39262. https://doi.org/10.1021/acsami.9b10690