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    Université de Fribourg

    Metal nanoparticle–microbe interactions: synthesis and antimicrobial effects

    Khan, Mujeebur R. ; Fromm, Katharina M. ; Rizvi, Tanveer F. ; Giese, Bernd ; Ahamad, Faheem ; Turner, Raymond J. ; Füeg, Michael ; Marsili, Enrico

    In: Particle & Particle Systems Characterization, 2020, vol. 37, no. 5, p. 1900419

    Metal nanoparticles (NPs), chalcogenides, and carbon quantum dots can be easily synthesized from whole microorganisms (fungi and bacteria) and cell‐free sterile filtered spent medium. The particle size distribution and the biosynthesis time can be somewhat controlled through the biomass/metal solution ratio. The biosynthetic mechanism can be explained through the ion‐reduction theory and...

    Université de Fribourg

    Metal nanoparticle–microbe interactions: synthesis and antimicrobial effects

    Khan, Mujeebur R. ; Fromm, Katharina M. ; Rizvi, Tanveer F. ; Giese, Bernd ; Ahamad, Faheem ; Turner, Raymond J. ; Füeg, Michael ; Marsili, Enrico

    In: Particle & Particle Systems Characterization, 2020, vol. 37, no. 5, p. 1900419

    Metal nanoparticles (NPs), chalcogenides, and carbon quantum dots can be easily synthesized from whole microorganisms (fungi and bacteria) and cell‐free sterile filtered spent medium. The particle size distribution and the biosynthesis time can be somewhat controlled through the biomass/metal solution ratio. The biosynthetic mechanism can be explained through the ion‐reduction theory and...

    Université de Fribourg

    Formation of silver nanoparticles by electron transfer in peptides and c‐cytochromes

    Vasylevskyi, Serhii I. ; Kracht, Sonja ; Corcosa, Paula ; Fromm, Katharina M. ; Giese, Bernd ; Füeg, Michael

    In: Angewandte Chemie International Edition, 2017, vol. 56, no. 21, p. 5926-5930

    The reduction of Ag⁺ ions to Ag⁰ atoms is a highly endergonic reaction step, only the aggregation to Agn clusters leads to an exergonic process. These elementary chemical reactions play a decisive role if Ag nanoparticles (AgNPs) are generated by electron transfer (ET) reactions to Ag⁺ ions. We studied the formation of AgNPs in peptides by photoinduced ET, and in...