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Biosilica/polydopamine/silver nanoparticles composites: new hybrid multifunctional heterostructures obtained by chemical modification of Thalassiosira weissflogii silica shells

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Abstract

Biosilica from living diatom microalgae has recently attracted the interest of the scientific community and found several applications in bio-nanotechnology. Among silica-maker organisms, diatom microalgae represent the most attractive marine microorganisms, featuring highly hierarchical, nanotextured and porous silica walls. These biologic structures, known as “frustules” are also chemically addressable via simple chemical synthesis. In this work, we propose new diatom-based hybrid materials consisting of biosilica extracted from living Thalassiosira weissflogii coated with polydopamine (PDA) films. The adhesion properties of the PDA were exploited to decorate the silica surface with silver nanoparticles. These multifunctional heterostructures can be useful for applications ranging from bioelectronics to biomedicine.

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Acknowledgments

For the design of the experiments and some important advices about interpretation of the analyses data, we thank Dr. F. Palumbo (CNR NANOTECH) and Dr. E. Altamura (Universita degli Studi di Bari).

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Authors and Affiliations

  1. Università degli Studi di Bari „Aldo Moro”, Via Orabona 4, 70126, Bari, Italy

    Danilo Vona, Roberta Ragni, Gabriella Leone, Lo Presti Marco & Gianluca Maria Farinola

  2. CNR-ICCOM - Bari, Via Orabona 4, 70126, Bari, Italy

    Stefania Roberta Cicco

  3. IIT-Center for Nano Science and Technology, Via Giovanni Pascoli, 70, 20133, Milano, Italy

    Gabriella Leone

Authors
  1. Danilo Vona
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  2. Stefania Roberta Cicco
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  3. Roberta Ragni
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  4. Gabriella Leone
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  5. Lo Presti Marco
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  6. Gianluca Maria Farinola
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Corresponding author

Correspondence to Gianluca Maria Farinola.

Supplementary material

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The supplementary material for this article can be found at {rs|https://doi.org/10.1557/mrc.2018.103|url|}.

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Vona, D., Cicco, S.R., Ragni, R. et al. Biosilica/polydopamine/silver nanoparticles composites: new hybrid multifunctional heterostructures obtained by chemical modification of Thalassiosira weissflogii silica shells. MRS Communications 8, 911–917 (2018). https://doi.org/10.1557/mrc.2018.103

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  • DOI: https://doi.org/10.1557/mrc.2018.103

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