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

Published online by Cambridge University Press:  11 June 2018

Danilo Vona ,
Stefania Roberta Cicco ,
Roberta Ragni ,
Gabriella Leone ,
Marco Lo Presti  and
Gianluca Maria Farinola
Danilo Vona
Affiliation:
Università degli Studi di Bari «Aldo Moro», Via Orabona 4, 70126 Bari, Italy
Stefania Roberta Cicco
Affiliation:
CNR-ICCOM – Bari, Via Orabona 4, 70126 Bari, Italy
Roberta Ragni
Affiliation:
Università degli Studi di Bari «Aldo Moro», Via Orabona 4, 70126 Bari, Italy
Gabriella Leone
Affiliation:
Università degli Studi di Bari «Aldo Moro», Via Orabona 4, 70126 Bari, Italy IIT-Center for Nano Science and Technology, Via Giovanni Pascoli, 70, 20133 Milano, Italy
Marco Lo Presti
Affiliation:
Università degli Studi di Bari «Aldo Moro», Via Orabona 4, 70126 Bari, Italy
Gianluca Maria Farinola*
Affiliation:
Università degli Studi di Bari «Aldo Moro», Via Orabona 4, 70126 Bari, Italy
*
Address all correspondence to Gianluca Maria Farinola at [email protected]
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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.

Type
Research Letters
Information
MRS Communications , Volume 8 , Issue 3 , September 2018 , pp. 911 - 917
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Copyright
Copyright © Materials Research Society 2018 

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