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01.11.2013 | Research Paper

Mixing thiols on the surface of silver nanoparticles: preserving antibacterial properties while introducing SERS activity

verfasst von: Angelo Taglietti, Yuri A. Diaz Fernandez, Pietro Galinetto, Pietro Grisoli, Chiara Milanese, Piersandro Pallavicini

Erschienen in: Journal of Nanoparticle Research | Ausgabe 11/2013

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Abstract

Controlling the surface composition of self-assembled monolayers is one of the major experimental challenges in nanotechnology. Despite the significant interest of the scientific community and the considerable number of publications related to this topic, the potential in this field is still far from being fully exploited.We present in this study a versatile method to coat silver nanoparticles (AgNPs) having average diameter of 7 nm with mixed monolayers of two thiols, achieving a precise control of surface composition. Different combinations of thiols have been investigated, and the nanomaterials obtained have been characterized by complementary experimental techniques, addressing the composition of the mixed monolayer. The surface-enhanced Raman spectroscopy (SERS) effect on a Raman reporter (7-mercapto-4-methylcoumarine) introduced into the mixed monolayers has also been investigated. The antibacterial activity of the coated AgNPs was investigated, showing that the colloids were active against Escherichia coli and Staphilococcus aureus irrespective of the nature of the mixed monolayer. These materials are good candidates as SERS-tags for biological applications.

Vorheriger Artikel High yield of graphene by dispersant-free liquid exfoliation of mechanochemically delaminated graphite

Nächster Artikel Multicolor photochromism of silver-containing mesoporous films of amorphous or anatase TiO2

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Titel: Mixing thiols on the surface of silver nanoparticles: preserving antibacterial properties while introducing SERS activity
verfasst von: Angelo Taglietti
Yuri A. Diaz Fernandez
Pietro Galinetto
Pietro Grisoli
Chiara Milanese
Piersandro Pallavicini
Publikationsdatum: 01.11.2013
Verlag: Springer Netherlands
Erschienen in: Journal of Nanoparticle Research / Ausgabe 11/2013
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-013-2047-x

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