Self-assembled monolayers of gold nanostars: a convenient tool for near-IR photothermal biofilm eradication

Piersandro Pallavicini; Alice Donà; Angelo Taglietti; Paolo Minzioni; Maddalena Patrini; Giacomo Dacarro; Giuseppe Chirico; Laura Sironi; Nora Bloise; Livia Visai; Leonardo Scarabelli

doi:10.1039/C3CC48667B

Self-assembled monolayers of gold nanostars: a convenient tool for near-IR photothermal biofilm eradication†

Piersandro Pallavicini,*^a Alice Donà,^a Angelo Taglietti,^a Paolo Minzioni,^b Maddalena Patrini,^c Giacomo Dacarro,^c Giuseppe Chirico,^d Laura Sironi,^d Nora Bloise,^e Livia Visai^eg and Leonardo Scarabelli^f

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^a inLAB, Department of Chemistry, University of Pavia, v.le Taramelli 12, 27100 Pavia, Italy
E-mail: piersandro.pallavicini@unipv.it
Fax: +39 382528544
Tel: +39 382987336

^b Department of Electrical, Computer, and Biomedical Engineering, and CNISM, University of Pavia, v. A. Ferrata, 5A, 27100 Pavia, Italy

^c Department of Physics, University of Pavia, v. Bassi, 6, 27100 Pavia, Italy

^d Department of Physics “G. Occhialini”, University of Milano Bicocca, Piazza della Scienza 3, 20126 Milano, Italy

^e Department of Molecular Medicine, Center for Tissue Engineering (C.I.T.), INSTM UdR of Pavia, University of Pavia, 27100 Pavia, Italy

^f CIC biomaGUNE, Center for Cooperative Research in Biomaterials, Paseo de Miramón 182, 20009 Donostia-San Sebastián, Spain

^g Department of Occupational Medicine, Ergonomy and Disability, Lab. Nanotechnology, Salvatore Maugeri Foundation, IRCCS, 27100 Pavia, Italy

Abstract

Monolayers of gold nanostars (GNS) are grafted on mercaptopropyltrimethoxysilane-coated glass slides. In the formed monolayers the localized surface plasmon resonance of GNS can be tuned in the 700–1100 nm range. Upon laser excitation of the nearIR LSPR an efficient photothermal response is observed, inducing local hyperthermia and efficient killing of Staphylococcus aureus biofilms.

Chemical Communications

Self-assembled monolayers of gold nanostars: a convenient tool for near-IR photothermal biofilm eradication†

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Self-assembled monolayers of gold nanostars: a convenient tool for near-IR photothermal biofilm eradication

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