Photo‐Responsive TiO2‐Gold Nanoparticle‐Polymer Nanohybrid Exhibits Photothermal, Thermo‐Release, and Photocatalytic Effects

Author:

Consoli Grazia M. L.1,Forte Giuseppe2,Maugeri Ludovica2,Petralia Salvatore123ORCID

Affiliation:

1. CNR-Institute of Biomolecular Chemistry Via Paolo Gaifami 18 95126 Catania Italy

2. Department of Drug and Health Sciences University of Catania Via Santa Sofia 64 95125 Catania Italy

3. CIB-Interuniversity Consortium for Biotechnologies U.O. of Catania Via Flavia, 23/1 34148 Trieste Italy

Abstract

AbstractThe development of multi‐responsive nanohybrid systems that combine photothermia, thermo‐responsive effects and photocatalysis is a challenging topic in the research of multifunctional materials with a large field of applications. Here, we report the first example of a three‐components light‐responsive nanosystem consisting of titania, gold nanoparticles and poly‐N‐isopropylacrylamide (TiO2‐Au‐PNM). The hybrid nanostructure exhibited photothermal conversion effect upon green‐light excitation and capacity to entrap methylene blue and curcumin selected as cargo models. The formation of the nanohybrid–cargo adducts, the photothermal‐controlled cargo release triggered by green‐light irradiation (532 nm) and mediated by lower critical solution temperature (LCST), as well as the photocatalytic effect prompted by UV‐light excitation (300 nm) were demonstrated by spectroscopic techniques. The mechanism involved in the interaction of the polymeric component with the cargos was investigated by molecular modelling calculations.

Funder

Ministero dell'Università e della Ricerca

Publisher

Wiley

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