期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 37, 页码 20965-20971出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b06742
关键词
nanomaterial; nanoclay; photosensitizer; singlet oxygen; phthalocyanine; antibiotic resistant bacteria; photodynamic inactivation; phototherapy
资金
- Deutsche Forschungsgemeinschaft (DFG) [STR1186/1-1]
Herein, we present a straightforward strategy to disperse highly insoluble photosensitizers in aqueous environments, without major synthetic efforts and keeping their photosensitizing abilities unaffected. A layered nanoclay was employed to adsorb and to solubilize a highly efficient yet hydrophobic Si(IV) phthalocyaninate in water. The aggregation of the photoactive dye was correlated with its photophysical properties, particularly with the ability to produce highly cytotoxic singlet oxygen. Moreover, the resulting hybrid nanomaterial is able to selectively photoinactivate Gram-positive pathogens, due to local interactions between the bacterial membranes and the negatively charged nanodiscs. Nanotoxicity assays confirmed its innocuousness toward eukaryotic cells, showing that it constitutes a new class of phototriggered magic bullet for the inactivation of pathogens in phototherapy, as well as in the development of coatings for self-disinfecting surfaces.
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