title: All-oxide Raman-active traps for light and matter: probing redox homeostasis model reactions in aqueous environment.
abstract: Core-shell colloidal crystals can act as very efficient traps for light and analytes. Here it is shown that Raman-active probes can be achieved using SiO2-TiO2 core-shell beads. These systems are successfully tested in monitoring of glutathione redox cycle at physiological concentration in aqueous environment, without need of any interfering enhancers. These materials represent a promising alternative to conventional, metal-based SERS probes for investigating chemical and biochemical reactions under real working conditions.
authors: INSTM and Chemistry for Technologies Lab, University of Brescia, via Branze 38, 25123, Brescia, ITALY.
authors: Ivano
authors: I
authors: Alessandri
authors: L E
authors: LE
authors: Depero
mesh_terms: D003102:Colloids / Q000737:chemistry; D003460:Crystallization; D005978:Glutathione / Q000737:chemistry; D006706:Homeostasis / Q000528:radiation effects*; D006861:Hydrogen Peroxide / Q000737:chemistry; D008027:Light; D010084:Oxidation-Reduction / Q000528:radiation effects; D010087:Oxides / Q000737:chemistry*; D011208:Powders; D012996:Solutions; D013059:Spectrum Analysis, Raman; D014867:Water / Q000737:chemistry*
chemical_list: D003102:Colloids; D010087:Oxides; D011208:Powders; D012996:Solutions; D014867:Water; D006861:Hydrogen Peroxide; D005978:Glutathione
keywords: (metal-free) SERS; core-shell materials; glutathione