Core–satellite assemblies of Au@polydopamine@Ag nanoparticles for photothermal-mediated catalytic reaction

Abstract

Engineering plasmonic nanoparticles (NPs) into superstructures comprising two or more distinctive materials is highly desirable because these assemblies can unfold new properties that differ from those exhibited by their individual...

Photothermal-Mediated Catalytic Reduction of 4-Nitrophenol Using Poly(N-isopropylacrylamide-acrylamide) and Hollow Gold Nanoparticles

“…In this study, a core-satellite structure was prepared, rather than a core–shell structure, to enhance the photothermal-mediated catalytic performance of as-made materials with different interdistance between satellite particles (HAuNPs) by the LSPR-coupling effect. In our previous study, gold-spiked silica microrods based on Escherichia coli, which has a core-satellite structure, were prepared and used for photothermal therapy. , The core-satellite structure not only improved the photothermal performance but also allowed the adjustment of the interval between satellite particles . Because of thermoresponsive properties as the LCST-polymer, the core contracted and thus the distance between the satellite particles on the core was changed with increasing temperature.…”

“…In our previous study, gold-spiked silica microrods based on Escherichia coli, which has a coresatellite structure, were prepared and used for photothermal therapy. 9,10 The core-satellite structure not only improved the photothermal performance 8 but also allowed the adjustment of the interval between satellite particles. 15 Because of thermoresponsive properties as the LCST-polymer, the core contracted and thus the distance between the satellite particles on the core was changed with increasing temperature.…”

“…Metal nanoparticles (NPs), especially gold NPs (AuNPs), have received significant attention for driving chemical reactions owing to their excellent light absorption properties . This distinctive feature of AuNPs is their localized surface plasmon resonance (LSPR), which is induced by collective excitations of the free electrons in the AuNPs with light irradiation .…”

“…2−7 Metal nanoparticles (NPs), especially gold NPs (AuNPs), have received significant attention for driving chemical reactions owing to their excellent light absorption properties. 8 This distinctive feature of AuNPs is their localized surface plasmon resonance (LSPR), which is induced by collective excitations of the free electrons in the AuNPs with light irradiation. 9 In addition, LSPR-mediated photothermal heating under near-infrared (NIR) irradiation, which is a non-radiative property of AuNPs, has shown potential for photothermal therapy and for the enhancement of chemical reactions.…”

SiO2 Coated Up-Conversion Nanomaterial Doped with Ag Nanoparticles for Micro-CT Imaging

“…Combined with its biocompatibility, Ag-UCNPs@SiO 2 can be considered as photothermal therapy reagent. The reason for this phenomenon is that silver will generate heat when irradiated by 540 nm laser [24], while rare earth up-conversion nano materials excited by 980 nm near-infrared light will emit 540 nm fluorescence (Figure 6). Secondly, the doping of silver nanoparticles will enhance the energy of 540 nm wavelength (Figure 7).…”