The design of magneto-plasmonic nanostructures formed by magnetic Prussian Blue-type nanocrystals decorated with Au nanoparticles

Abstract

A general protocol is presented to prepare hybrid magneto-plasmonic Au-PBA nanostructures formed by PBA decorated by different Au nanoparticles.

Magnetic–Plasmonic Multimodular Hollow Nanoreactors for Compartmentalized Orthogonal Tandem Catalysis

“…This design challenge requires the integration of optimal molecular diffusion to and from active sites as well as switching the selected step “on” and “off” in situ by a benign and site-selective energy flow, tightly controlling different products while suppressing side reactions. − Such a compartmentalized energy supply can facilitate the arbitrary integration of steps from a diverse pool of catalytic reactions, facilitating a one-pot total synthesis irrespective of the thermodynamic compatibility. In addition, while they avoid the nonspecific heating of the bulk reaction, these systems would be adoptable for specific applications involving heat-sensitive media such as in locally synthesizing desired molecular probes or therapeutic molecules in a delicate bioenvironment, functioning on-demand with in-built stimuli-responsive plugins. − Unfortunately, commonly synthesized hybrid magnetic–plasmonic nanostructures such as core–shells, yolk shells, and heterodimers are unsuitable for these purpose-directed applications, in which the independent but synchronous operation of magnetic and plasmonic components is required. − In this study, we propose a suitable multimodular catalytic platform comprising nanocompartmentalized antennae-reactor components that can efficiently receive and supply hyperlocal energy to a specific reaction site without an interconflicting mechanism. To achieve this, we integrated “plasmonic–catalytic” and “magnetic–catalytic” components in an isolated but tethered configuration that independently recruits near-infrared light (NIR) and an alternating magnetic field (AMF), respectively, as selective excitation modules on the distinct energy spectrum.…”

Nanoheterostructures based on nanosized Prussian blue and its Analogues: Design, properties and applications

“…These Au nano-objects were covalently attached to the PBA surface through the thiol-polyethyleneglycol-amine (HS-PEG-NH2) ligand (Figure 11). [199] The nanoheterostructures exhibited both, magnetic properties of PBA and the SPR phenomenon, which depends on the shape of the corresponding Au nano-satellites. Two other works have been devoted to the coverage of PB(A) nanoparticles with spherical Au nanoparticles with the help of electrostatic interactions.…”

“…Note, however, that in these latter cases, there is no direct interface between two inorganic components because PB(A)s nanoparticles are enwrapped by an important amount of stabilizing agent. [201], [202], [199] . TEM images of Ni II Cr III -PBA@Au core@satellites nanoheterostructures with spherical (a), nano-rods (c) and nanostars (e) Au satellites and their corresponding electronic spectra showing the plasmon band.…”

Enhancing the Electrocatalytic Activity and Stability of Prussian Blue Analogues Through the Introduction of Au Nanoparticles in a Core@shell Heterostructure

“…To verify the influence of Au on the electrochemical performance and the benefits of this sort of core@shell heterostructure, four kinds of NPs were also prepared: i) PBA NPs (NiFe III and CoFe III ) containing many defects (i.e. many vacancies) since they give rise to higher electrocatalytic performance, [38] ii) PBA with reduced Fe II (NiFe II and CoFe II ) iii) PBA NPs decorated with Au NPs on its surface (Au-PBA) [39] and PBA NPs physically mixed with Au NPs (Au+PBA). TEM images of these systems and their respective histograms can be found in Figures S6-S9.…”

“…The decoration of Au on PBA NPs was carried out by connecting each NP by a polymer containing a thiol and an amine group(HS-PEG-NH2) following a protocol developed in our group. [39] Electrode preparation…”