Multifunctional Magnetic Silver Nanoshells with Sandwichlike Nanostructures

Abstract

We present a novel multifunctional magnetic Ag nanoshell with sandwichlike nanostructure, which is composed of a yolk−egg-like magnetic silica core and a continuous Ag nanoshell coating. First, yolk−egg-like magnetic silica was prepared by a facile one-step sol−gel method to embed the magnetic nanoparticles at the boundary between inner silica spherical core and outer silica shell. Then Ag nanoshells were coated by electroless plating method, forming a multiplayer sandwichlike nanostructure. The plasmon resonance peaks can shift across a wide wavelength range by tuning the Ag shell coverage and thickness. The magnetic Ag nanoshells fuse the broad NIR absorption property and superparamagnetic property into one particle, possessing promising biomedical applications such as magnetic-field targeted photothermal therapy agents and multimodal molecular probes.

Hollow Micro/Nanomaterials with Multilevel Interior Structures

“…[27] The core-in-hollow-shell spheres, however, are of a void intermediate layer. A good number of scientists paid great attention to this interesting structure and denoted them some pictographic names such as the rattle-type [90][91][92][93] structure or yolk-shell [94][95][96] structure. To express this more concisely, we have also referred to the core-inhollow-shell structures as rattle-structures hereinafter.…”

Bi2WO6@carbon/Fe3O4 microspheres: Preparation, growth mechanism and application in water treatment

“…Complex nanostructures have attracted much attention because of their multifunction or even new applications originated from multicomponents [1][2][3][4][5][6]. Among them, iron oxides based nanostructures have been extensively studied due to their special magnetic properties.…”

Multifunctional Nanoparticles for Multimodal Molecular Imaging

“…Recently, multifunctional magnetic SiO 2 @Ag sandwichlike nanostructures were reported; they are is composed of a magnetic silica core and a continuous Ag shell. The magnetic Ag shells integrated the broad NIR absorption property and superparamagnetic property into one particle, providing promising multimodal probes and magnetic-field targeted photothermal therapy agents [28], as shown in Figure 21.3. MCM-41 type materials, which possess a hexagonal array of one-dimensional channels with diameters of 2-10 nm [29], have been introduced into biomedicine in recent years.…”