Micron gold cage shell structure material with broadband absorption characteristic and preparation method of micron gold cage shell structure material

Abstract

The invention belongs to the field of core-shell composite structure materials, and particularly relates to a micron gold cage shell structure material with a broadband absorption characteristic and apreparation method of the micron gold cage shell structure material. A monodisperse nanogold concentrated solution with a certain concentration is mixed with a PS@Au microsphere emulsion subjected tosurface modification, and nanogold particles are self-mounted on the surfaces of modified PS@Au microspheres through electrostatic interaction. According to the material and the preparation method, the surfaces of the PS@Au microspheres are coated with the foamed nanogold particles by virtue of a self-assembly technology, and finally, polystyrene microspheres in the centers are removed, so that anovel gold cage shell composite material with a core-shell structure is obtained. By means of the special structure, Plasma resonance absorption formed by the nanogold core shells prepared through aFrens surface growing method is achieved; MNPAu uniformly grows on the surface to form a photonic crystal resonance peak; and due to the strong coupling effect of the two peaks, the absorption of themicron gold cage shell structure material in an ultraviolet-infrared wave band is expanded into broadband absorption.

Description

technical field

[0001] The invention belongs to the field of core-shell composite structural materials, and more specifically relates to a micron gold cage shell structural material with broadband absorption characteristics and its preparation. Background technique

[0002] The core-shell composite structure is a kind of composite crystal, amorphous or polycrystalline phase structure formed by using spherical particles with a size of submicron as the core, and covering nano-sized particles with physical and chemical methods on the surface. The metal-insulator core-shell composite structure material has the composite characteristics of metal nanoparticles and insulating core. By adjusting parameters such as particle size and thickness, its mechanical, thermal and photoelectric properties can be manipulated. With the development of science and technology, the design and synthesis of monodisperse, smart and controllable core-shell composite structure materials is one of the ho...

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