Preparation method of sea urchin-shaped hollow gold nanocaps with controllable surface morphology

Abstract

The invention discloses a preparation method of a sea urchin-shaped hollow gold nanocap with controllable pure surface morphology, which includes: roughening the surface of PS spheres, transferring the PS spheres to a PE film, and obtaining a surface containing the roughened PS spheres. PE film; put the PE film loaded with roughened PS spheres into the vacuum chamber of the ion sputtering instrument to obtain the PE film loaded with gold nanocaps / roughened PS spheres; put the PE film loaded with gold nanocaps / roughened PS Ball array PE film into CH 2 Cl 2 solution, until the PS spheres are completely covered by CH 2 Cl 2 After dissolving, the PE film was taken out and ultrasonically cleaned in an ultrasonic machine to obtain pure sea urchin-shaped gold nanocaps. Using reactive ion etching to roughen the PS ball as a mask and ion sputtering a layer of gold film on its surface to obtain pure sea urchin-shaped hollow gold nanocaps with adjustable size and controllable surface morphology.

Description

technical field [0001] The invention relates to the preparation of a sea urchin-shaped hollow gold nano cap, in particular to a preparation method of a sea urchin-shaped hollow gold nano cap with controllable pure surface morphology. Background technique [0002] Generally speaking, roughened noble metal gold micro-nanostructures have good SERS performance, so many researchers have studied them and prepared gold micro-nanostructures with various shapes, such as gold nanorods, nanoflowers, Nano tip, nano ball and nano polyhedron etc. In order to obtain these micro-nano structures, researchers generally use the "hydrothermal method" to obtain micro-nano structures with controllable morphology, but the conditions of the above-mentioned methods are relatively harsh, and usually involve two or more chemical substances participating in the reaction , this scheme often introduces other impurities, making the final sample impure. Generally speaking, for the preparation of gold nan...

AI Technical Summary

Problems solved by technology

Generally speaking, for the preparation of gold nanocaps, PS spheres or silicon spheres are often used as masks, and then sputtering or electrodepositing a layer of gold film to obtain gold nanocaps, but directly using PS spheres or silicon spheres as masks The size of the final gold nanocaps is often limited to the intrinsic size of the PS sphere, and the surface morphology of the gold nanocaps cannot be adjusted too much.

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