Gold phosphide nanosheets as well as controllable preparation method and application thereof

Abstract

The invention discloses gold phosphide nanosheets as well as a controllable preparation method and application thereof. The preparation method comprises the following steps: putting a phosphorus source serving as a phosphorus-containing precursor and a mineralizer into a first region of a reaction chamber; arranging substrates provided with gold films in a stacked mode and placing the substrates in a second area of the reaction chamber, with the working temperature of the first area being 10-100 DEG C higher than that of the second area; and heating the reaction chamber to gasify the phosphorus source and the mineralizer to generate phosphorus-containing gas, evaporating gold on the surface of the substrates and forming nucleation points on the substrates, cooling, and reacting the phosphorus-containing gas with the gold under the induction of the nucleation points to epitaxially grow to form the gold phosphide nanosheets. The chemical vapor transport method adopted by the invention issimple and safe to operate, high in controllability and strong in repeatability, and the prepared gold phosphide nanosheets have the advantages of high yield, high purity, low surface roughness, uniform thickness, controllable morphology and the like, and can be widely applied to the fields of catalysis, semiconductor devices and the like.

Description

technical field [0001] The invention relates to a gold phosphide nanosheet and a controllable preparation method and application thereof, belonging to the technical field of nanomaterials and nanosemiconductors. Background technique [0002] Transition metal phosphides have a wide range of applications in the fields of electronics, semiconductors, catalysts, hydrogen storage, lithium batteries, and magnetic devices. It is formed by the interstitial filling of non-metal element phosphorus with large atomic radius in the metal atomic lattice. Because of its special structure, it has properties that other compounds do not have. Within this broad and diverse group of materials, gold phosphide (Au 2 P 3 ) is still in its infancy because of its unique optical and electronic properties. Au 2 P 3 The most extensive research is on the ohmic contact between InP (indium phosphide, a semiconductor material) and Au electrodes. When depositing Au electrodes on InP, the contact resis...

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Problems solved by technology

[0006] 1. The samples prepared by the direct synthesis method contain impurities and pollutants, and only blocks with uncontrollable morphology can be synthesized;

[0007] 2. The solution method is complicated to operate and can only synthesize nanoparticles with uncontrollable purity, shape or size;

[0008] 3. The chemical vapor deposition (CVD) method has highly toxic raw materials, and the thickness of the synthesized sample flakes is uneven, and the shape is uncontrollable

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