Method for preparing monolayer self-assembling structure of nanorods

Abstract

The invention relates to a method for preparing monolayer self-assembling structure of nanorods, and in particular relates to a method for preparing a monolayer self-assembling structure of CdSe@Cds nanorods. The method comprises the following steps: smearing a CdSe@Cds nanorod solution onto a copper screen which is wrapped with a carbon film and used for a transmission electron microscopy for observation through a dripping and smearing method; and then performing the self-assembling of the CdSe@Cds nanorods on a carbon film substrate by a thermal annealing technology. Compared with the other self-assembling methods, the self-assembling method in a thermal annealing manner is simple in process and does not require complicated supplementary instruments such as a template and the like, thereby being suitable for large-scale preparation of superlattice structures; and more importantly, the method can be used for partially removing organic insulating molecules wrapping the surfaces of the nanorods so as to improve the electric conductivity of the nanorods. The method has the advantages that the method is novel, simple, low in cost and simple to operate; and the defect in the prior art that the large-scale preparation of the nanorods with self-assembled monolayers is not realized is overcome, so that the method has a good application prospect in the field of nanocrystalline photoelectric devices.

Description

technical field [0001] The invention belongs to the technical field of novel nanomaterial self-assembly methods, and in particular relates to a construction method of a one-dimensional nanomaterial self-assembly structure. Background technique [0002] With its unique volume effect, surface effect, quantum size effect and tunnel effect, nanomaterials have potential application value in the fields of optics, electricity, materials science and biomedicine. With the development of nanoscience and technology and the continuous interdisciplinary research of applied technologies, nanomaterials are assembled into superlattices with specific structures or their specific orientations in a certain form, so as to realize the size, particle size distribution and assembly of nanomaterials. Dimensional control provides an effective means to promote the application of nanomaterials in optoelectronic devices. Self-assembly technology has become a key research topic in the field of nanotechn...

AI Technical Summary

Problems solved by technology

[0004] Although these methods have their advantages, these self-assembly techniques usually require auxiliary instruments and techniques, and the preparation steps are complicated, and it is difficult to be widely used in applications requiring low-cost, high-efficiency nano-optoelectronic devices; in addition, these methods cannot Removing the organic coordinating molecules covering the nanocrystals may even introduce more organic coordinating molecules during the self-assembly process

It is well known that the insulating properties of this type of organic coordination molecules seriously hinder the charge transport of carriers, which limits the application of nanocrystalline materials in optoelectronic devices.

[0005] Therefore, the challenge of nanocrystal-based photovoltaic devices is to remove these organic insulating molecules and further shorten the distance between nanorods.

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