Colloid ink and method for constructing ordered nanoparticle single-layer film through ink-jet printing

Abstract

The invention belongs to the technical field of nanometer materials, and particularly relates to colloid ink and a method for constructing an ordered nanoparticle single-layer film through ink-jet printing. The colloidal ink comprises polymer grafted inorganic nanoparticles and an organic solvent, the inorganic nanoparticles are prepared by grafting the surface of a nanoparticle core through a polymer ligand, the nanoparticle core is metal or metal oxide, and the organic solvent is an organic solvent. The polymer ligand comprises at least one of polyacrylate, sulfydryl-terminated polyolefin, polystyrene and polysiloxane, and the boiling point of the organic solvent is higher than 100 DEG C. According to the colloid type ink formula, the solute is the inorganic nanoparticles with the surfaces grafted with the polymer ligands, the solvent is the organic solvent with the high boiling point and the contact angle with the substrate smaller than 50 degrees, the three-phase contact line is continuously shrunk in the drying process, and therefore ordered assembling of the nanoparticles is promoted; the method has the advantages of simple and rapid film forming process, high film forming quality and high raw material utilization rate.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a colloidal ink and a method for constructing an ordered nanoparticle monolayer film by inkjet printing. Background technique [0002] Inorganic nanoparticle films are two-dimensional nanostructured materials formed by inorganic nanoparticles, and are ideal materials for the preparation of organic nanoscale floating gate memories, ultra-sensitive SERS sensors and plasmonic photothermal converters. The film prepared from polymer-modified inorganic nanoparticles is a common inorganic nanocomposite material, and the polymer ligands on its surface can effectively adjust the assembly of nanoparticles and the structure and properties of the assembly. At the same time, due to the plasmon coupling, surface excited state electronic coupling, magnetic coupling, plasmon-excited state interaction, etc. on the surface of nanoparticles, the ordered structure formed by the sel...

AI Technical Summary

Problems solved by technology

Although these technologies can prepare inorganic nanoparticle films of centimeter scale or more, they all have their shortcomings that are difficult to overcome: the utilization rate of raw materials for the preparation of inorganic nanofilms by spin coating is low, and the order of nanoparticle arrangement is not high. ; The nanoparticles obtained by the vapor deposition method are uneven in size and disordered; although LB film technology and interface assembly technology can obtain an ordered single-layer nanoparticle film, the utilization rate of raw materials is low, and the transfer process is easy to wrinkle and break, etc.; It can be seen that these methods all have certain limitations when directly used in industrialized production.

Through the selection and proportioning of special raw material components, this technical solution makes the prepared organic titanium ink have low surface tension, easy to form a film, and is suitable for inkjet printing operations, but there are still some inconveniences in solving uneven deposition. room for improvement

[0005] Therefore, the prior art still lacks a technology based on inkjet printing to prepare single-layer ordered nanoparticle films.

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