The hottest new materials developed in the United

2022-10-24
  • Detail

The United States has developed new materials, or quantum dot packaging that can be used for flexible display and shatterproof

a research team of the Department of Optical Science of the Department of materials science and technology of the U.S. Naval Research Laboratory (Washington, D.C.) is developing a transparent luminescent material. This material is a thiol YNE nanocomposite polymer used to encapsulate quantum dot (QD) materials. Potential applications of this technology include flexible, stretchable and shatterproof displays

the team recently published a report on this topic, which was proposed as "photoluminescence quantum dot mercaptoalkyne nanocomposites prepared by thermal curing or photopolymerization". This material may be used for flexible display screen and replace glass

"experiments have proved that, according to the selection of starting components, polymers chemically prepared with mercaptoalkyne can exhibit rubber properties, rigidity, high refractive index properties, transparency properties, and stability at high temperatures." In addition, they can also be modified by adding other nanoparticles. These ideal material properties make mercaptoalkyne polymer materials have great application potential in some fields, such as various applications based on photoluminescence materials

at present, a specific goal of these studies is to verify the feasibility of using mercaptoalkyne polymer chemically prepared by mercaptoalkyne as QD carrier. The feasibility here is reflected in whether this party can produce such a photoluminescent QD mercaptoalkyne nanocomposite in recent years to ensure that its QD characteristic luminescence is not affected by polymerization or quenching. Therefore, China has been importing foreign garbage to make up the gap

in the current work, researchers have synthesized new ligands and used them for the functionalization of QD materials with various diameters (in chemistry, ligands are ions or molecules connected to specific metal atoms through coordination bonds. Functionalization is the process of adding new functions, features and capabilities to materials by changing the surface chemical properties of specific materials.)

the whole process required to bind the functionalized QD to the mercaptoalkyne prepolymer is to add the mercaptoalkyne prepolymer to the QD solution. This process is carried out in glass vials and then stirred vigorously for a few seconds. At this time, the prepolymer can be dripped or spun on the substrate or poured into the mold. Then the material is polymerized by UV curing or thermal curing process to make QD mercaptoalkyne nanocomposite polymer. The following figure shows these two possible material manufacturing processes

during UV curing, transparent nanocomposites will emit light of the expected color related to QD size. This proves that QD can be incorporated into mercaptoalkyne polymer material. Equipment characteristics of small spring fatigue tester: QD can be incorporated into the material without significantly changing the luminous color of QD. The researchers also confirmed the uniformity of QD distribution in the whole polymer material. The figure below illustrates the luminescence characteristics of these polymer samples containing QD

left and middle: samples of mercaptoalkyne polymer materials containing red QD under external environmental conditions; Right: mercaptoalkyne polymer material sample under UV irradiation, red QD (1.5) is shown in the matrix in the figure μ m)。

in their article, the researchers concluded that their invention "can produce a material with customized optical properties based on the monomer used in the prepolymer formula and/or the QD incorporated."

they further explained that this method of realizing QD functionalization and the synthesis of QD and mercaptoalkyne polymer materials is feasible, and summarized the synthesis and preparation of another type of QD and nanoparticles in the report

the U.S. patent and Trademark Office recently announced the patent application submitted by the Naval Research Laboratory Based on the technology described in this article. The application number of the patent application is 16/153357. They cooperate with techlink, the technology transfer office of the laboratory, and hope to commercialize this government funded research achievement through enterprises

Copyright © 2011 JIN SHI