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Binary superlattice material for regulating and controlling upconversion luminescence characteristic of rare earth based on plasma effect and preparation method of binary superlattice material

A rare-earth up-conversion and luminescent technology, which is applied in the direction of luminescent materials, nanotechnology for materials and surface science, chemical instruments and methods, etc., can solve complex, time-consuming, expensive and other problems

Inactive Publication Date: 2021-05-28
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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Problems solved by technology

Although there are many experimental reports, there are still some limitations and challenges to achieve controllable modulation of plasmonic pair upconversion luminescence properties.
For example, some developed nanofabrication methods require expensive, complex and time-consuming operations, while others are not suitable for large-area preparation of uniform UCNPs-Au nanoarchitectures.

Method used

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  • Binary superlattice material for regulating and controlling upconversion luminescence characteristic of rare earth based on plasma effect and preparation method of binary superlattice material
  • Binary superlattice material for regulating and controlling upconversion luminescence characteristic of rare earth based on plasma effect and preparation method of binary superlattice material
  • Binary superlattice material for regulating and controlling upconversion luminescence characteristic of rare earth based on plasma effect and preparation method of binary superlattice material

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preparation example Construction

[0048] Embodiments of the present invention provide a method for preparing a binary superlattice material with plasmonic effect-based regulation of rare earth up-conversion luminescence properties, comprising the following steps:

[0049] S1. Mix the lanthanide-doped upconversion luminescent nanoparticle UCNPs dispersion with the Au nanoparticle dispersion to form a mixed colloidal solution;

[0050] S2, drop the mixed colloid solution obtained in step S1 onto the substrate; and,

[0051] S3. The mixed colloidal solution on the substrate obtained in step S2 is evaporated to dryness by solvent, and a binary ordered superlattice film is formed on the substrate.

[0052] Further, before the step S1, the following steps are also included:

[0053] S0. Lanthanide-doped upconversion luminescent nanoparticles UCNPs and Au nanoparticles were prepared and dispersed in organic solvents, respectively.

[0054] Further, the step S0 specifically includes the following steps:

[0055] Sy...

Embodiment 1

[0081] Preparation of AB-type binary nanocrystalline superlattice samples (AB-type BNSL): the final mixed colloidal solution contains 0.6 mg / mL NaYF 4 : Au nanoparticles on the surface of Yb / Er and 2.4 mg / mL dodecanethiol.

Embodiment 2

[0083] Preparation of AB 3 type binary nanocrystalline superlattice samples (AB 3 -type BNSL): the final mixed colloid solution contains 4.7 mg / mL NaYF 4 : Au nanoparticles on the surface of Yb / Er and 4.6 mg / mL oleylamine.

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Abstract

The invention provides a binary superlattice material for regulating and controlling the upconversion luminescence characteristic of rare earth based on a plasma effect. The binary superlattice material is a two-dimensional ordered UCNPs-Au superlattice formed by self-assembly of lanthanum-based doped upconversion luminescence nanoparticles UCNPs and Au nanoparticles. The invention further provides a preparation method of the binary superlattice material for regulating and controlling the upconversion luminescence characteristic of the rare earth based on the plasma effect. According to the technical scheme, lanthanum-based doped upconversion luminescent nanoparticles UCNPs and Au nanoparticles are co-assembled through a self-assembly method, so that a large-range two-dimensional highly-ordered binary nanoparticle superlattice material can be obtained; and the order range of the binary nanoparticle superlattice material can reach more than ten microns, the up-conversion luminescence property can be effectively regulated and controlled through the plasma effect, and the corresponding relation between the superlattice structure and the up-conversion optical property is effectively established.

Description

technical field [0001] The invention relates to the technical field of up-conversion luminescent materials, in particular to a binary superlattice material capable of regulating the up-conversion luminescence properties of rare earth based on plasma effect and a preparation method thereof. Background technique [0002] Lanthanide-doped upconversion luminescent nanomaterials (UCNPs) have anti-Stokes shifts, which can convert low-energy photons into high-energy photons, so they have broad application prospects in display, multicolor imaging, and information security. At present, controllable regulation and improvement of the luminescence properties of UCNPs have become a research hotspot. Among them, combining UCNPs with noble metal nanostructures (eg, Au) has become an effective means to control their upconversion luminescence process through plasmon resonance effect. Under the action of corresponding electromagnetic waves, a strong local field, namely localized surface plas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85C09K11/02C09K11/58B82Y20/00B82Y30/00B82Y40/00B22F9/24
CPCC09K11/7773C09K11/02C09K11/58B82Y20/00B82Y30/00B82Y40/00B22F9/24
Inventor 权泽卫邓克荣徐丽丽
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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