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Binary nano-crystalline super-lattice material and preparation method thereof

A nanocrystal and superlattice technology, which is applied in the field of binary nanocrystal superlattice materials and their preparation, can solve the problems of affecting upconversion luminescence properties, discussing regulation effects, etc., and achieves the effect of easy regulation of thickness and uniform structure

Inactive Publication Date: 2021-05-04
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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Problems solved by technology

[0003] At present, the control of the conformational relationship between the two is mainly achieved by constructing UCNPs-Au "satellite" or "core-shell" structures, disordered two-dimensional stacking structures, or through single-particle manipulation (for example, through atomic force microscopy), thereby Affects upconversion luminescence properties
However, the regulation of the Au plasmon effect on the upconversion luminescence properties has not been explored in the quasicrystal structure.

Method used

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  • Binary nano-crystalline super-lattice material and preparation method thereof
  • Binary nano-crystalline super-lattice material and preparation method thereof
  • Binary nano-crystalline super-lattice material and preparation method thereof

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preparation example Construction

[0043] Embodiments of the present invention provide a method for preparing a binary nanocrystalline superlattice material, comprising the following steps:

[0044] S1, mixing the lanthanide-doped upconversion luminescent nanocrystalline UCNPs dispersion with the Au nanoparticle dispersion to form a mixed colloidal solution;

[0045] S2. Drop the mixed colloidal solution obtained in step S1 onto the substrate; and,

[0046] S3. Solvent evaporating the mixed colloid solution on the substrate obtained in step S2 to dryness to form a binary ordered superlattice thin film on the substrate.

[0047] Further, before the step S1, the following steps are also included:

[0048] S0, preparing lanthanide-doped upconversion luminescent nanocrystalline UCNPs and Au nanoparticles respectively, and dispersing them in organic solvents respectively.

[0049] Further, the step S0 specifically includes the following steps:

[0050] Synthesis of NaGdF by Thermal Decomposition Method 4 : Yb / Er...

Embodiment 1

[0073] According to the above three steps to prepare the quasicrystalline structure UCNPs-Au superlattice, in the final mixed colloid solution, the dispersion of Au nanoparticles on the surface of dodecanethiol and NaGdF 4 : The particle diameter ratio of the Yb / Er UCNPs dispersion is about 0.6, the particle concentration of the Au nanoparticle dispersion on the surface of dodecanethiol is 2.3 mg / mL, and the NaGdF 4 : The particle concentration of the Yb / Er UCNPs dispersion is 2.4mg / mL, that is, the particle concentration ratio of the two is about 1:1.04.

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Abstract

The invention provides a binary nano-crystalline super-lattice material. The binary nano-crystalline super-lattice material is a UCNPs-Au super-lattice with a quasi-crystal structure, and the UCNPs-Au super-lattice is formed by self-assembly of lanthanide doped up-conversion luminescent nano-crystalline UCNPs and Au nano-particles. The invention also provides a preparation method of the binary nano-crystalline super-lattice material. The binary super-lattice material is uniform in structure, the thickness is easy to regulate and control, the range of the two-dimensional quasi-crystal structure can reach the micron level, and the regulation and control effect of the plasma effect of Au nano-particles on the up-conversion luminescence property can be researched in the quasi-crystal structure.

Description

technical field [0001] The invention relates to the technical field of up-conversion luminescent materials, in particular to a binary nanocrystal superlattice material and a preparation method thereof. Background technique [0002] Up-converting luminescent nanomaterials (UCNPs) have anti-Stokes shift, that is, they can convert low-energy photons into high-energy photons, so they have broad application prospects in display, multicolor imaging, and information security. At present, the controllable adjustment and improvement of the luminescent properties of UCNPs has become a research hotspot. Among them, combining UCNPs with noble metal nanostructures (such as Au) has become an effective means to regulate the upconversion luminescence process through the plasmon resonance effect. Under the action of corresponding electromagnetic waves, the surface of the noble metal will generate a strong local field, that is, local surface plasmon resonance (LSPR), which can greatly change...

Claims

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Application Information

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IPC IPC(8): C09K11/85B82Y30/00B82Y20/00
CPCC09K11/7773B82Y30/00B82Y20/00
Inventor 邓克荣权泽卫
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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