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Semiconductor nanomaterial for regulating and controlling up-conversion luminescence through surface plasma resonance as well as preparation method and application of semiconductor nanomaterial

A surface plasmon and nanomaterial technology, applied in the field of up-conversion luminescent materials, can solve the problems of poor up-conversion fluorescence effect and weak resonance effect, and achieve the effect of selectively enhancing fluorescence and increasing the concentration of free electrons

Pending Publication Date: 2022-07-01
JINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reported semiconductor surface plasmon resonance effect is generally weak, and the regulation of upconversion fluorescence (selective enhancement of fluorescence) is not effective.

Method used

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  • Semiconductor nanomaterial for regulating and controlling up-conversion luminescence through surface plasma resonance as well as preparation method and application of semiconductor nanomaterial
  • Semiconductor nanomaterial for regulating and controlling up-conversion luminescence through surface plasma resonance as well as preparation method and application of semiconductor nanomaterial
  • Semiconductor nanomaterial for regulating and controlling up-conversion luminescence through surface plasma resonance as well as preparation method and application of semiconductor nanomaterial

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Preparation of surface plasmon bismuth tungstate nanomaterials

[0036] (1) 2 mL of nitric acid solution with a mass fraction of 65% was dropped dropwise into 15 mL of a bismuth nitrate pentahydrate ethanol solution with a concentration of 33 mmol / L, and stirred for 15 min at a rotational speed of 30 rpm to obtain solution A.

[0037] (2) 15 mL of sodium tungstate aqueous solution with a concentration of 33 mmol / L was added dropwise to the solution A obtained in step (1), and stirred for 30 min at a rotating speed of 30 rpm to obtain a mixed solution B.

[0038] (3) The mixed solution B was transferred to a hydrothermal kettle with a capacity of 50 mL, reacted at 180° C. for 6 h and then cooled to room temperature naturally to obtain a reaction product C.

[0039] (4) Wash the reaction product C with deionized water and anhydrous ethanol solution successively, and centrifuge at 8000 rpm after washing, and after centrifugation, the precipitate is placed under v...

Embodiment 2

[0041] Example 2 Preparation of surface plasmonic bismuth tungstate / upconversion nanoparticles and regulation of upconversion luminescence

[0042] The surface plasmon bismuth tungstate nanomaterial prepared in Example 1 is used to regulate the up-conversion luminescence of rare earth, as follows:

[0043] Commercial up-conversion nanoparticles (NaYF) with an excitation wavelength of 980 nm used in this example 4:Yb,Er), the nanoparticle has a core-shell structure with a diameter of 35-45nm, a shell layer of silicon dioxide, and a thickness of 5nm, purchased from Hefei Henner Biotechnology Co., Ltd. 30 μL of 3-aminopropyltriethoxysilane was added to the above-mentioned 10 mg of up-conversion nanoparticles and stirred for 12 hours to obtain up-conversion nanoparticles with surface-modified amino groups. Then, 1 mg of the surface plasmon bismuth tungstate of Example 1 and 1 mg of amino-modified upconversion nanoparticles were placed in an ethanol solution, mixed, and sonicated ...

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Abstract

The invention belongs to the technical field of up-conversion luminescent materials, and particularly relates to a semiconductor nanomaterial for regulating up-conversion luminescence through surface plasma resonance as well as a preparation method and application of the semiconductor nanomaterial. The semiconductor nanomaterial is prepared through a hydrothermal method by taking ethanol as a reducing agent in a nitric acid acidification environment, the semiconductor nanomaterial is oxygen vacancy doped surface plasma bismuth tungstate, the size is 10-100 nm, oxygen vacancy doping can effectively improve the concentration of free electrons, and the oxygen vacancy doped surface plasma bismuth tungstate can effectively improve the concentration of the free electrons. And wide-spectrum significant surface plasma resonance is generated in a visible-near infrared region (the wavelength is 600-1300 nm). The fluorescence selectivity of the rare earth up-conversion nanoparticles can be enhanced by three orders of magnitude by utilizing the synergistic effect of local field enhancement and photothermal effect of bismuth tungstate surface plasma resonance.

Description

technical field [0001] The invention belongs to the technical field of up-conversion luminescent materials, and in particular relates to a semiconductor nano-material for regulating up-conversion luminescence by surface plasmon resonance, and a preparation method and application thereof. Background technique [0002] Rare earth upconversion fluorescence technology is widely used in fluorescent labeling, bioimaging, solar cells, near-infrared detection, etc. due to its unique anti-Stokes optical properties, high chemical stability, long fluorescence lifetime, and no damage to biological tissues. field has important applications. Currently, rare earth upconversion nanomaterials generally have low luminous efficiency, and the multi-level structure of rare earth elements leads to multiple peaks in the fluorescence spectrum, which limits their practical applications. Although noble metal surface plasmon resonance can effectively regulate the luminescence of upconversion nanomate...

Claims

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Application Information

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IPC IPC(8): C09K11/68
CPCC09K11/681
Inventor 李娟娄在祝刘璐
Owner JINAN UNIVERSITY
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