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Light-to-heat conversion nanomaterials and their preparation and application methods

A technology of nanomaterials and light-to-heat conversion, applied in the field of nanomaterials and methods, can solve the problems of complex preparation process, difficulty in avoiding the quenching effect of metal nanostructures on upconversion luminescence, difficult size control, etc., and achieve good repeatability Effect

Inactive Publication Date: 2015-09-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are also reports in the literature that combine the light-to-heat conversion properties of metal materials and the unique luminescence properties of up-conversion materials to construct up-conversion-metal core-shell structures, such heterogeneous core-shell structures also have complex preparation processes and difficult size control. problem, and it is difficult to avoid the quenching effect of metal nanostructures on upconversion luminescence

Method used

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  • Light-to-heat conversion nanomaterials and their preparation and application methods
  • Light-to-heat conversion nanomaterials and their preparation and application methods
  • Light-to-heat conversion nanomaterials and their preparation and application methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh raw material Er(CH 3 COO) 3 0.02mmol, Yb(CH 3 COO) 3 0.2mmol, Gd(CH 3 COO) 3 0.78mmol, measure 15ml of 1-octadecene and 6ml of oleic acid as the reaction solvent. After mixing the raw materials and solvent, stir and heat to 110°C under Ar atmosphere, and keep it warm for 30min to form a clear and transparent rare earth ion precursor solution. Cool to 50°C under Ar atmosphere. Weigh 2.5mmol NaOH and 4mmol NH 4F was dissolved in 10ml of methanol, and then added to the above-mentioned rare earth ion precursor solution, and then the mixed solution was kept at 50°C for 30min under Ar atmosphere, and then the temperature was raised to 70°C to remove the methanol in the mixed solution, and then the temperature was rapidly raised to 305°C, and kept 90min. The final solution was cooled to 90° C., added with 20 ml of ethanol and centrifuged three times to obtain well-dispersed nanoparticles with a particle diameter of about 7.5 nm. Its microscopic morphology, crysta...

Embodiment 2

[0035] Weigh raw material Er(CH 3 COO) 3 0.02mmol, Yb(CH 3 COO) 3 0.2mmol, Y(CH 3 COO) 3 0.78mmol, take 15ml of 1-octadecene and 6ml of oleic acid as the reaction solvent. After mixing the raw materials and solvent, stir and heat to 160°C under Ar atmosphere, and keep it for 20min to form a clear and transparent rare earth ion precursor solution. Cool to 25°C under Ar atmosphere. Weigh 2.5mmol NaOH and 4mmol NH 4 F was dissolved in 10ml of methanol, and then added to the above-mentioned rare earth ion precursor solution, and then the mixed solution was kept at 50°C for 30min under Ar atmosphere, and then the temperature was raised to 100°C to remove the methanol in the mixed solution, and then the temperature was rapidly raised to 300°C, and kept 90min. The final solution was cooled to 90° C., added with 20 ml of ethanol and centrifuged three times to obtain well-dispersed nanoparticles with a particle diameter of about 26 nm.

Embodiment 3

[0037] Weigh raw material Er(CH 3 COO) 3 0.02mmol, Yb(CH 3 COO) 3 0.2mmol, Y(CH 3 COO) 3 0.78mmol, measure 15ml of 1-octadecene and 6ml of oleic acid as the reaction solvent. After mixing the raw materials and solvent, stir and heat to 100°C under Ar atmosphere, and keep it warm for 60min to form a clear and transparent rare earth ion precursor solution. Cool to 50°C under Ar atmosphere. Weigh 2.5mmol NaOH and 3mmol NH 4 F was dissolved in 10ml of methanol, and then added to the above-mentioned rare earth ion precursor solution, and then the mixed solution was kept at 50°C for 30min under Ar atmosphere, and then the temperature was raised to 70°C to remove the methanol in the mixed solution, and then the temperature was rapidly raised to 320°C, and kept 90min. The final solution was cooled to 90° C., added with 20 ml of ethanol and centrifuged three times to obtain well-dispersed nanoparticles with a particle diameter of about 40 nm.

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Abstract

The invention provides a photothermal conversion nanometer material. The chemical formula of the photothermal conversion nanometer material is AR1-x-yF4, wherein Ybx and Ery are doped in the AR1-x-yF4, A is at least one of Li, Na or K, R is at least one of Y, Gd, Lu, or Nd, x is less than or equal to 0.6 and greater than or equal to 0.01, and y is less than or equal to 0.1 and equal to or greater than 0.01; the particle size of the photothermal conversion nanometer material particles is within the wavelength range of 5-40nm. The photothermal conversion nanometer material can emit visible light with the range of 520-660nm under the excitation effect of the near infrared laser with the wavelength range of 750-1100nm, while a temperature rise of about 5-300 DEG C can be achieved, and since the ratio of the emission band with the wavelength of 525nm and emission band with the wavelength of 545nm in the emitted light and the temperature meet a good exponential relationship, the temperature detection function can be realized. The photothermal conversion nanometer material has the significant characteristics that the material can absorb near-infrared laser with the wavelength range of 750-1100nm and the photothermal conversion, upconversion luminescence and temperature detection functions are achieved simultaneously. Another object of the invention is to provide a preparation method and application method of the photothermal conversion nanometer material, and the preparation method is simple, easy to operate, free of pollution and low in cost.

Description

technical field [0001] The invention belongs to the field of nanomaterials and technologies, and relates to a photothermal conversion nanomaterial capable of simultaneously realizing nanoscale heating, temperature sensing and upconversion luminescence, and a preparation and application method thereof. Background technique [0002] Nanomaterials have attracted extensive attention in the scientific and technological circles because of their unique quantum size effects and surface-interface effects. Photothermal conversion nanoparticles (or nanoheaters, nanoheaters) that can accurately realize selective heating of micro-regions have a wide range of applications in the fields of biomedicine, microfluidic chips, optical storage, and laser direct writing. For example: the high heat brought by photothermal conversion can destroy and eliminate cancer cells. Compared with traditional surgery, radiation or chemotherapy, this kind of photothermal therapy can significantly reduce the da...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/85G01K11/20
Inventor 邵起越金笠飞董岩曾宇乔方峰蒋建清
Owner SOUTHEAST UNIV
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