A kind of nanocrystalline composite material and preparation method thereof

A composite material, nanocrystal technology, applied in luminescent materials, nanotechnology, nano-optics and other directions, can solve problems such as unfavorable applications, low fluorescence efficiency, etc., and achieve the effects of low cost, good product dispersion and high yield

Active Publication Date: 2019-03-19
湖南早晨纳米机器人有限公司
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Problems solved by technology

Although multicolor luminescence can be achieved by co-doping a variety of rare earth ions, the non-radiative cross-relaxation between rare earth ions increases sharply with the increase of ion species and concentration, which eventually leads to extremely low fluorescence efficiency. conducive to practical application

Method used

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  • A kind of nanocrystalline composite material and preparation method thereof
  • A kind of nanocrystalline composite material and preparation method thereof
  • A kind of nanocrystalline composite material and preparation method thereof

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Embodiment Construction

[0038] 1. Add 0.75 millimoles of lutetium acetate, 0.2 millimoles of cerium acetate, 0.05 moles of terbium acetate, and 8 milliliters of oleic acid into a three-necked flask. o After being incubated at a temperature of C for 1 hour, 12 milliliters of octadecene was added to the three-necked flask, and at 160 o Continue to incubate at a temperature of C for 1 hour to obtain a clear solution A; after the solution A is naturally cooled to room temperature, add 6 milliliters of methanol solution containing 3 mmoles of ammonium fluoride and 1.5 mmoles of sodium hydroxide to the solution A dropwise , then at 80 o C kept warm for half an hour; after the methanol solution was completely volatilized, the temperature was rapidly raised to 280 o C, and kept at this temperature for 90 minutes, then naturally cooled to room temperature; the resulting nanocrystals were washed with a mixed solution of ethanol and cyclohexane, and finally the Ce / Tb:NaLuF 4 Nanocrystals are stored in 4ml cyc...

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Abstract

The invention belongs to the field of inorganic materials and relates to a multiband excited multicolor composite nanomaterial and a preparation method thereof. A nanocrystalline composite material isobtained by surface chemical bonding action of two precursors of Ce / Tb:NaLuF4 nanocrystal and Yb / Er:Na3ZrF7 nanocrystal. According to the composite nanocrystalline material, upconversion and down-conversion luminescence rare earth ions are doped into different matrixes, so that a non-radiative cross-relaxation process between the rare earth ions is inhibited; in addition, a high-efficiency multiband excitation multicolor luminescent property can be realized; the system is expected to be actually applied in the fields of multimode imaging and optical anti-counterfeiting.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and relates to a multi-color composite nano material excited by multi-bands and a preparation method thereof. Background technique [0002] The energy levels of rare earth ions are very rich, and different luminescent properties can be achieved in different matrix materials. For example, the controllable emission of erbium ions from green to red light can be realized through crystal structure regulation, which is conducive to the realization of multicolor luminescence. The construction of nanocrystalline composite materials can realize the flexible adjustment of excitation wavelength and emission wavelength, that is, multi-color emission with multi-band excitation. This multicolor luminescent nanocomposite material dependent on the excitation wavelength has a good application prospect in the fields of multimodal bioimaging and fluorescent anti-counterfeiting labels. Although multicolor lumines...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/85B82Y20/00
CPCB82Y20/00C09K11/7773
Inventor 杨道救
Owner 湖南早晨纳米机器人有限公司
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