SKU: 3174453762

SiO2 coated upconverting nanoparticles(Purpleblue)

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Description

SiO2 coated upconverting nanoparticles(Purpleblue)Product Name Name: SiO2 coated upconverting nanoparticlesPurple and blue light? span> Product Overview Upconversion nanoparticles (UCNPs) are nanomaterials that can convert low energy light into high energy light. They are composed of inorganic nanocrystals doped with rare earth ions and have unique upconversion luminescence properties. Rare earth upconversion luminescence is based on the 4f electron transition of lanthanide rare earth ions.

Product Name

Name: SiO2 coated upconverting nanoparticles(Purple and blue lightï¼?/span>

Product Overview

Upconversion nanoparticles (UCNPs) are nanomaterials that can convert low-energy light into high-energy light. They are composed of inorganic nanocrystals doped with rare earth ions and have unique upconversion luminescence properties. Rare earth upconversion luminescence is based on the 4f electron transition of lanthanide rare earth ions. Currently, the common upconversion luminescence mechanisms can be summarized into three types: excited state absorption, energy transfer upconversion, and photon avalanche.

The preparation methods of upconversion nanoparticles mainly include coprecipitation method, high-temperature pyrolysis method, hydrothermal method, solvothermal method, sol gel method, etc. In order to widely apply UCNPs in the biomedical field, in addition to improving luminescence efficiency, it is also necessary to functionalize their surfaces to enhance water solubility and biocompatibility, and achieve multifunctionality. The main surface modification methods include ligand exchange (PEG, PEI, etc. with - COOH, - NH2 groups), ligand oxidation, ligand adsorption, layer by layer self-assembly, and silica coating.

Most of the rare earth doped ions in the nuclear nanoparticles are exposed on the crystal surface, which is prone to non radiative energy transfer with the external environment, leading to fluorescence quenching and thus reducing the upconversion luminescence efficiency. The most commonly used method to reduce this quenching process is to wrap an inert shell layer on the surface of doped nanocrystals to form a core-shell structure, which confines the luminescent ions in the internal core. The shell layer increases the distance between the luminescent center ion and the external environment, effectively reducing energy transfer and thus increasing the luminescence efficiency. At present, the most commonly used method is to modify the shell layer in the previously synthesized nuclear layer structure that is the same as the matrix material, such as NaYF: Yb, Er@NaYF4 NaYF4: Yb, Tm@NaYF4.

Technical Parameter

Emission wavelength: 365/475nm

Excitation wavelength: 975-980nm

Particle diameter:50+/-10nm  Subject to actual measurement

Main componentsNaYREF4 (RE:Yb, Tm) 

Product Features

Colorful luminescence: By changing the type and concentration of rare earth ions doped, multi-color luminescence from visible light to near-infrared light can be achieved.

Stokes shift is large: Stokes shift refers to the difference between the emission wavelength and the excitation wavelength. The Stokes shift of upconversion nanoparticles is relatively large, which can effectively reduce self absorption and background interference, improve luminescence efficiency and detection sensitivity.

Good photostability: Upconversion nanoparticles have good photostability and can maintain stable luminescence performance under long-term illumination.

Good biocompatibility: Through surface modification, upconversion nanoparticles can be coupled with biomolecules (such as proteins, antibodies, etc.) to achieve biological labeling and detection.

Non damaging to biological tissues: Its excitation light source near-infrared light (980nm or 808nm) has strong light penetration, almost no damage to biological tissues, and no background fluorescence.


Application Fields

Biomedical: Upconversion nanoparticles can serve as biomarkers for cell imaging, biological detection, drug delivery, and other applications. For example, coupling upconversion nanoparticles with antibodies or biomolecules can achieve targeted labeling and detection of specific cells or biomolecules.

Optical imaging: Upconversion nanoparticles can be used for deep tissue imaging, such as in vivo animal imaging. Due to its longer emission wavelength, it can penetrate deeper biological tissues, reduce tissue scattering and self fluorescence interference, and improve imaging clarity and contrast.

Photocatalysis: Upconversion nanoparticles can convert visible light into ultraviolet or near-infrared light, thereby broadening the spectral response range of photocatalytic materials and improving photocatalytic efficiency.

Solar cells: Upconversion nanoparticles can be used to improve the efficiency of solar cells. By combining upconversion nanoparticles with solar cell materials, low-energy photons can be converted into high-energy photons, increasing the absorption and utilization of solar light by the cell.

Related Information

Please e-mail for the detailed characterization data.

E-mail:[email protected]

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SKU: 3174453762

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Westie Mom
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★★★★★ 5
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My Westie, Maisie just turned four. I bought her this awesome treat puzzle for her. I was apprehensive whether she would play with it or not. She absolutely loved it. Took about five seconds for her to get over there and figure it out. It’s very well made and sturdy. The puzzle pieces move easily and so many combinations. She had so much fun looking for treats. It sits very flat on the floor and stays in place easily. Each section has a room for a couple treats depending on the size. They were very safe conscious when they know this product. No small pieces, but the animal are even a sad child to choke on him.She had so much fun. I highly recommend this product. You won’t go wrong. Great price.
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Reviewed in the United States on May 21, 2026
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Paul
Pawtucket, US
★★★★★ 4
Fun treat/toy your dog will love!
Color: Green, Color: Green
I bought this puzzle toy as a birthday present for my dog. She loves it!!! It took her a minute to get the hang of it but now she’s a pro at getting the treats out. It’s durable and easy to fill. I have it for 3 months and there is no damage to it. She hasn’t chewed it but once in a while she will carry it around hinting she would like it filled. The price point is great.
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Reviewed in the United States on May 18, 2026
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Deborah Swaney
Massapequa, US
★★★★★ 5
Fun Brain stimulating puzzle toy
Color: Green
this is a Great Puzzle/brain toy for puppies! My Dog really enjoys interacting with it! It is well made and larger than most of the ones I saw.. sturdy stable and very good for puppies to use their brain to figure out how to get a treat!! recommend highly and price was fair and shipped very quickly
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Reviewed in the United States on April 23, 2026
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Grace H.
Waukegan, US
★★★★★ 5
Definitely recommend this product
Color: Green
Very pleased with this item - it is very similar to the Outward Hound brand but less expensive. I chose this product which doesn’t have easily removable parts - they would be a chocking hazard. Overall it seems durable, engaging and chew resistant - as long as your dog is supervised
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Reviewed in the United States on June 7, 2026
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J CASSIN
Fort Morgan, US
★★★★★ 3
Needs improvement
Color: Green
The cups are deep enough and the bone has to have the circle to rotate before the bone can move. I had a hard time figuring it out and so has Our dog . There are 4 black rubber parts included but no instruction on what to do with them. After seeing the toy move across the floor, I figured out these needed to go on the bottom 4 corners. Cute, but needs improvement.
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