SKU: 29467763295

-NH2 modified upconverting(yellow-green)

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Description

-NH2 modified upconverting(yellow-green)Product Name Name: NH2 modified upconverting nanoparticlesyellow green light 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

Product Name

Name: -NH2 modified upconverting nanoparticles(yellow-green light)

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: 545/660 nm

Excitation wavelength: 975-980nm

Particle diameter: 35 nm

Main components: NaYREF4 (RE:Yb, Er) 

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: 29467763295

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kenny
Natrona Heights, US
★★★★★ 5
Finally, a Toy That Keeps My Dog Entertained and Active
I bought this interactive dog ball for my German Shepherd, who is very energetic and can be quite aggressive with his chewing. I've tried countless toys that either failed to hold his attention or broke within a week, but this ball is incredibly durable. The durable E-TPU material feels tough and flexible, yet lightweight, making it easy for him to carry around. The bright blue color makes it easily recognizable indoors or out, and I can spot it at a glance. The ball bounces and rolls in unpredictable patterns, keeping him alert and focused. When he tires of chasing, I switch it to slow mode so he can push the ball around easily. I've noticed he's calmer after playing in the evenings.
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Reviewed in the United States on September 27, 2025
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AmazonReviewer
Lowell, US
★★★★★ 5
Great way to keep my dog entertained!
My German Shepherd gets bored easily and tends to chew through most toys, but this interactive ball has been a lifesaver. The durable E-TPU material really holds up against his strong jaws. I love that it has 3 different play modes – it keeps him curious and busy for hours, both inside the house and in the backyard. A perfect mix of durability and fun!
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Reviewed in the United States on September 26, 2025
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Fernanda
Waukegan, US
★★★★★ 5
Sturdy interactive ball that keeps my dog engaged
I’ve been using this ball with my dog, and it’s held up well during supervised play. The three play modes are easy to switch, and he stays interested longer than with his usual toys. I mostly use it indoors when I’m working, and it helps keep him occupied. The material feels durable and safe, and I like that it’s easy to rinse off after outdoor sessions. Charging is quick with the included cable, and the mesh bag is handy for bringing it along to the park. What I noticed most is how much mental stimulation it gives him, especially when he starts to get restless in the afternoon. It’s become part of our daily routine.
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Reviewed in the United States on September 30, 2025
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MoneyPlant
Whiting, US
★★★★★ 5
My dog loves it
My 70 lb 1 year old dog plays his own soccer with this toy and he loves making it squeek but he is a toy destroyer and so far this has held up pretty well. It's made of a soft material so I don't have to worry about it harming his teeth. It's easy to clean. It can be used in the house or outside for fetch. It is unpredictable at times with its bouncing which makes it more interesting for my dog to chase after. This is his favorite toy and carries it everywhere including to bed.
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Reviewed in the United States on September 23, 2025
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Fred
Birmingham, US
★★★★★ 5
Durable Enough for Strong Jaws
I’ve gone through many toys that my dog destroys in minutes. This one has held up way better. The material feels tough, yet safe for chewing. I use it both indoors and outside, and it’s easy to rinse off when dirty. It’s been a relief to find something that can last longer in daily play.
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Reviewed in the United States on September 23, 2025

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