-NH2 modified upconverting(yellow-green)
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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Eduardo Renta
Waukegan, US
★★★★★ 5
⭐⭐⭐⭐⭐ Clean Look, Comfortable Ride
Size: 11.5 Wide, Color: Woodbury Handstain
The Cole Haan Men’s GrandPro Tennis sneakers are a perfect mix of laid-back and polished — the kind of shoe you can wear everywhere without thinking too hard about it. Right off the bat, the design is subtle but refined. They’re minimalist enough to pair with jeans and a hoodie, but they also work with chinos and a button-down for a more put-together look. The “tennis” aesthetic keeps it classic without feeling like you’re wearing athletic shoes. Comfort is where these really shine. They’re lightweight and cushioned in all the right places, so long walks, errands, or standing around at events don’t end with sore feet. There’s no stiff break-in period — they feel good from the first wear. The sole has just the right balance of support and flexibility, which makes them easy to wear all day. The materials feel good too — soft, sturdy, and not flimsy. They hold up well after repeated wear and still look fresh even after a few outings. They don’t crease or scuff up excessively, which is always nice. If I had to point out a downside, it’s that they’re not performance sneakers for athletics — but that’s not what they’re meant to be. They’re lifestyle shoes that look great and feel great for everyday wear. Overall, a solid go-to sneaker that elevates casual outfits and keeps comfort front and center. Easy recommend if you want versatile kicks that stay stylish without being loud. I was able to pick up this particular pair here on Amazon for 50 bucks, 56 total with everything and honestly I’m still scratching my head in that deal. I mean my New Balance were 70 bucks or something like that. These are brown leather, sophisticated and comfortable, just amazing shoes. I get compliments all the time.
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Reviewed in the United States on February 16, 2026
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Deborah Barnum
Alexandria, US
★★★★★ 5
Quality and Comfort
Size: 12, Color: White
My husband is a Cole Haan shoe person and what we love mostly is the comfort and quality and style.
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Reviewed in the United States on May 13, 2026
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superbrain
San Leandro, US
★★★★★ 5
Size seems spot on shoe is beautiful
Size: 12, Color: White
These are beautiful shoes. A great cross between the ubiquitous flat as a board shoes like vans and tennis shoes. More comfortable than the super flat shoes and more formal than sneakers. Very soft leather. Not much arch support and I don't know if an insert would fit well. I am between an 11.5 and 12 in most brands (actual foot length from heel to tip of big toe is 11 and 1/8 inches). These fit perfectly in a 12 with room for comfort. An 11.5 probably would fit but snugly. I do not agree that they should be sized down at least based on my experience. If you can get these for under eighty dollars like I did they are well worth it. I'll be wearing them all summer.
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Reviewed in the United States on May 15, 2021
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It's cool.
Waukegan, US
★★★★★ 4
Weightless, well made. But there are problems with size
Size: 8.5, Color: White
I bought it for a teenager, for size 81/2. This, according to the dimensions on the page, is 25.9 centimeters. They came, the size was indicated correctly, but they are large for the child. Very large. They fit me, size 10. The child is disappointed. Well made, look neat on the foot. Almost weightless But I can't give the maximum rating. I wish the seller to deal with the size grid.
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Reviewed in the United States on April 15, 2026
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Matthew Gonzales
Draper, US
★★★★★ 5
Amazing Shoe!
Size: 9 Wide, Color: Blazer Blue Hand Stain
Amazing shoe!! Comfortable to wear for long periods of time! Highly recommend!! 👍🏾
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Reviewed in the United States on November 17, 2025

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