Water-soluble red fluorescence carbon quantum dot powder XF346
SKU: 50017221194

Water-soluble red fluorescence carbon quantum dot powder XF346

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Description

Water-soluble red fluorescence carbon quantum dot powder XF346Product Name Name: Water soluble red fluorescence carbon quantum dot powder Product Overview carbon quantum dots CQDs are quasi spherical amorphous carbon nanocrystals composed of sp2 and sp3 cluster carbon structures, surrounded by abundant oxygen containing functional groups such as hydroxyl, carbonyl, carboxyl, etc. Their main constituent elements are C, H, O, and N. The luminescence mechanism of CQDs can be mainly attributed to these three types:

Product Name

 

Name:Water-soluble red fluorescence carbon quantum dot powder


Product Overview

 carbon quantum dots CQDs are quasi spherical amorphous carbon nanocrystals composed of sp2 and sp3 cluster carbon structures, surrounded by abundant oxygen-containing functional groups such as hydroxyl, carbonyl, carboxyl, etc. Their main constituent elements are C, H, O, and N. The luminescence mechanism of CQDs can be mainly attributed to these three types: quantum confinement effect, surface state luminescence, and molecular state luminescence. Carbon quantum dots are composed of C=C and C-C bond cores that are prone to π→π * transitions, as well as various organic molecular functional groups distributed on the surface that are prone to n →π * transitions. The structure and composition of carbon quantum dots result in strong absorption of short wavelength light waves in the ultraviolet range (260-320 nm), accompanied by low-intensity absorption of visible light (400-710 nm).

The preparation methods of carbon quantum dots are divided into top-down method and top-down method. The top-down method is to cut large-sized carbon structural materials through physical or chemical methods, mainly including arc discharge, laser ablation, ultrasonic treatment, and chemical oxidation. The bottom-up approach is to aggregate small molecule precursors into large-sized CQDs through chemical reactions, mainly including water/solvothermal, template method, microwave-assisted, and solid-phase methods.


Technical Parameter

Concentration:0.05 mg/mL:.1 mg/ml:.5 mg/ml

Granularity:2-5 nm

Solvent:Water

Appearance:Fuchsia dispersion

 

Product Features

 

1. Good water solubility: The surface of carbon quantum dots usually contains abundant hydrophilic groups, such as hydroxyl and carboxyl groups, which enable them to be uniformly dispersed in the aqueous phase, facilitating their applications in biological systems and aqueous environments.

2. Low toxicity and good biocompatibility: Carbon quantum dots have low toxicity to organisms and do not cause significant cell damage or immune reactions.

3. High chemical stability: able to maintain stable structure and performance over a wide range of pH values, temperature conditions, and chemical environments.

4. Easy to functionalize: The abundant functional groups on the surface provide active sites for further chemical modification, which can connect various biomolecules, drug molecules, or other functional groups.

5. Excellent optical performance: It has strong fluorescence emission and high fluorescence quantum yield. Its fluorescence emission wavelength can be adjusted by changing the size, surface state, or doping.


Application Fields

 

1. Biological imaging: Carbon quantum dots have good biocompatibility and low toxicity, and can enter the interior of cells without producing significant cytotoxicity. For example, carbon quantum dots modified with specific antibodies can specifically label antigens on the surface of cancer cells, enabling high-resolution imaging of cancer cells and aiding in early diagnosis of cancer.

2. Biological detection: Due to the influence of metal ions on the fluorescence of carbon quantum dots, they can be used to detect metal ions in the environment or biological samples. For example, when mercury ions are present, the fluorescence of carbon quantum dots will be quenched, thereby achieving sensitive detection of mercury ions. At the same time, it can interact with specific biomolecules (such as proteins, nucleic acids, glucose, etc.) to cause fluorescence changes, which is used for quantitative detection of biomolecules. For example, by binding to aptamers, carbon quantum dots can specifically recognize and detect trace biomarkers in the blood, such as tumor markers.

3. Photocatalytic water splitting for hydrogen production: Composite with semiconductor materials to promote the separation and transfer of photogenerated charges, improving the efficiency of photocatalytic water splitting for hydrogen production. For example, loading carbon quantum dots on the surface of titanium dioxide significantly enhances its photocatalytic activity under visible light and increases hydrogen production.

4. Light emitting devices: Used as a light emitting layer or auxiliary layer in LEDs to improve device performance. For example, carbon quantum dot based LEDs can achieve high brightness and wide color gamut luminescence.

5. Drug carrier: Using its surface functional groups to load drug molecules and achieving controlled drug release through stimulus response (such as pH, temperature, light, etc.). For example, in acidic environments (such as the microenvironment of tumor tissue), carbon quantum dot drug delivery systems release drugs to achieve targeted therapy for tumors.


Related Information

Please e-mail for the detailed characterization data.


E-mail:[email protected]

 

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SKU: 50017221194

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Ann
Los Angeles, US
★★★★★ 5
Timex. Life is ticking.
Color: Black, Size: One Size
A family member is headed off to Navy boot camp and is required to have a watch-a black watch. But...it cannot be anything in the realm of, be like, or indeed be an Apple Watch. The search began for a simple timepiece. Economy was important since after the 8 weeks of boot camp ended, use of the current watch would be resumed. Enter Timex...(the world's largest manufacturer of watches and mechanical time fuses). During the Amazon search there were all manner of economically (actually cheap) watches noted to be available, so many that it was simply overwhelming. Timex...tried and true since 1854 (just a fun fact, but actually attests to the quality of the company) was the chosen one. A simple but reliable timepiece was required, and certain qualifications were needed. First, it had to be an accurate time keeper and have a second hand, and have a date indicator. Secondly, there had to be an element of water resistance (this is Navy boot camp after all, so water is important!). Thirdly, it had to be black. Fourth, no bells or whistles whatsoever. Finally, a face with 24 hour/military time would be a bonus. This Timex Rugged Core Expedition Analog Watch fit the bill. Upon arrival it was packaged in a traditionally square box the size of the watch, no frills but sturdy enough to ward off damage during shipping. Once opened the first thing noticed was the face of the watch. It was black, with white numerals in both standard and 24 hour/military time, had a red second hand, luminescent hour and minute hands, and date indicator. The nylon band was also black, had ridges, and had a fastener like a belt. At the end of the band were two extrusions which seemed to lock the excess band into place once it was fastened. After wearing a number of days, the watch has kept excellent time matching the Apple Watch. Both watches were worn on the same arm at the same during the day and during sleep. They were worn during regular daily activities, during exercise and during strenuous garden work such as hauling, digging holes, dragging 40 lb bags, etc. Time was checked multiple times per day, and the time on each watch was exactly the same every time checked. The Timex was water resistant during a 5 minute shower and while submerged water. This is not a dive watch but, according to the ad, is water resistant to 50 feet for light swimming. The performance of this watch has been more than satisfactory executing in stellar fashion everything it was stated to be able to do. I can recommend this watch for boot camp purposes without reservation. Top 3 Likes: -Reliable keeping accurate time, has military time numerals -Is water resistant as tested -Is black, attractive with luminescent hands, second hand, date, and light up face Top 3 Dislikes: -The band is stiff and somewhat difficult to latch -The two little extrusions do anchor the band, but are difficult to undo to take off the watch -Only two dislikes!
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Reviewed in the United States on September 28, 2024
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rlbrandner
Grantham, US
★★★★★ 5
Timesx quality still rules.
Color: Black, Size: One Size
Excellent everyday watch. Stylish, easy to read, and accurate. Needed a knock around watch and this puts up with it's share of abuse. It's a bit more expensive than some others in this class, but Timex is well-worth the money in quality. I use mine for eveything except when I need something more formal.
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Reviewed in the United States on December 1, 2025
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Alex
Whiting, US
★★★★★ 1
Dependability and accuracy
Color: Black, Size: One Size
This watch is awful, I had it for a month and it lags behind and does not keep the right date. I am a nurse so I need to have accuracy and dependability and this watch is not it.
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Reviewed in the United States on February 16, 2026
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SB
Pawtucket, US
★★★★★ 5
Good stuff
Color: Black, Size: One Size
fits well, good for every day wear, looks great, great value. the black is a good color. would have loved some more insight into how to change the date but other than that would def recommend
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Reviewed in the United States on January 31, 2026
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Oscar De Leon
Bozeman, US
★★★★★ 5
Beutiful and rugget watch.
Color: Black, Size: One Size
Beutiful aspect, great and rugget watch, looks great on the wrist, nice and clear backlight, very ligth watch.
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Reviewed in the United States on April 6, 2026

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