Carboxyl Graphene quantum dots
SKU: 21320402713

Carboxyl Graphene quantum dots

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Description

Carboxyl Graphene quantum dotsProduct Name Name: Carboxyl Graphene quantum dots Product Overview Graphene quantum dots (GQDs) are nanoscale fragments of graphene with unique physical and chemical properties, such as quantum size effects, edge effects, etc. By specific synthesis methods, the size, shape, and luminescent properties of GQDs can be controlled. At present, Xianfeng Nano's available quantum dots are divided into graphene oxide quantum dots, graphene quantum dots,

Product Name

Name: Carboxyl Graphene quantum dots

Product Overview

Graphene quantum dots (GQDs) are nanoscale fragments of graphene with unique physical and chemical properties, such as quantum size effects, edge effects, etc. By specific synthesis methods, the size, shape, and luminescent properties of GQDs can be controlled. At present, Xianfeng Nano's available quantum dots are divided into graphene oxide quantum dots, graphene quantum dots, semiconductor quantum dots, etc. Customers can choose according to their experimental needs. The preparation methods of graphene quantum dots on sale are divided into bottom-up and top-down, with different colors of luminescence available, such as green light, blue light, red light, and white light. Meanwhile, graphene quantum dots with different functional groups can be selected, which is also helpful for later modification coupling. In addition, nitrogen doped and boron doped graphene quantum dots can be selected. At present, the applications of graphene quantum dots are mostly focused on fluorescence imaging, nanoadditives, antibacterial, and biotoxicity.


Technical Parameter

 

Form: Light yellow particles

Purity:~80%

Note: The water solubility and fluorescence intensity of the powder sample are slightly lower than those of the corresponding solution. Please consult before purchasing.

 

Product Features

 

Quantum effects: Graphene quantum dots exhibit significant quantum confinement and edge effects due to their extremely small size (usually less than 100 nanometers, and can even reach below 10 nanometers). These effects endow CGQDs with unique optical, electrical, and chemical properties.

Good water solubility: Due to the presence of carboxyl groups on the surface, CGQDs have good water solubility, making them easy to disperse and process in aqueous solutions.

Biocompatibility: Carboxylation modification enhances the biocompatibility of graphene quantum dots, making them more suitable for biomedical applications.

Chemical reactivity: The presence of carboxyl groups endows CGQDs with high chemical reactivity, allowing them to connect or modify with other molecules or materials through chemical reactions.


Application Fields

 

Biological imaging: CGQDs have excellent fluorescence performance and biocompatibility, and are therefore widely used in fields such as cell imaging, biomarkers, and tissue imaging.

Optoelectronic devices: With their unique optical and electrical properties, CGQDs have shown potential application value in optoelectronic devices such as light-emitting diodes (LEDs), solar cells, and other fields.

Sensors: The high sensitivity and rapid response capability of CGQDs make them ideal materials for making biosensors and chemical sensors.


Related Information

This product has low fluorescence intensity, please consult before purchase.

Please e-mail for the detailed characterization data.

E-mail:[email protected]

 

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SKU: 21320402713

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A.G.
Alexandria, US
★★★★★ 5
Three really solid stories here.
Art is top notch. We get three really nice stories of pre-Punisher Frank, mid-Punisher Frank and the end of Punisher Frank. I look at this book a couple times a year and Garth Ennis really did a great job on the character. The art by Severin, LaRosa and Corben were all great and fitting for their stories. Good collection if you can find it. Highly recommend.
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Reviewed in the United States on January 22, 2026
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The Critic
Lexington, US
★★★★★ 4
Vintage Castle
Garth Ennis renders one of his hectic stories with Frank Castle coming back to his origins. The first story deploys Frank's childhood and the unexpected consequences of it later on. I humbly believe the second part(The cell), is the best of this issue. It narrates the ultimate vengeance of Castle against those who took the lifes of his family, several years ago in the middle of a shooting at day light in Central Park. A mention must be done of the art in The Cell. The pencils of Lewis Larosa, the Inks & Finishes of Scott Koblish and Raúl Treviño's colors, leave nothing to desire and accomplish to portrait that classic look of Castle as a somewhat mature/old man still capable of hell when it comes to seek revenge for his family. The End, however, which puts Castle in a dystopian future of a post-nuclear bombing, fails to blend smoothly Garth Ennis' script with the caricaturesque art from Richard Corben and Lee Loughridge. There is a dissonance between this very old Frank Castle in an apocalyptic environment and the drawings that for some reason maintain a gap with previous artists. As a whole, From First to Last is totally worthy. Garth Ennis is back to team with Castle and that's all what counts. Cristián Gómez O.
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Reviewed in the United States on February 20, 2011
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Alejandro duarte
Battle Creek, US
★★★★★ 5
I love the Punisher.!!
I loved it good story’s I recommend it.
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Reviewed in the United States on February 15, 2026
J
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James N. Smith
Bozeman, US
★★★★★ 5
This Is the Punisher
Format: Kindle
Punisher was supposed to be just a villain of the month, but there was always something there. Marvel never quite knew what to do with him, but Frank Castle had staying power. He still doesn’t fit into the Marvel universe, and he certainly doesn’t fit into the MCU, and these stories show exactly why. This is a great character and when handled correctly you get stories that stay with you. Garth Ennis knew how to tell those stories. I hope one day someone else will come along and give us more.
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Reviewed in the United States on May 11, 2025
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Kristofer
Whiting, US
★★★★★ 5
Mandatory reading
Format: Kindle
These are great. If you're an Ennis fan, this is your book. Each story has its own style. You won't be disappointed.
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Reviewed in the United States on June 2, 2024

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