PbS-PEG-COOH Quantum Dots
Product Description
PbS-PEG-COOH quantum dots products, surface covered by hydrophilic group PEG-COOH, storage should be avoided direct sunlight, 4 degrees sealed dark storage, can be customized for customers to produce different grams of products at any wavelength from 850 nm to 1120 nm. The product has the characteristics of uniform particle size, broad absorption spectrum, narrow and symmetrical emission spectrum, high and stable fluorescence intensity, etc. It can be used in electronic communication, liquid crystal display, light-emitting diode, solar cell, bio-fluorescent labeling and other fields.
Applications
Bioimaging
Zamberlan et al. investigated the colloidal stability of PbS nanoparticles capped with dihydrolipoic acid-polyethylene glycol (DHLA-PEG) ligands, and their application in in vivo imaging. Due to the mechanism of colloidal instability, a strategy has been developed to produce stable PEg-capped PbS quantum dots with high quantum yield and light emission in the first and second near infrared (NIR) low absorption Windows of biological tissues. NIR imaging of in vivo biodistribution at wavelengths greater than 1000 nm was demonstrated to have the advantage of reduced tissue absorption and light scattering. Stability, biocompatibility and further QD functionalization potential open up realistic prospects for non-invasive bioimaging applications.
Fig. 1 (a) Photograph of a mouse head and a corresponding NIR fluorescence image of blood vessels in the head immediately after tail vein injection of LNH2 capped QDs. (b) Whole body and corresponding intensity surface, and ex vivo NIR fluorescence images of liver (left inset) and spleen (right inset) of a mouse 24 h after tail vein injection of LNH2 capped QDs. (Zamberlan et al., 2018)
Alfa Chemistry can provide a variety of complex and customized fluorescent quantum dot products. Our products involve perovskites precursors, perovskites quantum dots, quantum dot kit, single layer quantum dots, upconverting nanoparticles and other fluorescent quantum dots. Alfa Chemistry provides products with high fluorescence quantum yield, stable quality and relatively low price. Our products are constantly updated. If the product you need is not in our catalog, please feel free to contact us, we provide relevant custom services.
References
- Zamberlan, F. , et al. Stable DHLA–PEG capped PbS quantum dots: from synthesis to near-infrared biomedical imaging[J]. Journal of Materials Chemistry B, 2018, 6.
- Clift, Mjd , et al. The impact of different nanoparticle surface chemistry and size on uptake and toxicity in a murine macrophage cell line.[J]. Toxicology & Applied Pharmacology, 2008, 232(3):418-427.
* It should be noted that our service is only used for research, not for clinical use.
