Product Description
CdTe quantum dots offered by Alfa Chemistry have promising applications in deep tissue imaging due to their easier luminescence range to the near infrared region. The oil-soluble CdTe quantum dots have uniform size, good dispersion and high crystallinity, while the water-soluble CdTe quantum dots with good dispersion have carboxyl groups on the surface and can be easily modified. CdTe quantum dots have a wide excitation wavelength range and a narrow emission wavelength range, and can be used to excite multiple quantum dots simultaneously with the same excitation light and emit fluorescence at different wavelengths, which can be applied to immunofluorescence detection as well as make a certain contribution to the application in the field of optoelectronics.
The types of quantum dots we offer include:
CdTe Core-type Quantum Dots Powder with wavelengths from 610 nm to 770 nm, quantum yields from 10% to 66%.
CdTe Quantum Dots Powder at wavelengths from 510 nm to 780 nm with quantum yields from 15 to 90 %.
Mononuclear Water-soluble CdTe Quantum Dots (carboxy amino Modification) are CdTe quantum dots coated with amino and carboxyl groups, with emission peaks from 518 nm to 618 nm, quantum yields ≧ 40%.
Oil Soluble CdTe Quantum Dots are CdTe quantum dots with modified hydrophobic groups that can be dispersed in organic solvents, with wavelengths from 515 nm to 615 nm and quantum yields ≧ 40%.
Water Soluble CdTe Quantum Dots are from 520 nm to 620 nm with quantum yields ≧ 30%.
Water-phase CdTe (carboxyl) Quantum Dots are CdTe quantum dots with modified hydrophilic groups, which can be dispersed in water with emission peaks from 520 nm to 800 nm.
Applications
Optoelectronic Applications
The effect of dispersion of semiconductor cadmium telluride quantum dots (CdTe QD) on the optical, electrical and thermal properties and supramolecular order of discoidal liquid crystals (DLCs) capped with highly luminescent alkylamines has been demonstrated for the first time by Kumar et al. The insertion and properties of CdTe quantum dots in the columnar intermediate phase were investigated by UV-Vis spectroscopy, photoluminescence spectroscopy, polarized light microscopy, differential scanning calorimetry, X-ray diffraction and DC conductivity. The results show that the uniform dispersion of CdTe quantum dots in the columnar matrix does not destroy the intermediate phase, but significantly increases the electrical conductivity of the system.
Fig. 1 Structure of the octadecylamine capped CdTe quantum dot. (Kumar et al., 2014)
Biosensors
A fluorometric assay based on enzymatically immobilized glutathione (GSH)-capped CdTe quantum dots (QDs) was developed by Korram et al. for the monitoring of organophosphorus pesticides.
Fig. 2 Schematic presentation of fluorescence probing inhibition and reactivation of AChE. (Korram et al., 2020)
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
- Kumar M , Kumar S . Luminescent CdTe quantum dots incarcerated in a columnar matrix of discotic liquid crystals for optoelectronic applications[J]. Rsc Advances, 2014, 5(2):1262-1267.
- Korram, et al. CdTe QD-based inhibition and reactivation assay of acetylcholinesterase for the detection of organophosphorus pesticides[J]. RSC Advances, 2020.
* It should be noted that our service is only used for research, not for clinical use.
