CdTe Core-type Quantum Dots Powder
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Product Description
Cadmium telluride quantum dots (CdTe QDs) are available in solid form. They are wrapped by carboxyl groups, which makes them soluble in water, thus forming an aqueous solution. These carboxyl-functionalized hydrophilic quantum dots can be further conjugated for use as labels. CdTe quantum dots are used in optical and display applications, solar cells and biomedical applications. Alfa Chemistry offers CdTe core-type quantum dots powder at wavelengths from 520 nm to 770 nm with a quantum dot yield of 10-66%.
CdTe Nucleated Quantum Dots COOH Functionalized
Quantum dots (QDs) or nanocrystals (NCS) have become a hot spot for basic research and practical applications due to their high surface-to-volume ratio and quantum confinement effects. In the past decades, significant progress has been made in the synthesis of colloidal semiconductor quantum dots. In particular, II-VI compounds such as CdSe and CdTe. these highly luminescent nanomaterials have a wide range of applications in the fields of optoelectronics and biomarkers. Recently, with the development of gene technology, which relies on the basic mechanism of specific antibody antigen recognition, along with the production of plasmonic ATP in antigen-antibody reactions, quantum dot semiconductors have enhanced their application in the early diagnosis of certain viral diseases. Among the type II-VI semiconductor compounds, CdTe is of interest as a direct forbidden band material with a forbidden band energy of 1.52 eV, which is suitable for emission in the visible spectral range by controlling its size through quantum confinement of carriers. In addition, it is easier to produce CdTe quantum dots in the aqueous phase compared to CdSe. This sounds remarkable for CdTe nuclear quantum dot COOH functionalization for biomarker applications, including labeling of tumor cells, sensing of drug delivery, and detection of residual pesticides. Fluorescent biomarkers using semiconductor quantum dots should be clearly classified into different types based on their complex structure and sensitivity. The simplest method is to bind luminescent quantum dots to the cell surface or inside the cell and then observe their emission under a microscope. Specific labeling is much more complex, when the antigen is specifically recognized by the corresponding antibody attached to the light-emitting quantum dot. The highest sensitivity of detection is achieved by a number of biosensor structures in which changes in fluorescence intensity or electrochemical signals can be measured with specific interactions of antibodies with antigens. Semiconductor quantum dots are used as fluorescent markers for biomedical applications such as imaging, drug delivery, nanomedicine, in vitro and in vivo biomarkers.
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