Perovskite Quantum Dots Supplier - Alfa Chemistry

Detection of Pathogenic Bacteria by Carbon Quantum Dot Fluorescent Probe


Alfa Chemistry has always been doing its best to provide customers with the best quality service. As various pathogenic bacteria in the environment are potential factors that endanger human health, we are constantly improving the corresponding rapid and accurate detection methods. Through quantum dot fluorescent probes, the detection of pathogenic bacteria can be well completed. The professional team of Alfa Chemistry strengthens cooperation and develops a series of high-quality solutions for customers.

Schematic diagram of pathogenic microorganisms detected by carbon quantum dots fluorescent probesSchematic diagram of pathogenic microorganisms detected by carbon quantum dots fluorescent probes


Some microorganisms such as bacteria and fungi can threaten human health and are called pathogenic bacteria. For example: Staphylococcus aureus, Yersinia pestis, Candida albicans, etc. The existence of these pathogens poses a considerable risk to human health. Carbon quantum dots (CQDs), due to their unique optical properties, such as excellent fluorescence performance, good fluorescence stability, easy chemical modification and functionalization, make carbon quantum dot fluorescent probes useful in the detection of pathogenic bacteria. Great potential for development. Compared with the traditional detection methods of pathogenic bacteria, carbon quantum dot fluorescent probe detection technology is simple to operate, rapid detection, and does not require large-scale equipment; compared with quantum dot fluorescent probes containing heavy metals such as cadmium and arsenic, carbon quantum dots It has the fluorescence performance that is not weaker than that of quantum dots, low preparation cost and environmentally friendly properties.


Alfa Chemistry's technical experts offer fluorescent probe designs from quantum dots and a full suite of custom pathogenic bacteria detection services. Our services include the following:

  • Custom of Quantum Dot Fluorescent Probes
  • Detection of Pathogenic Bacteria

Why choose carbon quantum dot fluorescent probe?

The application of carbon quantum dots in the detection of food-borne pathogenic bacteria is realized by combining carbon quantum dots with specific recognition substances such as aptamers, antibiotics and biomolecules (including antibodies and carbohydrates) into composite fluorescent probes. The change of the fluorescence intensity of the composite probe is used to detect Escherichia coli and Salmonella. This detection method greatly improves the anti-interference ability and specificity of the carbon quantum dot fluorescent probe.

Preparation method of composite fluorescent probe

There are two main types: one is to use NHS and EDC to activate the carboxyl groups on the surface of carbon quantum dots, and then couple with the amino groups of specific recognition substances to form amides.

The other is to fix the specific substance and the carbon source to the surface of the carbon quantum dot by means of an amide bond through the one-step hydrothermal carbonization of the specific substance.

Advantages of our services

  • Years of experience and experience in customized solutions.
  • Experienced experimental technicians, exquisite experimental operation level, strict experimental control system, fast delivery cycle of data results, while ensuring that the test results are objective and reliable.
  • Complete instrument platform, high standard laboratory, higher sensitivity, more accurate detection data.
  • Competitive price.

Service process

Service process

Our customer service representatives are enthusiastic and trustworthy 24 hours a day, Monday to Friday. Please do not hesitate to contact us for more information or to discuss in detail, if you are interested in our services.

* It should be noted that our service is only used for research, not for clinical use.


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