Development of a Photodetector for Aflatoxin B1 by Quantum Dots via FRET Mechanism

Ergüder Ö., Şahin Keskin S., Trabzon L., Ünlü C.

4th International Eurasian Conference on Biological and Chemical Sciences, Ankara, Turkey, 24 - 26 November 2021, pp.355

  • Publication Type: Conference Paper / Summary Text
  • City: Ankara
  • Country: Turkey
  • Page Numbers: pp.355
  • Istanbul Technical University Affiliated: Yes


Quantum dots (QDs) are nanoscale semiconducting crystals with unique optical and electronic properties due to their size (2-10 nm). Their excellent fluorophore properties derive a high molar absorption coefficient (10-100 times higher than organic dyes), resistance to chemical degradation due to quantum confinement (high quantum yield, emission colour change with size, narrower emission band and, wider absorption bands etc.). These features of QDs are utilized in a large range of areas such as display technology, bio-imaging, biosensor, and biomolecular interactions. As we combine the advantages of QDs, QD-based FRET photodetectors can be used as an advanced and versatile optical detection platform in case of food and environment safety. Aflatoxins form a class of dangerous carcinogens that contaminate a wide range of food products and can be fatal to the human beings. To detect AFB1, we have designed both water-soluble cadmium-including QDs and heavy-metal free QDs by organometallic synthesis and microwave synthesis methods, respectively. These QDs serve as an AFB1 photodetector for use in food safety. The prepared QDs are characterized with Photoluminescence spectroscopy (PL), Fourier transform infrared spectroscopy (FT-IR) and, transmission electron microscopy (TEM) analyses. PL variations exhibit a correlation between aflatoxin B1 concentration and Fourier energy transfer among QDs and AFB1.