Development of Fluorescence-Based Optical Chemical Sensors for Detecting of Ionic Species Soluble In Water By Using Quantum Nanocrystals

In this study, CdTeS (nanocrystals) which are known as quantum dots were colloidally synthesized in form of water-dispersible. Analysis and characterization of obtained nanocrystals were carried out by UV-vis and fluorescence spectrophotometry, TEM and XRD techniques. These particles that have been facility of application in electronic and biological areas were used to detect some pollutants with sensor applications. Because of that the obtained CdTeS nanocrystals have fluorescence properties and their spectroscopic properties have been changed by interaction with materials around them, they were used to detect alkaline and alkaline earth metal ions such as Ba2+, Ca2+, K+, Li+, Mg2+, Na+, Sr2+ in development of optic sensor. According to the obtained results, the highest fluorescence quenchnig was observed for Mg2+ ions