شماره ركورد كنفرانس :
3550
عنوان مقاله :
Preparation of novel fluorescent nanosensor based on ligand capped CdTe quantum dots for Ag (I) detection
پديدآورندگان :
Elmizadeh Hamideh Department of Chemistry, Imam Khomeini International University (IKIU), Qazvin, Iran; v , Soleimani Majid Department of Chemistry, Imam Khomeini International University (IKIU), Qazvin, Iran , Faridbod Farnoush Ceneter of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran , Rezanejade Bardajee Ghasem Department of Chemistry, Payame Noor University, Tehran, Iran
كليدواژه :
Nano , sensor , Quantum dots , Silver ions , Fluorescence , Heavy metal ions
عنوان كنفرانس :
بيست و پنجمين سمينار ملي شيمي تجزيه انجمن شيمي ايران
چكيده فارسي :
The use of optical nano-sensors for detection of heavy metal ions based on quantum dots (QDs) is highly significant due to high sensitivity, selectivity and simple of operation [1-4]. In this study, a ligand-capped CdTe QDs as a novel fluorescent nano-sensor was designed for detection of Ag+ ions in aqueous samples. The surface of the CdTe QDs was modified using a new ligand. The prepared nano-sensor was characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR), ultraviolet-visible (UV–Vis) spectrophotometry and fluorescence spectroscopy. The size of the prepared nano-sensor was estimated around 2.5 nm by TEM. Optical properties of produced nanosensor were monitored by UV–Vis spectrophotometry and fluorescence spectroscopy. It was observed that fluorescence intensity of the produced nanosensor quenched selectively by addition of Ag+ ions in comparison with other metal ions tested. Using ligand-capped CdTe QDs, a rapid and facile analytical method was developed for the determination of Ag+ with a detection limit of 6.06 × 10− 10 mol L−1.
