A new fluorescence sensor for the determination of thioctic acid (TA) in aqueous media based on the recovered fluorescence of N-acetyl-l-cysteine capped CdTe quantum dots [NALC-CdTe QDs]–Cu2+ system was proposed.
A turn-on fluorescence sensor is introduced for determination of trace amount of cyanide, based on glutathione-capped Cd–Te quantum dots.