Sensitive Hg (II) ion detection by fluorescent multilayer films fabricated with quantum dots

Synthesis and application of intercellular Ca2+-sensitive fluorescent probe based on quantum dots

“…QDs also act as ion probes and primarily concentrated on heavy metal ions Hg 2+ [17][18][19], Cu 2+ [20], Ag + [21,22], Pb 2+ [23], Zn 2+ [24] etc. The extremely small solubility product was based on combining heavy metal ions with S 2− on the surface of QDs [25], leading to quenching of the fluorescence because of the destruction on the surface of QDs.…”

DNA-functionalized upconversion nanoparticles as biosensors for rapid, sensitive, and selective detection of Hg2+ in complex matrices

“…Lanthanide-doped upconversion nanoparticles (UCNPs), which are capable of emitting strong visible fluorescence under the 35 excitation of near-infrared (NIR) light (typically ca. 980 nm), have attracted considerable attention.…”

Analytical strategies based on quantum dots for heavy metal ions detection

“…Instead of working in solution as described in the above methods, Wang et al proposed the use of fluorescent multilayer films fabricated with QDs for the detection of Hg 2þ . 66 CdTe QDs capped with mercaptosuccinic acid were prepared in aqueous medium and deposited on the quartz slides to form multilayer films by electrostatic interactions with poly (dimethyldiallyl ammonium chloride) (PDDA). These PDDA/ QDs multilayer films were easily fabricated and showed high photostability.…”