Metal Ion Detection by Carbon Dots—A Review

Eco Friendly Synthesis of Carbon Dot by Hydrothermal Method for Metal Ions Salt Identification

“…Carbon quantum dots (CDs) are a new class of nanomaterial discovered in 2006, with a size below 10 nm and a wide range of fascinating properties [1] CDs consist of carbon, oxygen, hydrogen, and nitrogen, and sp 2 -hybridized conjugating bonding are dominant while sp 3 -hybridized bonding is also present [2]. Because of their unique photoluminescence (PL) properties, CDs have sparked a lot of interest in the research community due to intense and tunable fluorescence around the visible range, which also contradicts the traditional view of carbon as a black material unable to emit light, and regarding its surface activity, and small size.…”

Deep learning assisted detection of toxic heavy metal ions based on visual fluorescence responses from a carbon nanoparticle array

“…The fluorescence change after the addition of metal ions to CNPs occurred due to either complexation, aggregation, inner filter effect (IFE), photo-induced electron transfer (PET), or fluorescence resonance energy transfer (FRET). 31,32 Additionally, we observed aggregation-induced precipitation for CNP ARS-Cys –Cd( ii ), CNP ARS-His –Cd( ii ), CNP ARS-Lys –Cd( ii ), CNP ARS-Trp –Cd( ii ), CNP ARS-Tyr –Cd( ii ), CNP ARS-DTT –Hg( ii ), and most of the CNP–Pb( ii ) combinations. It is also evident that IFE takes place for all the CNP–Cr( vi ) combinations.…”

Ratiometric fluorescence assay based on carbon dots and Cu2+-catalyzed oxidation ofO-phenylenediamine for the effective detection of deferasirox

“…In general, the response of CDs to common metal ions, like Fe 3+ , Ag + and Cu 2+ , is the main focus of the research on CDs in detection application. 54 Thus, the possible effects of different metal ions on CDs were also investigated. Most of the metal ions (including Cu 2+ ) posed negligible quenching effects on CDs (Fig.…”