Detection of silver(I) ion based on mixed surfactant-adsorbed CdS quantum dots

A turn-on fluorescein spirolactam derivative as a high selective fluorescence probe for detection of silver ion(i) in water

“…The reported methods for the detection of silver include ion selective electrodes, 9,10 atomic absorption spectrometry (AAS), 11,12 inductively coupled plasma mass spectrometry (ICP-MS), 13,14 inductively coupled plasma atomic emission spectrometry (ICP-AES), 15 differential pulse anodic stripping voltammetry, 16 microextraction 17,18 as well as quantum dots. 19,20 Meanwhile, optical probes, especially the uorescence probes for metal ions have received considerable attention in recent decades due to their good selectivity, high sensitivity, low detection limits, ease of operation, cost effectiveness and large dynamic concentration range. 21 However, most of the reported uorescence probes for Ag + are "turn-off" probes, [22][23][24][25] and exhibit a quenching response upon binding with silver ions due to the special characteristics of the outer electronic structure (d10) of silver.…”

Mercaptosuccinic acid modified CdTe quantum dots as a selective fluorescence sensor for Ag+determination in aqueous solutions

“…Apart from atomic spectrometries for sensitive detection of Ag, great progress has also been achieved for Ag detection using QDs. Nowadays, the reported sensors are usually worked based on uorescence quenching [7][8][9][10][11][12][13][14][15][16] and enhancement, 9,[17][18][19][20][21][22][23] and red shi of emission wavelength 24,25 induced by Ag + , where CdS, CdSe, PbS, ZnS and CdTe QDs were employed. Among the above QDs, CdTe QDs offer several advantages, including the maturity of water synthetic techniques, especially the controllability of particle sizes and multiple choice of capping ligands.…”

“…To effectively detect Ag + in aqueous biological and environmental samples, replacing the hydrophobic capping ligands from the surface of QDs is necessary to increase the water solubility of QDs. To achieve this aim, thiol-based species such as mercaptoacetic acid, 19,22 mercaptopropionic acid, 7-9,13,14 L-cysteine, 17,18 rhodanine, 25 thioglycolic acid, 24 cysteamine, 23 mercaptoethanol 20 and thiolactic acid 15 were most widely-used capping ligands. Additionally, QDs were also modied by citrate, 11,21 iminodiacetic acid 12 and nucleic acid.…”