Visual and sensitive fluorescent sensing for ultratrace mercury ions by perovskite quantum dots

Lu, Liqiang; Tian, Tan; Xia, Tian; Li, Yong; Pan, Deng

doi:10.1016/j.aca.2017.07.014

Cited by 80 publications

(57 citation statements)

References 36 publications

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“…5 More recently, metal halide perovskites, which demonstrate attractive opto-electronic properties for photovoltaic applications, 24 have also been tested as sensing materials. In this case, reversible variations of their uorescence, phosphorescence or chemical resistivity upon applying an external stimulus due to intercalation processes, surface absorption, trap passivation or ion exchange have been reported and used for temperature, 25 humidity, 26-28 gas [29][30][31][32][33][34][35][36] and metal ion [37][38][39] sensing.…”

Section: A Introductionmentioning

confidence: 99%

“…35 Despite the large variety of colloidal synthesis procedures for nanomaterials of high crystallinity quality and nely tuned size, shape, and composition, [40][41][42][43][44][45] only a few examples have been reported for sensing applications by using such materials. Among them, nanostructured metal halide materials have been used for sensing metal ions (copper or mercury), 37,39 gases (hydrochloric acid or oxygen) 33,34 and humidity. 26 According to our knowledge there is no sensor based on metal halide nanostructures for ozone gas sensing.…”

Section: A Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ligand-free all-inorganic metal halide nanocubes for fast, ultra-sensitive and self-powered ozone sensors

et al. 2019

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Section: A Introductionmentioning

confidence: 99%

Section: A Introductionmentioning

confidence: 99%

Ligand-free all-inorganic metal halide nanocubes for fast, ultra-sensitive and self-powered ozone sensors

et al. 2019

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“…On the other hand, Du et al [13] speculated that Hg 2+ could quench the fluorescence of Cu 2 S QDs mainly via electron transfer with cation exchange and aggregate-induced quenching, which had the similar phenomena with Cu 2+ quenching. And Lu's research also proved the same mechanism [14]. Fig.…”

Section: Resultsmentioning

confidence: 67%

Fluorescent ZnCdSe/ZnS QDs probes for sensitive copper (II) detection

Qin

Yue

Liu

2018

Proceedings of the 2018 7th International Conference on Energy, Environment and Sustainable Development (ICEESD 2018)

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Considering the fact that copper (II) (Cu 2+) act as a dietary need but toxic metal ions, its detection and quantification is very much important for human healthy diet and environmental risk assessment. Herein, we introduced a sensitive fluorescence sensor for the detection of Cu 2+ based on ZnCdSe/ZnS QDs, whose fluorescence quenching was well linear with Cu 2+ concentration. And a detection limit as low as 5 nM was obtained. Moreover, the recovery experiment was performed and the satisfactory recovery rate was obtained. The results indicated that the proposed ZnCdSe/ZnS QDs probes possessed a good performance for the detection of Cu 2+. Therefore, a effective fluorescence sensor was developed for the detection of Cu 2+ at a sensitive level.

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“…Targeting on heavy metal ions, Lu et al proposed a fluorescence nanosensor using MAPbBr 3 perovskite quantum dots for detecting Hg 2+ via surface ion‐exchange, which could result in PL quenching. [ 150 ] Later, Liu et al reported a fluorescent probe for selective detection of Cu 2+ in hexane based on inorganic CsPbBr 3 perovskite quantum dots via electron transfer to Cu 2+ . [ 151 ] Within seconds, the PL intensity of CsPbBr 3 PQDs was significantly quenched by Cu 2+ , and the sensor showed a detection range from 0 × 10 −9 to 100 × 10 −9 m with a limit of detection as low as 0.1 × 10 −9 m , indicating significant potential for practical applications.…”

Section: Other Sensing or Detecting Applicationsmentioning

confidence: 99%

Miscellaneous and Perspicacious: Hybrid Halide Perovskite Materials Based Photodetectors and Sensors

Tsao

Zhang

et al. 2020

Advanced Optical Materials

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abbreviated as AMX 3 (A is an organic cation, e.g., CH 3 NH 3 + , HN=CHNH 3 + ; M is a metal cation, e.g., Sn 2+ , Pb 2+ ; X is a halide anion, e.g., Cl − , Br − , I −). In their crystal framework, corner-sharing BX 6 octahedrons form the 3D network with the A cations situated in the cuboctahedral interstices. [4,5] The inorganic components of the halide perovskite provide the conductive backbones required by the carrier's ordered transmission and also provide the thermal and mechanical stability of the material. The organic components, on the other hand, function as templates via hydrogen bonds during the perovskite film formation process. Different from 3D perovskites, layer-structured 2D perovskite materials follow the (RNH 3) 2 (A 3) n-1 M n X 3n+1 structure, where R is an alkyl or aromatic moiety larger than A, and n is the number of inorganic layers between the organic chains. [6,7] When n→∞, the structure converts to 3D perovskite. When n is a limited integer, quantum well structures form with layers of AX 4 2− separated and supported by a layer of organic cations via weak van der Waals forces. The inorganic components provide high carrier mobility and wide bandgap tunability. The organic components, being either large aliphatic or aromatic ammonium cations, can enhance hydrophobicity by preventing water molecules from penetrating and destroying the inorganic layers. Thus 2D perovskites usually demonstrate improved environmental stability against moisture. [8-10] Importantly, 2D perovskite crystals also showed unique optical properties such as deep blue emission and strong excitonic effect due to the strong quantum well effect. [11] Furthermore, targeting on the instability issue of hybrid perovskites under high-temperature and humid environments, scientists prompted all-inorganic perovskites (e.g., CsPbX 3) by replacing the organic component with inorganic ions. [12] Besides the rapid development of perovskite-based photovoltaics, [13-16] other perovskite-related devices including lightemitting diodes (LED), [17-20] laser, [21-23] transistors, [24] thermoelectric generators, [25] photodetectors for UV-NIR photons, [26-29] and various sensors for gas, chemical, and pressure have been widely studied. [30-33] Among all these potential applications, detectors and sensors became very active areas of research and even the third-largest application behind photovoltaics and LEDs (Figure 1). This trend could, again, be attributed to the favorable intrinsic properties of hybrid halide perovskites such as direct and tunable bandgaps with significant absorption coefficients, ultralong charge carrier lifetimes/diffusion lengths, high carrier mobilities, low charge carrier recombination, broad Optoelectronic devices based on perovskite materials have shown significant improvement due to the direct and tunable bandgaps, large absorption coefficients, broad absorption spectra, high carrier mobilities, and long carrier diffusion lengths. In addition to the excellent performance in solar cells, scientists have utilized per...

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Visual and sensitive fluorescent sensing for ultratrace mercury ions by perovskite quantum dots

Cited by 80 publications

References 36 publications

Ligand-free all-inorganic metal halide nanocubes for fast, ultra-sensitive and self-powered ozone sensors

Ligand-free all-inorganic metal halide nanocubes for fast, ultra-sensitive and self-powered ozone sensors

Fluorescent ZnCdSe/ZnS QDs probes for sensitive copper (II) detection

Miscellaneous and Perspicacious: Hybrid Halide Perovskite Materials Based Photodetectors and Sensors

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