Synthesis of highly luminescent and photostable ZnS:Ag nanocrystals under microwave irradiation

Jian, Wenping; Zhuang, Jiaqi; Zhang, Dawei; Dai, Jie; Yang, Wensheng; Bai, Yubai

doi:10.1016/j.matchemphys.2005.11.030

Cited by 63 publications

(26 citation statements)

References 17 publications

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“…Compared with core QDs without shell (capping agents), capped QDs have larger luminescence quantum yield, due to the surface passivation of QDs. The high quantum yield (~10%) among these series of samples is close to the previously reported highest value of 10.2% for Ag:ZnS QDs (Jian, 2006), but much higher than 4.5% for Mn:ZnS QDs (Bol, 2001). …”

Section: Photoluminescence Quantum Yields (Qys) Of Zns Qdssupporting

confidence: 88%

Next Generation Neutron Scintillators Based on Semiconductor Nanostructures

Wang¹

2008

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Section: Photoluminescence Quantum Yields (Qys) Of Zns Qdssupporting

confidence: 88%

Next Generation Neutron Scintillators Based on Semiconductor Nanostructures

Wang¹

2008

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“…In contrast to the wurtzite phased II-VI group QDs obtained by using other known cation exchange strategies, [5,17] zinc-blende phased II-VI QDs were preferred by applying the novel cation exchange strategy described herein. [24] In contrast, as shown in Figure 4C,i nt he as-prepared ZnS:Ag QDs here,the dominant and strongest room-temperature PL emission peak appears at 600 nm, without Svacancy induced emission. Most importantly,b enefitting from the thiol and solvent coordination, the controlled residual Ag + in deep positions could act as the effective doping in the resulting ZnS QDs matrix.…”

mentioning

confidence: 71%

“…[23] In addition, Ag + doping of ZnS QDs can lead to the luminescence red-shifting to 450-510 nm. [24] In contrast, as shown in Figure 4C,i nt he as-prepared ZnS:Ag QDs here,the dominant and strongest room-temperature PL emission peak appears at 600 nm, without Svacancy induced emission. This dominant red-color fluorescence could be mainly attributed to the efficient Ag + doping induced by the novel cation exchange process.T hiol ligand initialization and solvent coordination can promote the exchange process, which leads to the controllable dopant concentration and the blue shift of the absorption band edge after cation exchange (see Figure S4).…”

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confidence: 71%

Semiconductor Nanocrystal Engineering by Applying Thiol‐ and Solvent‐Coordinated Cation Exchange Kinetics

Bai

et al. 2019

Angewandte Chemie

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Thiol-and solvent-coordinated cation exchange kinetics have been applied to engineer the composition and crystallinity of novel nanocrystals.The detailed thermodynamics and kinetics of the reactions were explored by NMR spectroscopy, time-dependent photoluminescence (PL) characterizations and theoretical simulations.The fine structure of the colloidal semiconductor nanocrystals (CSNCs) was investigated by X-rayabsorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS). In this way,h igh-quality p-type Ag-doped ZnS quantum dots (QDs) and Au@ZnS hetero-nanocrystals with acubic phase ZnS shell were synthesized successfully.The unprecedented dominant Ag + -dopant-induced fluorescence and p-type conductivity in the zinc-blende ZnS are reported.

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“…Zhao et al 2013;Ding et al 2014;Lima et al 2014). There is a growing interest in ZnS or CdS quantum dots doped with various metal ions, including Mn (Ren and Yan 2012;Rajabi et al 2013;Gong and Fan 2014), Ag (Jian et al 2006), Cu (Geszke-Moritz et al 2012, and rare earth metals (Tiseanu et al 2003;Qu et al 2002;K. Zhang, Yu, and Sun 2013).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Copper-Doped Zinc Selenide Quantum Dots as Fluorescence Probes for Sparfloxacin

Ming

Yan

2015

Analytical Letters

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Copper-doped zinc selenide quantum dots modified with mercaptopropionic acid were prepared. The fluorescence quenching of the quantum dots was directly proportional to sparfloxacin concentration. A novel method was established to determine sparfloxacin using the copper-doped zinc selenide quantum dots as fluorescent probes. The interaction between the quantum dots and sparfloxacin was investigated by fluorescence and absorption spectroscopies. A linear relationship was obtained between the quenched fluorescence and sparfloxacin concentration from 1 × 10 À6 to 1.8 × 10 À5 moles per liter in KH 2 PO 4 -Na 2 HPO 4 buffer at pH 7.5 using copper-doped zinc selenide quantum dots at 2.9 × 10 À6 moles per liter. The limit of detection for sparfloxacin was 2.4 × 10 À9 moles per liter. The method was used for the determination of sparfloxacin in tablets and water with satisfactory results.

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Synthesis of highly luminescent and photostable ZnS:Ag nanocrystals under microwave irradiation

Cited by 63 publications

References 17 publications

Next Generation Neutron Scintillators Based on Semiconductor Nanostructures

Next Generation Neutron Scintillators Based on Semiconductor Nanostructures

Semiconductor Nanocrystal Engineering by Applying Thiol‐ and Solvent‐Coordinated Cation Exchange Kinetics

Synthesis and Characterization of Copper-Doped Zinc Selenide Quantum Dots as Fluorescence Probes for Sparfloxacin

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