From Cu2S nanocrystals to Cu doped CdS nanocrystals through cation exchange: controlled synthesis, optical properties and their p-type conductivity research

Liu, Jian; Zhao, Yuheng; Liu, Jialong; Wang, Shouguo; Cheng, Yan; Ji, Muwei; Zhou, Yuanmin; Xu, Meng; Hao, Weichang; Zhang, Jiatao

doi:10.1007/s40843-015-0080-z

Cited by 25 publications

(19 citation statements)

References 46 publications

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“…This contrasts with II-VI NCs, which usually exhibit ad iscrete absorption feature. [25][26][27] This uncommon phenomenonm ay be due to the speciale lectronic properties of Ag 2 SN Cs. [28,29] Figure 2A shows the photoluminescences pectra of the synthesized Ag 2 SN Cs with different indium-dopant concentrations prepared at 60 8C.…”

Section: Resultsmentioning

confidence: 99%

From Indium‐Doped Ag₂S to AgInS₂ Nanocrystals: Low‐Temperature In Situ Conversion of Colloidal Ag₂S Nanoparticles and Their NIR Fluorescence

Shang

et al. 2018

Chemistry A European J

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Focusing on ternary I-III-VI colloidal nanocrystals (NCs) synthesized with precise control of the composition (from doping to ternary composition) and NIR fluorescence performance, monodisperse binary In -doped Ag S NCs and ternary AgInS NCs have been achieved successfully by facile low-temperature in situ conversion of colloidal Ag S nanoparticles. In ions were inserted into the crystal lattice of Ag S NCs at a relatively low temperature as dopant and ternary AgInS NCs were obtained at a higher temperature following a phase transition. These doped Ag S and AgInS NCs based on different indium precursor concentrations were explored with respect to the position and intensity of the near-infrared photoluminescent emission at different doping levels and crystal phase evolution.

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Section: Resultsmentioning

confidence: 99%

From Indium‐Doped Ag₂S to AgInS₂ Nanocrystals: Low‐Temperature In Situ Conversion of Colloidal Ag₂S Nanoparticles and Their NIR Fluorescence

Shang

et al. 2018

Chemistry A European J

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“…As both the shape and size of the NCs determine the crystallographic facets exposed at the surface, these parameters can be used to control the NC's reactivity. Recently, Zhang's group [406] prepared the Cu-doped CdS NCs from Cu2S through a reverse cation exchange between Cu and Cd. In detail, the cation exchange between Cd ions and Cu2S NCs can indeed occur to obtain dominant Cu(I)-doped CdS NCs.…”

Section: +mentioning

confidence: 99%

“…In detail, the cation exchange between Cd ions and Cu2S NCs can indeed occur to obtain dominant Cu(I)-doped CdS NCs. The atomic doping of Cu(I) can be verified by the X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectroscopy [406]. Selective facet reactivity can in turn provide tunability of the physical properties of NC heterostructures through control of the spatial arrangement of their components.…”

Section: +mentioning

confidence: 99%

Understanding of the major reactions in solution synthesis of functional nanomaterials

Wang

2016

Sci. China Mater.

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This review covers the major reactions involved in the solution synthesis of nanomaterials. It was designed to classify the traditional strategies such as precipitation, reduction, seed growth, etching, and so on into two basic processes which are termed as bottom-up and top-down routines. The discussion is focused on the basic mechanism and principles during the nucleation and growth of nanocrystals, especially in the solution system. This review also presents a prediction for how to utilize these intrinsic processes to artificially construct the desired specific and functional nanostructures. We try to describe the most directive and effective way to control the structures of nanocrystals for researchers who can master the major reaction mechanism and grasp the basic technologies in synthetic nanoscience.

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“…Herein, we aim to combine the strong fluorescence and ability of reversible cation exchange of Ag doped CdS QDs (CdS:Ag QDs) to realize a dual mode anticounterfeiting for the higher security. Based on our previous research, CdS:Ag QDs have been proven to possess strong and stable doped fluorescence and no self‐quenching occurs owing to the efficient Ag doped level and large stokes shift, which makes them an excellent candidate . Moreover, the reversible cation exchange reaction in ionic nanocrystals has demonstrated to exhibit excellent morphology retention, rapid reaction rates, and low reaction temperature .…”

Section: Introductionmentioning

confidence: 99%

Hydrophilic Doped Quantum Dots “Ink” and Their Inkjet‐Printed Patterns for Dual Mode Anticounterfeiting by Reversible Cation Exchange Mechanism

Huang

et al. 2019

Adv Funct Materials

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Luminescent quantum dots (QDs) patterns have attracted great attention in anticounterfeiting applications because they can emit fluorescence upon excitation. Here, different from traditional luminescent patterns for anticounterfeiting purposes, a novel strategy based on the reversible cation exchange enabled Ag doped CdS quantum dots (CdS:Ag QDs) is reported to provide a higher security for anticounterfeiting. First, the reversibility of cation exchange enabled doped QDs crystal engineering have been revealed. The switch from nonluminescence to luminescence for several cycles by such a mechanism has been achieved. Second, the hydrophilic doped QDs "ink" can be prepared by surface modification, and then flexible bulk-sized patterns can be printed on different substrates by inkjet printing technology, such as the parchment paper, PET foil, and paper currency substrates. Third, owing to the characteristic of stable crystal structure of CdS:Ag QDs, the patterns of such doped QDs on substrates can be switched by in situ cation exchange to achieve conversion of the disappearance and recovery of luminescent signals, from which a multiple dual mode anticounterfeiting verification can be provided.

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From Cu2S nanocrystals to Cu doped CdS nanocrystals through cation exchange: controlled synthesis, optical properties and their p-type conductivity research

Cited by 25 publications

References 46 publications

From Indium‐Doped Ag₂S to AgInS₂ Nanocrystals: Low‐Temperature In Situ Conversion of Colloidal Ag₂S Nanoparticles and Their NIR Fluorescence

From Indium‐Doped Ag₂S to AgInS₂ Nanocrystals: Low‐Temperature In Situ Conversion of Colloidal Ag₂S Nanoparticles and Their NIR Fluorescence

Understanding of the major reactions in solution synthesis of functional nanomaterials

Hydrophilic Doped Quantum Dots “Ink” and Their Inkjet‐Printed Patterns for Dual Mode Anticounterfeiting by Reversible Cation Exchange Mechanism

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From Cu2S nanocrystals to Cu doped CdS nanocrystals through cation exchange: controlled synthesis, optical properties and their p-type conductivity research

Cited by 25 publications

References 46 publications

From Indium‐Doped Ag2S to AgInS2 Nanocrystals: Low‐Temperature In Situ Conversion of Colloidal Ag2S Nanoparticles and Their NIR Fluorescence

From Indium‐Doped Ag2S to AgInS2 Nanocrystals: Low‐Temperature In Situ Conversion of Colloidal Ag2S Nanoparticles and Their NIR Fluorescence

Understanding of the major reactions in solution synthesis of functional nanomaterials

Hydrophilic Doped Quantum Dots “Ink” and Their Inkjet‐Printed Patterns for Dual Mode Anticounterfeiting by Reversible Cation Exchange Mechanism

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From Indium‐Doped Ag₂S to AgInS₂ Nanocrystals: Low‐Temperature In Situ Conversion of Colloidal Ag₂S Nanoparticles and Their NIR Fluorescence

From Indium‐Doped Ag₂S to AgInS₂ Nanocrystals: Low‐Temperature In Situ Conversion of Colloidal Ag₂S Nanoparticles and Their NIR Fluorescence