ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2021
·Vol. 413
·期 8
·2207-2215
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IF 4.157
Yin Min,Wang Yan,Gao Xuwen,Du Shichao,Cheng Yan,Yu Shuai,Zou Guizheng,Xue Fumin
We developed a near-infrared (NIR) electrochemiluminescence (ECL) immunosensor for sensitively and selectively determining carbohydrate antigen 125 (CA125) with toxic-element-free and environmental-friendly AgInS 2 /ZnS nanocrystals (NCs) as tags. The core/shell-structured AgInS 2 /ZnS NCs not only can be conveniently prepared via an aqueous synthetic procedure, but also has high photoluminescence quantum yield (PLQY) of up to 61.7%, highly monodispersed, water-soluble, and desired biological compatibility. As AgInS 2 /ZnS NCs can be oxidized via electrochemically injecting holes into their valence band at + 0.84 V, both the monodispersed AgInS 2 /ZnS NCs in solution and the surface-confined AgInS 2 /ZnS NCs immobilized in sandwich-typed immuno-complexes with CA125 as analyte can exhibit efficient oxidative-reduction ECL around 695 nm under physiological conditions with the presence of tri-n-propylamine (TPrA). The ECL intensity from the AgInS 2 /ZnS NCs immobilized in sandwich-typed immuno-complexes increases linearly and selectively with an increased concentration of CA125 from 5 × 10 −6 to 5 × 10 −3 U/mL, and limit of detection (LOD) was 1 × 10 −6 U/mL (S/ N = 3). This reliable platform can provide an effective detection method in the early diagnosis and treatment of ovarian cancer. Graphical abstract
研究领域:
生物医学工程
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免疫分析
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纳米材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Suiying Dong,Ying Yang,Amir Zada,Shu-yuan Liu,Kezhen Qi
AgInS 2 quantum dots and ZnS photocatalytic materials were prepared using low temperature liquid phase and solvothermal methods, followed by the formation of their composites (AgInS 2 /ZnS) of different proportions with the aid of grinding method. The catalysts were characterized by various morphological and structural analyses such as scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectroscopy (UV-DRS) and fluorescence spectroscopy (PL), etc. The experimental results show that the optical characteristics of ZnS can be improved by loading AgInS 2 . To evaluate the performance of the catalysts, tetracycline was selected as the target toxin, and its degradation was evaluated with AgInS 2 /ZnS materials. The results show that when the amount of AgInS 2 was 5%, AgInS 2 /ZnS exhibited the most excellent degradation performance. Under the irradiation of the simulated solar light, the catalyst removed 46% of tetracycline (40 mg·L −1 ) in 120 min. Compared with the bare ZnS, the degradation rate of AgInS 2 /ZnS composite was significantly improved. The mechanism of tetracycline degradation by composites was verified through the experiments of energy band structure analysis, active species capture, photocurrent and electrochemical impedance and photoluminescence. The effects of pH and common interfering ions on the degradation of the antibiotic were also explored. The ecological risk of the photocatalytic degradation of tetracycline by composites was predicted. Generally speaking, the prepared AgInS 2 /ZnS material showed excellent photocatalytic degradation performance, and it is a new catalyst with great potential.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Lubricants
·
2023
·Vol. 11
·期 7
·280
·
IF 3.5
Yiping Sun,Cheng Jiang,Qin Zhao,Xiaobo Wang,Wenjing Lou
The content of Cu2+in lubricants is an essential indicator for determining the quality of the lubricant and predicting mechanical failure. Finding an effective and sensitive method for detecting Cu2+in lubricants is of great importance in oil monitoring. In this work, AgInS2(AIS) and AgInS2-ZnS (ZAIS) nanoparticles (NPs) were synthesized by a simple one-step approach via in-situ surface modification by oleylamine. The as-synthesized AIS and ZAIS NPs exhibit good dispersion stability in various apolar media. The photoluminescence (PL) of AIS and ZAIS NPs as lubricating additives could reflect and monitor the lubrication state of steel-copper pairs due to the quenching effect of Cu2+from the friction process. With an optimum concentration of 0.5 wt% in paraffin oil, the friction coefficient of the AIS and ZAIS NPs at 100 N was decreased by 56.8 and 52.1% for steel-steel contacts, respectively. ZAIS was observed to be more effective than AIS in improving anti-wear (AW) and extreme pressure (EP) properties, with a load-bearing capacity of up to 1100 N. Characterization of the wear tracks by SEM and XPS indicates that a tribofilm composed of metal sulfides and oxides was formed during the lubricating process. This work not only reveals AIS and ZAIS NPs as a new class of promising candidates for lubricating additives but also unveils their potential for monitoring lubricant conditions and exploring lubricant service life.Keywords:AgInS2;AgInS2-ZnS;lubricant additive;friction and wear;photoluminescence
研究领域:
材料科学
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2013
·Vol. 1
·期 33
·4160-4165
·
IF 0
Wei-Wei Xiong,Guo-Hai Yang,Xing-Cai Wu,Jun-Jie Zhu
Low-toxicity, highly luminescent, and water-soluble AgInS2/ZnS nanocrystals (NCs) have been synthesized via a microwave-assisted approach. The structure and optical features of the AgInS2/ZnS NCs were characterized by X-ray diffraction, high resolution transmission electron microscopy, Fourier transform infrared spectroscopy, ultraviolet visible absorption spectroscopy and photoluminescence (PL) spectroscopy. The as-synthesized AgInS2/ZnS NCs exhibited high PL quantum yields (40%) and long PL lifetimes (424.5 ns). Furthermore, the dynamic changes of the intracellular copper(II) levels in HeLa cells were monitored using the AgInS2/ZnS NCs as fluorescent probes. The results showed that the AgInS2/ZnS NCs as promising fluorescent probes can be used in the detection of intracellular copper ions in living cells.
研究领域:
纳米生物学
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分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Danlu Su,Le Wang,Min Li,Shiliang Mei,Xian Wei,Hanqing Dai,Zhe Hu,Fengxian Xie,Ruiqian Guo
Ternary Ⅰ-Ⅲ-Ⅵ quantum dots (QDs) have become promising color-conversion materials for warm white light-emitting diodes (WLEDs) because of their broad emission, large stokes shift, high luminescence and low-toxicity. In this work, AgInS 2 /ZnS (AIS/ZnS) core/shell QDs were synthesized via a facile microwave-assisted aqueous method. The PL emission can be tuned from 540 to 622 nm by varying the Ag/In ratio and the maximum quantum yield can reach 58.27%. Flexible luminescent films were obtained by embedding AIS/ZnS QDs in polyacrylamide hydrogel, which were combined with blue InGaN chips to fabricate remote-type warm WLEDs. The as-prepared LEDs exhibit a relatively high color rendering index (CRI) of 87.5 and a correlated color temperature (CCT) of 3669 K, indicating that water-soluble AIS/ZnS QDs are competitive color-conversion materials for warm WLEDs.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2015
·
IF 4.772
Xiaojiao Kang,Lijian Huang,Yanchun Yang,Daocheng Pan
Approximately 3 g of water-soluble AgInS2/ZnS core/shell quantum dots (AIS/ZnS QDs) with a maximum photoluminescence quantum yield of up to 39.1% was synthesized in an aqueous solution of gelatin and thioglycolic acid (TGA). The composition of the AIS QDs could be readily adjusted by controlling the molar ratio of the starting Ag/In precursors in the reaction solution, which leads to a tunable emission ranging from 535 to 607 nm. The as-prepared core/shell QDs exhibit excellent photostability and water/buffer stability. More importantly, these cadmium-free hydrophilic AIS/ZnS core/shell QDs are biocompatible and can be directly utilized in cancer cell imaging.
研究领域:
材料科学
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生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physics Communications
·
2020
·Vol. 4
·期 4
·045016
·
IF 0
Jiahu Wei,Feng Li,Chun Chang,Qin Zhang
Indium-rich environmentally-friendly quantum dots (QDs) have received widespread attention due to the absence of cadmium. In this paper, AgInS2 (AIS) QDs are synthesized by hot injection method. By adjusting the ratio of indium/silver (In/Ag = 1, 2, 3, 4, 5), the AIS QDs exhibit a blue shift from 868 nm to 603 nm with the indium composition increases. Therein, the AIS QDs with the ratio of In/Ag = 4 show a highest photoluminescent (PL) quantum yields (QYs) up to 57%. AIS QDs are coated with ZnS shell to passivate the surface defects, and the PL QYs of obtained core/shell AIS/ZnS QDs is increased to 72%. By using these AIS/ZnS QDs as light emitters, light emitting diodes are assembled with a stacked multi-layer structure ITO/PEDOT:PSS/Poly-TPD/QDs/ZnO:Mg/Al. The resulted electroluminescent (EL) device exhibits a maximum external quantum efficiency (EQE) of 1.25% and an open circuit voltage of 4.6 V corresponding to a maximum brightness of 1120 cd m−2. Although the performances of the as fabricated AIS/ZnS-based device lag much behind than those of the Cd-based ones, they are expected to be enhanced with much more studies on the synthesis of the QDs and the optimization of device structure.
研究领域:
材料科学
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纳米技术
·
光电
✓ 已验证
产品关联
DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zecheng Cao,Xiaojiao Kang,Wei Lü,Weiliang Guan
In this study, we present a novel synthesis system for AgInS 2 /ZnS (AIS/ZnS) core/shell quantum dots (QDs) terminated with carboxymethyl chitosan (CMC) as a ligand, which has not been previously documented. By varying the Ag/In ratio, we achieved emission wavelengths ranging from 590 to 697 nm, with the maximum photoluminescence quantum yield (PLQY) of 33.1 %. The synthesized AIS/ZnS QDs powder was mixed with YAG phosphor and combined with a blue gallium nitride (GaN) chip to produce a warm white light-emitting diode (WLED), resulting in the color rendering index (CRI) increase from 74 to 82 and the correlated color temperature (CCT) decrease from 6486 K to 3873 K. Additionally, the AIS/ZnS QDs powder can be directly utilized with a blue GaN chip to create a near-infrared light-emitting diode (NIR-LED) capable of night vision. By adjusting the concentration of CMC in the AIS/ZnS QDs solution, the material can be directly used for writing and screen printing, or dried to obtain a highly transparent and luminescent flexible composite film. This research demonstrates the significant potential of CMC-ligated AIS/ZnS core/shell QDs in display technologies and flexible device applications.
研究领域:
材料科学
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光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2016
·
IF 1.86
Min Lu,Xue Bai,Yijun Lin,Changyin Ji,Hua Wu,Cheng Ruan,Wenzhu Gao,Yiding Wang,Qiaoling Du
We here report a warm white light-emitting diode (WLED) by employing the red-emitting liquid layer of AgInS 2 /ZnS quantum dots (QDs) over the yellow-emitting YAG:Ce phosphor-based WLEDs. Compared to the commercial WLEDs, our liquid-type QD-WLEDs exhibit a color temperature of 3500 K and an improved color rendering index of 85. In addition, the experimental results indicate that the liquid structure warm white light device has a higher luminous efficiency of 72.1 lm/W and a better color stability against the extended working time in comparison to the solid-type QD-WLEDs.
研究领域:
光电子学
·
材料科学
·
纳米技术
·
固态照明
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Xiaojiao Kang,Yanchun Yang,Lan Wang,Song Wei,Daocheng Pan
Cadmium-free and water-soluble AgInS2/ZnS core/shell quantum dots (QDs) with a cost of 2.5 $/g are synthesized in an electric pressure cooker. The QD powders with different Ag/In ratios exhibit bright yellow, orange, and orange-red luminescence under UV light. Their absolute photoluminescence quantum yields (PLQYs) can reach as high as 50.5, 57, and 52%, respectively. Because gelatin is used as the capping agent, the concentrated QDs/gelatin solution can be directly utilized as phosphor for the fabrication of white light-emitting diodes (LEDs) by a simple drop-drying process without the need of resin package. Warm-white LEDs are obtained by combining orange-emitting QDs with blue InGaN chip. As-fabricated warm-white LED exhibits a luminous efficacy of 39.85 lm/W, a correlated color temperature (CCT) of 2634 K and a color rendering index (CRI) of 71 at a drive current of 20 mA. Furthermore, the electroluminescence (EL) stability of LED device and thermal stability of as-prepared QDs are evaluated.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2026
·
IF 4.2
Jie Chen,Lijiao Sun,Xiaoyun Pu,Kezhen Qi,Ya Yan
Water-soluble ZnS-coated AgInS 2 quantum dots (AIS/ZnS QDs) were synthesized via a one-pot aqueous method, and their crystal structure, surface composition, morphology and optical properties were systematically characterized. Based on the fluorescence quenching effect of AIS/ZnS QDs toward oxytetracycline (OTC), a fluorescence spectrophotometric method was established for OTC detection in milk. Under optimal conditions (QDs preparation at pH 5.5, detection temperature of 20 °C, and detection concentration of 0.160 g/L, with a 25 min reaction time), the relative fluorescence quenching degree (ΔF/F 0 ) showed a good linear correlation with logC (OTC concentration), with a linear equation of ΔF/F 0 = 0.2933 logC + 2.3388 (R 2 = 0.9984), a linear range of 1.22 × 10 -8 to 2.5 × 10 -5 mol/L and a detection limit of 1.82 × 10 -9 mol/L. The spiked recoveries of OTC in milk were 96.9%-107.1%. Furthermore, the possible quenching mechanism was proposed. This work offers insights into AIS-based functional material synthesis and expands their applications in fluorescence analysis.
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2016
·Vol. 18
·期 46
·31634-31639
·
IF 4.449
Lan Wang,Xiaojiao Kang,Daocheng Pan
Flexible luminescent materials, with the advantages of foldability and crack resistance, have attracted extensive interest owing to their broad application in collapsible optoelectronic devices. In this work, highly luminescent water-soluble green and red AgInS2/ZnS core/shell quantum dots (QDs) are synthesized in an electric pressure cooker. Luminescent and flexible films are fabricated by combining QDs with polyvinyl alcohol (PVA), and the green and red QD/PVA films show a high photoluminescence quantum yield (PLQY) of about 55% and 64% upon 460 nm excitation, respectively. Finally, the green and red QD/PVA films are successfully applied on top of a conventional blue InGaN chip for remote-type warm-white LEDs. As-fabricated warm-white LEDs exhibit a higher color rendering index (CRI) of about 90.2 and a correlated color temperature (CCT) of 3698 K.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
固态照明
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）