CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaopeng Zhou,Qingshi Hu,Yuhua Wang
Indium phosphide QDs have emerged as a promising candidate for the next generation optoelectronic applications. However, the optical performance of InP QDs still lags behind that of CdSe-based QDs, partly due to surface traps induced by the lattice mismatch between InP and ZnSe. Herein, based on (DMA) 3 P, we designed an alloyed inner-shell structure of InP/Zn(Mg)Se/ZnS QDs. The dual-function mechanism of the Zn(Mg)Se was revealed, which effectively mitigates the lattice mismatch between the core and shell to reduce the emission of surface defect states, resulting in narrowed emission peaks (FWHM ∼ 36 nm). While the increased band gap of Zn(Mg)Se confines the exciton delocalization from core to shell, thereby reducing the non-radiative relaxation of carriers at the defect states in the shell. This discovery provides a strategy to improve the color purity and luminescence efficiency of InP QDs. By combining blue LED chips with InP/Zn(Mg)Se/ZnS, a white light-emitting diode (QLED) with a high luminous efficiency of 63 lm/W was obtained. Furthermore, the realization of QDs arrays with 10 μm pixel dots by inkjet printing technology and the fabrication of white-light emitting Micro-LEDs by combining QDs films with Micro-LED chip arrays demonstrate the potential application of InP QDs in high-efficiency optoelectronic devices (LEDs/micro-LEDs).
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
Chemosensors
·
2025
·Vol. 13
·期 4
·141
·
IF 3.7
Puye Liang,Sihan Liu,Qinqing Han,Kaixuan Zhou,Tiange Li,Xianqing Huang,Lianjun Song,Tianlin Wang
Aflatoxin B1(AFB1) exhibits high toxicity and has the potential to induce cancer, deformities, and mutations. It is therefore highly desirable that sensitive and straightforward methods for detecting AFB1be developed. In this study, due to the high specific adsorption capacity of AFB1aptamers, we applied a sensing strategy based on quantum dots (QDs) and carboxyl-functionalized graphene oxide (FGO) to construct a simple fluorescence quenching platform. FGO and CdTe QDs modified with AFB1aptamers cause a FRET effect that produces CdTe QDs with yellow-green fluorescence quenching. When AFB1is present, aptamers form complexes with it and CdTe QDs leave the quenching platform, resulting in fluorescence recovery. In this study, we used a fluorescence aptasensor with a wide detection range of 0.05 to 150 ng/mL and a low limit of detection (LOD) of 8.2 pg/mL. The average recoveries of AFB1in peanut and pure milk samples ranged from 94.5% to 107.0%. The aptasensor also exhibited the advantages of simple operation, low cost, and good stability. The sensing strategy reported here can thus serve as a potential candidate for the rapid detection of AFB1.
研究领域:
食品安全
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生物传感
·
毒理学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Wei Wang,Zixun Li,Peizheng Ni,Xiaoji Zhou,Yongfu Guo,Shusu Shen
Covalent triazine frameworks (CTFs), a subclass of covalent organic frameworks (COFs) based on triazine units, possess a high specific surface area and excellent optoelectronic properties, making them highly suitable for constructing photocatalytic nanocomposites. In this study, a high-performance photocatalytic self-cleaning membrane was developed by incorporating WS2 quantum dot-decorated CTF-A (WS2 QDS@CTF-A) into a polyvinylidene fluoride (PVDF) matrix. The composite membrane effectively synergized the excellent optoelectronic properties of CTF-A with the strong photocatalytic activity of WS2 QDs. Under simulated sunlight, the membrane efficiently generated •OH/•O2– radicals, which drove the degradation of adsorbed dye molecules, thereby endowing it with remarkable self-cleaning and antifouling properties. The optimized membrane (QL2) exhibited superior separation performance, achieving a pure water flux of 28.27 L·m–2·h–1·bar–1 and a rejection rate exceeding 99% for Eriochrome Black T. Notably, the photocatalytic functionality ensured excellent reusability, enabling the membrane to maintain over 90% separation efficiency throughout eight filtration cycles, which underscores its potential for sustainable wastewater treatment.
研究领域:
材料科学
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环境工程
·
光催化
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膜技术
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纳米复合材料
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Huan Yang,Danyan Lin,Jie Yang,Jiahuang Qiu,Juxiao Li,Tianxin Li,Yubo Wei,Wen Yao,Xinrong Guo
Background Uranium is a vital element in energy and military applications but poses significant environmental and health risks due to its toxicity, radioactivity, and long half-life. During its use, uranium waste is released into the environment, often in the form of uranyl ions (UO 2 2+ )—the most stable and water-soluble uranium species. These ions can contaminate water sources, threatening both ecosystem safety and human health. Thus, developing rapid and sensitive methods for detecting UO 2 2+ in aquatic environments is crucial for ensuring water security and public health. Results In this study, water-phase tellurium-doped silver sulfide quantum dots (AgTe 0 . 08 S 1.67 QDs) were synthesized using a simple and rapid one-pot method. It exhibits monodisperse spherical morphology, with a uniform average particle size of 1.92 nm. Additionally, Te doping significantly improved the fluorescence performance of this material. UO 2 2+ can quickly quench the fluorescence of AgTe 0 . 08 S 1.67 QDs, with a quench time as low as 1 min. The quenching mechanism is primarily attributed to the synergistic effects of electrostatic interaction and electron transfer. Meanwhile, Te doping provided binding sites and increased the electron transfer efficiency from the O and N atoms of AgTe 0 . 08 S 1.67 QDs to the UO 2 2+ . Using this QDs as a fluorescent probe to detect UO 2 2+ , the detection limit was 3.65 nM, which is better than most fluorescent probes reported in the literature. Significance A new fluorescence sensor based on AgTe 0 . 08 S 1.67 QDs was successfully developed and used to rapidly detect UO 2 2+ with high sensitivity. This method was also successfully applied to detect UO 2 2+ in lake water, river water and seawater, offering a new approach for the rapid detection of uranium pollutants in environmental water.
研究领域:
环境科学
·
分析化学
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纳米技术
·
荧光光谱学
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DOI
PubMed
高影响因子
Nano-Micro Letters
·
2024
·Vol. 16
·期 1
·1-16
·
IF 31.6
Wang Wenxiao,Wang Yaqi,Yin Feifei,Niu Hongsen,Shin Young-Kee,Li Yang,Kim Eun-Seong,Kim Nam-Young
An optoelectronic memristor with bioinspired neuromorphic behavior was proposed based on Ag/TiO 2 Nanowires: ZnO QDs/FTO.
The proposed device establishes superior long/short-term synaptic plasticity in response to electrical and light stimuli, and a neuromorphic computing task is effectively implemented based on its optoelectronic performance.
The device emulated complex biological associative learning behaviors, including the four features of acquisition, extinction, restoration, and generalization.
研究领域:
材料科学
·
神经科学
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光电技术
✓ 已验证
DOI
PubMed
高影响因子
Food Science and Human Wellness
·
2017
·
IF 0
Chi-Fang Peng,Ying-Ying Zhang,Zhi-Juan Qian,Zheng-Jun Xie
In this work, glutathione capped CdTe QDs (GSH-QDs) were prepared through a one-pot process and found to be quenched by Cr 3+ , Ag + and Cu 2+ ions. Cr 3+ and chromium (III) picolinate could be quantitatively measured after masking Cu 2+ and Ag + ions by sulfide. Under optimal conditions, linear quenching was observed for Cr 3+ in the ranges of 0–2.0 μM and the limit of detection was 3.0 nM. The recoveries for Cr 3+ in vitamin supplements obtained were from 92.5% to 106%. The determination results of chromium (III) picolinate in vitamin supplement samples were compared to that obtained using flame atomic absorption spectrometry (FAAS) method, and the result showed good reliability.
研究领域:
分析化学
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环境科学
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生物医学
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产品关联
DOI
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2018
·
IF 3.997
Miao Zhao,Ying Chen,Rongcheng Han,Dan Luo,Libo Du,Qiang Zheng,Lijun Wang,Yuankai Hong,Yang Liu,Yinlin Sha
We here report a facile synthesis of chitosan shelled quantum dot (QD/fGC) that holds essential properties requisite for biological applications, such as excellent water solubility, super colloidal stability, and low nonspecific adsorption as well as ease of functionalization. In this method, the amphiphilic glycol chitosan fragment (MW 1.0–1.7 kDa) was assembled on the top of CdSeS/ZnS nanocrystal through hydrophobic interaction in aqueous solution, without displacing the native coordinating ligands, which result in a higher quantum yield of about 0.26, 46% of the uncoated CdSeS/ZnS QDs in chloroform (0.57). In addition, the prepared QD/fGC composes an individual semiconductor core and presents an extremely small size of about 6.03 ± 1.50 nm (n = 399) in diameter. By conjugation with bioactive amines via 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC)-based hydroxyl activation approach, the functionalized QD/fGC presented excellent recognition of specific cells in fluorescent imaging. Our work provides a new general method of chitosan modification of hydrophobic nanoparticles for biomedical applications.
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2019
·Vol. 411
·期 21
·5437-5444
·
IF 3.286
Jiao Xiangyu,Zhou Yabin,Zhao Dan,Pang Duo,Wang Changtao,Du Hongwu,Wen Yongqiang,Zhang Xueji
To meet the need for high-throughput immunoassays, many multiplex fluorescent immunoassays have been proposed. Most of them need different kinds of fluorescent label indicators during the test. In this work, a novel indirect ELISA-inspired dual-channel fluorescent immunoassay based on 3-mercaptopropionic acid capped CdTe/ZnS quantum dots (QDs) was constructed. The ELISA wells were coated with two kinds of antigen–QD complex. When the primary antibodies were present in a sample, they mediated the binding of a secondary antibody–DNA–gold nanoparticle complex to the antigen–QD complex. Then the gold nanoparticles quenched the fluorescence of the QDs and a decrease in fluorescence intensity was observed. Thus, the amount of primary antibody could be estimated from the decrease of fluorescence intensity. Owing to the wide absorption range and the relatively narrow emission band of the QDs, the dual-channel fluorescent immunoassay system could work at the same excitation wavelength and the emission wavelengths of each channel had no interference. As a result, two different kinds of primary antibody could be detected at the same time in one ELISA well, which simplified the operation and greatly improved the efficiency. Besides, only one type of secondary antibody needs to be added to the prepared microtiter plates, which further simplified the operation during the detection procedure. This dual-channel fluorescent immunoassay system will provide new insights into high-throughput immunodetection.
Graphical abstract
研究领域:
生物化学
·
分析化学
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纳米技术
·
免疫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANO
·
2018
·
IF 1.1
Bo Hu,Yang Lu,Keyu Cui,Yongsheng Yan
In this study, a novel imprinted polymer based on 3-aminophenylboronic acid (APBA)-functionalized CdTe quantum dots (QDs) was synthesized and used to sensitively and selectively detect glucose. In the process of synthesis, the boronic acid in the APBA could combine covalently with vicinal diol compounds, directing imprinting process, and the APBA-modified CdTe QDs were used as the solid supports. By this method, the prepared molecular imprinting polymers (MIPs)-APBA/CdTe QDs show high selectivity, high sensitivity and good stability. Under optimal conditions, a linear relationship was obtained covering the linear range of 0–1.5 mmol/L with a correlation coefficient of 0.99833 and a high imprinting factor about 5.71. Furthermore, the prepared MIPs-APBA/CdTe QDs were successfully applied to detect glucose in human serum samples. This work provides a new way to synthesize an excellent stability and efficient imprinted polymer based on CdTe QDs for convenient, fast and highly selective detection of glucose.
研究领域:
生物化学
·
分析化学
·
纳米医学
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产品关联
DOI
高影响因子
Applied Physics Reviews
·
2024
·Vol. 11
·期 3
·
IF 11.9
Wang Jindi,Li Mingyang,Fan Wenxuan,Xu Leimeng,Yao Jisong,Wang Shalong,Song Jizhong
Perovskite quantum dot-based light-emitting diodes (QLEDs) have been considered as a promising luminescent technology due to high color purity and wide color gamut. However, the realization of high-performance QLED is still hindered by near-perfect quantum dots (QDs) with efficient and stable exciton recombination behavior. Here, we proposed a ligand compensation (LC) strategy to optimize the QDs by introducing a ligand pair of tri-n-octylphosphine (TOP) and CsBr. The ligand pair could enhance the clarity and colloidal stability of the QD ink, facilitating the fabrication of highly smooth films. On one hand, TOP engages in interactions with Pb and effectively passivates the surface uncoordinated Pb 2+ . On the other hand, the supplement of CsBr provides a Br-rich environment to reduce Br vacancies (V Br ). Through LC, QD films possess a high photoluminescence quantum efficiency of 82% and a shallow hole level, which enables efficient exciton recombination. In addition, the LC makes QD films exhibit stable exciton combination behavior and electrical transport characteristics. Resultantly, the LC-optimized QLEDs show a maximum external quantum efficiency (EQE) of 24.7% and an operational lifetime T 50 of 182 h at an initial luminance of 100 cd m −2 , which is obviously higher than that of the control device (EQE of 15.8%, T 50 of 11 h). The proposed LC strategy for optimizing perovskite QDs presents a novel concept for achieving high-performance QLEDs and holds great potential for widespread application in various optoelectronics.
研究领域:
材料科学
·
光电技术
·
纳米技术
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产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2014
·
IF 1.968
Yan Liang,Jiawei Tan,Jiexin Wang,Jianfeng Chen,Baochang Sun,Lei Shao
Erythorbic acid assistant synthesis of CdS quantum dots (QDs) was conducted by homogeneous mixing of two continuous liquids in a high-throughput microporous tube-in-tube micro-channel reactor (MTMCR) at room temperature. The effects of the micropore size of the MTMCR, liquid flow rate, mixing time and reactant concentration on the size and size distribution of CdS QDs were investigated. It was found that the size and size distribution of CdS QDs could be tuned in the MTMCR. A combination of erythorbic acid promoted formation technique with the MTMCR may be a promising pathway for controllable mass production of QDs.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Guobin Mao,Wenquan Peng,Songbai Tian,Jiao Zheng,Xinghu Ji,Zhike He
Herein, we developed a simple and sensitive method for the detection of protamine and trypsin by using a ratiometric fluorescent probe based on Rox-DNA functionalized CdZnTeS quantum dots (QDs). The Rox-DNA functionalized CdZnTeS QDs were prepared via one-pot method, which was simple, low-cost, and modification-free. Protamine can cause the aggregation of ratiometric fluorescent probe through electrostatic interaction and quench the fluorescence of CdZnTeS QDs. Then, the protamine could be hydrolyzed to small peptides by trypsin and the fluorescence of QDs was recovered. However, the fluorescence of Rox kept unchanged. The fluorescence intensity ratio was proportional to the concentration of protamine or trypsin. A good linear relationship (25–300 ng/mL for protamine and 2.5–50 ng/mL for trypsin) with low limit of detection (4.73 ng/mL for protamine and 0.87 ng/mL for trypsin) was obtained. Meanwhile, we observed different colors by the naked eye after the addition of different concentrations of protamine and trypsin, and the minimum detectable concentration was as low as 4 μg/mL for protamine and 40 ng/mL for trypsin, respectively. In addition, the ratiometric fluorescent probe exhibited good analytical performance in complex biological matrix. Therefore, the ratiometric fluorescent probe can be proposed as a simple and effective tool for the detection and visualization of dual proteins.
研究领域:
分析化学
·
生物化学
·
荧光光谱
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）