Journal of Materials Chemistry C
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2025
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IF 5.1
Tingjie Jiang,Na Yang,Ziyi Wang,Haoran Zhang,Na Li,Yongying Chen,Mingkai Wei,Xuejie Zhang,Bingfu Lei
In this study, a carbon dot-based ratiometric fluorescence (RF) probe was used as a fluorescent "on-off-on" sensor to detect Fe3+ and the pesticide amitrole (AMT). The RF probe consists of orange carbon dots (O-CDs) and blue carbon dots (B-CDs). B-CDs forms a ground-state complex with Fe3+ which leads to fluorescence quenching, while the addition of AMT restores fluorescence. Based on this "on-off-on" process, a quantitative detection of Fe3+ and AMT is achieved, showing good linearity in the range 0-50 μM and 0-30 μM. The low detection limit of Fe3+ and AMT are as low as 24 nM and 0.18 μM, respectively. In addition, fluorescent color changes are converted into RGB values by a smartphone sensing device., and the concentration of Fe3+ and AMT is determined by colorimetric analysis. The method was further applied to real samples such as lake water, tap water and urine with satisfactory results. Additionally, a portable sensor with a semi-hydrophobic film was fabricated for on-site AMT detection, showcasing practical applicability. This work provides a cost-effective, rapid, and dual-mode strategy for environmental and biological monitoring of Fe³⁺ and AMT.
研究领域:
环境监测
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分析化学
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纳米技术
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生物传感
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荧光光谱学
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DOI
高影响因子
DYES AND PIGMENTS
·
2025
·
IF 4.2
Haiyan Ma,Yinji Cui,He Gao,Ling Yan,Lan Liu,Longbin Xu
Hypochlorous acid (HClO), a key reactive oxygen species (ROS), plays a vital role in immune defense but is also implicated in the pathogenesis of inflammatory diseases. Excessive levels of HClO can cause environmental hazards by generating toxic chlorinated by-products in aquatic systems, compromising water quality and threatening both aquatic ecosystems and drinking water safety. In this study, we introduce a phenothiazine-based fluorescent probe (PHBF) engineered for rapid and selective detection of HClO. The probe exhibits an instantaneous fluorescence “turn-on” response within 5 seconds, with a detection limit of 48.54 nmol·L -1 , demonstrating its high sensitivity for real-time monitoring. For environmental applications, PHBF was integrated into an agarose gel matrix, resu-1ting in a portable gel-based sensing platform. This system enables on-site, real-time detection of HClO in water samples, utilizing smartphone-assisted RGB analysis for dual-mode fluorescence and colorimetric quantification. The RGB-based readout provides a cost-effective, user-friendly, and quantitative solution for environmental monitoring. Furthermore, the probe’s ability to image HClO in living cells confirms its biocompatibility and potential for biomedical applications. Overall, this study presents a multifunctional detection strategy for HClO, combining rapid fluorescence response, portable gel-based sensing, and smartphone-enabled RGB analysis. This approach offers a promising tool for real-time water quality assessment and biomedical research on oxidative stress.
研究领域:
分析化学
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环境科学
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生物化学
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材料科学
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生物医学工程
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DOI
高影响因子
Surfaces and Interfaces
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2024
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IF 5.7
Zhihao Liu,Tingting Yang,Yuwen Yan,Yongtao Tang,Jianxin Meng,Fengyu Li
Colorimetry is to determine the component content usually comparing or measuring the “RGB” values, which has the advantages of quick response and visual comparison. However, the widely reported “RGB” models are limited by requiring professional operation such as accurate sampling, insufficient information, cumbersome calculation, etc., which has significantly restricted the promotional application. Inspired by the PAA-PVA gel with excellent absorbing-swelling ability and superior response ability, indefinite volume addition has a significant difference in the swelling phenomenon of PAA-PVA hydrogel, the extent of this enlargement is directly related to the amount of testing sample absorbed, which can be applied to reflect testing sample volume added. In addition, benefited from a comprehensive and precise parameter network, the deep learning (DL) algorithm solves the defects such as ambient light effect and manual extract RGB values of the colorimetric sensing analysis strategy. Considering Fe(II) is an essential element for life science and environmental monitoring, we have developed a self-calibrating colorimetric sensor assisted deep learning strategy for the Fe(II) detection with indefinite volume. It can directly complete the analysis of Fe(II) concentration via captured images, without going through a complicated process similar to the RGB model. Specifically, we integrated the advantages of colorimetric sensing strategy, absorbing-swelling hydrogel, and DL algorithm to develop a phenanthroline (PHEN) indicator doped PAA-PVA colorimetric sensor (PHEN-PAA-PVA). Then, 2,500 colorimetric response images were collected as the training dataset and assessed 2 DL algorithms and 7 machine learning (ML) algorithms. The convolutional neural network (CNN) model exhibited the most efficiency to quantify 1×10 −5 -9×10 −4 mol/L Fe(II), with a limit of detection (LOD) of 3.3×10 −6 mol/L. It provides a promising and blooming in-situ detection approach for Fe(II) analysis, contributes to health management and environment monitoring.
研究领域:
分析化学
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环境科学
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深度学习
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传感器
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DOI
高影响因子
Light-Science & Applications
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2025
·Vol. 14
·期 1
·1-9
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IF 23.4
Chen Zhong,Man Zhongwei,Rao Shichao,Zhao Jinxing,Wang Shuaibing,Zhang Runtong,Teng Feng,Tang Aiwei
Recently, colloidal quantum dots (QDs) with high luminescent efficiency and tunable colors have become ideal materials for next-generation display devices. Direct photolithography is a powerful tool for patterning QD devices, but it faces the serious issue of degradation in the photophysical properties of the patterned QDs. Here, we use relatively rigid cyclopentane as a bridging group to design the crosslinker CPTA, achieving high-resolution direct photolithography of QDs with nearly nondestructive under ambient conditions. The key to the crosslinker design is the introduction of a rigid bridging group that elevates the LUMO level, providing a stronger energy barrier to prevent QD electrons from being trapped or undergoing non-radiative recombination, thus preserving their PL and EL properties. The efficient and high-resolution RGB line and dot arrays were fabricated with pixel sizes down to 1 μm and a resolution of up to 6350 PPI. The patterned RGB QD films, especially red QDs, maintained their optical and optoelectronic properties, with patterned red QLEDs achieving peak external quantum efficiency (EQE) of 21% and a maximum luminance ( L max ) of ~180,000 cd m⁻², matching pristine devices. These results highlight the importance of photo-crosslinker design for nondestructive QDs patterning, paving the way for advanced display applications in patterned QLED technology.
研究领域:
材料科学
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纳米技术
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光电子学
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显示技术
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光刻技术
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2019
·Vol. 10
·期 1
·1-9
·
IF 11.878
Liu Yang,Han Fei,Li Fushan,Zhao Yan,Chen Maosheng,Xu Zhongwei,Zheng Xin,Hu Hailong,Yao Jianmin,Guo Tailiang,Lin Wanzhen,Zheng Yuanhui,You Baogui,Liu Pai,Li Yang,Qian Lei
An ideal anti-counterfeiting technique has to be inexpensive, mass-producible, nondestructive, unclonable and convenient for authentication. Although many anti-counterfeiting technologies have been developed, very few of them fulfill all the above requirements. Here we report a non-destructive, inkjet-printable, artificial intelligence (AI)-decodable and unclonable security label. The stochastic pinning points at the three-phase contact line of the ink droplets is crucial for the successful inkjet printing of the unclonable security labels. Upon the solvent evaporation, the three-phase contact lines are pinned around the pinning points, where the quantum dots in the ink droplets deposited on, forming physically unclonable flower-like patterns. By utilizing the RGB emission quantum dots, full-color fluorescence security labels can be produced. A convenient and reliable AI-based authentication strategy is developed, allowing for the fast authentication of the covert, unclonable flower-like dot patterns with different sharpness, brightness, rotations, amplifications and the mixture of these parameters.
研究领域:
材料科学
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光学
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安全技术
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人工智能
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
·
IF 4.3
Ming-Qin He,Hong-Wei Li,Yuqing Wu
Nitrite is a commonly used food preservative and a water contaminant that has garnered significant attention due to its harmful effects on human health. Developing a simple and sensitive method for determining nitrite levels is crucial for safeguarding public health. In this paper, we present a novel ratiometric fluorescent nanosensor (CDs@UiO-66-NH 2 ), created by combining orange-red-emitting CDs with blue-emitting UiO-66-NH 2 . This ratiometric probe detects nitrite ions (NO 2 − ) based on the diazotization reaction between the amino group in UiO-66-NH 2 and the target NO 2 − , where the blue emission of UiO-66-NH 2 is quenched but the orange-red emission of CDs remains stable. The probe demonstrated a detection range of 0.5–20 μM with a limit of detection (LOD) of 0.157 μM for NO 2 − . Due to the probe’s distinct color changes in response to NO 2 − , RGB values can be easily read using a smartphone, enabling ultrasensitive visual detection of NO 2 − with an LOD of 0.76 μM. This sensor was successfully applied to detect NO 2 − in environmental water samples. Finally, a smartphone-based RGB reading method using CDs@UiO-66-NH 2 for visual quantitative detection of NO 2 − was proposed, broadening the application of CDs@UiO-66-NH 2 in environmental protection.
研究领域:
分析化学
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环境科学
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材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Advanced Science
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2024
·
IF 14.3
Ruomei Teng,Ming Li,Zikang Chen,Jianli Lin,Yuhan Zhang,Hang Li,Zejun Yan,Dingyuan Zhang,Caiping Ding,Youju Huang
Rapid and intelligent identification of prostate cancer (PCa) is critical for early diagnosis. Herein, a convenient, reliable, and intelligent strategy is proposed to screen PCa individuals through indirectly quantifying sarcosine (Sar), an early indicator of PCa, in clinical urine samples. Success is achieved by integrating sarcosine oxidase (SOX) as a specific recognition unit; nanozyme-assisted multicolor intelligent visualization platform as a signal reporter. With the Fe-MOFs and peroxidase, the synergetic action of SOX and response gold nanorods (Au NRs) is controlled etched to exhibit a multicolored signal. The sensor exhibits excellent linearity with Sar within 1–60 × 10 −6 m , boasting a remarkable detection limit of 0.12 × 10 −6 m . The RGB value of the display color can be directly extracted using a mobile phone camera. PCa diagnosis can be swiftly made (within 15 min) and directly by identifying two RGB colors ( R < 175 or B > 135). The enzyme-assisted multicolor intelligent visualization platform is adept at detecting minute differences in Sar concentration in urine samples between PCa patients and healthy individuals. The concept of enzyme-assisted multicolor sensing can be further expanded by modifying the type of immobilized enzymes, providing a valuable guideline for the rational design of multiple probes to measure specific biomarkers in biological samples.
研究领域:
生物医学工程
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分析化学
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癌症诊断
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
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2022
·
IF 7.613
Wenjing Wang,Tao Tan,Shangwei Wang,Su Zhang,Ran Pang,Da Li,Lihong Jiang,Huimin Li,Chengyu Li,Hongjie Zhang
Near-ultraviolet-pumped white light-emitting diodes (LEDs) based on the combination strategy of traditional RGB phosphors (blue/green/red) or blue/yellow phosphors have the drawback of inadequate color rendering index due to the cyan-gap (480–500 nm) in the emission spectrum . It is quite promising to find efficient cyan-emitting phosphors that can offset the cyan-gap to produce white LEDs with full-spectrum emission. In our work, we synthesized a Ce 3+ -activated ScCaO(BO 3 ) (SCB:Ce 3+ ) phosphor with a broadband blue-cyan emission. Under near-ultraviolet 396 nm excitation, the optimum SCB:0.005Ce 3+ sample shows a blue-cyan emission band with a peak of 473 nm, which is competent for filling the cyan-gap. Meanwhile, the SCB:0.005Ce 3+ blue-cyan phosphor possesses a high quantum efficiency (internal quantum efficiency = 66.5%, external quantum efficiency = 38.5%) and weak chromaticity shift (ΔE s = 1.29 × 10 −2 ). We produce white LED devices based on 395 nm LED chips and RGB or blue/yellow/red phosphors strategies. By comparing the performance parameters of white LED devices with or without blue-cyan SCB:0.005Ce 3+ phosphor, it is proved that SCB phosphor can offset the cyan gap of commercial RGB phosphors and the cyan emission lack of commercial Y 3 Al 5 O 12 :Ce 3+ phosphor. Furthermore, SCB:0.005Ce 3+ phosphor can substitute for commercial BaMgAl 10 O 17 :Eu 2+ phosphor in RGB or blue/yellow/red phosphors combinations. The prepared white LEDs based on SCB:0.005Ce 3+ blue-cyan phosphor, green/red or yellow/red phosphors show a lower proportion of high-energy blue light and are suitable for healthy lighting applications.
研究领域:
材料科学
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光电子学
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固态照明
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荧光粉化学
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发光材料
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DOI
高影响因子
Foods
·
2022
·Vol. 11
·期 21
·3388
·
IF 5.561
Xijuan Tu,Yunmin Tao,Jiaxu Chen,Chunping Du,Qian Jin,Yuchang He,Ji Yang,Shaokang Huang,Wenbin Chen
In the present study, a lanthanide fluorescence sensor array was developed for the discrimination of honey’s botanical origin. Dipicolinic acid (DPA) was used as the antenna ligand for sensitizing the fluorescence of Tb3+and Eu3+to prepare the DPA-Tb3+/Eu3+complex. This lanthanide fluorescence sensor showed a cross-reactive response to the major constituents of honey, which led to the result that different classes of honey solution exhibited distinct quenching effects on the fluorescence of the DPA-Tb3+/Eu3+complex. Furthermore, a fluorescence sensor array composed of ten sensors was constructed by adjusting the pH and the component of the DPA-Tb3+/Eu3+complex to show multivariate responses towards honey. The visual fluorescence image of the sensor array was recorded by using a smartphone under excitation with portable UV lamp. Results indicated that the pattern of the visual image was related with the botanical origin. After extracting the RGB value of each sensor in 96-well plate, the ratio of R/G was used for principal component analysis (PCA). The results showed that three classes of honey (astragalus, logan, and litchi) were well distinguished. Moreover, the value of principal component 1 (PC1) showed good linearity with the composition of mixing honey and could be used for semi-quantitative analysis. The proposed lanthanide fluorescence sensor array presents a visual and portable method for the discrimination of a honey’s origin without the use of analytical instruments, and might provide a novel and simple strategy for the measurement of food origin.Keywords:honey;botanical origin;lanthanide complex;fluorescence;sensor array
研究领域:
食品科学
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分析化学
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光谱学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Min Jia,Fupei Xu,Fei Zhai,Xiaoying Yu,Meixia Du
BPA aptamers functionalized cerium oxide nanoparticles encapsulated in zeolitic imidazolate framework-8 (CeO 2 @ZIF-8/Apt) were developed to fabricate an all-in-one portable platform for on-site quantitative detection of BPA. By combining biocomposites with a 3,3′,5,5′-tetramethylbenzidine (TMB)-based sodium alginate (SA) hydrogel and smartphone-based RGB analysis, highly sensitive and convenient monitoring of BPA was achieved. CeO 2 @ZIF-8 composites were constructed using a novel surfactant-modified concentration-controlled synthesis strategy. After being functionalized with BPA aptamers, CeO 2 @ZIF-8/Apt biocomposites were used as target-response colorimetric probes for target recognition and signal transduction. The oxidase-like activity of CeO 2 @ZIF-8 was effectively sealed by BPA aptamers and controllably released in a concentration-dependent manner through aptamer-BPA reactions. Utilizing SA hydrogels containing TMB in the caps, a one-step sample addition and one-pot detection can be conveniently achieved and reliably quantified by smartphone-based RGB analysis in an instrument-free way. The detection range of this portable detection platform is 50 pg/mL to 500 ng/mL with limit of detection calculated as 34.88 pg/mL, comparable to that of conventional detection in the solution system (4.57 pg/mL). The recoveries in tap water, apple juice, and milk ranged from 91.02 % and 106.75 %. This work contributes new insights into the design of all-in-one detection platforms for contaminants monitoring in resource-constrained regions.
研究领域:
环境科学
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分析化学
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纳米技术
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生物技术
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Wen-Jie Wu,Qi Zhao,Rui Zhou,Ya-Chuan Liang,Wen-Bo Zhao,Chong-Xin Shan
An europium functionalized ZnO quantum dots (QDs) ratiometric fluorescent nanoprobe is designed to establish a real time, on-site visual, and highly sensitive probe method for tetracycline (TC). The yellow-emitting ZnO QDs serves as the internal reference, while the Eu 3+ chelated on the surface of ZnO QDs is used as the signal reporting unit. This nanoprobe exhibits rapid response, excellent selectivity, and high sensitivity with a detection limit of 4 nM in detecting the levels of TC. In addition, fluorescence of the nanoprobe can change from yellow to red as the concentration of TC increases. Thus, naked eye detection of TC was realized using the test paper processed by nanoprobe, followed by RGB value analysis function on the mobile phone APP.
研究领域:
分析化学
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纳米技术
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环境科学
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生物技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lingling Qin,Jie Cao,Dan Lin,Shihao Xu,Yucheng Li,Changlong Jiang
Utilization of organic reactions can offer more counterparts to design organic fluorescent probes and expand the probe libraries. Herein, a Strecker-like reaction was induced to prepare fluorescent probe for enzyme-free and visual quantitative monitoring of carbamates. Carbamate pesticides (CPs) are representative pesticides whose residues in water bodies and agricultural and sideline products seriously endanger human health. It is particularly important to develop a real-time/on-site sensing method to monitor the residue levels of CPs. The bottleneck of traditional detection methods is that only one of the pesticides can be selectively detected, so the full-spectrum detection of CPs can improve the practical application value. Based on the principle of Strecker-like reaction induced by 2, 3-naphthalenedialdehyde (NDA) and sulfite, we constructed an enzyme-free ratiometric fluorescent probe with CdTe quantum dots (CdTe QDs) as the background fluorescence for full-spectrum visual recognition of CPs. After addi-tion of CPs, isoindole with green fluorescence is generated by nucleophilic condensation reaction, and this fluorescent probe provides a distinct color variation from red to green, which shows a good linear relationship to CPs residues concentrations in the range of 0.1–4.5 μM with a sensitive limit of detection (LOD) of 18.6 nM. In addition, we developed a novel enzyme-free ratiometric fluorescence intelligent detection platform combined with a smartphone, which can visually quantitatively detect CPs in water, apple, and cabbage by identifying the RGB values of the fluorescent probe solution and the corresponding paper-based sensor with a sensitive limit of detection (LOD) of 34.5 nM. The present sensing strategy realizes the rapid visual and quantitative detection of CPs residues in food and the environment, and provides an effective way to utilization of organic reactions for trace hazardous substances detection.
研究领域:
分析化学
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环境科学
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食品安全
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有机化学
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传感器与执行器
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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）