MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Weidong Qin,Hongyuan Tian,Zhao Meng,Zhanqiu Tang,Junhua Wang,Zhenglong Wu
We synthesized excitation-dependent fluorescent carbon dots (CDs) through a one-pot hydrothermal process using mango pulps as precursors and discovered that the ozone-treated CDs (O 3 -CDs) could stabilize the diimine form of oxidized 3,3′,5,5′-tetramethylbenzidine (diimine oxTMB). A dual-mode colorimetry and ratiometric fluorescence method using O 3 -CDs and TMB as probes was developed for detecting sarcosine. During measurement, sarcosine was selectively oxidized by sarcosine oxidase, and the resulting hydrogen peroxide was catalyzed by horseradish peroxidase to convert TMB into a blue-colored oxidized product. Under acidic conditions, this product was further oxidized to diimine oxTMB, which exhibited an absorbance band at 450 nm. Due to the inner filter effect, the fluorescence emission of O 3 -CDs at 450 nm was significantly quenched by the diimine oxTMB, while the emission at 550 nm was utilized as a reference signal. The dual-mode method selectively detected sarcosine, with detection limits of 0.034 µM and 0.096 µM for colorimetry and ratiometric fluorescence detection, respectively. The ratiometric fluorescence sensing strategy provided a built-in correction to prevent errors originating from environmental variabilities. Moreover, the stabilization of diimine oxTMB mediated by O 3 -CDs improved the detection performance of the method. This study enriches the library of luminescent CDs through the rational utilization of natural biomass and introduces a novel approach to improve the analytical performance of dual-mode detection.
研究领域:
分析化学
·
生物传感
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Jiyuan Yu,Jian Zheng,Wei Wang,Zhijia Zhu,Chunyan Hu,Baojiang Liu
Nowadays, the global climate is constantly being destroyed and the fluctuations in ambient temperature are becoming more frequent. However, conventional single-mode thermal management strategies (heating or cooling) failed to resolve such dynamic temperature changes. Moreover, developing thermal management devices capable of accommodating these temperature variations while remaining simple to fabricate and durable has remained a formidable obstacle. To address these bottlenecks, we design and successfully fabricate a novel dual-mode hierarchical (DMH) composite film featuring a micro-nanofiber network structure, achieved through a straightforward two-step continuous electrospinning process. In cooling mode, it presents a high solar reflectivity of up to 97.7% and an excellent atmospheric transparent window (ATW) infrared emissivity of up to 98.9%. Noted that this DMH film could realize a cooling of 8.1 °C compared to the ambient temperature outdoors. In heating mode, it also exhibits a high solar absorptivity of 94.7% and heats up to 11.9 °C higher than black cotton fabric when utilized by individuals. In practical application scenarios, a seamless transition between efficient cooling and heating is achieved by simply flipping the film. More importantly, the DMH film combining the benefits of composites demonstrates portability, durability, and easy-cleaning, promising to achieve large-scale production and use of thermally managed textiles in the future. The energy savings offered by film applications provide a viable solution for the early realization of carbon neutrality.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Aihua Zhou,Feng Song,Weijing Yao,Yingdong Han,Feifei Song,Wei Wu,Chengguo Ming,Dandan Ju,Adnan Khan
The carbon-dots/NaLuF 4 microcrystals have been synthesized by the hydrothermal method and bright blue emission from carbon dots is observed in aqueous and solid state under 365 nm excitation. Self-quenching property of the carbon-dots/NaLuF 4 microcrystals under solid state was deeply investigated, by changing the ratio of citric acid (CA) and ethylenediamine (DHE). The results indicate that the carbon dots can be effectively adsorbed and dispersed on the surface of NaLuF 4 microcrystals, suppressing the aggregation of carbon dots. Furthermore, the upconversion luminescence can also be realized under 980 nm laser excitation. From the above observations, the carbon-dots/NaLuF 4 microcrystals not only reveal emission property of carbon dots and NaLuF 4 , respectively, but also optimize the property of carbon dots. It provides a promising new strategy to prevent the carbon dots quenching in solid state and the carbon-dots/NaLuF 4 microcrystals may have potential multi-applications in different fields including temperature sensing, solid-state display lighting as well as security inks.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Zhijiao Tang,Jiani Yang,Gongke Li,Yuling Hu
In this work, a strategy of sulfur-rich doped nitrogen dots (S-Ndots) based on a single-source precursor (SSP) was developed and applied to sensing of Hg 2+ . Fluorescent S-Ndots were synthesized by microwave-assisted method using 2-azidothiazole as a single-source precursor, which served as carbon, nitrogen and sulfur source simultaneously. This SSP approach guarantee efficient core doping and improve the effect of doping in a molecular level, which is more efficient and simpler than the doping strategy with multiple precursors. The results showed that the as-synthesized S-Ndots have high sulfur component up to 24.6%, and their specific structure effectively promoted artificial peroxidase activity and coordination interaction. Interestingly, the fluorescence intensity could be quenched obviously and the peroxidase activity of the S-Ndots were selectively inhibited by Hg 2+ , then the S-Ndots were applied to the dual-mode sensing of Hg 2+ with both fluorometric and colorimetric readout. The S-Ndots-based sensing assay with simplicity and rapidity showed high selectivity to Hg 2+ with the detection limit of 0.1 μmol/L by fluorescence spectroscopy and a distinguishable change in the color was observed by the naked eye. In addition, the accuracy and precision were evaluated based on the quantitative detection of Hg 2+ in industrial waste water samples with satisfactory results. Moreover, the S-Ndots with good biocompatibility were further explored for imaging of Hg 2+ in A549 cells. As a novel member of nitrogen quantum dots family, the S-Ndots hold great promise to broaden its applications in environmental and biological sensing.
研究领域:
材料科学
·
环境科学
·
生物分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2023
·Vol. 38
·期 8
·1521-1528
·
IF 2.9
Zhan Shu,Mingzhe Du,Mengqi Li,Yanghui Liu,Lu Gan,Xiaohang Zhang,Weijun Gui
To obtain optimal luminescence, 0.12 g of GdVO 4 :3%Eu 3+ nanocrystals (NCs) and different volumes of nitrogen-doped carbon dots (N-CDs) crude solution were used as precursors, and the composite synthesized using the hydrothermal deposition method showed optimal luminescence when 11 ml (2.45 mmol) crude solution was used. In addition, similar composites with the same molar ratio as GVE/cCDs(11) were also prepared with the hydrothermal and physical mixing processes. Based on the test results of XRD, XPS, and PL spectra, for the composite GVE/cCDs(11), the highest (lowest) peak intensity of the C–C/C=C (C=O/C=N) bond, which was 1.18 (0.75) times that of GVE/cCDs-m, indicated most N-CDs deposition and led to their highest emission intensity under 365 nm excitation, although nitrogen atoms in the composite were shed slightly during the deposition process. Finally, as can be seen from the patterns designed for security applications that the optimally luminescent composite is one of the most promising candidates in the anti-counterfeiting field.
研究领域:
材料科学
·
化学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Kaiyue Hu,Lingxia Qin,Xinxin Ren,Zhiyong Guo,Sui Wang,Yufang Hu
Lead ion (Pb 2+ ) exposure is a serious hazard to human health, and its detection is still faced with undesirable bottleneck problems (poor sensitivity/selectivity and insufficient accuracy). Herein, a new dual-mode analytical platform for Pb 2+ assay is developed by integrating electrochemical (EC) with electro-chemiluminescent (ECL) system. It all starts with the shearing action of Pb 2+ to Pb 2+ -special DNAzyme (Pb-DNAzyme), and the substrate strand is cleaved at its cleavage site to result in two pieces of DNA, which are employed separately to construct the expected dual-mode biosensor. Interestingly, for EC mode, the Pb 2+ act as not only the target but also the inducing factor of the formation of in-situ G4 nanostructure, and the SWV technique is taken to achieve the signal output of the stacked crystal violet molecules. Furtherly, the other released DNAs can be captured by the three handing sides of DNA nano-prism, and trigger subsequently the opening of DNA hybridization chain reaction; then the designed free three bases can bring about TdT polymeric reaction; finally, by taking advantage of DNA nanoprobe, the dual-mode biosensor is developed successfully with the detection limit of 3.6 pM (EC) or 0.23 pM (ECL) (3δ/slope), which is much lower than the previous reports. This co-operative dual-mode method is also investigated for the analysis of Pb 2+ in the serum and lake water samples with acceptable results, presenting great potential applications in the future.
研究领域:
生物化学
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2025
·
IF 4.5
Hui Dong,Ke Xu,Zuying Wang,Wentian Chen,Yitong Jiang,Yidan Ye,Zhu Chang,Xu Zhu,Yanli Zhou,Maotian Xu,Yintang Zhang
Reactive sulfur species (RSS) play crucial roles in human physiology, with biothiols like hydrogen sulfide (H 2 S), cysteine (Cys), and glutathione (GSH) being key regulators of oxidative stress and signal transduction. Here, a dual-mode resorufin-based (Re) small-molecule probe (Re-RSS) with electrochemical and fluorescent properties was developed for biothiol detection. Using a ratiometric electrochemical strategy and a “turn-on” fluorescence method, Re-RSS enabled sensitive quantification of H 2 S, Cys, and GSH. The electrochemical approach showed linear ranges of 0–0.3 mM for H 2 S, 0–0.1 mM for Cys, and 0–0.08 mM for GSH. Fluorescence spectrometry revealed linear relationships in the ranges of 1 μM–0.3 mM (H 2 S), 2 μM–0.1 mM (Cys), and 5 μM–0.08 mM (GSH), with detection limits as low as 0.02, 0.01, and 0.08 μM (S/N = 3), respectively. This dual-mode sensor offers three major advantages: (1) dual-readout correction of system/background errors for improved accuracy; (2) independent signal transduction from distinct mechanisms, eliminating cross-interference; (3) negative-potential electrochemical detection free from biological interference. The direct dual-mode quantification highlights its significance and reliability for biothiol analysis in biological systems.
研究领域:
分析化学
·
生物化学
·
医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Yaxin Qiu,Jinxuan Ai,Aiying Liu,Chengkai Yang,Zhifeng Wang,Chong Chen,Xiaozhi Wang
For shape-shifting polymeric materials, the structure of material plays a critical role in determining shape-shifting pathways. However, homogenous structure is often insufficient to meet the programming demands of materials in complex external stimuli fields. In this work, a photoactive cross-linked network was constructed using coumarin-end-capped brush macromolecules, with the introduction of carbon nanofibers enabling efficient photothermal and electrothermal conversion. The dual-patterned programming of this system diversified responsive behaviors of the materials by introducing UV radiation and a shielding layer. Furthermore, the evolution of photo-crosslinking under UV irradiation was monitored in situ via rheological testing, and the temperature distribution within the materials was simultaneously detected in situ. This work presents a practical strategy for dual-patterned programming, enabling the design of shape-shifting pathways of materials under complex stimuli fields.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Can Zhang,Yongfei Zhou,Li Ming,Lihong Chen,Minqiao Xue,Jing Zhang,Hongyan Zhang
The inclusion of artificial food additives such as vanillin in infant formula should be strictly monitored to mitigate potential negative impacts on the dietary habits and health of infants. This raises a necessity of an accurate inspection and prompt feedback of vanillin in infant foods. In this study, colorimetric and fluorescent dual–mode assays based on CuNS/Fe 3 O 4 @MIPs were established to detect vanillin selectively and sensitively. Quantification of vanillin could be achieved with linear detection ranges of 1–100 μM and 1–150 μM for the colorimetric and fluorescent assays respectively. The corresponding detection limits were 0.11 and 0.10 μM respectively. The CuNS/Fe 3 O 4 @MIPs–based dual–mode assays exhibited good selectivity and stability for vanillin detection in infant formula and milk-based foods. Hence, this method can serve as a reliable tool for the cost-saving, effective and quantitative determination of vanillin in infant foods, with the potential to replace conventional instrumental analysis.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2025
·
IF 4
Qi Peng,Yan Ye,Xinglin Wu,Chenchen Lin,Xucong Lin,Qibiao Weng,Qinai Chen
Developing a functional media for precise identification of trace shellfish toxin would underpin the effective assessment of marine pollution. Herein, a novel monolithic column with a dual-mode strategy integrating antifouling and aptamer bionic affinity recognition was proposed for online specific identification of the marine toxin okadaic acid (OA). The zwitterionic monomer 2-(methacryloyloxy)ethylphosphorylcholine (MPC) and aptamers were synergistically employed to enable efficient reduction of matrix interferences and selective capture of target OA. Preparation optimization, characterization, and fouling-resistant mechanism of the dual-mode bionic monolith were evaluated. The zwitterion phosphorylcholine MPC introduced into the monolith significantly improved the fouling resistance to biomass substrates, meanwhile the aptamers were able to provide a high specific recognition capacity. Coupled with LC-MS, the as-prepared monolith provided an effective approach for highly selective and sensitive identification of OA. Good recovery yields of over 90% in shellfish tissue extracts and human serum were achieved with a sensitive limit of detection (LOD) as low as 0.1 ng/mL, as well as excellent specificity and low interference from proteins, fatty acids and analogues. Applied to popular shellfishes (such as clams, mussels, and oysters) and serum samples, trace OA toxin was accurately distinguished and quantified with satisfactory recoveries as 93.8 ± 2.2% – 99.8 ± 2.0% (n=3). Compared to the traditional HLB cartridge and other materials in the LC-MS method, the resulting anti-fouling aptamer monolith provided a more advanced online analysis mode with higher sensitivity and better resolution of OA in biological samples. It might provide an attractive access to an online bionic recognition platform with LC-MS for efficient, anti-interference and sensitive specific detection of trace marine toxin OA in biological samples.
研究领域:
分析化学
·
环境科学
·
海洋生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2021
·
IF 5.279
Xiaoqian Xie,Mingfei Pan,Liping Hong,Kaixin Liu,Jingying Yang,Shan Wang,Shuo Wang
In this study, the rhodamine 6G hydrazide (R6GH) complex was synthesized to develop an “off–on” output platform for fluorescence and visual dual-mode analysis of lead(II) (Pb2+). The prepared R6GH complex using the heat to reflux reaction of rhodamine 6G (R6G) and hydrazine hydrate was characterized through FT-IR, MS, 1H NMR, and 13C NMR and demonstrated to have good fluorescence stability and reversibility. The microenvironment for Pb2+ detection has been optimized in detail. Under the optimal conditions, the “off–on” R6GH-based fluorescence output platform showed a good response to Pb2+ in the concentration range of 0.05–6.0 μM (R2 = 0.9851) with a limit of detection (LOD) of 0.02 μM. Furthermore, at three spiked Pb2+ levels in the selected agricultural (tap water, soil) and food (fish, shrimp) samples, the developed R6GH-based fluorescence assays obtained a significant recovery range of 84.0–102.0% (RSD < 5.0%, n = 3), which had a good correlation with the results from ICP-MS (R2 = 0.9915). The developed R6GH immobilized paper-based array sensor can reach the lower LOD (2.5 μM) for Pb2+ through the naked eye. By combining with LAB analysis, a good linear response was obtained in the Pb2+ concentration range of 1.0–50.0 μM. These results indicated that the developed R6GH probe had great application potential in accurate detection of fluorescence and rapid visual and semiquantitative screening for Pb2+.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2022
·Vol. 7
·期 12
·2200371
·
IF 8.856
MingYang Yang,Guangyou Liu,Zheng Zeng,Shuhao Zhang,Jie Liu,Zong Qin,Zhihe Chen,Bo-Ru Yang
Human–machine interaction will be revolutionarily different in the future Internet of Things (IoT) environments. Many displays will be adopted onto electronic devices to enhance human–device communication, even under a very bright sunlight ambience. Thus, power consumption and sunlight visibility are important attributes for this application. Electrophoretic displays (EPDs) have the inherent advantages of ultra-low power consumption and high sunlight visibility, which are perfectly suitable for IoT applications. The low power consumption resulted from the balance of viscosity, gravity, and other complicated forces involved in the electrophoretic dispersion. This force balance is generally termed “bistability,” meaning the particle-packing can be stable without external power at black and white image states. However, good bistability implies a slow image updating rate, significantly degrades users’ experience. In this work, a 3D network structure that undergoes disruption and reorganization with the particles’ movement is utilized in the electrophoretic ink dispersion. Dynamic viscosity modulation enables the bistable and fast-response dual-working modes. The newly developed design can increase the response speed of EPDs by a factor of 2.38, simultaneously maintaining the bistability. The electronic ink with this reversible network provides a promising solution for the future video-rate e-paper displays.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）