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学者姓名：汪夏燕
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摘要 ：
As a vital factor in cell metabolism, nitric oxide (NO) is associated with nitrosative stress and subsequent inflammations and diseases. In situ, real-time NO monitoring is challenging due to its relative trace concentration and fast diffusion in cell. Scanning electrochemical microscopy (SECM) is suited uniquely for single-cell analysis, and its electrochemical response to targets can be further enhanced by improving the interfacial properties of its tip. Here, an ultramicroelectrodes (UMEs) modification strategy based on bimetallic single-particle was proposed for the first time. This mesoporous platinum/iridium alloy single-particle (mPtIr SP) interface using micelle- assisted electrodeposition was characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). And the nucleation kinetic progress which can be defined as "oil-in-water-like" electrode- position was discussed in detail. The high sensitivity (203.86 mu A/mu M & sdot;cm(2)) and good selectivity for NO detection benefits from the high catalysis of the PtIr alloy and the high mass transfer properties of the porous interface. In particular, this novel UME can real-time monitor NO release from a single MCF-7 cell stimulated by perfluorooctanoic acid (PFOA), providing new ideas for contaminant toxicity assessment, health diagnostics, and disease treatment.
关键词 ：
Micelle-assisted electrodeposition Micelle-assisted electrodeposition SECM SECM Single particle Single particle Single cell Single cell Nitric oxide Nitric oxide
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| GB/T 7714 | Wu, Jiening , Du, Yuying , Wang, Ziqi et al. Mesoporous PtIr alloy single-particle: A novel SECM-tip for in situ monitoring NO of single-cell [J]. | BIOSENSORS & BIOELECTRONICS , 2024 , 267 . |
| MLA | Wu, Jiening et al. "Mesoporous PtIr alloy single-particle: A novel SECM-tip for in situ monitoring NO of single-cell" . | BIOSENSORS & BIOELECTRONICS 267 (2024) . |
| APA | Wu, Jiening , Du, Yuying , Wang, Ziqi , Lu, Liping , Wang, Xiayan , Guo, Guangsheng . Mesoporous PtIr alloy single-particle: A novel SECM-tip for in situ monitoring NO of single-cell . | BIOSENSORS & BIOELECTRONICS , 2024 , 267 . |
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摘要 ：
Modern chromatography is increasingly focused on miniaturization and integration. Compared to conventional liquid chromatography, microfluidic chip liquid chromatography (microchip -LC) has the potential due to its zero -dead volume connection and ease of integration. Nano -sized packings have the potential to significantly enhance separation performance in microchip -LC. However, their application has been hindered by packing difficulties. This study presents a method for packing nano -sized silica particles into a microchannel as the stationary phase. The microchip -LC packed column was prepared by combining the weir and the porous silica single -particle as frit to retain the packing particles. A surface tensionbased single -particle picking technique was established to insert porous single -particle frit into glass microchannels. Additionally, we developed a slurry packing method that utilizes air pressure to inject nano -sized packing into the microchannel. Pressure -driven chromatographic separation was performed using this nano -packed column integrated into a glass microchip. The mixture of four PAHs was successfully separated within just 8 min using a 5 mm separation channel length, achieving high theoretical plates (106 plates/m). Overall, these findings demonstrate the potential of utilizing nano -sized packings for enhancing chromatographic performance in microchip systems. (c) 2024 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
关键词 ：
Single -particle frit Single -particle frit Chromatographic separation Chromatographic separation Packed column Packed column Microchip LC Microchip LC Nano -size packing Nano -size packing
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| GB/T 7714 | Hu, Wangyan , Li, Ke , Dou, Xiangnan et al. Nano-sized stationary phase packings retained by single-particle frit for microchip liquid chromatography [J]. | CHINESE CHEMICAL LETTERS , 2024 , 35 (4) . |
| MLA | Hu, Wangyan et al. "Nano-sized stationary phase packings retained by single-particle frit for microchip liquid chromatography" . | CHINESE CHEMICAL LETTERS 35 . 4 (2024) . |
| APA | Hu, Wangyan , Li, Ke , Dou, Xiangnan , Li, Ning , Wang, Xiayan . Nano-sized stationary phase packings retained by single-particle frit for microchip liquid chromatography . | CHINESE CHEMICAL LETTERS , 2024 , 35 (4) . |
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摘要 ：
The widespread use of phenylurea herbicides (PHs) is a serious threat to human health and environmental safety. These pollutants usually have similar molecular structures but distinct toxicities. Therefore, developing rapid detection methods to analyze PHs quantitatively and qualitatively is highly desirable. This study fabricated a microfluidic glass liquid chromatography (LC) coupled with electrochemical detection (ECD) and SurfaceEnhanced Raman spectroscopy (SERS) synchronous system, which demonstrated excellent separation and analysis performance for PHs. The complete separation of three PHs could be achieved using the microfluidic chip LC with a theoretical plate number of 342525 plates m-1. The limit of detection (LOD) of the PHs for optimized electrochemical analysis reached 0.0099-0.1388 mmol/L. More importantly, the detection system integrated with ECD and SERS had high sensitivity and molecular recognition ability, with intra and inter -day precision of less than 6.7630% and 7.5601%, respectively. The recovery of the PHs could reach 102.9861% when this detection system was applied to the analysis of soil extracts in the small potted plant and actual water samples in the environment. It is expected that the microfluidic chip with the LC-ECD-SERS synchronous detection system has significant potential in various environmental, food safety, drug, and biomedical analyses.
关键词 ：
Surface -Enhanced Raman spectroscopy Surface -Enhanced Raman spectroscopy Microfluidic chip Microfluidic chip Electrochemical detection Electrochemical detection
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| GB/T 7714 | Wang, Xu , Guo, Ziyang , Zhang, Dongtang et al. Integrating liquid chromatography-electrochemical detection-surface Enhanced Raman Spectroscopy on microfluidic chip for phenylurea herbicides analysis [J]. | SENSORS AND ACTUATORS B-CHEMICAL , 2024 , 407 . |
| MLA | Wang, Xu et al. "Integrating liquid chromatography-electrochemical detection-surface Enhanced Raman Spectroscopy on microfluidic chip for phenylurea herbicides analysis" . | SENSORS AND ACTUATORS B-CHEMICAL 407 (2024) . |
| APA | Wang, Xu , Guo, Ziyang , Zhang, Dongtang , Yan, Yong , Yu, Yaqing , Du, Biao et al. Integrating liquid chromatography-electrochemical detection-surface Enhanced Raman Spectroscopy on microfluidic chip for phenylurea herbicides analysis . | SENSORS AND ACTUATORS B-CHEMICAL , 2024 , 407 . |
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摘要 ：
The development of efficient strategies to tune the CO2RR selectivity of Cu-based catalytic interfaces, especially on specific domains, such as Cu (200) facets with high activity toward competitive hydrogenation evolution reaction (HER), remains a challenging task. In this work, Cu-based catalytic layers with thiocyanate (-SCN), cyanide (-CN), or ethylenediamine (-NH2R) coordination linkages are prepared on Cu nanocolumns arrays (Cu NCAs) with predominant (200) exposed facets. The coordination of these ligands induces more Cu+ species and inhibits the adsorption of H & lowast; on the Cu (200) facet, leading to enhanced CO2RR performance and substantially suppressing the competitive HER. The faradaic efficiency (FE) of Cu-SCN, Cu-CN, and Cu-NH2R NWAs for producing HCOOH, C2H4, and C1 mixture products (HCOOH and CO) reach to 66.5%, 21.1%, and 57.1%, respectively. In situ spectroscopic studies reveal Cu-SCN, Cu-CN, and Cu-NH2R exhibit more reasonable adsorption energy toward & lowast;OCHO, *CO, and *COOH intermediates, promoting the HCOOH, C2H4, and C1 mixture generation, respectively. This study might provide a new perspective for the development of high-performance Cu-based CO2RR catalytic electrodes based on the combination of various commercial free-standing Cu substrates and organic/inorganic ligands. (c) 2024 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
关键词 ：
Mechanism analysis Mechanism analysis HER active facets HER active facets In situ spectroscopic analysis In situ spectroscopic analysis Cu nanocolumns arrays (Cu NCAs) Cu nanocolumns arrays (Cu NCAs)
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| GB/T 7714 | Yan, Yong , Li, Tongxian , Oliva-Ramirez, Manuel et al. Efficient tuning of the selectivity of Cu-based interface for electrocatalytic CO2 reduction by ligand modification [J]. | MATERIALS TODAY ENERGY , 2024 , 44 . |
| MLA | Yan, Yong et al. "Efficient tuning of the selectivity of Cu-based interface for electrocatalytic CO2 reduction by ligand modification" . | MATERIALS TODAY ENERGY 44 (2024) . |
| APA | Yan, Yong , Li, Tongxian , Oliva-Ramirez, Manuel , Zhao, Yuguo , Wang, Shuo , Chen, Xin et al. Efficient tuning of the selectivity of Cu-based interface for electrocatalytic CO2 reduction by ligand modification . | MATERIALS TODAY ENERGY , 2024 , 44 . |
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摘要 ：
本发明提供了一种Au@Pt/Pd核壳材料及其制备方法和应用，属于纳米功能材料制备技术领域。本发明公开了微流控系统的构建方法、可调混合的玻璃微流控反应芯片结构设计以及阐述了核壳材料形貌可控的机理。通过湿法刻蚀法制备了具有特定数量微混合结构的微流控反应芯片，从而实现了反应过程混合效率可控。通过使用控制混合效率实现了核壳结构的精确控制。本发明的方法与现有的制备方法以及传统的其他方法相比，具有快速、重复性强、可控性强、可连续生产等优点。
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| GB/T 7714 | 汪夏燕 , 汪吴斌 , 张东堂 et al. 一种Au@Pt/Pd核壳材料及其制备方法和应用 : CN202310110936.9[P]. | 2023-02-14 . |
| MLA | 汪夏燕 et al. "一种Au@Pt/Pd核壳材料及其制备方法和应用" : CN202310110936.9. | 2023-02-14 . |
| APA | 汪夏燕 , 汪吴斌 , 张东堂 , 郭广生 . 一种Au@Pt/Pd核壳材料及其制备方法和应用 : CN202310110936.9. | 2023-02-14 . |
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摘要 ：
Carbon-centered radicals derived from parent compounds are primary radical intermediates involved in the degradation of organic pollutants. This study presents a bifunctional probe with a fluorescent "switch-on" and radical capture functions for in situ trapping and specific detection of carbon-centered radicals. Carbon-centered radicals can be quickly trapped and they can notably turn on the 11-fold fluorescence, which enables the monitoring of unstable and short-lived carbon-centered radicals generated during toluene degradation. The proposed system was applied to assess the toluene degradation efficacy in real time. The fluorescence response was similar to that of the toluene degradation efficiency measured using high-performance liquid chromatog-raphy (HPLC). In addition, the benzyl radical was identified as the primary carbon-centered radical intermediate by high-resolution liquid chromatography-mass spectrometry (LC-MS), which provides direct evidence for the toluene degradation mechanism by thermally activated persulfate.
关键词 ：
Degradation efficiency Degradation efficiency Fluorescent probe Fluorescent probe Thermally-activated persulfate system Thermally-activated persulfate system Carbon-centered radicals Carbon-centered radicals
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| GB/T 7714 | Lian, Dingding , Dou, Xiangnan , Diao, Rui et al. Fluorescent switch-on probe for carbon-centered radicals and real-time assessment of toluene degradation efficacy [J]. | SENSORS AND ACTUATORS B-CHEMICAL , 2023 , 386 . |
| MLA | Lian, Dingding et al. "Fluorescent switch-on probe for carbon-centered radicals and real-time assessment of toluene degradation efficacy" . | SENSORS AND ACTUATORS B-CHEMICAL 386 (2023) . |
| APA | Lian, Dingding , Dou, Xiangnan , Diao, Rui , Zhang, Wenmei , Wang, Guangfeng , Wang, Xiayan . Fluorescent switch-on probe for carbon-centered radicals and real-time assessment of toluene degradation efficacy . | SENSORS AND ACTUATORS B-CHEMICAL , 2023 , 386 . |
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摘要 ：
Over past decades, microfluidics has been proven to be a valuable tool for cell biological research due to several merits, including size compatibility with cells, controllability with small volume, scalable format, high throughput with automation, and integration. In recent years, three-dimensional (3D) printing technologies have emerged as a potential new modality for simplifying the fabrication of microfluidics. This tool enables exquisite structures and functions that can be used for addressing specific biological questions. Here we try to review the current state of 3D printed microfluidics with capacities of studying cell biology, including biocompatibility, physiological mimicking, and recent development in the biomedical field. Looking back, we discuss current achievements in such systems for cell biology study, the differences, the commonalities, the combinations with bioprinting, and the opportunities for tackling specific problems. The 3D printed microfluidics could be widely adopted by regular biological laboratories, thus expediting the daily grind of cell-based assay and biomedical investigation. (c) 2022 Elsevier B.V. All rights reserved.
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| GB/T 7714 | Zhao, Liang , Wang, Xiayan . 3D printed microfluidics for cell biological applications [J]. | TRAC-TRENDS IN ANALYTICAL CHEMISTRY , 2023 , 158 . |
| MLA | Zhao, Liang et al. "3D printed microfluidics for cell biological applications" . | TRAC-TRENDS IN ANALYTICAL CHEMISTRY 158 (2023) . |
| APA | Zhao, Liang , Wang, Xiayan . 3D printed microfluidics for cell biological applications . | TRAC-TRENDS IN ANALYTICAL CHEMISTRY , 2023 , 158 . |
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摘要 ：
Direct conversion of methane into value-added chemicals, such as methanol under mild conditions, is a promising route for industrial applications. In this work, atomically dispersed Rh on TiO2 suspended in an aqueous solution was used for the oxidation of methane to methanol. Promoted by copper cations (as co-catalyst) in solution, the catalysts exhibited high activity and selectivity for the production of methanol using molecular oxygen with the presence of carbon monoxide at 150 degrees C with a reaction pressure of 31 bar. Millimole level yields of methanol were reached with the selectivity higher than 99 % using the Rh/TiO2 catalysts with the promotion of the copper cation. CO was the reductive agent to generate H-2 from H2O, which led to the formation of H2O2 through the reaction of H-2 and O-2. Atomically dispersed Rh activated the C-H bond in CH4 and catalyzed the oxidation using H2O2. Copper cations maintained the low-valence state of Rh. Moreover, copper acted as a scavenger for suppressing the overoxidation, thus leading to the high selectivity of methanol.
关键词 ：
Atomic Dispersion Atomic Dispersion Copper Cations Copper Cations Rhodium Rhodium Methane Methane Methanol Methanol
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| GB/T 7714 | Gu, Fubo , Qin, Xuetao , Li, Mengwei et al. Selective Catalytic Oxidation of Methane to Methanol in Aqueous Medium over Copper Cations Promoted by Atomically Dispersed Rhodium on TiO2 [J]. | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2022 , 61 (18) . |
| MLA | Gu, Fubo et al. "Selective Catalytic Oxidation of Methane to Methanol in Aqueous Medium over Copper Cations Promoted by Atomically Dispersed Rhodium on TiO2" . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 61 . 18 (2022) . |
| APA | Gu, Fubo , Qin, Xuetao , Li, Mengwei , Xu, Yao , Hong, Song , Ouyang, Mengyao et al. Selective Catalytic Oxidation of Methane to Methanol in Aqueous Medium over Copper Cations Promoted by Atomically Dispersed Rhodium on TiO2 . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2022 , 61 (18) . |
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摘要 ：
While single-cell mass spectrometry can reveal cellular heterogeneity and the molecular mechanisms of intracellular biochemical reactions, its application is limited by the insufficient detection sensitivity resulting from matrix interference and sample dilution. Herein, we propose an intact living-cell electrolaunching ionization mass spectrometry (ILCEI-MS) method. A capillary emitter with a narrow-bore, constant-inner-diameter ensures that the entire living cell enters the MS ion-transfer tube. Inlet ionization improves sample utilization, and no solvent is required, preventing sample dilution and matrix interference. Based on these features, the detection sensitivity is greatly improved, and the average signal-to-noise (S/N) ratio is about 20 : 1 of single-cell peaks in the TIC of ILCEI-MS. A high detection throughput of 51 cells per min was achieved by ILCEI-MS for the single-cell metabolic profiling of multiple cell lines, and 368 cellular metabolites were identified. Further, more than 4000 primary single cells digested from the fresh multi-organ tissues of mice were detected by ILCEI-MS, demonstrating its applicability and reliability.
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| GB/T 7714 | Shao, Yunlong , Zhou, Yingyan , Liu, Yuanxing et al. Intact living-cell electrolaunching ionization mass spectrometry for single-cell metabolomics [J]. | CHEMICAL SCIENCE , 2022 , 13 (27) : 8065-8073 . |
| MLA | Shao, Yunlong et al. "Intact living-cell electrolaunching ionization mass spectrometry for single-cell metabolomics" . | CHEMICAL SCIENCE 13 . 27 (2022) : 8065-8073 . |
| APA | Shao, Yunlong , Zhou, Yingyan , Liu, Yuanxing , Zhang, Wenmei , Zhu, Guizhen , Zhao, Yaoyao et al. Intact living-cell electrolaunching ionization mass spectrometry for single-cell metabolomics . | CHEMICAL SCIENCE , 2022 , 13 (27) , 8065-8073 . |
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摘要 ：
本发明属于生物电分析化学技术领域，本发明提供了一种碳纤维纳米电极及其制备方法与应用。碳纤维纳米电极的制备方法包括以下步骤：S1、将碳纤维从尖端毛细管的尖端口部分插入；S2、铜导线从尖端毛细管的非尖端口插入与碳纤维用银导电胶连接，并使用环氧胶在尖端毛细管的两端口处分别固定碳纤维与铜导线；S3、用套管套住尖端毛细管的尖端以及部分碳纤维，并使用环氧胶将套管与尖端毛细管的尖端固定，得到碳纤维纳米电极粗品；S4、将碳纤维纳米电极粗品置于NaOH溶液中作为工作电极进行电化学刻蚀即得碳纤维纳米电极。本发明制备的碳纤维纳米电极尖端直径小、稳定性好、重现性高，在制备微型生物电化学传感器中有良好的应用前景。
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| GB/T 7714 | 郭广生 , 常亚冉 , 张东堂 et al. 一种碳纤维纳米电极及其制备方法与应用 : CN202211197712.8[P]. | 2022-09-29 . |
| MLA | 郭广生 et al. "一种碳纤维纳米电极及其制备方法与应用" : CN202211197712.8. | 2022-09-29 . |
| APA | 郭广生 , 常亚冉 , 张东堂 , 张文美 , 汪夏燕 . 一种碳纤维纳米电极及其制备方法与应用 : CN202211197712.8. | 2022-09-29 . |
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