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Vertical α-Feooh nanowires grown on the carbon fiber paper as a free-standing electrode for sensitive h2o2 detection

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Nano Research 2016年第8期9卷 2260-2269页

作者： Shichao Du Zhiyu Ren Jun Wu Wang Xi honggang Fu Institute of Theoretical chemistry Jilin University ChangChun 130023 China Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People's Republic of China School of Chemistry and Materials Science Heilongjiang University Harbin 150080 China

highly sensitive, selective, and stable hydrogen peroxide （h2o2） detection using nanozyme-based catalysts are desirable for practical applications. herein, vertical α-Feooh nanowires were successfully grown on the surface of carbon fiber paper （CFP） via a low-temperature hydrothermal procedure. The formation of vertical α-Feooh nanowires is ascribed to the structure-directing role of sodium dodecyl sulfate. The resulting free-standing electrode with one-dimensional （1D） nanowires offers oriented channels for fast charge transfer, excellent electrical contact between the electrocatalyst and the current collector, and good mechanical stability and reproducibility. Thus, it can serve as an efficient electrocatalyst for the reduction and sensitive detection of h2o2. The relation of the oxidation current of h202 with the concentration is linear from 0.05 to 0.5 mM with a sensitivity of -0.194 mA/（***2） and a low detection limit of 18μM. Furthermore, the portability in the geometric tailor and easy device fabrication allow extending the general applicability of this free-standing electrode to chemical and biological sensors.

关键词： α-Feooh nanowires free-standing electrode synergistic effect electrocatalysis h2o2 detection

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highly sensitive electrochemical detection of living cells based on diamond microelectrode arrays

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Chinese Chemical Letters 2018年第6期29卷 919-921页

作者： Jun Ruan Wenbo Zhang hang Zhang Yun Chen Fawad Ur Rehman hui Jiang Steffen Strehle Alberto Pasquarelli Xuemei Wang State Key Laboratory of Bioelectronics (Chien-Shiung Wu Laboratory) School of Biological Science and Medical Engineering Southeast University Institute of Electron Devices and Circuits Ulm University

We designed boron-doped nanocrystalline diamond microelectrode arrays（BNCD-MEAs） with 16 channels for the bioanalysis of multicellular samples, which could be readily adapted for a highly sensitive detection of h2 o2[2_TD$IF]released from stimulated cells by ascorbic acid（AA）. our observations demonstrated that the as-prepared diamond microelectrode arrays could be utilized to distinguish cancer cells from normal cells, and the amperometric study showed the considerable differences in the currents, indicating that the related hep G2 cancer cells could release more h2 o2 than that of L02 normal cells. This supports the possibility to use diamond-based MEAs for rapid cancer cell detection in future clinic applications.

关键词： BNCD-MEAs 16 Channels Bioanalysis Stimulated cells h2o2 detection

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DNA-Templated Silver Nanoclusters Formation at Gold Electrode Surface and Its Application to hydrogen Peroxide detection

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Chinese Journal of Chemistry 2012年第9期30卷 1962-1965页

作者：许媛媛陈阳阳杨娜娜孙丽洲李根喜 Department of Biochemistry and State Key Laboratory of Pharmaceutical Biotechnology Nanjing UniversityNanjingJiangsu 210093China Laboratory of Biosensing Technology School of Life ScienceShanghai UniversityShanghai 200444China Department of obstetrics The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsu 210036China

In this work, we have prepared Ag nanoclusters （Ag NCs） at gold electrode surface by using thiol-modified oligodeoxynucleotide consisting of eighteen cytosine deoxyribonucleotides （polyC18） as template and NaBh4 as reducing agent. Experimental results show that Ag nanoclusters （Ag NCs） can be formed around the template polyC18, while the formation can be characterized with electrochemical method. Further studies reveal that the fab- ricated Ag NCs may display high catalytic activity for the reduction of hydrogen peroxide （h2o2）, which can be further used for the detection of h20〉

关键词： DNA-templated cluster compounds Ag nanoclusters (Ag NCs) enzyme catalysis h2o2 detection

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Galvanostatic deposition of Pt nanoparticles on Tio2 nanotube arrays for amperometric detection of hydrogen peroxide at low overpotentials

Galvanostatic deposition of Pt nanoparticles on TiO2 nanotub...

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第八届中国功能材料及其应用学术会议

作者： LIU Jia-qing RUAN Li-li XU Guang-qing LV Jun WU Yu-cheng Laboratory of Functional Nanomaterials and Devices School of Materials Science and EngineeringHefei University of Technology

ISBN: (纸本)9783037859698

highly ordered Tio nanotube arrays(NTAs) modified with Pt nanoparticles(Pt/Tio NTAs)have been prepared by anodization of Ti foils followed by electrochemical deposition and employed to improve the performance of the low-overpotential determination of ho in *** of Tio and Pt/Tio NTAs were observed by SEM and *** electrochemical behaviors of Tio and Pt/Tio NTAs were compared by cyclic voltammograms(CVs) in phosphate buffer solutions in absence and prensence of 10 mM ho,which showed that Pt nanoparticles can enhance the electrochemical activities of TioNTAs and achieve low-overpotential determination of *** method with an applied potential of-100 mV was used for ho detemination,which demonstrated a good ho sensing with sensitivity of5.4 μA-cm·mM.

关键词： Tio2 nanotube arrays Pt nanoparticles h2o2 detection low overpotential amperometric method

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Palladium-Carbon Composite Nanoparticle Films with Enhanced Electrocatalytic Activity for hydrogen Peroxide Sensors

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Chinese Journal of Chemical Physics 2019年第2期32卷 218-222,I0003页

作者： Yun-hua Chen Wei-feng Luo Ji-an Chen Jue Wang National Laboratory of Solid State Microstructures Department of Materials Science and Engineering Collaborative Innovation Centre of Advanced Microstructures Nanjing University Nanjing 210093 China Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology Yancheng 224051 China

A nanocomposite electrocatalyst was prepared with the method of cluster beam deposition of palladium nanoparticle thin lms on carbon nanoparticle supporting layers and used as sensitive nonenzyme hydrogen peroxide sensors. An enhancement on the electrocatalytic activity of the palladium nanoparticles toward h2o2 reduction was observed, which was related to the coverage of the carbon nanoparticles. With one monolayer of carbon nanoparticles, the h2o2 detection sensitivity reached the maximum, which was more than twice of that of the pure Pd nanoparticles.

关键词： Carbon nanoparticles Palladium nanoparticles Electrocatalyst Gas phase cluster beam deposition h2o2 detection

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h_(2)o_(2)-sensitive nanoscale coordination polymers for photoacoustic tumors imaging via in vivo chromogenic assay

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Journal of Innovative optical health Sciences 2022年第5期15卷 1-12页

作者： Jiayue Zhao Fei Gong Nailin Yang huali Lei Zhihui han Yuqi Yang Liang Cheng Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of FunctionalNano&Soft Materials(FUNSoM)Soochow University Suzhou 215123 JiangsuP.R.China Wuhan National Laboratory for optoelectronics and School of optical and Electronic Information huazhong University of Science and Technology Wuhan 430074 P.R.China

Photoacoustic(PA)imaging with much deeper tissue penetration and better spatial resolution had been widely employed for the prevention and diagnosis of many *** this study,a new type of hydrogen peroxide(h_(2)o_(2)T-activated photoacoustic nanoprobe[Mn-Ah nanoscale coordination polymer nanodots(NCPs)]was successfully synthesized by a simple one-step method in water phase containing 2,20-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)(ABTS),horse radish peroxidase(hRP),and manganese ion(Mn^(2+).After modification by polyethylene glycol(PEG),Mn-Ah NCPs exhibited excellent stability and biocompatibility for in vivo h_(2)o_(2)-responsive chromogenic assay with great speci¯city and *** the presence of h_(2)o_(2),colorless ABTS would be converted by hRP into the oxidized form with strong near-infrared(NIR)absorbance,enabling photoacoustic detection of endogenous h_(2)o_(2).Using h_(2)o_(2)-activated Mn-Ah NCPs,we have successfully performed PA imaging and h_(2)o_(2)detection of subcutaneous murine colon CT26 tumor and deep-seated orthotopic bladder *** to the inherent Mn element existence inside the Mn-Ah,this nanoprobe also serves as a good T1-weighted magnetic resonance imaging(MRI)contrast agent ***,after accomplishing its imaging functions,the Mn-Ah NCPs could be cleared out from the body without any long-term toxicity,providing a new opportunity for cancer diagnosis and treatment.

关键词： Nanoscale coordination polymers(NCPs) PA imaging MRI h2o2 detection metabolic nanoprobes

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