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Artykuły w czasopismach na temat "Scanning Gel Electrochemical Microscopy (SGECM)"
Dang, Ning, Mathieu Etienne, Alain Walcarius i Liang Liu. "Scanning gel electrochemical microscopy (SGECM): The potentiometric measurements". Electrochemistry Communications 97 (grudzień 2018): 64–67. http://dx.doi.org/10.1016/j.elecom.2018.10.020.
Pełny tekst źródłaDang, Ning, Mathieu Etienne, Alain Walcarius i Liang Liu. "Scanning Gel Electrochemical Microscopy (SGECM): Lateral Physical Resolution by Current and Shear Force Feedback". Analytical Chemistry 92, nr 9 (1.04.2020): 6415–22. http://dx.doi.org/10.1021/acs.analchem.9b05538.
Pełny tekst źródłaLiu, Liang, Mathieu Etienne i Alain Walcarius. "Scanning Gel Electrochemical Microscopy for Topography and Electrochemical Imaging". Analytical Chemistry 90, nr 15 (13.07.2018): 8889–95. http://dx.doi.org/10.1021/acs.analchem.8b01011.
Pełny tekst źródłaOseland, Elizabeth E., Zoë J. Ayres, Andrew Basile, David M. Haddleton, Paul Wilson i Patrick R. Unwin. "Surface patterning of polyacrylamide gel using scanning electrochemical cell microscopy (SECCM)". Chemical Communications 52, nr 64 (2016): 9929–32. http://dx.doi.org/10.1039/c6cc05153g.
Pełny tekst źródłaZhu, Ji Ne, Sheng Li Zhao, Jiu Ba Wen i Zhao Yang Wu. "Electrochemical Properties of NiO thin Film Prepared by Sol-Gel Process". Advanced Materials Research 194-196 (luty 2011): 2487–90. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.2487.
Pełny tekst źródłaLuo, Hongmei, Qianglu Lin, Stacy Baber i Mahesh Naalla. "Surfactant-Templated Mesoporous Metal Oxide Nanowires". Journal of Nanomaterials 2010 (2010): 1–6. http://dx.doi.org/10.1155/2010/750960.
Pełny tekst źródłaNogala, Wojciech, Malte Burchardt, Marcin Opallo, Jerzy Rogalski i Gunther Wittstock. "Scanning electrochemical microscopy study of laccase within a sol–gel processed silicate film". Bioelectrochemistry 72, nr 2 (kwiecień 2008): 174–82. http://dx.doi.org/10.1016/j.bioelechem.2008.01.010.
Pełny tekst źródłaE, Sharel P., Minkyung Kang, Paul Wilson, Lingcong Meng, David Perry, Andrew Basile i Patrick R. Unwin. "High resolution visualization of the redox activity of Li2O2 in non-aqueous media: conformal layer vs. toroid structure". Chemical Communications 54, nr 24 (2018): 3053–56. http://dx.doi.org/10.1039/c7cc09957f.
Pełny tekst źródłaCovelo, Alba, Juan Genescá, Arturo Barba, Carmina Menchaca, Jorge Uruchurtu i Miguel Hernández. "Corrosion Behavior of Hybrid Sol-Gel Films Reinforced with Electrospun Nanofibers". Solid State Phenomena 227 (styczeń 2015): 119–22. http://dx.doi.org/10.4028/www.scientific.net/ssp.227.119.
Pełny tekst źródłaSadeghi, B., R. Sarraf-Mamoory i H. R. Shahverdi. "Surface Modification of LiMn2O4for Lithium Batteries by Nanostructured LiFePO4Phosphate". Journal of Nanomaterials 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/743236.
Pełny tekst źródłaRozprawy doktorskie na temat "Scanning Gel Electrochemical Microscopy (SGECM)"
Dang, Ning. "Développements de la microscopie électrochimique à balayage à sonde à gel". Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0243.
Pełny tekst źródłaIn the past 30 years, scanning electrochemical probe microscopy (SEPM) techniques have been developed as powerful tools for studying electrochemistry at micro/nano scale. The most developed and commercialized techniques are Scanning Electrochemical Microscopy (SECM) and Scanning Ion Conductance Microscopy (SICM). However, the entire sample is immersed in the electrolyte solution during the measurements, which may yield uncontrolled change of the surface due to the long scanning time. Instead of localizing electrode, the electrolyte can also be localized, which is known as Scanning Droplet Cell (SDC) or Scanning Electrochemical Cell Microscopy (SECCM). The experiments are carried out under ambient conditions. However, the spreading of droplet over sample surface may be affected by the hydrophilicity and roughness of sample, which brings challenges in quantitative analysis. Recently, Scanning Gel Electrochemical Microscopy (SGECM) was reported by our group as a novel SEPM technique. It is mainly based on a gel probe that immobilizes the electrolyte on a micro-disk electrode. Thus, the analysis can be achieved in ambient environment with controllable electrolyte spreading. This thesis is devoted to the further developments of SGECM. Foremost, the background of developments of SGECM is introduced in Chapter I. Different SEPM techniques, gel polymer electrolytes, achievements of SGECM are systematically presented, respectively. In Chapter II, the lateral physical resolution of SGECM is thoroughly and quantitatively studied by both marking single pixels and scanning over periodic samples. In chapter III, the potentiometric mode of SGECM is developed based on a novel Ag/AgCl-gel micro-reference electrode. As the gel probe undergoes thousands of pressing-stretching cycles in a mapping measurement, it is highly important to improve its mechanical strength. Chapter IV describes the preliminary effort of chemically cross-linking chitosan gel by glutaraldehyde. Chapter V further pushes forward the development of integrated gel probes with both working and reference electrode
Njomo, Njagi. "Synthesis of sulphonated and transition metal oxide doped polymeric nanocomposites for application in design of supercapacitors". University of the Western Cape, 2011. http://hdl.handle.net/11394/5429.
Pełny tekst źródłaTo meet a fast-growing market demand for next generation portable electronic devices with higher performance and increased device functionalities, efficient electrical energy devices with substantially higher energy, power densities and faster recharge times such as supercapacitors are needed. The overall aim of this thesis was to synthesize nanostructured sulphonated polyaniline and transition metal single, binary and ternary mixed oxide doped nanocomposites with electro-conductive properties. These nanocomposites were anchored on activated graphitic carbon and used in design of asymmetric supercapacitors. Tantalum(IV)oxide, tantalum(IV)oxide-nickel(II)oxide, tantalum(II)oxide-manganese(III)oxide, tantalum(II)oxide-nickel(II)oxide-manganese(II,III)oxide nanoparticles were synthesised using modified sol-gel methods. These were then dispersed, individually, in acidic media through sonication and incorporated in-situ into the polymeric matrix during the oxidative chemical polymerization of aniline doped with poly(4-styrene sulphonic acid). These novel polymeric nanocomposites were characterised with FTIR, UV-visible, TEM, SEM, EDS, XRD to ascertain successful polymerization, doping, morphology and entrapment of the metal oxide nanoparticles. SECM approach curves and interrogation of CV revealed that these nanocomposites are conductive and electro-active. The cells showed good supercapacitor characteristics with high specific capacitances of 170.5 Fg⁻¹ in TaO₂- PANi-PSSA, 166.1 Fg⁻¹ in TaO₂-NiO-PANi-PSSA, 248.4 Fg-1 in TaO-Mn₂O₃-PANi- PSSA and 119.6 Fg⁻¹ in TaO-NiO-Mn₃O₄-PANi-PSSA. Their corresponding energy densities were calculated as 245.5 Whg⁻¹, 179.4 Whg⁻¹, 357.7 Whg⁻¹ and 172.3 Whg⁻¹ respectively. They also gave respective power densities of 0.50 Whg⁻¹, 0.61 Whg⁻¹, 0.57 Whg⁻¹ and 0.65 Whg⁻¹ and showed good coulombic efficiencies ranging between 77.97% and 83.19%. These materials are found to have a long cycle life and therefore good electrode materials for constructing supercapacitor cells.
National Research Foundation (NRF)
Kandory, Ahmed ismail kareim. "Localized modification of conducting and insulating substrates (gold, copper, metal ion-doped sol-gels) by scanning electrochemical microscopy. Application to direct writing". Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2076.
Pełny tekst źródłaNowadays, the modification of surfaces has drawn more attention due to its variety of applications in various domains. Therefore, the purpose of this thesis deals with the localized modification of surfaces in mild condition by using the scanning electrochemical microscope (SECM) instrument. As a proof of concept for direct writing, different strategies have been used for surface modifications through removing surface materials, grafted organic layer and changing the chemical structure of the surface. Gold wafer and glass surfaces were the main substrates which have been modified since these materials are very used especially in nanotechnologies. This dissertation is conducted in four chapters and the first one focuses on SECM technique and surface modifications in general. The three other parts concern the work performed to validate the concept of direct writing. In the first part, metal ion (copper and gold)-doped silica matrices have been prepared by the well-known sol-gel method. Copper and gold metallic particles are produced locally by using the SECM in feedback mode with mediators such as methyl viologen and p-benzoquinone. The diameter of ultramicroelectrode (UME) tip and hydrolysis period were factors taken into account to study the effect on the size of electrogenerated metallic spots. In the second part, the localized wet etching of gold surface has been achieved by using SECM where a dimethylsulfoxide-based electrolyte charged with iodine is used. In this method an UME probe is positioned (at a known distance) close to the gold surface. Friendly environment method was used as etching process to generate electrochemically triiodide ion at the platinum UME tip, acting as an oxidant for gold surface. he third part includes two different experimental works. The first one covers the electrochemical reduction on gold electrode of diazonium salt prepared from ethylenediamine, an aliphatic diamine molecule. For the first time, the covalent functionalization on gold of a diazonium salt is demonstrated, and required diazotization of one amine group from ethylenediamine. In the second work, glass substrate was grafted by 3-aminopropyl silane film which was performed by sol-gel method. Then the modified-glass slide was functionalized by glutaraldehyde solution in order to immobilize tyrosinase molecules. Finally, the feedback mode of SECM has also been used to monitor the catalytic activity of tyrosinase. The tip of ultramicroelectrode was positioned close to the enzyme-modified surface and was scanned horizontally in x-y plane while measuring current from re-generated mediator molecules was carried out
Streszczenia konferencji na temat "Scanning Gel Electrochemical Microscopy (SGECM)"
Abraham, Jeffin James, Umair Nisar, Haya Monawwar, Aisha Abdul Quddus, Abdul Shakoor, Mohamed Saleh, Ramazan Kahraman, Siham Al-Qaradawi i Amina Aljaber. "SiO2 Coated Li-rich Layered Oxides-Li1.2Ni0.13Mn0.54Co0.13O2 for efficient energy storage applications". W Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0005.
Pełny tekst źródłaVajandar, Saumitra K., Dongyan Xu, Deyu Li, Dmitry Markov, John Wikswo i William Hofmeister. "SiO2-Coated Porous Anodic Alumina Membrane for Electroosmotic Pumping". W ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15002.
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