Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 27 for “"Secm"”.
-
DEVELOPMENT AND APPLICATIONS OF SCANNING ELECTROCHEMICAL MICROSCOPY (SECM)
Scanning electrochemical microscopy (SECM) is a novel surface analysis technique which can exhibit local chemical information at a sub-micron scale. SECM has been applied in many fields, such as determination of electron transfer and ion transfer at liquid/solid, reactivity/conductivity, or …
-
Characterization of catalytically active solid liquid interfaces by scanning electrochemical microscopy (SECM)
Die elektrochemische Rastermikroskopie wurde genutzt zur quantitativen Untersuchung von Biosensorkomponenten. Der Feedback Modus wurde eingesetzt, um Titannitrid Dünnschichtelektroden auf ihre mögliche Eignung als Elektrodenmaterial zu untersuchen. Es wurde nachgewiesen, dass eine vergrößerte …
-
Novel Applications of Scanning Electrochemical Microscopy
Scanning Electrochemical Microscopy (SECM) is most commonly used to spatially resolve reaction rates, image surface topography and surface reactivity. In this research, SECM is applied to various chemical systems in order to resolve local reaction chemistry and to produce patterns with dimensions …
-
Flexible microelectrode probes for scanning electrochemical microscopy – from concept to high-throughput applications
… als neue Elektrochemische Rastersondenmikroskop (SECM)-Sonden entwickelt um ein Hochdurchsatz-Abrastern und -Modifizieren flacher, gekippter und gebogener Oberflächen durchzuführen. Die Arrays wurden auf dünnen Polymer-Trägern wie Polyethylenterephthalat- oder Polyimid-Folien hergestellt, die für …
-
Dye regeneration kinetics in dye sensitized solar cells studied by scanning electrochemical microscopy
… Hilfe eines elektrochemischen Rastermikroskops (SECM) im Feedback-Modus untersucht. Dazu wurden Modell-DSSCs bestehend aus mit Eosin Y oder Indolinfarbstoff (D149) sensibilisiertem Zinkoxid, bzw. mit Rutheniumfarbstoff (N719) sensibilisiertem Titandioxid in Iodid/Triiodid-Elektrolyt (I /I3 ) …
-
Probing structure-function relationships at catalytic surfaces with emerging electroanalytical tools
… reactivity. Scanning electrochemical microscopy (SECM) is a powerful tool for probing local electrochemical reactivity at operating electrochemical interfaces. Recently, the surface interrogation mode of scanning electrochemical microscopy (SI-SECM) was introduced to allow the measurement of the …
-
Revealing ion transfer kinetics and charge dynamics at operating battery materials through scanning electrochemical microscopy
… tools, scanning electrochemical microscopy (SECM) provides broad opportunity for understanding interphase formation and evolution, measuring single particles, and mapping electrode function. This work presents the development of multiple electroanalytical methods based on SECM to evaluate …
-
Wavelength swept spectrally encoded confocal microscopy for biological and clinical applications
Spectrally encoded confocal microscopy (SECM) is a technique that facilitates the incorporation of confocal microscopy into small, portable clinical instruments. This would allow in vivo evaluation of cellular and sub-cellular features in a non-destructive, minimally invasive manner. Prior studies …
-
Examining the Effects of Applied Potential on the Surface Charge of Functionalized Monolayers for Site-Directed Ionic Self Assembly
… Since scanning electrochemical microscopy (SECM) relies on modulation of feedback current underneath a ten-micrometer platinum tip, SECM provides a means for monitoring of potential-driven surface charge modulation. Experiments presented in this dissertation will show that in addition to …
-
Scanning electrochemical microscopy with conducting polymer probes: Validation and applications
Scanning electrochemical microscopy (SECM) is a useful technique for exploring redox and ionic processes on active materials. Here we explore how conducting polymers (CPs) offer several advantages as probe electrode material, given its versatility in the measurement of redox and ionic processes, …
-
Imaging of Caenorhabditis Elegans with Near Infrared Spectrally Encoded Confocal Microscopy
… known as spectrally encoded confocal microscopy (SECM), for label-free imaging of C. elegans. The developed system utilizes near-infrared illumination in conjunction with refractive and diffractive optics to instantaneously image a confocal image line at a speed of up to 147 kHz with lateral and …
-
Coupling Raman spectroscopy and scanning electrochemical microscopy for spectroelectrochemical analysis of electrode interfaces
… of combined scanning electrochemical microscopy (SECM) and Raman spectroscopy. Through alignment of a laser line to the same location of a SECM probe, the surface of a material can be analyzed in situ by co-localized, temporally matched methods. We applied this setup to study electrode interfaces …
-
Single layer graphene as a stable and transparent electrode for the measurement of non-aqueous electrogenerated chemiluminescence and charge transfer inverse photoemission
… through Scanning Electrochemical Microscopy (SECM) in the generation/collection mode. The transparency of graphene was used to obtain accurate spectral responses in ECL: while inner filter effects are known to cause a shift in peak emission wavelength of spectroelectrochemical studies, the use …
-
Spatially resolved ionic measurements with scanning electrochemical microscopy
… scanning electrochemical microscopy (CV-SECM) and associated methods. This maximizes spatial resolution of substrate ionic reactivity while also minimizing threats to the integrity of the probe. I then improve the sensing platform, delineating a reproducible protocol for generating Hg …
-
High-throughput characterisation and device integration of nanomaterials
… spectroscopic ellipsometric contrast microscopy (SECM) for mapping twist angle disorder in optically resonant twisted bilayer graphene. Ellipsometric angles were optimised to enhance the image contrast based on measured and calculated reflection coefficients of incident light, allowing the mapping …
-
Mercury Amalgam Electrodeposition on Metal Microelectrodes
… for scanning electrochemical microscopy (SECM) and electroanalysis. But as applications require more and more precision, fundamental questions concerning the exact shape and constitution of the amalgam can become important for interpreting SECM experimental data. The purpose of this study …
-
Probing the electrochemical dynamics of soluble redox active polymers
… and scanning electrochemical microscopy (SECM). Herein, we characterize the charge transfer mechanisms, identify the impact of backbone tether length and structure, demonstrate the role of the composition of the supporting electrolyte, and explore how electrostatic interactions and …
-
Electrochemical investigation of platinum nanoparticles supported on carbon nanotubes as cathode electrocatalysts for direct methanol fuel cell
… (PIXE), scanning electrochemical microscopy (SECM) and Brunauer-Emmett Tellar (BET) were also used.
-
Novel approaches to engineer glucose biosensors
… consistent. Scanning Electrochemical Microscopy (SECM) was used to spatially resolve glucose diffusion through the membrane by measuring the consequent hydrogen peroxide release and compared with an epoxy- polyurethane membrane.
-
Developing electrochemical methodologies towards addressing challenges in flow energy conversion technologies
… fundamental interfacial characterization, an SECM-based spot analysis methodology was established that quantifies heterogeneous electron transfer kinetics and identifies deviations from ideal electrochemical behavior at carbon electrode interfaces. Building on these diagnostic capabilities, a …
Page 1 of 2