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 12 of 12 for “"In-situ spectroscopy"”.
-
Multimodal in-situ spectroscopy of novel enzyme mimics with optofluidic microreactors
Photocatalysis plays a key role in ensuring a more sustainable future through harnessing the power of the sun for solar fuel production, degrading harmful environmental pollutants and driving the green synthesis of valuable organic products. Despite their significant potential, the current …
-
IN SITU SPECTROSCOPY INVESTIGATION OF ALKALI METAL INTERACTION MECHANISM WITH ORGANIC SEMICONDUCTOR FOR STABILIZING ALKALI METAL ANODES
… metal batteries (SMBs) have emerged as promising candidates for next-generation rechargeable devices. However, the uncontrollable growth of sodium dendrites remains a significant challenge in achieving stable cycling performance and safety, thereby impeding the practical application of SMBs. …
-
Printed microscale inorganic light emitting diodes on flexible substrates for display, biomedical, and robotic applications
… electronics can offer various advantages such as intimate, conformal contacts to curvilinear surfaces and a high level of tolerance to an external strain over the conventional devices integrated on rigid platforms. With suitable choices of materials, design, and integrating strategies, inorganic …
-
Reconstruction of Rhodium Clusters During CO Oxidation and Consequences on The Reaction Mechanism
Heterogeneous catalysis plays a significant role in the chemical industry and the global economy. Most heterogeneous catalysts in the chemical industry and laboratory consist of supported metal nanoparticles, clusters and isolated (single) atoms. Understanding structure sensitivity and identifying …
-
In-Situ Spectrocopy: Gas Mixture Analysis Using A Simplified Multi-Pass Capillary Cell and Optical Considerations In Dual-Pulse Laser-Induced Breakdown Spectroscopy Analysis of Bulk Aqueous Solutions
<p>This thesis describes two methods investigated for their uses as tools for in-situ spectroscopy. As knowledge in the Chemical Sciences as well as technology progress, scientific questions are encountered that require analyses to be performed in-situ due to concerns that sampling and sample …
-
Interactions between catalysts and oxygen carriers in chemical looping processes
… a reactive metal oxide, applied for chemical looping processes, using Ag/SrFeO3−δ as a model system. In chemical looping processes, lattice oxygen is provided from a metal oxide (termed the oxygen carrier) to generate purified oxygen, or, to react with a reducing gas (e.g. a hydrocarbon) to form …
-
A Study of Novel Nitrogen-Containing Quinoidal Electrolytes for Redox Flow Batteries
… with their decoupled power and capacity scaling are a promising energy storage technology. However, low energy density and high capital costs stymy such systems. For this reason, novel electrolytes are under active development. Previous electrolytes have involved a variety of metal-containing …
-
Development and Application of in Situ/Operando Spectroscopic Techniques for Understanding Active Sites and Surface Intermediate Species in Heterogeneous Catalysis
… of complex catalytic systems, enabling detailed insights into catalyst structures, reaction intermediates, and mechanisms. This thesis presents the application of innovative methods, including in situ transient Raman spectroscopy, Differential Derivative Reflectance (DDR) UV-Vis …
-
Interactions of biomass derived oxygenates with heterogeneous catalysts in aqueous and vacuum environments
Biomass is one of the most promising replacements for fossil fuels as a feedstock for chemical and transportation fuel production. The combination of low vapor pressure and high polarity of most biomass derived molecules makes water the ideal solvent for biomass upgrading reaction schemes. Metal …
-
Atomic-level Insights Into Atomically Dispersed Metal Catalysts
… metal catalysts have demonstrated promise in heterogeneous catalysis with both nearly 100% utilization efficiency of precious metals and high intrinsic activity of metal sites. As an emergent type of atomically dispersed metal catalysts, single-atom catalysts (SACs) have been extensively …
-
Donor-Acceptor Block Copolymers in Organic Electronics - Spectroscopy, Charge Transport, Morphology and Device Application
Organic electronic devices have attracted increasing attention over the last decade. The use of organic materials allows the creation of large area, flexible and low-cost lightemitting devices, transistors and photovoltaics. The development of new organic materials contributes to a successful …
-
Toward data-rich approaches to understanding colloidal semiconductor nanocrystals and quantum-dot LEDs
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01