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Adsorption and Thin-Film Adhesion on Single-Crystalline Surfaces: Enthalpies, Entropies, and Kinetic Prefactors for Surface Reactions
(2014-02-24)
Chemical bonding at solid surfaces and interfaces is influential in a wide range of important technological applications including catalysis, fuel cells, batteries, chemical sensors, and device fabrication for microelectronics, computers, solar cells, and all variety of coatings. Adsorption and adhesion energetics are key ...
Application and Development of 2D IR Spectroscopy for the Study of Complex Biological Systems
(2014-02-24)
One of the many applications of 2D IR spectroscopy is in the study of structure/function relationships in proteins. While this technique can be used for structural characterization, the power of this tool is with its ability to provide timescales for the structural dynamics of a system in solution with picosecond time ...
Characterization of the Structure and Dynamics of Biomimetic Peptides by Solid-State NMR
Diatoms and sponges use proteins, long chain polyamines, and other biomolecules to assemble silica structures of controlled morphology. Investigated here are biosilicification peptides. Under mild conditions, these peptides produce silica nanoparticles from solutions of silicic acid, whereas harsh methods are currently employed ...
Towards Accurate and Efficient Description of Excited States
The microscopic and molecular-level characterization and understanding of excited states properties and dynamics plays an important role in modern scientic research. Tremendous examples can be found in photovoltaics, photocatalysis, spintronics, and plasmonics. Over the past several decades, despite progress towards this ...
Photochemical dynamics of laser-irradiated semiconductor nanostructures
Unique and novel applications of nanoscale materials are continuously being found. Applications span across many fields, including medicine, physics, chemistry, and engineering. Properties of nanoparticles are commonly studied through laser-mediated experiments, but the intense fields generated by laser light will often ...
Positive Encounters: An Investigative Study on the Effects of Interactions between Cations and Quantum Dots
Semiconductor nanocrystals, also known as quantum dots (QDs), have gained much popularity in recent years not only in the researching community but also in general public. Within researching circles, there are many areas of application that are studies are honing in from the QDs utilization in cellular imaging to light-emitting ...
Adsorption and adhesion energies of metal films and nanoparticles studied by adsorption calorimetry: understanding catalytic systems
Metal nanoparticles dispersed across solid surfaces form the basis of many important technologies such as heterogeneous catalysts, electrocatalysts, chemical sensors, microelectronics, and fuel cells. Understanding energetics of chemical bonding between the metal and oxide in these systems is important for the development ...
Local Imaging of Optoelectronic Properties and Film Degradation in Polymer/Fullerene Solar Cells with Electrostatic Force Microscopy
With power conversion efficiencies on the rise, organic photovoltaics (OPVs) hold promise as a next-generation thin-film solar technology. However, both device performance and stability are inextricably linked to local film structure. Methods capable of probing nanoscale electronic properties as a function of film structure ...
Insight into Biological Small-Molecule Activation from Enzymes, Model Complexes, and X-ray Spectroscopy
This dissertation covers the investigation of biological strategies for activating inert small molecules. Chapters 1 and 2 respectively present an introduction to some notable biological systems of interest and the X-ray spectroscopic techniques used in their study. Chapter 3 focuses on the application of X-ray spectroscopy ...
Correlating Electronic and Nuclear Motions in Ultrafast Photoinduced Charge Transfer Reactions with Femtosecond Multidimensional Spectroscopies
(2013-07-23)
Photochemical reactions in solution are probed using femtosecond multidimensional infrared spectroscopies to elucidate the role high-frequency vibrations play in condensed phase charge transfer processes. In all cases presented in this thesis, electronically excited molecules adjust the position of nuclei in unique ways to ...