Off-campus WSU users: To download campus access dissertations, please use the following link to log into our proxy server with your WSU access ID and password, then click the "Off-campus Download" button below.
Non-WSU users: Please talk to your librarian about requesting this dissertation through interlibrary loan.
Access Type
WSU Access
Date of Award
January 2023
Degree Type
Dissertation
Degree Name
Ph.D.
Department
Chemistry
First Advisor
Wen Li
Abstract
Modern-day scientists seek to illuminate the secrets of natural phenomena that can be experienced in almost all facets of everyday life. At the most fundamental level, the motions of electrons drive the underlying processes that occur in chemistry, physics, and biology. Capturing these motions in real-time could potentially lead the way to controlling chemical reactions, which would fulfill the long sought-after vision shared by chemist. Over the past 100 years, in a relatively short amount of time the exponential growth of technology has led to rapid development of sophisticated instrumentation and techniques to take ‘pictures’ and ‘movies’ of chemical reactions. One of the most popular imaging techniques used in chemical dynamic, atomic, molecular, and optical (AMO) physics is 3D momentum imaging.In this dissertation, the development and application of 3D momentum imaging along with clever spectroscopic techniques are used to investigate the dynamics in a variety of atomic, molecular, and surface systems. Significant differences in laser desorption ionization mechanisms that are dependent on the pulse duration were revealed through the 3D ion momentum images. The shorter pulse durations could be exploited in MALDI experiments to enhance the sensitivity for detecting biomolecules. Using 2D ion imaging and CEP measurements the ejection direction of dissociated molecule can be controlled. Finally, we demonstrate the power of the phase-resolved 2-electron angular streaking (PR-2eAS). This technique was able to capture the ultrafast hole- filling dynamics within the first 1.2 fs in xenon.
Recommended Citation
Stewart, Gabriel Andrew, "Imaging Ultrafast Dynamics In Molecules And Surfaces" (2023). Wayne State University Dissertations. 3809.
https://digitalcommons.wayne.edu/oa_dissertations/3809