Development of a dynamic environmental transmission electron microscope for the study of light-induced dynamics in nanoscale materials
Sykes, Allan Eugene
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https://hdl.handle.net/2142/113844
Description
Title
Development of a dynamic environmental transmission electron microscope for the study of light-induced dynamics in nanoscale materials
Author(s)
Sykes, Allan Eugene
Issue Date
2021-11-22
Director of Research (if dissertation) or Advisor (if thesis)
van der Veen, Renske M
Doctoral Committee Chair(s)
van der Veen, Renske M
Committee Member(s)
Zuo, Jian-Min
Jain, Prashant
Vura-Weis, Josh
Department of Study
Chemistry
Discipline
Chemistry
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Transmission Electron Microscopy, Ultrafast
Abstract
In this dissertation we present the development and characterization of a unique dynamic environmental transmission electron microscope (DETEM) which combines ultrafast laser spectroscopy with high-resolution electron microscopy. The novel instrument is capable of capturing snapshots of evolving nanostructures, such as individual nanoparticles, and soft materials undergoing temperature-, gas-, voltage-, or light-induced chemical transformations on time scales ranging from femtoseconds-milliseconds. We demonstrate the successful use of the new instrument by a comprehensive study of the picosecond-resolved dynamics of a three dimensional electron gas in vacuum subject to a static magnetic field, as well as preliminary single-nanoparticle studies of metal-oxide and metal-organic framework materials that undergo photoinduced phase transitions between structures with different electrical and magnetic properties.
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