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 Copy

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.

Graduation Semester

2021-12

Type of Resource

Thesis

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http://hdl.handle.net/2142/113844

Copyright and License Information

Copyright 2021 Allan Sykes

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