INDIGO Home University of Illinois at Urbana-Champaign logo uic building uic pavilion uic student center

In-situ TEM and Spectroscopy of Structures and Processes in Graphene Sandwiches and Graphene Liquid Cells

Show full item record

Bookmark or cite this item: http://hdl.handle.net/10027/20956

Files in this item

File Description Format
PDF Wang_Canhui.pdf (6MB) (no description provided) PDF
Title: In-situ TEM and Spectroscopy of Structures and Processes in Graphene Sandwiches and Graphene Liquid Cells
Author(s): Wang, Canhui
Advisor(s): Klie, Robert
Contributor(s): Ansari, Anjum; Nicholls, Alan; Schlossman, Mark; Shokuhfar, Tolou; Takoudis, Christos G.
Department / Program: Physics
Graduate Major: Physics
Degree Granting Institution: University of Illinois at Chicago
Degree: PhD, Doctor of Philosophy
Genre: Doctoral
Subject(s): Graphene Liquid Cell Electron Microscopy EELS Radiolysis Chemical Reactor
Abstract: Recent developments in microfabrication technology have resulted a surge of interest in in-situ transmission electron microscopy (TEM). This dissertation will focus on in-situ imaging and spectroscopy of liquids and materials suspended in liquids using aberration-corrected scanning transmission electron microscopy. I have developed a novel approach to in-situ microscopy that allows the encapsulation of liquid-containing samples using monolayers of graphene. Transmission electron microscopy and spectroscopy is utilized to characterize several beam sensitive materials and processes in a liquid environment at atomic resolution, obtaining information including structures, elemental distribution, bonding information, even phase change and valence state transition in physical and biochemical activities. Radiolysis modeling is performed to assist liquid cell design, as well as control of electron microscope parameters, allowing liquid chemistry modulation by electronic signal. This also allows implementation of graphene liquid cells as nano-scale chemical reactors which enable the precise control of radial and ionic concentration for reaction kinetics modulation as a function of space and time. These approaches can be combined to solve problems in a liquid phase with unprecedented resolution.
Issue Date: 2016-07-01
Genre: thesis
URI: http://hdl.handle.net/10027/20956
Rights Information: Copyright 2016 Canhui Wang
Date Available in INDIGO: 2016-07-01
2018-07-02
Date Deposited: 2016-05
 

This item appears in the following Collection(s)

Show full item record

Statistics

Country Code Views
United States of America 181
China 82
Russian Federation 46
Germany 16
Ukraine 15

Browse

My Account

Information

Access Key