The study of nanomaterials in a liquid environment can provide insight to processes and dynamics with applications to energy storage materials, catalysis, nanomaterial growth and biological structures. For these applications we have developed techniques for the use of a dedicated in situ fluid holder in combination with aberration corrected scanning transmission electron microscopy (STEM) and dynamic transmission electron microscopy for imaging nanomaterials at atomic-scale resolution within a fluid layer. The abilities of the in situ fluid holder for STEM have been tested by comparing the SiN window thicknesses to optimize imaging conditions and the use electron energy loss spectroscopy to accurately measure the fluid path length within the cell and provide chemical analysis. The imaging artifacts caused by the high energy scanning electron beam have been investigated to determine the causes of bubbling, contamination and charging within the fluid cell for strategies to mitigate these effects. The use of the DTEM has demonstrated the growth of lead sulfide nanoparticles from a precursor solution by the sample drive laser separate from the imaging electrons. These techniques present the ideal platform for future studies of biological structures and dynamics at physiological conditions under low dose imaging with high temporal and spatial resolution.
|Advisor:||Browning, Nigel D.|
|Commitee:||Arslan, Ilke, Browning, Nigel D., Takamura, Yayoi|
|School:||University of California, Davis|
|Department:||Materials Science and Engineering|
|School Location:||United States -- California|
|Source:||DAI-B 73/10(E), Dissertation Abstracts International|
|Keywords:||Eels, Fluid cells, Hydrated materials, Liquid cells, Nanomaterials, Stem, Tem|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be