Study of Novel Ion/surface Interactions Using Soft-landing Ion Mobility Page: 88
View a full description of this dissertation.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
6.3 Results and Discussion
6.3.1 Uranium Deposited on MPTES Modified Silicon
Initially, an ion mobility spectrum was collected of uranium to understand the
range of clusters being produced by the laser ablation source. Figure 33 shows the ion
1.2-
1 -
>0.8-
0.6
U)
C
~O4
0
*J 0.4 -
-0.2 I J , ' I , , I , I
0 0.005 0.01 0.015
Drift Time
Figure 30. Ion mobility spectrum collected at 5 Torr He pressure.
mobility spectrum collected from the laser ablation at 5 Torr. It was noted that the
spectrum at 10 Torr was similar. It is interesting to note that there are two distributions
that exist within the ion mobility spectrum. It is seen that examining the FWHM easily
differentiates these peaks. Figure 34 shows the presence of two distinct distributions by
graphing FWHM as a function can be attributed to the presence of excess air within the
ion mobility cell. It is known that the heats of formation for singly charged oxides of
uranium are on the order of 50 kJ/mol.153 Therefore, it is plausible that the low vacuum88
Upcoming Pages
Here’s what’s next.
Search Inside
This dissertation can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Dissertation.
Hoffmann, William Darryle. Study of Novel Ion/surface Interactions Using Soft-landing Ion Mobility, dissertation, December 2012; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc177214/m1/98/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .