Project Goals!
It is understood that large polarizable
ions (i.e. the Iodine in NaI) tend to collect near
the air/water interface whereas smaller less polarizable ions (i.e. the
Fluoride in NaF) tend to collect near the bulk of the
liquid. This has been shown using electron spectroscopy; however, it is our
goal to show this using ellipsometry. We would also like to determine the
concentrations at which these behaviors begin to occur. It is our hypothesis
that sodium iodide, NaI, will need a very low
concentration to detect little or no ions at the air/water interface. On the
other hand, sodium fluoride, NaF, will need a very
high concentration to detect any ions at the air/water interface. Finally, it
appears that sodium iodide is light sensitive. If time allows, I would like to
check this theory by performing a 24 hour experiment to see if the amount of
time the solution is exposed to light makes a difference in our data.