posted by: lrose
July 10, 2009
after several hours of changing tips, reseating the sample and turning the sample on the holder, I finally go it to scan my sample. we prepared the sample by making a .331 molar solutions of CS2 and di-n-octylamine and adding them together in equal amounts.
Then put an annealled gold sample into the solution for 12 or more hours. This time we put the sample in about 4pm on the 8th and took it out about 9:30 on the 9th.
The sample was preserved in a sample bottle enclosed in aluminum foil. I tried to scan it on the 9th with very little success. After manipulating the controls and the sample, about 10:00 I finally got it to start scanning something that looks like gold layers.
These pictures have raised lots of questions in my mind about some of the structures I see and what I don’t see. I expected to see monolayers of dithiolcarbonmates, in similar patterns to the octothiols we scanned last year (with permission and help from Annette Raigoza using her research project), but I did not see any layers that looked like those.
What are those light specks in that seeminly flat area?
Is the large white cloudlike structure in the middle just trash?
Why won’t the STM let me scan area larger than 456nm?
As soon As I figure out how to save the pictures so I can copy them, I’ll put one up