Week+of+July+21

Jun's Logbook
= = =__Week of July 21__=

__July 21__ Made drop-cast coronene and vapor deposit octanethiol on annealed gold. Inserted at 10:00A at 72ºC.

Took the scope out of the box to lower the springs even more to see if that negates more noise. The scope however is not cooperating, so I will try imaging after lunch.

__July 22__ Annette began scanning with the laser on with the slow scan turned off meaning the same line is scanned over and over. We can now analyze height differences when the laser is on and off with data produced by the program.

__July 23__ Began analyzing the data with MatLab.

The section graph of the image shows an approximately 200 Å height increase, indicating some sort of expansion.

__July 24__ Started working on a connection to let the scope know when the laser is on. This will require a little rewiring with a new DPST switch.

Need to try several setups to see what part of the sample is expanding due to the laser.

Things to try: Further isolating the sample with sheets of glass with varying thickness, possibly other materials such as rubber or plastic, thinning the mica base.

__July 25__ Tried scanning with a rubber ring isolating the sample. The scope is really drifty, so there has been no success in getting a good image.