Week+of+July+7

Jun's Logbook
=Week of July 7=

__July 7__
Made sample in the morning. Drop-cast coronene on Au[111]. Octanethiol vapor deposit at ~75-78ºC. Inserted in the oven at 10:20. Left in oven for 24 hours.

__July 8__
Removed sample at 10:20. Let cool for ~1 hour.

Received custom sample holder with conical hole.

Ordered green laser pointer. (4 mW output power, 532 nm wavelength, 13 mm diameter x 143 mm length)

Images taken: 0070808 (00AE-00AP) Images poor: streakiness due to noise (construction).

__July 9__
Annette annealed and made octanethiol vapor deposit sample on Au[111] and another coronene drop-cast with octanethiol vapor deposit on Au[111]. To sit ~24 hrs. in ~75ºC.

Continued scanning with previous day's sample. Images are still streaky possibly due to construction outside next to the building.

Images taken:070908 (00AA-

__July 10__
Used octanethiol sample for images. A lot of streakiness in the images. Possibly construction?

Streakiness from noise continues to be prevalent. Used the spectroscopy data to find specific frequencies of the noise. The graph shows a lot of low frequency noise and a lot in the 50-60 mHz range. This may be due to an electrical issue.

Annette checked air table to adjust for apparent unevenness and the internal springs in the box to negate contact.

__July 11__
Noise greatly reduced from functional air table, but noise persists at smaller levels. Upon examination, the internal springs still are touching the STM. Adjustments made.

Problem yet to be resolved.