Week+of+June+30

Jun's Logbook
=Week of June 30=

__June 30__
Discussed preliminary calculations for a laser with Dr. Kandel and Annette. Laser to be purchased ASAP. Results of the calculations should give one of the following results. 1.) The experiment is not possible because of too great a heat loss or to fast of a heat up. 2.) A large laser is necessary for the experiment. 3.) A small laser will suffice.

__July 1__
Discussed setup process. 1) The laser can either be inside the STM box or outside. If it is on the inside, the laser can simply be attached to one of the bars. However, this may create an additional heat source within the box, skewing the scanning. Having the laser on the outside would require an access hole (drilled or otherwise) creating a source of heat loss and entry. For preliminary attempts, the laser is to be set up on the inside. 2) A switch to control the laser would need to be set up outside the box. This will most likely be done by disassembling the laser switch and using an extension of wire to bring the switch outside the box. 3) A hole needs to be made in the sample holder. (Conical, Shelf, or top shaped?)

__July 2__
Sample holder to be cut with conical hole. 0.4 cm front hole, 1.0 cm back hole. The purpose of the conical cut is to have a flexible range that the laser can be shot from, but prevent the sample (~0.5 cm x 0.7 cm) from falling through.

Final discussions of laser calculations made.

Amount of heat loss approximated using the following procedure. 1) Approximate heat loss across the gold sheet (~0.5 cm x ~0.55 cm x 1500 Å) 2) Calculate heat loss through the mica backing (~0.5 cm x ~0.7 cm x 0.14 mm)

Made a sample using the usual process. Annealed the Au(111) sample for 5 minutes. Used coronene concentrate drops on the Au. Let dry. Put the sample with octanethiol in the oven at ~75º at 2:30 P.M. To be removed after 18 hours. (This is a slight change from the usual 24-hour sitting period. This change was made to allow for more coronene to remain on the surface and less octanethiol to take over)

__July 3__
Removed sample from oven at 8:40.

Pictures taken: 07030800AA, 07030800AB, 07030800AC, 07030800AD, 07030800AE, 07030800AF, 07030800AG, 07030800AH, 07030800AI, 07030800AJ, 07030800AK, 07030800AL, 07030800AM, 07030800AN, 07030800AO, 07030800AP, 07030800AQ, 07030800AR

__July 4__
National Holiday