Truxene and Octanethiol on Gold

DH

February 11, 2008

Sample Prep

• Drop cast truxene previously dissolved in toluene

• Let dry

• Vapor deposit octanethiol– 17 hrs– 74 Co

• Blow Hydrogen Gas to remove any particles on surface

Steps

The image show the steps in gold and there is a bold one. Also it shows

pits.

Interesting

A bright dot is appreciated.

Swiss melted cheese

A column dividing this two planes

Lets try to get more detail

There is gold and a bright dot and then there is the Swiss cheese

Swiss cheese

There is definitely something but it looks like unorganized octanethiol.

While the whitish seen could be truxene

Look at another area

Layers of Gold but we see little bright dots forming a curve and

fuzziness around it

Closer look at fuzzeness

Octanethiol in an unsual formation.

Analysis and Conclusion

• a swiss melted cheese  image -->  the tip had  something  around it and even though the current was there. So as the tip was scanning this thing was scratching the sample and trowing the molecules elsewhere. That caused several alterations1) fuzzy area2) octanethiol to appear in a funny unorganized pattern not usual for this molecule

Cont…

• Drifting caused the image to portray a vertical chain of pattern

• Bright dots where gold steps