WEEK+OF+JANUARY+6TH

The dibenjo (a,l) pentacene and the gold were placed in a vial and heated to 120degree from 2:18pm to 3:30

Today, I tried to see the image of dibenjo pentacene, but as usual, I could not see the image of it. Especially, today was unlucky because I could not even apporach it to the tip. Specifically, it does not approach, but it crashes when I push the "advance" button until it crashes. So it is kind of complicated situation to describe it verbally, but simply, there was a problem to apprach to the tip. Therefore, what I did first was to clean the cylinder off with ethonol because its been a while since we did STM last time, so we thought that there mignt be some dust on the cylinder. But it did not work. So second thing I did was to change the set points which are.. set point-0.55nA P-gain-26000 I-gain- 2600 Tip voltage- 5V (These st point are what Anna( Im not sure if this is right spellings..) used to use) But It still did not work either. Thus, what we thought the reason that it does not approach might be the fact that the desk was little bit tilted. Tilted area might affect doing STM( related to fraction and gravity stuff..) But, we kind of realized it does not do anything with the problem soon. So these are basically what I did today. Hopefully, I can get a good image someday!!

What we did toay is to try get images of dibenjo pentacene ( Last time, we could not do that because of the approaching problem) To fix the problem we did -cleaning the cylinder with ethonal and inside of the STM -chaing the tip
 * 01-08-10**

and finally got some images and I really could see the dibenjo pentacene 1nA 10000 1000 50MV 0.12 0.2 128 78 0.2 128 51 0.2 128

So the white little dots are dibenjo pentacene. It is almost impossible to look at actual structure of the molecule with the STM I am using becuase it is required to have really cold temperature and no vibration. But I will try my best and get some more variety images of dibenjo pentacene next time