WEEK+OF+OCTOBER+7TH

=**WEEK OF OCTOBER 7TH**=

NONE..

becky and i talked about stm more deeply. Actually even though i knew already basic concept of stm i really did not understand how it works actually. But beck explained that really well to me. We talked about the electrons first. When i increase or decrease the voltage, i really thought the electrons are coming out of the tip and see the atoms of surface. But it was actually not coming out of the tip but is being in the surface atoms. So when we change the voltage, the electrons move there position of level of energy. We talked also about piezo which recognizes how far the distance between the surface and the tip. When we make the tip to be too closer to the surface it actually recognizes the distance between them is too close each other so make the tip move little bit farther away from the surface so it does not go thorugh. And amps are handled when we want to make a change of distance between the tip and the surface. And i was wandered the point of changing the value of amps since the piezo gets recognized and it manipulate the distance between tip and the surface. The reason was that when we not have the value of amps, eventhough the tip actually is seeing the surface, it might be not doing that. so that is why we need to handle the distace between tip and the surface. Maybe piezon works for a little bit of gaps and amps works for big distance. I also heard about homebuilt stm and becky showed it to me so i could know how it seems like. it had very interesting looking. if i have time later, i want to try the himebuilt stm.
 * 10-09-09**

(actually the tip did not approach today so i could not get the image.. sorry:(