TEM Pictures of STM Tips

TEM Picture of a cut STM Tip (Pt/Ir, 0.008" diameter). The image was taken before the STM experiment
200 kV, Bar length = 20 nm
Zoomed-in picture of the above area.
The end of cut tip is very sharp with a size less than 20 nm.

A higher magnification image of the end of the tip. Bar length = 10 nm.
Here you can see the oxide layer on the tip.

TEM pictures were taken by Elton Graugnard and Takhee Lee (Sep. 1999).

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Ron Reifenberger
Last modified: Fri Jul 19 11:28:33 EST 2002