Calibration standard for scanning probe microscope

[Lisa Yoonjoo Hwang]

Hi,

I'm a graduate student in Curt Frank's group in Chemical Engineering.  I
am in charge of maintaining and calibrating our DI Nanoscope AFMs.  I was
wondering if anyone has calibration standards we could borrow for a day or
two.  Specifically, we'd like to find high accuracy vertical calibration
standards.  We currently have vertical standards of SiO2 steps with +/-
1nm accuracy step heights, but we'd like to calibrate our scanners to even
higher accuracy (down to angstroms) since we have features on the order of
a few nanometers that we'd like to characterize.

If you have standards we might be able to borrow (or advice or
suggestions), please contact me at this email or at 650-723-9140 and it
would be greatly appreciated!

Thanks!
Lisa Hwang