Scanning Tunneling Microscopy (STM)
Etching Tungsten Tips
164
MultiMode SPM Instruction Manual
Rev. B
6. Verify that each of the op-amp’s wire leads is properly aligned with the appropriate hole,
then press the op-amp gently into its socket. Do not bend wire leads.
7. Replace the metal cover on the head. Retighten retaining screws to secure.
9.6
Etching Tungsten Tips
You can purchase tungsten tips from Veeco or make them yourself. This section describes the
process of etching tungsten tips.
Materials and Equipment Required:
•
Variac auto transformer
•
Optical microscope (20-100X)
•
Sodium nitrite (NaNO2)
•
Distilled water
•
Ethyl alcohol
•
WD-40 (anti-oxidant)
•
Two 50-ml beakers
•
Tipholder (see below)
•
Platinum wire
•
Tungsten Wire, 0.010" Diameter
•
Miscellaneous Wire/Clips
Metal tab at “10:00” position.
To remove, pull
To install, push
straight up.
straight down.
(Do not bend leads)
