Dell 3100 Spezifikationen Seite 212

  • Herunterladen
  • Zu meinen Handbüchern hinzufügen
  • Drucken
  • Seite
    / 376
  • Inhaltsverzeichnis
  • FEHLERBEHEBUNG
  • LESEZEICHEN
  • Bewertet. / 5. Basierend auf Kundenbewertungen
Seitenansicht 211
Scanning Tunneling Microscopy (STM)
Etching Tungsten Tips
192 Dimension 3100 Manual Rev. D
11.6 Etching Tungsten Tips
You can purchase tungsten tips from Veeco or make them yourself. This section describes the
process of etching tungsten tips for use with the NanoScope.
Materials Required
•Variac auto transformer
Optical microscope (20-100X)
Sodium nitrite (NaNO
2
)
Distilled water
Ethyl alcohol
•WD-40 (anti-oxidant)
•Two 50ml beakers
•Tipholder
Platinum wire
•Tungsten Wire, 0.010" Diameter
•Miscellaneous Wire/Clips
11.6.1 Procedure
1. Mix a 5 percent (by weight) solution of Sodium Nitrite in water.
2. Pour 40ml of the Sodium Nitrite solution into a beaker.
3. Pour 40ml of WD 40 into a beaker.
4. Construct an electrode out of the platinum wire and insert it into the beaker.
5. Adjust the variac for 30V, and with it Off, connect one output to the platinum electrode.
6. Cut 10 to 12 pieces of tungsten wire 1.25cm long. Before etching, check to make sure that
at least one end of the wire has not split by inserting the ends into a tip holder. If an end has
split, you will not be able to insert it into the tipholder. You can etch the end that has split,
however, preserve the unspoiled end.
Seitenansicht 211
1 2 ... 207 208 209 210 211 212 213 214 215 216 217 ... 375 376

Kommentare zu diesen Handbüchern

Keine Kommentare