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STM Tips

STM Tips. Piezo actuators. Atomically Sharp Tips:. Z. X. Y. DC Bias. 28 th March 2005. Charlie Sykes. STM Tip Etching. 1A/10V. W Anode. Pt Cathode. KOH (3M). 28 th March 2005. Charlie Sykes. STM Tip Etching. Omicron Instruments. Homemade. 28 th March 2005. Charlie Sykes.

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STM Tips

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  1. STM Tips Piezo actuators Atomically Sharp Tips: Z X Y DCBias 28th March 2005 Charlie Sykes

  2. STM Tip Etching 1A/10V W Anode Pt Cathode KOH (3M) 28th March 2005 Charlie Sykes

  3. STM Tip Etching Omicron Instruments Homemade 28th March 2005 Charlie Sykes

  4. STM Tip Etching 10X 50X Optical Microscope: 28th March 2005 Charlie Sykes

  5. STM Tip Etching SEM Images (Lou Deguzman): Fast Etch (10sec) Slow Etch (180 sec) 28th March 2005 Charlie Sykes

  6. STM Tip Etching SEM High Magnification: Fast Etch (10sec) Slow Etch (180 sec) 28th March 2005 Charlie Sykes

  7. STM Tip Etching EQUIPMENT NEEDED: 0.25 mm Tungsten Wire for Cathode Platinum or Platinum/Iridium (80:20) for Anode 3 mol/dm3 KOH Solution Methanol (add 168g of KOH pellets to 1 liter of deionized water SLOWLY with stirring - DO NOT ADD WATER TO PELLETS, A LOT OF HEAT IS GIVEN OFF) PROCEDURE: Fill beaker with KOH solution Add electrodes Connect power supply Turn up current to ~0.8 A for slow etch, ~1.2 A for fast etch Once wire breaks turn off power Rinse new tip in deionized water and methanol a few times 28th March 2005 Charlie Sykes

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