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Refractory Metal STM Tips
Applied Physics Technologies has extensive experience in the fabrication of single-crystal tungsten wire, and its use in electron emission sources. Our single crystal wire is produced in a zone refining process that ensures both a very high level of purity and a specific axial orientation. APTech's mount design minimizes the length of single crystal wire (SCW) required, thus keeping costs low.
Resolution can be improved with atomically sharp tips, but at the expense of tip lifetime. By using single crystal probe materials, it may be possible to achieve comparable resolution with less sharp tips, thereby increasing probe lifetime.
Currently, STM tips are etched from drawn tungsten wire which has a natural (110) orientation on axis. This (110) plane has the highest work function at approximately 5.25 eV and low work function plains ((210) and (310)) that emit off-axis. We offer STM tips with low work function plane on axis that will alleviate these issues.
View Additional STM Tips Information
Due to electrostatic charge damage during shipping, APTech is no longer selling etched STM probes. However, we can assist you with this process. Please Contact Us for more information on STM Tips.
