| http://www.w3.org/ns/prov#value | - The obdurate coating 301 may have a thickness in the range of approximately 5 Angstroms to 1 micron. [0131] To allow operation in the STM mode and/or contain light energy within the tip 132, the tip 132 may be coated using conventional techniques with a thin layer 304 of a conductive material, such as aluminum, tungsten, or gold.
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