Nanometer-Scale Local Hydrization of the Si(111)-(7×7) Surface Using an STM Tip
The Si(111)-7×7 surface can be locally hydrized at the nanometer scale by depositing H atoms from an STM tip. The H atoms are supplied to a Pt tip through dissociative adsorption of gaseous H2 and are deposited onto the Si(111)-7×7 surface by field evaporation. The deposition of H atoms occurs for the Pt tip but not for Au, Ag and W tips because H2 is not adsorbed on the Au and Ag tips and an insulating hydride layer is formed on the W tip. By continuously depositing H atoms from the Pt tip with the tip being scanned, we can draw any nanometer-scale patterns on the surface.
KeywordsScanning Tunneling Microscope Tunneling Current Scanning Tunneling Microscope Image Natural Defect Dissociative Adsorption
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