Si(100)1 x 1-Sb and Si(100)2 x 1-Sb surfaces studied with angle-resolved photoemission and surface differential reflectivity.
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Biomedical subjects
Publications and source records attributed to G Chiarotti.
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Uncoated DNA molecules marked with an activated tris(l-aziridinyl) phosphine oxide (TAPO) solution were deposited on gold substrates and imaged in air with the use of a high-resolution scanning tunneling microscope (STM). Constant-current and gap-modulated STM images show clear evidence of the helicity of the DNA structure: pitch periodicity ranges from 25 to 35 angstroms, whereas the average diameter is 20 angstroms. Molecular structure within a single helix turn was also observed.
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