Adsorption of Methyl (CH3) and Methylnitrene (NCH3) Radicals on Cu Surfaces Studied by Scanning Tunneling Microscopy

概要

論文の詳細を見る
Formation of two-dimensional islands of methyl radical (CH3) on Cu(111) and Cu(110) surfaces, and methylnitrene radical (NCH3) islands on Cu(110) was studied with scanning tunneling microscopy. In all cases, close-packed or nearly close-packed two-dimensional islands were observed. We found that (1) chemisorbed CH3 aggregated into a ($\sqrt{3} \times \sqrt{3}$)-$R30$° island structure that was more readily observed at $T<90$ K. (2) CH3 aggregated into a $c(2 \times 2)$ island structure on Cu(110), and (3) NCH3 on Cu(110) formed $ p(2 \times 3)$ islands. Plausible structural models for these systems have been suggested previously. Here we further investigate their dynamic and static structural details, with focus on (1) temperature dependence of CH3 island evolution on Cu(111); (2) comparison of island structure of CH3 on Cu(110) and Cu(111); and (3) Cu adatom incorporation in NCH3 islands on Cu(110).
2006-03-30