Adsorption, manipulation and self-assembling of TBrPP-Co molecules on a Ag/Si(111) surface by scanning tunnelling microscopy

Qing Li, Shiro Yamazaki, Toyoaki Eguchi, Yukio Hasegawa, Howon Kim, Se Jong Kahng, Jin Feng Jia, Qi Kun Xue

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)

    Abstract

    Individual adsorption and two-dimensional assembling of 5,10,15,20-tetrakis-(4-bromophenyl)-porphyrin-Co (TBrPP-Co) molecules on a Si(111)- Ag reconstructed surface have been studied using low-temperature scanning tunnelling microscopy (STM). All the isolated molecules are observed in a planar shape with slight distortion. The isolated molecules can be controllably rotated with an STM tip to the orientation along the trigonal lattice ( direction) of the substrate. With an increased coverage (0.07 ML) and appropriate annealing, the molecules assemble to form three types of ordered phase. The long-range ordered structures, however, disappear at higher coverage (0.75 ML).

    Original languageEnglish
    Article number465707
    JournalNanotechnology
    Volume19
    Issue number46
    DOIs
    Publication statusPublished - 2008 Nov 19

    ASJC Scopus subject areas

    • Bioengineering
    • General Chemistry
    • General Materials Science
    • Mechanics of Materials
    • Mechanical Engineering
    • Electrical and Electronic Engineering

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