Observation of single helical peptide molecule incorporated into alkanethiol self-assembled monolayer on gold by scanning tunneling microscopy

Article Abstract:

The bicomponent self-assembled monolayers (SAMS) are formed by incorporation of helical peptides into the alkanethiol monolayer, and are characterized by Fourier transform infrared reflection-adsorption spectroscopy (FTIR RAS) and scanning tunneling microscopy (STM). FTIR RAS spectra indicate that the helical peptides are incorporated into the defects in the alkanethiol SAM without disturbing the film structure.

Science & research, Research, Usage, Monomolecular films, Scanning tunneling microscopy, Properties

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Effects of dipole moment, linkers, and chromophores at side chains on long-range electron transfer through helical peptides

Article Abstract:

Octadecapeptides carrying a ferrocene moiety at the molecular terminal are self-assembled on gold, and long-range electron transfer from the ferrocene moiety to gold is investigated by electrochemical methods. Effects on electron transfer of dipole moment of helical peptides, linkers connecting the peptide to gold, and chromophores introduced into the side are discussed.

Japan, All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Gold Compounds, Observations, Electron transport

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Molecular rectification of a helical peptide with a redox group in the metal-molecule-metal junction

Article Abstract:

A helical hexadecapeptide immobilized on gold through a thiophenyl group at the N-terminal is analyzed by scanning tunneling microscopy under ultrathin vacuum to obtain the I-V response at a molecular level. The molecular rectification behavior is due to the ferrocene unit regulating the direction of the electron transfer at the metal-molecule junction.

Analysis, Fourier transform infrared spectroscopy, Structure, Phenyl compounds

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