Author/Authors :
Pace، نويسنده , , Giuseppina and Venanzi، نويسنده , , Mariano and Castrucci، نويسنده , , Paola and Scarselli، نويسنده , , Manuela and De Crescenzi، نويسنده , , Maurizio and Palleschi، نويسنده , , Antonio and Stella، نويسنده , , Lorenzo and Formaggio، نويسنده , , Fernando and Toniolo، نويسنده , , Claudio and Marletta، نويسنده , , Giovanni، نويسنده ,
Abstract :
The rich topography of a self-assembled monolayer formed by a helical hexapeptide chemisorbed on a gold surface has been investigated by scanning tunneling microscopy under ultra high vacuum conditions (UHV–STM). STM experiments revealed a complex morphology of the peptide layer, showing nanometric-ordered domains lying on the gold surface (stripes) and a predominant phase at high local peptide concentration (holes). Diffusion of gold–peptide adsorbates on the gold surface, leading to coalescence of the hole structures at room temperature, was also detected.
Keywords :
Helical peptides , Scanning tunneling microscopy , SELF-ASSEMBLY , Surface structure and topography , Chemisorption
