Abstract
A new method of imaging with the scanning tunneling microscope (STM) is used to study magnesium porphyrin (MgP) molecules adsorbed on Au(110) surface. Hydrogen molecules are deposited onto the surface and diffuse freely until temporarily trapped in the tunnel junction. The vibrational and rotational modes of the H2 are monitored with inelastic electron tunneling spectroscopy with the STM. The MgP presents the H2 with a highly localized position-dependent adsorption potential, which causes variations in the energies of both vibrational and rotational modes of the trapped H2 molecule. Imaging at the vibrational and rotational energies of H2 reveals salient features in the chemical structure of the MgP molecule, in particular, the positions of the nitrogen atoms. The electrostatic interaction between H2 and MgP plays a crucial role in determining the imaged features, which provide a visualization of the interaction potential within the MgP molecule.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
