Journal
NANO RESEARCH
Volume 4, Issue 6, Pages 523-530Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-011-0108-y
Keywords
High-resolution scanning tunneling microscope (STM) imaging; functionalized STM tip; metal phthalocyanines; molecular orbital; density functional theory calculation
Categories
Funding
- Natural Science Foundation of China (NSFC)
- Ministry of Science and Technology (MOST)
- Chinese Academy of Sciences
- Shanghai Supercomputer Center
Ask authors/readers for more resources
High-resolution scanning tunneling microscope images of iron phthalocyanine and zinc phthalocyanine molecules on Au(111) have been obtained using a functionalized tip of a scanning tunneling microscope (STM), and show rich intramolecular features that are not observed using clean tips. Ab initio density functional theory calculations and extended Huckel theory calculations revealed that the imaging of detailed electronic states is due specifically to the decoration of the STM tip with O-2. The detailed structures are differentiated only when interacting with the highly directional orbitals of the oxygen molecules adsorbed on a truncated, [111]-oriented tungsten tip. Our results indicate a method for increasing the resolution in generic scans and thus, have potential applications in fundamental research based on high-resolution electronic states of molecules on metals, concerning, for example, chemical reactions, and catalysis mechanisms.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available