AVS 61st International Symposium & Exhibition
    Nanometer-scale Science and Technology Wednesday Sessions
       Session NS-WeM

Invited Paper NS-WeM12
NSTD Recognition Award Lecture: Probing Local Optoelectronic Properties of Porphyrin-Gold Molecular Interfaces with STM/STS

Wednesday, November 12, 2014, 11:40 am, Room 304

Session: Nanoscale Catalysis and Surface Chemistry  
Presenter: Dawn Bonnell, University of Pennsylvania
Authors: X. Chen, University of Pennsylvania
E.H. Morales, University of Pennsylvania
T.-H. Park, University of Pennsylvania
M.J. Therien, Duke University
D.A. Bonnell, University of Pennsylvania
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Porphyrin molecules are a group of organic compounds that exist extensively in natural biological systems, and they manifest rich electronic and photonic properties, raising the possibility of optoelectronic device applications. In this research thiolated Zinc-porphyrin oligomer molecules were linked to Au(111) surface in a vertical device configuration, embedded within an alkanethiol self-assembled monolayer. Spectroscopic measurements were done to determine the electronic orbital structures of different Zinc-porphryin oligomer single molecules via scanning tunneling microscope. With lasers of different wavelength coupled to the tunneling junction, both ground state and excited state electronic orbital structures of Zinc-porphyrin single molecule were measured.