Self-decoupled tetrapodal perylene molecules for luminescence studies of isolated emitters on Au(111)
Résumé
Self-decoupled tetrapodal perylene molecules were designed, synthesized, and deposited on the Au(111) surface through the electrospray
ionization technique. Photoluminescence and lifetime measurements show that the chromophore groups of the designed molecules are well
decoupled from the gold substrate. Preliminary scanning tunneling microscopy induced luminescence measurements indicate the
observation of molecule-specific emissions from isolated single tetrapodal perylene molecules adsorbed directly on Au(111). The emergence
of significant emission when the tip is positioned at the molecular center suggests that there is a considerable vertical component of the transition
dipole of the designed molecule along the tip axial direction. Our results may open up a route for the realization of nanolight sources
and plasmonic devices based on organic molecules.
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