Vibrational exciton nanoimaging of phases and domains in porphyrin nanocrystals.

ABSTRACT: Much of the electronic transport, photophysical, or biological functions of molecular materials emerge from intermolecular interactions and associated nanoscale structure and morphology. However, competing phases, defects, and disorder give rise to confinement and many-body localization of the associated wavefunction, disturbing the performance of the material. Here, we employ vibrational excitons as a sensitive local probe of intermolecular coupling in hyperspectral infrared scattering scanning near-field optical microscopy (IR s-SNOM) with complementary small-angle X-ray scattering to map multiscale structure from molecular coupling to long-range order. In the model organic electronic material octaethyl porphyrin ruthenium(II) carbonyl (RuOEP), we observe the evolution of competing order

SUBMITTER: Muller EA 

PROVIDER: S-EPMC7132254 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature