TY - JOUR
KW - Multidisciplinary
AU - Eric Muller
AU - Thomas Gray
AU - Zhou Zhou
AU - Xinbin Cheng
AU - Omar Khatib
AU - Hans Bechtel
AU - Markus Raschke
AB - Molecular coupling defines fundamental properties of materials, yet spectroscopic access and imaging have remained challenging due to the short length scales of order and disorder and the low energy scales of interactions. We employ vibrational excitons as local structural probes in nanoscale infrared imaging and spectroscopy to map molecular order in a model organic electronic material (octaethyl porphyrin ruthenium(II) carbonyl). We observe coexistence of both amorphous and crystalline phases. Even for highly crystalline porphyrin, the size of individual ordered regions can remain limited to a few molecular lengths. This approach of vibrational exciton nanospectroscopy is broadly applicable to many interacting molecular systems and can provide insight into structure and energy transfer in organic electronics, proteins, or other biological complexes.
BT - Proceedings of the National Academy of Sciences
DA - 2020-03
DO - 10.1073/pnas.1914172117
IS - 13
N2 - Molecular coupling defines fundamental properties of materials, yet spectroscopic access and imaging have remained challenging due to the short length scales of order and disorder and the low energy scales of interactions. We employ vibrational excitons as local structural probes in nanoscale infrared imaging and spectroscopy to map molecular order in a model organic electronic material (octaethyl porphyrin ruthenium(II) carbonyl). We observe coexistence of both amorphous and crystalline phases. Even for highly crystalline porphyrin, the size of individual ordered regions can remain limited to a few molecular lengths. This approach of vibrational exciton nanospectroscopy is broadly applicable to many interacting molecular systems and can provide insight into structure and energy transfer in organic electronics, proteins, or other biological complexes.
PB - Proceedings of the National Academy of Sciences
PY - 2020
SP - 7030
EP - 7037
T2 - Proceedings of the National Academy of Sciences
TI - Vibrational exciton nanoimaging of phases and domains in porphyrin nanocrystals
VL - 117
SN - 0027-8424, 1091-6490
ER -