Probing Local Donor-Acceptor Charge Transfer in a Metal-Organic Framework Via a Scanning Tunneling Microscope
Journal
Journal of Physical Chemistry C
Journal Volume
124
Journal Issue
39
Pages
21635-21640
Date Issued
2020
Author(s)
Yang T.-H., Yang S.-H., Chen Y.-C., Kurniawan D., Chiang W.-H., Chiu Y.-P., Kung C.-W.
Yang, S.-H.
Chen, Y.-C.
Kurniawan, D.
Chiang, W.-H.
Chiu, Y.-P.
Yang, T.-H.
Kung, C.-W.
Abstract
In an effort to gain more information beyond bulk conductivity of electrically conductive metal-organic frameworks (MOFs), herein, for the first time, we utilize a scanning tunneling microscope (STM) to probe local tunneling conductance in the atomic scale on the surface of conductive MOF-based crystals. By utilizing a porphyrinic zirconium-based MOF installed with electron-donating graphene quantum dots (GQDs) that was published in our recent study as a demonstration, significantly distinct electronic properties can be observed between the locations with and without the GQD-porphyrin donor-acceptor pairs. Such an STM technique is thus considered as a powerful tool to probe the spatial uniformity in electrical conductance and investigate the origins of conductivity for a range of conductive MOF-based materials. ? 2020 American Chemical Society.
Subjects
Charge transfer; Electronic properties; Graphene; Graphene quantum dots; Microscopes; Organic polymers; Organometallics; Scanning tunneling microscopy; Semiconductor quantum dots; Bulk conductivities; Donor-acceptor pairs; Electrical conductance; Electrically conductive; Electron-donating; Metalorganic frameworks (MOFs); Spatial uniformity; Tunneling conductance; Metal-Organic Frameworks
Other Subjects
Charge transfer; Electronic properties; Graphene; Graphene quantum dots; Microscopes; Organic polymers; Organometallics; Scanning tunneling microscopy; Semiconductor quantum dots; Bulk conductivities; Donor-acceptor pairs; Electrical conductance; Electrically conductive; Electron-donating; Metalorganic frameworks (MOFs); Spatial uniformity; Tunneling conductance; Metal-Organic Frameworks
Type
journal article