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., Kung C.-W.Yang T.-H.Yang, S.-H.S.-H.YangChen, Y.-C.Y.-C.ChenKurniawan, D.D.KurniawanChiang, W.-H.W.-H.ChiangChiu, Y.-P.Y.-P.ChiuYA-PING CHIUYang, T.-H.T.-H.YangKung, C.-W.C.-W.Kung2021-07-282021-07-28202019327447https://www.scopus.com/inward/record.uri?eid=2-s2.0-85095118777&doi=10.1021%2facs.jpcc.0c07477&partnerID=40&md5=10266403ae4580f3b653f0f4d3f04e14https://scholars.lib.ntu.edu.tw/handle/123456789/575015In 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.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 FrameworksCharge 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 Frameworksjournal article10.1021/acs.jpcc.0c074772-s2.0-85095118777WOS:000577151900041