Probing Local Donor-Acceptor Charge Transfer in a Metal-Organic Framework Via a Scanning Tunneling Microscope

Ting Hsun Yang, Shao Heng Yang, Yu Chuan Chen, Darwin Kurniawan, Wei Hung Chiang, Ya Ping Chiu, Chung Wei Kung

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)21635-21640
Number of pages6
JournalJournal of Physical Chemistry C
Volume124
Issue number39
DOIs
Publication statusPublished - 2020 Oct 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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