Single-electron transport in H2O@C60 single-molecule transistors
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-03-28 |
| Journal | Chinese Physics B |
| Authors | Bowen Liu, Jun Chen, Yiping Ouyang, Minhao Zhang, YuanāZhi Tan |
| Institutions | Nanjing University, Xiamen University |
| Citations | 5 |
Abstract
Section titled āAbstractāSingle-molecule transistors (SMTs) based on fullerenes and their derivatives have been recognized as a long-sought platform for studying the single-electron transport properties. H 2 O@C 60 is a combination of fullerene and H 2 O, a typical light molecule. Here we use the āmolecular surgeryā technique to synthesize the H 2 O@C 60 molecule and then construct the H 2 O@C 60 SMTs, together with the C 60 SMTs. Evidences for single-electron transport have been obtained in our measurements, including explicit Coulomb blockade and Coulomb oscillations. We then calculate the detailed parameters of the H 2 O@C 60 and C 60 SMTs using a capacitance model derived from the Coulomb diamond feature, which gives a capacitance ratio of 1:5.05:8.52 for the H 2 O@C 60 SMT and 1:29.5:74.8 for the C 60 SMT. Moreover, the gate efficiency factor Ī± turns out to be 0.0686 in the H 2 O@C 60 SMT, about ten times larger than that in the C 60 SMT. We propose that the enhanced gate efficiency in H 2 O@C 60 SMT may be induced by the closer attachment of molecular orbital electron clouds to the gate substrate due to polarization effects of H 2 O.