期刊論文
| 學年 | 108 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2019-08-14 |
| 作品名稱 | Effect of the Chemical Potentials of Electrodes on Charge Transport across Molecular Junctions |
| 作品名稱（其他語言） | |
| 著者 | Geng-Min Lin; Chih-Hsun Lin; Hao Howard Peng; Han Hsiao; Tsai-Hui Wang; Ching-Hwa Ho; Hsiu-Fu Hsu; Chun-hsien Chen |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | The Journal of Physical Chemistry C 123(36), p.22009-22017 |
| 摘要 | Charge transport across molecular junctions can be described by G = Gcontactexp(−βL), envisioned as sequential propagation through electrode-molecule contacts (Gcontact) and the molecular backbone (exp(−βL)). How Gcontact and exp(−βL) are modulated by the chemical potentials of the electrodes (EF), although essential, remains relatively unexplored because EF is typically driven by the applied Vbias and hence limited to a small range in that a large Vbias introduces complicated transport pathways. Herein, the interrelated EF and Vbias are electrochemically disentangled by fixing Vbias at a small value while potentiostatically positioning the electrode EF in a 1.5 V range. The results show that EF affects Gcontact more pronouncedly than the molecular backbone. For the covalently anchored acetylene-electrode (CC−Au) junctions, the energy level of the frontier molecular orbital (EFMO) is found to shift nonlinearly as EF changes; |EFMO – EF| is independent of EF in the range of −0.25 to 0.00 V (vs EAg/AgCl) and is narrowed by ∼32% at 0.00–0.75 V. These findings are elucidated by the refined Simmons model, Newns-Anderson model, and single-level Breit–Wigner formula and quantitatively shed light on the influence of electrodes on the molecular orbitals (viz., the self-energy, Σ). |
| 關鍵字 | |
| 語言 | en_US |
| ISSN | |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/118897 ) |