Molecular Heterojunctions of Oligo(phenylene ethynylene)s with Linear to Cruciform Framework
文献类型：期刊论文
| 作者 | Wei, Zhongming1,2,3; Hansen, Tim1,2; Santella, Marco1,2; Wang, Xintai1,2; Parker, Christian R.1,2; Jiang, Xingbin4; Li, Tao1,2; Glyvradal, Magni1,2; Jennum, Karsten1,2; Glibstrup, Emil1,2 |
| 刊名 | ADVANCED FUNCTIONAL MATERIALS
 |
| 出版日期 | 2015-03-18 |
| 卷号 | 25期号:11页码:1700-1708 |
| 英文摘要 | Electrical transport properties of molecular junctions are fundamentally affected by the energy alignment between molecular frontier orbitals (highest occupied molecular orbital (HOMO) or lowest unoccupied molecular orbital (LUMO)) and Fermi level (or work function) of electrode metals. Dithiafulvene (DTF) is used as substituent group to the oligo(phenylene ethynylene) (OPE) molecular wires and different molecular structures based on OPE3 backbone (with linear to cruciform framework) are achieved, with viable molecular orbitals and HOMO-LUMO energy gaps. OPE3, OPE3-DTF, and OPE3-tetrathiafulvalene (TTF) can form good self-assembled monolayers (SAMs) on Au substrates. Molecular heterojunctions based on these SAMs are investigated using conducting probe-atomic force microscopy with different tips (Ag, Au, and Pt) and Fermi levels. The calibrated conductance values follow the sequence OPE3-TTF > OPE3-DTF > OPE3 irrespective of the tip metal. Rectifi cation properties (or diode behavior) are observed in case of the Ag tip for which the work function is furthest from the HOMO levels of the OPE3s. Quantum chemical calculations of the transmission qualitatively agree with the experimental data and reproduce the substituent effect of DTF. Zero-bias conductance, and symmetric or asymmetric couplings to the electrodes are investigated. The results indicate that improved fidelity of molecular transport measurements may be achieved by systematic studies of homologues series of molecular wires applying several different metal electrodes. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/28440]  |
| 专题 | 化学研究所_有机固体实验室 |
| 作者单位 | 1.Univ Copenhagen, Nanosci Ctr, DK-2100 Copenhagen O, Denmark 2.Univ Copenhagen, Dept Chem, DK-2100 Copenhagen O, Denmark 3.Chinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China 4.Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China 5.Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei, Zhongming,Hansen, Tim,Santella, Marco,et al. Molecular Heterojunctions of Oligo(phenylene ethynylene)s with Linear to Cruciform Framework[J]. ADVANCED FUNCTIONAL MATERIALS,2015,25(11):1700-1708. |
| APA | Wei, Zhongming.,Hansen, Tim.,Santella, Marco.,Wang, Xintai.,Parker, Christian R..,...&Laursen, Bo W..(2015).Molecular Heterojunctions of Oligo(phenylene ethynylene)s with Linear to Cruciform Framework.ADVANCED FUNCTIONAL MATERIALS,25(11),1700-1708. |
| MLA | Wei, Zhongming,et al."Molecular Heterojunctions of Oligo(phenylene ethynylene)s with Linear to Cruciform Framework".ADVANCED FUNCTIONAL MATERIALS 25.11(2015):1700-1708. |
入库方式： OAI收割
来源：化学研究所
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