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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >One Carbon Matters: The Origin and Reversal of Odd-Even Effects in Molecular Diodes with Self-Assembled Monolayers of Ferrocenyl-Alkanethiolates
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One Carbon Matters: The Origin and Reversal of Odd-Even Effects in Molecular Diodes with Self-Assembled Monolayers of Ferrocenyl-Alkanethiolates

机译：一个碳物质：具有二茂铁基-链烷硫醇盐自组装单分子分子二极管的奇偶效应的起源和逆转

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We investigated the origin Of odd-even effects in molecular diodes: based oh self-assembled mOnolayers,-(SAMs) of ferrocenyl--terminated n-alkanethiolates S(CH2) Fc -7-4.1 44i! with n = 6-15 on Ag-or Au surfates contacted with EGalii top electrodes: These S.iVVIs have different MS-C bond angles of 1800 when M = Ag and 104 degrees when M = Au,causing,-a multitude,of odd-even effects in the performance of the,diode&-, By changing th.e M-S-C bond angles and using several characterization techniques, we were able to,syStern-atically identify and rationalize odc11-even effects in the leCtronic structure of the device. Changing n from 6 to 15 resulted- in an odd-even effect in the tilt angle of the Pc units (a), which, in turn, caused odd-even effects in the surfaCe dipole, ',work function, and HOMO onset -,(HOMO = highest occupied molecular orbital). 'These odd-even effects -Caused an -odd-even modulation of the funneling Current across the -diode in the on state (the current that flows across,the junctions when the idicide allows the current to pass through) -The current that flows across the diodes in their off state,(the leakage current) -also followed an odd-even effect that was related- to an odd-even effect hi the packing energy: =SAMs with small tilt angles of the ferrocenyl units ez (with the Pc units standing up) pack better than SAMs with large a values (with the Fc Units in a parallel orientation with the plane of the electrode). All these odd-even effects were completely and consistently re-Versed when the Ag electrodes were replaced with Au electrodes proving they are induced by the M-S-C bond angle.
机译：我们研究了分子二极管中奇偶效应的起源：基于自组装的单分子层，二茂铁基封端的正链烷硫醇盐S（CH2）Fc -7-4.1 44i！在与EGalii顶部电极接触的Ag-或Au上的n = 6-15时：这些S.iVVI具有不同的MS-C键角，当M = Ag时为1800，当M = Au时为104度，导致-通过改变MSC键的角度并使用几种表征技术，二极管的性能具有奇偶效应，因此，我们能够系统地识别并合理化器件电子结构中的odc11偶效应。将n从6更改为15会导致Pc单位（a）的倾斜角产生奇偶效应，进而引起表面偶极子，功函数和HOMO发作的奇偶效应- ，（HOMO =最高占据分子轨道）。 '这些奇偶效应-导致处于导通状态的-二极管两端的漏斗电流（-流过电流，当除杂剂允许电流通过时的结点）产生-双-偶数调制-流过的电流在二极管处于关断状态时，（泄漏电流）也遵循一个奇偶效应，与包装能量的奇偶效应有关：=二茂铁基单元ez的小倾斜角的SAM立式PC单元比具有较大数值的SAM更好（FC单元与电极平面平行定向）。当用Au电极代替Ag电极时，所有这些奇偶效应都得到了完全一致的验证，证明了它们是由M-S-C键角引起的。

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