Tuning the thermoelectrical properties of anthracene-based self-assembled monolayers.
Tuning the thermoelectrical properties of anthracene-based self-assembled monolayers.
复制标题
DOI：
10.1039/d0sc02193h
复制
发表时间：
2020-07-14
期刊：
影响因子：
8.4
通讯作者：
Lambert CJ
中科院分区：
文献类型：
--
作者：
Ismael A;Wang X;Bennett TLR;Wilkinson LA;Robinson BJ;Long NJ;Cohen LF;Lambert CJ
已知单分子的电导率可以通过化学改变其对外部电极的锚基团而以确定性方式控制。已知单分子的电导率可以通过化学改变其对外部电极的锚基团而以确定性方式控制。在这里，通过采用合成的方法来改变周围的芳香族蒽核心的终端锚基团，并通过形成自组装单分子层（SAM）的所得分子，我们证明，这种方法的控制可以转化为交叉平面SAM上的黄金分子膜。跨平面电导的自组装膜形成的蒽为基础的分子与四种不同的组合的锚被测量到不同的一个因素，约3与理论预测一致。我们还表明，这种薄膜的塞贝克系数可以提高超过一个数量级的适当选择的锚组，可以实现积极和消极的塞贝克系数。这表明自组装膜的热电性能是由它们的锚基团控制的，这代表了未来分子尺度电子学的功能性超薄膜器件的关键一步。
It is known that the electrical conductance of single molecules can be controlled in a deterministic manner by chemically varying their anchor groups to external electrodes. It is known that the electrical conductance of single molecules can be controlled in a deterministic manner by chemically varying their anchor groups to external electrodes. Here, by employing synthetic methodologies to vary the terminal anchor groups around aromatic anthracene cores, and by forming self-assembled monolayers (SAMs) of the resulting molecules, we demonstrate that this method of control can be translated into cross-plane SAM-on-gold molecular films. The cross-plane conductance of SAMs formed from anthracene-based molecules with four different combinations of anchors are measured to differ by a factor of approximately 3 in agreement with theoretical predictions. We also demonstrate that the Seebeck coefficient of such films can be boosted by more than an order of magnitude by an appropriate choice of anchor groups and that both positive and negative Seebeck coefficients can be realised. This demonstration that the thermoelectric properties of SAMs are controlled by their anchor groups represents a critical step towards functional ultra-thin-film devices for future molecular-scale electronics.
登录
查看更多内容
影响因子：
3.3
作者：
Gomar-Nadal, E;Ramachandran, GK;Lindsay, SM
通讯作者：
Lindsay, SM
影响因子：
16.6
作者：
Ismael, Ali Khalid;Wang, Kun;Higgins, Simon J.
通讯作者：
Higgins, Simon J.
影响因子：
6.7
作者：
Herrer, L.;Ismael, A.;Cea, P.
通讯作者：
Cea, P.
利用破坏性γ干扰全面抑制单分子电导
影响因子：
64.8
作者：
Garner, Marc H.;Li, Haixing;Solomon, Gemma C.
通讯作者：
Solomon, Gemma C.
影响因子：
21.8
作者：
Dell, Emma J.;Capozzi, Brian;Campos, Luis M.
通讯作者：
Campos, Luis M.