Amit Einav, Berg Iris, Zhang Wenhao, Mondal Rajarshi, Shema Hadar, Gutkin Vitaly, Kravchuk Tatyana, Toste F Dean, Nairoukh Zackaria, Gross Elad
Institute of Chemistry, The Hebrew University, Jerusalem, 9190401, Israel.
The Center for Nanoscience and Nanotechnology, The Hebrew University, Jerusalem, 9190401, Israel.
Small. 2024 Jan;20(2):e2302317. doi: 10.1002/smll.202302317. Epub 2023 Sep 4.
The incorporation of organic self-assembled monolayers (SAMs) in microelectronic devices requires precise spatial control over the self-assembly process. In this work, selective deposition of N-heterocyclic carbenes (NHCs) on specific electrodes within a two-microelectrode array is achieved by using pulsed electrodeposition. Spectroscopic analysis of the NHC-coated electrode arrays reveals that each electrode is selectively coated with a designated NHC. The impact of NHC monolayers on the electrodes' work function is quantified using Kelvin probe force microscopy. These measurements demonstrate that the work function values of each electrode can be independently tuned by the adsorption of a specific NHC. The presented deposition method enables to selectively coat designated microelectrodes in an electrode array with chosen NHC monolayers for tuning their chemical and electronic functionality.
将有机自组装单分子层（SAMs）整合到微电子器件中需要对自组装过程进行精确的空间控制。在这项工作中，通过使用脉冲电沉积实现了在双微电极阵列中的特定电极上选择性沉积氮杂环卡宾（NHCs）。对涂覆有NHC的电极阵列进行光谱分析表明，每个电极都被选择性地涂覆了指定的NHC。使用开尔文探针力显微镜对NHC单分子层对电极功函数的影响进行了量化。这些测量结果表明，每个电极的功函数值可以通过特定NHC的吸附而独立调节。所提出的沉积方法能够用选定的NHC单分子层选择性地涂覆电极阵列中的指定微电极，以调节其化学和电子功能。
