Selective Deposition of N-Heterocyclic Carbene Monolayers on Designated Au Microelectrodes within an Electrode Array

Einav Amit, Iris Berg, Wenhao Zhang, Rajarshi Mondal, Hadar Shema, Vitaly Gutkin, Tatyana Kravchuk, F. Dean Toste, Zackaria Nairoukh, Elad Gross*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageAmerican English
Article number2302317
JournalSmall
Volume20
Issue number2
DOIs
StatePublished - 11 Jan 2024

Bibliographical note

Publisher Copyright:
© 2023 The Authors. Small published by Wiley-VCH GmbH.

Keywords

  • N-heterocyclic carbenes
  • monolayers
  • surface analysis
  • surface chemistry

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