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Issue 16, 2016

Carbene-mediated self-assembly of diamondoids on metal surfaces

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Abstract

N-heterocyclic carbenes (NHC)s are emerging as an alternative class of molecules to thiol-based self-assembled monolayers (SAMs), making carbene-based SAMs much more stable under harsh environmental conditions. In this work, we have functionalized tiny diamondoids using NHCs in order to prepare highly stable carbene-mediated diamondoid SAMs on metal substrates. Using quantum-mechanical simulations and two different configurations for the carbene-functionalized diamondoids attached on gold, silver, and platinum surfaces we were able to study in detail these materials. Specifically, we focus on the binding characteristics, stability, and adsorption of the NHC-mediated diamondoid SAMs on the metal surfaces. A preferential binding to platinum surfaces was found, while a modulation of the work function in all cases was clear. The surface morphology of all NHC-based diamondoid SAMs was revealed through simulated STM images, which show characteristic features for each surface.

Graphical abstract: Carbene-mediated self-assembly of diamondoids on metal surfaces

Article information


Submitted
07 Dec 2015
Accepted
22 Mar 2016
First published
29 Mar 2016

This article is Open Access

Nanoscale, 2016,8, 8966-8975
Article type
Paper
Author version available

Carbene-mediated self-assembly of diamondoids on metal surfaces

B. Adhikari, S. Meng and M. Fyta, Nanoscale, 2016, 8, 8966 DOI: 10.1039/C5NR08709K

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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