Collective radical oligomerisation induced by an STM tip on a silicon surface.

Date publication

janvier 2021

Journal

Nanoscale

Auteurs

Membres identifiés du Cancéropôle Est :
Dr CHERIOUX Frédéric

Tous les auteurs :
Geagea E, Jeannoutot J, Féron M, Palmino F, Thomas CM, Rochefort A, Chérioux F

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/33346311

Résumé

Over the past decade, on-surface fabrication of organic nanostructures has been widely investigated for the development of molecular electronic components, catalysts, and new materials. Here, we introduce a new strategy to obtain alkyl oligomers in a controlled manner using on-surface radical oligomerisations that are triggered by electrons between the tip of a scanning tunnelling microscope and the Si(111)√3 ×√3 R30°-B surface. This electron transfer event only occurs when the bias voltage is below -4.5 V and allows access to reactive radical species under exceptionally mild conditions. This transfer can effectively 'switch on' a sequence leading to the formation of oligomers of defined size distribution thanks to the on-surface confinement of the reactive species. Our approach enables new ways to initiate and control radical oligomerisations with tunnelling electrons, leading to molecularly precise nanofabrication.

Référence

Nanoscale. 2021 Jan 7;13(1):349-354