Attachment chemistry of aromatic compounds on a Silicon(100) surface

SURFACE SCIENCE

卷:669

Article

Henriksson, Anders¹  Nishiori, Daiki¹  Maeda, Hiroaki¹  Miyachi, Mariko¹  Yamanoi, Yoshinori¹  Nishihara, Hiroshi¹ 

[1] Univ Tokyo, Sch Sci, Dept Chem, Hongo Bunkyo Ku, Tokyo 1130033, Japan

关键词: Si(100) substrate;    Silicon nanowire;    Palladium;    Ferrocene;    pi-Conjugated complex molecular wire;   

DOI  :  10.1016/j.susc.2017.11.017

来源: Elsevier

【 摘 要 】

A mild method was developed for the chemical attachment of aromatic compounds directly onto a hydrogen terminated Si(100) (H-Si(100)) surface. In the presence of palladium catalyst and base, 4-iodophenylferrocene and a pi-conjugated iron complex were attached to H-Si(100) electrodes and hydrogen-terminated silicon nanowires (H-SiNWs), both of which have predominant dihydride species on their surfaces. The reactions were conducted in 1,4-dioxane at 100 degrees C and the immobilization of both 4-ferrocenylphenyl group and pi-conjugated molecular wires were confirmed and quantified by XPS and electrochemical measurements. We reported densely packed monolayer whose surface coverage (Gamma), estimated from the electrochemical measurements are in analogue to similar monolayers prepared via thermal or light induced hydrosilylation reactions with alkenes or alkynes. The increase in electrochemical response observed on nanostructured silicon surfaces corresponds well to the increase in surface area, those strongly indicating that this method may be applied for the functionalization of electrodes with a variety of surface topographies. (C) 2017 Elsevier B.V. All rights reserved.

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