A molecule with dual functionality 4-aminophenylmethylphosphonic acid: A comparison between layers formed on indium tin oxide by in situ generation of an aryl diazonium salt or by self-assembly of the phosphonic acid

Xin Chen, Muthukumar Chockalingam, Guozhen Liu, Erwann Luais, Alicia L. Gui, J. Justin Gooding*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

4-Aminophenylmethylphosphonic acid was grafted on ITO surfaces by 1) electrochemical reductive adsorption of the corresponding aryl diazonium salt and 2) by self-assembly via the phosphonic acid moiety. The aryl diazonium salt derived surfaces are reasonably stable within a wide potential range from -600mV to 600mV compared to a very narrow stable range between -40mV and 40mV for the self-assembled layers. The different surface stabilities were assessed with a view to forming ITO-organic layer-gold nanoparticle (AuNPs) constructs. As expected the ITO-organic layer-AuNPs construct formed by electrochemical adsorption (ITO-Ph-AuNP) was significantly more stable than the construct formed by self-assembly of phosphonates (ITO-PO3Ph-AuNPs).

Original languageEnglish
Pages (from-to)2633-2642
Number of pages10
JournalElectroanalysis
Volume23
Issue number11
DOIs
Publication statusPublished - Nov 2011
Externally publishedYes

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