Light-induced organic monolayer modification of iodinated carbon electrodes

Callie Fairman, Muthukumar Chockalingam, Guozhen Liu, Alexander H. Soeriyadi, J. Justin Gooding*

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We report the modification of carbon electrodes formed from pyrolyzed photoresist films (PPF) via plasma iodination followed by the organic monolayer modification of these surfaces. The iodinated surfaces were characterized using cyclic voltammetry, atomic force microscopy, and X-ray photoelectron spectroscopy to enable the optimization of the iodination while preserving the stability and smoothness of the carbon surface. Subsequently, the C-I surface was further modified with molecules that possess an alkene or alkyne at one end through light activation with low energy (visible range λ 514 nm). The versatility of the modification reaction of the C-I surfaces is shown by reactions with undecylenic acid, 1,8-nonadiyne, and S-undec-10-enyl-2,2,2- trifluoroethanethioate (C11-S-TFA). Modification with 1,8-nonadiyne allows further modification via "click" chemistry with azido-terminated oligo(ethylene oxide) molecules demonstrated briefly to alter the hydrophilicity of the surface after attachment of ethylene oxide moieties. Furthermore, patterning of C11-S-TFA was demonstrated using a simple photolithography technique. Deprotection of the C11-S-TFA gave a free thiol allowed patterning of gold nanoparticles on the surface as verified using scanning electron microscopy (SEM). These results demonstrate that plasma iodination to form C-I is a versatile, simple, and modular approach to functionalize the carbon surface.

Original languageEnglish
Pages (from-to)332-339
Number of pages8
JournalLangmuir
Volume30
Issue number1
DOIs
Publication statusPublished - 14 Jan 2014
Externally publishedYes

Fingerprint Dive into the research topics of 'Light-induced organic monolayer modification of iodinated carbon electrodes'. Together they form a unique fingerprint.

Cite this