Carbon Nanotube Immobilized Electrode Using Amphiphilic Phospholipid Polymer with Anti-fouling and Dispersion Property for Electrochemical Analysis

Katsuhiko Sato, Tomohiro Konno

Research output: Contribution to journalArticlepeer-review

Abstract

A carbon nanotube (CNT)-modified electrode was fabricated by dropping a dispersion of multi-walled CNTs in water-soluble and amphiphilic phospholipid polymer with both dispersing ability and anti-biofouling property onto a Au electrode. A poly(2-methacryloyloxyethyl phosphorylcholine-co-n-butyl methacrylate) (PMB) composed from 50 mol% of 2-methacryloxylethyl phosphorylcholine and 50 mol% of n-butyl methacrylate (PMB50) was used as dispersing reagent for CNTs. The dispersion of water-insoluble material by PMB50 and its antifouling effects in electrochemical analysis were investigated. The CNT-modified electrode showed an anodic peak potential that was shifted negatively and an increase in the current value for the electrolytic oxidation of nicotinamide adenine dinucleotide. In addition, the charge on PMB50 did not inhibit the electrochemical reaction of the redox compounds K3[Fe(CN)6], [Ru(NH3)6]Cl3, and hydroxymethylferrocene. Cyclic voltammetry of K3[Fe(CN)6] in 4 % bovine serum albumin (BSA) using a bare Au electrode, the anodic peak current was reduced to 47 % of that without BSA. In contrast, the antifouling effect of the PMB50-coated electrode meant that the current was only reduced to 70 % of that without BSA.

Original languageEnglish
Pages (from-to)898-901
Number of pages4
JournalElectroanalysis
Volume32
Issue number5
DOIs
Publication statusPublished - 2020 May 1

Keywords

  • CNT modified electrodes
  • Dispersion effect
  • Protein adsorption
  • amphiphilic phospholipid polymer

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

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