Electrogenerated chemiluminescence sensor based on a self-assembled monolayer of Ruthenium(II)-bis(2,2'-bipyridyl)(aminopropyl imidazole) on gold deposited screen printed electrode

Chang Hoon Kang, Young Bong Choi, Hyug Han Kim, Han Nim Choi, Won Yong Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A new electrogenerated chemiluminescence (ECL) sensor based on a self-assembled monolayer (SAM) of Ru(II)-bis(2,2'-bipyridyl)(aminopropyl imidazole) on a gold-deposited screen printed electrode (SPE) has been developed. Since the ECL emission of the Ru(II)-bis(2,2'-bipyridyl)(aminopropyl imidazole) complex can be easily obtained at an applied potential of less than +0.8V, the possibility of the oxidation of the Ru-complex SAM formed on gold-deposited SPE electrode surface was greatly diminished and thus the stability of the resulting Ru-complex SAM-based ECL sensor was enormously enhanced compared to the previously reported Ru(bpy)32+-derivative monolayer-based ECL sensors with applied potentials of more than +1.0V. In the present study, the gold deposited SPE with carbon nanotube paste was used in order to increase the amount of Ru-complex immobilized on the electrode surface through a large surface area of deposited gold nanoparticles causing good charge transport and thus leading to the increased sensitivity of the ECL sensor. The ECL characteristics obtained with the present Ru-complex SAM-based ECL sensor are compared with those obtained with other Ru(bpy)32+-SAM-based ECL sensors.

Original languageEnglish
Pages (from-to)2131-2138
Number of pages8
JournalElectroanalysis
Volume23
Issue number9
DOIs
Publication statusPublished - 2011 Sep 1

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Electrochemistry

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