Functionalization of indium tin oxide electrode with both of dendrimer-encapsulated Pt nanoparticles and chemically converted graphenes for enhanced electrochemiluminescence of luminol/H2O2

Here, we report highly enhanced electrochemiluminescence (ECL) of luminol in the presence of H 2 O 2 on indium tin oxides (ITOs) modified with both of dendrimer-encapsulated Pt nanoparticles (Pt DENs) and chemically converted graphenes (CCGs). The ITO electrodes were electrochemically modified with...

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Bibliographic Details
Published in:Analytical and bioanalytical chemistry 2016-10, Vol.408 (25), p.7165-7172
Main Authors: Yoon, Jisoo, Cho, Taehoon, Lim, Hyojung, Kim, Joohoon
Format: Article
Language:English
Subjects:
Amines
Analytical Chemistry
Analytical Electrochemiluminescence
Biochemistry
Characterization and Evaluation of Materials
Chemical reduction
Chemistry
Chemistry and Materials Science
Dens
Electrochemistry
Electrodes
Electrons
Food Science
Graphene
Hydrogen peroxide
Indium tin oxides
Laboratory Medicine
Monitoring/Environmental Analysis
Nanomaterials
Nanoparticles
Research Paper
Tin
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Summary:Here, we report highly enhanced electrochemiluminescence (ECL) of luminol in the presence of H 2 O 2 on indium tin oxides (ITOs) modified with both of dendrimer-encapsulated Pt nanoparticles (Pt DENs) and chemically converted graphenes (CCGs). The ITO electrodes were electrochemically modified with size-monodisperse Pt DENs via electrooxidative grafting of the terminal amines of the dendrimers encapsulating Pt nanoparticles. The Pt DEN-modified ITOs were then decorated with CCG sheets via electrostatic attachments of graphene oxides (GOs) and subsequent chemical reduction of the GOs to the CCGs. The resulting CCG-Pt DEN/ITO electrodes exhibited highly catalyzed electrochemical oxidation of luminol/H 2 O 2 , leading to significantly enhanced ECL of the luminol/H 2 O 2 system, i.e., ∼15-fold enhancement, compared to ECL emission from bare ITOs even at lower applied potentials, which allowed sensitive ECL-based analysis of H 2 O 2 using the CCG-Pt DEN/ITOs. Graphical abstract We report the highly enhanced electrochemiluminescence of the luminol/H 2 O 2 system on the indium tin oxide electrodes modified with both of Pt nanoparticles and chemically converted graphenes using amine-terminated dendrimers
ISSN:1618-2642
1618-2650
DOI:10.1007/s00216-016-9680-z