Electrochemical Generation of Hot Electrons in Fully Aqueous Solutions at Tetrahedral Amorphous Carbon Thin Film Electrodes and Electrochemiluminescence Immunoassay of Serum Amyloid A

Kalle Salminen, Jian Hui Fang*, Jarkko Etula, Niklas Wester, Jarkko Eskola, Sakari Kulmala, Jian Jun Sun*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Electrochemistry of hot electrons in fully aqueous solutions at tetrahedral amorphous carbon thin film electrodes is discussed. The generation of these highly reducing chemical species was confirmed by normal pulse voltammetry and several electrochemiluminescent systems. Electron transfer into pre-existing solvent cavities was observed at approximately −2.65 V vs. Ag/AgCl (sat.). Electrogenerated hot electrons were utilized as chemiluminescent mediators in heterogeneous sandwich immunoassay of Serum Amyloid A. The calibration curve was linear over four orders of magnitude and the detection limit was 85 ng L−1 that demonstrates the efficiency of hot electron generation at this electrode material.

Original languageEnglish
JournalELECTROANALYSIS
DOIs
Publication statusE-pub ahead of print - 10 Aug 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • Bioaffinity assays
  • Electrochemiluminescence
  • Hydrated electrons
  • Quasi-free electrons

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