Detection of polymeric entities through Single-Entity electrochemistry via electrocatalytic amplification

Thu Ha T. Nguyen, Ji Eun Jeong, Jee Woo Kim, Ji Young Lee, Haesik Yang, Han Young Woo, Byung Kwon Kim

Research output: Contribution to journalArticlepeer-review


Single-entity electrochemistry (SEE) was used to investigate the stochastic collisions of polymeric entities. Electrocatalytic amplification of π-conjugated polyelectrolytes (CPEs) using the oxidation of ammonia borane (AB) was employed for detecting polymeric entities. AB oxidation, while slow on a carbon ultramicroelectrode (C-UME), is catalyzed by the active sites of CPEs, which have positive polarons formed along their backbone owing to collisions with the electrode at a sufficiently positive potential (+0.5 V). The collision frequency of the CPE was proportional to the increase in concentration, and the charge distribution of particle collisions tended to be similar to the size distribution obtained by dynamic light scattering (DLS). By applying this method in combination with optical techniques, additional information can be obtained at the molecular level, thereby contributing to the fields of biosensors, and solar/fuel cells.

Original languageEnglish
Article number118102
JournalJournal of Electroanalytical Chemistry
Publication statusPublished - 2024 Mar 15

Bibliographical note

Publisher Copyright:
© 2024 Elsevier B.V.


  • Ammonia borane
  • Electrocatalytic amplification
  • Nano-impact electrochemistry
  • Single-entity electrochemistry
  • Stochastic collision
  • π-conjugated polyelectrolyte

ASJC Scopus subject areas

  • Analytical Chemistry
  • General Chemical Engineering
  • Electrochemistry


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