Observing Phase Transition of a Temperature-Responsive Polymer Using Electrochemical Collisions on an Ultramicroelectrode

Nhung T.T. Hoang, Jinhee Lee, Byungyong Lee, Hae Young Kim, Jungeun Lee, Truc Ly Nguyen, Myungeun Seo, Sang Youl Kim, Byung Kwon Kim

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Herein, a study on a new lower critical solution temperature (LCST) polymer in an organic solvent by an electrochemical technique has been reported. The phase-transition behavior of poly(arylene ether sulfone) (PAES) was examined on 1,2-dimethoxyethane (DME). At a temperature above the LCST point, polymer molecules aggregated to create polymer droplets. These droplets subsequently collided with an ultramicroelectrode (UME), resulting in a new form of staircase current decrease. The experimental collision frequency and collision signal were analyzed in relation to the concentration of the polymer. In addition, the degree of polymer aggregation associated with temperature change was also observed.

Original languageEnglish
Pages (from-to)7261-7266
Number of pages6
JournalAnalytical Chemistry
Volume90
Issue number12
DOIs
StatePublished - 19 Jun 2018

Bibliographical note

Funding Information:
This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, and ICT (NRF-2015R1C1A1A01055250 and NRF-2018R1C1B6008668).

Publisher Copyright:
© 2018 American Chemical Society.

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