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All‐solid‐state Fluoride Ion‐selective Electrode using LaF 3 Single Crystal with Poly(3,4‐ethylenedioxythiophene) as Solid Contact Layer
Author(s) -
Yamada Tetsuya,
Kanda Kaito,
Yanagida Yasuko,
Mayanagi Gen,
Washio Jumpei,
Takahashi Nobuhiro
Publication year - 2023
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202200103
Subject(s) - poly(3,4 ethylenedioxythiophene) , fluoride , solid state , materials science , electrode , ion , layer (electronics) , optoelectronics , ion selective electrode , analytical chemistry (journal) , inorganic chemistry , nanotechnology , chemistry , pedot:pss , chromatography , organic chemistry , selectivity , catalysis
An all‐solid‐state fluoride ion‐selective electrode (ISE) was prepared using LaF 3 single crystal with poly(3,4‐ethylenedioxythiophene (PEDOT) as the solid contact layer. In contrast to polymer‐based ISEs, crystalline membrane‐based ISEs have not been used for all‐solid‐state device, thereby prohibiting the integration of ISEs on a chip. The all‐solid‐state fluoride ISE developed in this study exhibited superior sensitivity (−56.0±0.9 mV/dec) and selectivity compared to those of conventional inner filling solution ISE. The effects of PEDOT as a solid contact layer were analyzed using chronopotentiometry and electrochemical impedance spectroscopy, which revealed that PEDOT promoted electrode stability. The all‐solid‐state device can miniaturize the fluoride ISE and facilitate environmental, industrial, agricultural, and physiological monitoring.