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Light‐Addressable Potentiometric Sensor with Nitrogen‐Incorporated Ceramic Sm 2 O 3 Membrane for Chloride Ions Detection
Author(s) -
Wang JerChyi,
Ye YuRen,
Lin YuHsuan
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13279
Subject(s) - potentiometric titration , chloride , chemistry , membrane , ion , potentiometric sensor , inorganic chemistry , x ray photoelectron spectroscopy , potassium , ceramic membrane , nitrogen , analytical chemistry (journal) , samarium , nuclear chemistry , chemical engineering , chromatography , biochemistry , organic chemistry , engineering
A light‐addressable potentiometric sensor (LAPS) with ceramic samarium oxide ( Sm 2 O 3 )‐sensing membrane treated by nitrogen plasma immersion ion implantation (PIII) has been proposed for chloride ion detection. For the pure Sm 2 O 3 ‐LAPS, a potassium ion sensitivity of 39.21 mV/pK is obtained. With the nitrogen PIII treatment on Sm 2 O 3 ‐sensing membrane, the N–O peak is observed by X‐ray photoelectron spectroscopy, implying the formation of positive charges, (N‐O) + and (N‐O‐N) + , within the Sm 2 O 3 film. The positive charges can attract the chloride ions to react with the surface sites of OH 2 + , achieving a superior chloride ion sensitivity of 36.17 mV/pCl for the Sm 2 O 3 ‐LAPS with nitrogen PIII treatment. The LAPS structure with ceramic Sm 2 O 3 ‐sensing membrane can be used for future biosensing applications, especially for the potassium and chloride ions detection in serum.