Light addressable potentiometric sensor with fluorine-terminated hafnium oxide layer for sodium detection

Cheng En Lue*, Chao Sung Lai, Hsin Yu Chen, Chia Ming Yang

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

7 Scopus citations

Abstract

In this study, post-CF4 plasma surface treatment of light addressable potentiometric sensor (LAPS) with a HfO2-sensing membrane was carried out. pH sensitivity decreased but pNa sensitivity increased with fluorine incorporation. The highest pNa sensitivity was 31.8 mV/pNa, which was optimized with 3 min post CF4 plasma treatment. The results showed a high possibility for sensing sodium ions using an inorganic-sensing membrane and a fabrication process. Moreover, on the basis of the analysis of atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) spectra, a sensing mechanism was developed.

Original languageEnglish
Article number04DL05
JournalJapanese Journal of Applied Physics
Volume49
Issue number4 PART 2
DOIs
StatePublished - 04 2010

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