Comparison of NH3 and N2O Plasma Treatments on Bi2O3 Sensing Membranes Applied in an Electrolyte–Insulator–Semiconductor Structure

In this study, bismuth trioxide (Bi2O3) membranes in an electrolyte–insulator–semiconductor (EIS) structure were fabricated with pH sensing capability. To optimize the sensing performance, the membranes were treated with two types of plasma—NH3 and N2O. To investigate the material property improveme...

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Bibliographic Details
Published in:Membranes (Basel) 2022-02, Vol.12 (2), p.188
Main Authors: Kao, Chyuan-Haur, Chen, Kuan-Lin, Chiu, Yi-Shiang, Hao, Lin Sang, Chen, Shih-Ming, Li, Ming-Hsien, Lee, Ming-Ling, Chen, Hsiang
Format: Article
Language:English
Subjects:
Ammonia
Biomedical materials
Bismuth oxides
Bismuth trioxide
Crystallization
Electrolytes
grainization
Material properties
Membranes
NH3 and N2O
Nitrogen
nitrogen passivation
Nitrous oxide
pH effects
Plasma
plasma treatment
Sensors
Silica
Silicon wafers
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Summary:In this study, bismuth trioxide (Bi2O3) membranes in an electrolyte–insulator–semiconductor (EIS) structure were fabricated with pH sensing capability. To optimize the sensing performance, the membranes were treated with two types of plasma—NH3 and N2O. To investigate the material property improvements, multiple material characterizations were conducted. Material analysis results indicate that plasma treatments with appropriate time could enhance the crystallization, remove the silicate and facilitate crystallizations. Owing to the material optimizations, the pH sensing capability could be greatly boosted. NH3 or N2O plasma treated-Bi2O3 membranes could reach the pH sensitivity around 60 mV/pH and show promise for future biomedical applications.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes12020188