4 years ago

Magnesium Oxide (MgO) pH-sensitive Sensing Membrane in Electrolyte-Insulator-Semiconductor Structures with CF4 Plasma Treatment

Yu Shan Lee, Wei Ming Su, Chyuan-Haur Kao, Chia Lung Chang, Hsiang Chen, Chan-Yu Lin, Chien Cheng Lu, Chen Hao Hong, Yu Tzu Chen
Magnesium oxide (MgO) sensing membranes in pH-sensitive electrolyte-insulator-semiconductor structures were fabricated on silicon substrate. To optimize the sensing capability of the membrane, CF4 plasma was incorporated to improve the material quality of MgO films. Multiple material analyses including FESEM, XRD, AFM, and SIMS indicate that plasma treatment might enhance the crystallization and increase the grain size. Therefore, the sensing behaviors in terms of sensitivity, linearity, hysteresis effects, and drift rates might be improved. MgO-based EIS membranes with CF4 plasma treatment show promise for future industrial biosensing applications.

Publisher URL: https://www.nature.com/articles/s41598-017-07699-3

DOI: 10.1038/s41598-017-07699-3

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