Study on pH sensing properties of RF magnetron sputtered tantalum pentoxide (Ta2O5) thin film

The pH-sensing properties of tantalum pentoxide (Ta 2 O 5 ) film deposited by RF magnetron reactive sputtering method is demonstrated. The tantalum pentoxide film on silicon wafer samples were characterized by capacitance-voltage (C-V) measurements. The samples were annealed in ambient condition at...

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Hauptverfasser: Bahari, N, Zain, A M, Abdullah, A Z, Sheng, D B C, Othman, M
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Zain, A M
Abdullah, A Z
Sheng, D B C
Othman, M
description The pH-sensing properties of tantalum pentoxide (Ta 2 O 5 ) film deposited by RF magnetron reactive sputtering method is demonstrated. The tantalum pentoxide film on silicon wafer samples were characterized by capacitance-voltage (C-V) measurements. The samples were annealed in ambient condition at 400°C for several hours. High frequency C-V measurements were performed on the wafer samples at pH levels of 4, 7 and 10. Results obtained from the C-V measurements showed good linearity in the selected pH range. The pH sensitivity has reached 62mV/pH, which is better than the theoretical Nernst potential.
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subjects Annealing
Capacitance measurement
Capacitance-voltage characteristics
Frequency measurement
Magnetic properties
Performance evaluation
pH-ISFET
Radio frequency
RF magnetron sputtering
Semiconductor films
sensing membrane
Silicon
Sputtering
Tantalum pentoxide
title Study on pH sensing properties of RF magnetron sputtered tantalum pentoxide (Ta2O5) thin film
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