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- Title
pH Measurement at Elevated Temperature with Vessel Gate and Oxygen-Terminated Diamond Solution Gate Field Effect Transistors.
- Authors
Kawaguchi, Shuto; Nomoto, Reona; Sato, Hirotaka; Takarada, Teruaki; Chang, Yu Hao; Kawarada, Hiroshi
- Abstract
Diamond has many appealing properties, including biocompatibility, ease of surface modification, and chemical–physical stability. In this study, the temperature dependence of the pH-sensitivity of a oxygen-terminated boron-doped diamond solution gate FET (C-O BDD SGFET) is reported. The C-O BDD SGFET operated in an electrolyte solution at 95 °C. At 80 °C, the pH sensitivity of C-O BDD SGFET dropped to 4.27 mV/pH. As a result, we succeeded in developing a highly sensitive pH sensing system at −54.6 mV/pH at 80 °C by combining it with a highly pH sensitive stainless-steel vessel.
- Subjects
FIELD-effect transistors; HIGH temperatures; DIAMONDS; TEMPERATURE measurements; ORGANIC field-effect transistors; ELECTROLYTE solutions; TRANSISTORS
- Publication
Sensors (14248220), 2022, Vol 22, Issue 5, pN.PAG
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s22051807