{WO3 Nanoparticle-Based Conformable pH Sensor}
- Citation:
- Santos, L, Neto JP, Crespo A, Nunes D, Costa N, Fonseca IM, Barquinha P, Pereira LÍ, Silva J, Martins R, Fortunato E. 2014. {WO3 Nanoparticle-Based Conformable pH Sensor}. ACS Applied Materials {&} Interfaces. 6:12226–12234., Number 15
Abstract:
pH is a vital physiological parameter that can be used for disease diagnosis and treatment as well as in monitoring other biological processes. Metal/metal oxide based pH sensors have several advantages regarding their reliability, miniaturization, and cost-effectiveness, which are critical characteristics for in vivo applications. In this work, WO3 nanoparticles were electrodeposited on flexible substrates over metal electrodes with a sensing area of 1 mm2. These sensors show a sensitivity of ?56.7 ± 1.3 mV/pH, in a wide pH range of 9 to 5. A proof of concept is also demonstrated using a flexible reference electrode in solid electrolyte with a curved surface. A good balance between the performance parameters (sensitivity), the production costs, and simplicity of the sensors was accomplished, as required for wearable biomedical devices.
Notes:
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