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Technical Note
Disposable Planar Reference Electrode Based on Carbon Nanotubes and Polyacrylate Membrane
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Section:Abstract
In this technical note, we report a new all-solid-state planar reference electrode based on single-walled carbon nanotubes and photocured poly(n-butylacrylate) (poly(nBA)) membrane containing the Ag/AgCl/Cl– ion system. Single-walled carbon nanotubes functionalized with octadecylamide (SWCNT-ODA) and deposited by drop-casting onto a disposable screen-printed electrode are an excellent all-solid-state transducer. The novel potentiometric planar reference electrode shows low potential variability (calibration slopes inferior to 2 mV/dec) for a wide range of chemical species (i.e., ions, small molecules, proteins) in a wide calibration range, redox pairs, changes in pH, and changes in ambient light. Potentiometric medium-term signal stability (−0.9 ± 0.2 mV/h) and electrochemical impedance characterization confirm the correct solid contact between the SWCNT-ODA layer and photocured poly(nBA) membrane. Overall, the materials used and the simple fabrication by screen-printing and drop-casting enable a high throughput and highly parallel and cost-effective mass manufacture of the new disposable reference electrode. Moreover, the reference electrode has a long shelf life, a characteristic that can be of special interest in decentralized and multiplexing potentiometric analysis.
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This article has been cited by 1 ACS Journal articles (1 most recent appear below).
Potentiometric Strip Cell Based on Carbon Nanotubes as Transducer Layer: Toward Low-Cost Decentralized Measurements
F. Xavier Rius-Ruiz, Gastón A. Crespo, Diego Bejarano-Nosas, Pascal Blondeau, Jordi Riu, and F. Xavier RiusAnalytical Chemistry2011 83 (22), 8810-8815Potentiometric Strip Cell Based on Carbon Nanotubes as Transducer Layer: Toward Low-Cost Decentralized Measurements
F. Xavier Rius-Ruiz, Gastón A. Crespo, Diego Bejarano-Nosas, Pascal Blondeau, Jordi Riu, and F. Xavier RiusAnalytical Chemistry2011 83 (22), 8810-8815In this study, we developed a potentiometric planar strip cell based on single-walled carbon nanotubes that aims to exploit the attributes of solid-contact ion-selective electrodes for decentralized measurements. That is, the ion-selective and reference ...
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History
- Published In Issue July 15, 2011
- Article ASAPJune 16, 2011
- Just Accepted ManuscriptMay 31, 2011
- Received: March 10, 2011
Accepted: May 31, 2011
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