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Abstract A disposable and low-cost pencil graphite electrode was activated by an electrochemical method and a novel metal nanoparticle-polymer nanocomposite film was fabricated and modified on its surface. The surface… Click to show full abstract
Abstract A disposable and low-cost pencil graphite electrode was activated by an electrochemical method and a novel metal nanoparticle-polymer nanocomposite film was fabricated and modified on its surface. The surface morphology and elemental composition of the electrodes were characterized by scanning electron microscopy. The modified electrode showed electrocatalytic ability toward NO oxidation and was applied for sensing. The electrochemical mechanism was characterized. The current corresponding to the oxidation peak increased linearly from 10 nmol/L to 5.7 µmol/L NO with a detection limit of 3.6 nmol/L at a signal-to-noise ratio equal to 3. The nanocomposite film electrode was successfully used to monitor NO released by murine neuroblastoma cells.
Journal Title: Analytical Letters
Year Published: 2021
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