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Biological application of RuO 2 nanorods grown on a single carbon fiber for the real-time direct nitric oxide sensing

Sensors and Actuators B: Chemical, ISSN: 0925-4005, Vol: 191, Page: 298-304
2014
  • 31
    Citations
  • 0
    Usage
  • 21
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    31
    • Citation Indexes
      31
  • Captures
    21

Article Description

This paper reports the application of single crystalline RuO 2 nanorods grown on a single carbon fiber (RuO 2 nanorods-CF) as a microsensing device for in vivo NO measurement. The electrocatalytic activity of RuO 2 nanorods-CF, synthesized via simple thermal annealing process, toward electrochemical NO oxidation is studied by linear sweep voltammetry. RuO 2 nanorods-CF shows highly enhanced and facilitated NO oxidation activity compared to bare carbon fiber (CF). The amperometric responses to varying concentration of NO verifies that RuO 2 nanorods-CF exhibited ca. 40-fold higher sensitivity than bare CF and sufficient selectivity to NO over common biological interfering species (ascorbic acid, dopamine, nitrite, acetaminophen, and hydrogen peroxide) at greater concentrations than their physiological levels. The observed high sensitivity and selectivity of RuO 2 nanorods-CF are rationally attributed to the substantial real surface area as well as the inherent electroactivity of RuO 2 nanorods. As prepared RuO 2 nanorods-CF is successfully applied for real-time direct NO measurements at the cortical surface of a living rat brain.

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