Mathematical Modeling of a Plasmonic Palladium-Based Hydrogen Sensor

作者：Teutsch Tanja; Strohfeldt Nikolai; Sterl Florian; Warsewa Alexander; Herkert Ediz; Paone Domenico; Giessen Harald; Tarin Cristina

来源：IEEE Sensors Journal, 2018, 18(5): 1946-1959.

DOI：10.1109/JSEN.2017.2786939

• Sensor phenomena and characterization
• nonlinear dynamical systems
• distributed parameter system
• hydrogen gas detector
• optical sensors
• localized surface plasmon resonance

The presented plasmonic palladium-based perfect absorber hydrogen sensor is used to detect hydrogen via measured reflectance spectra. The perfect absorber geometry enables a highly sensitive, cost-effective, miniatuarizable, and purely optical detection system. Through fiber optics, this scheme allows for a clear separation of the detector and all electronic components rendering it inherently safe, even in explosive environments. The sensor has a complex transient behavior, which exhibits temperature-dependence, nonlinearities, and hysteresis. This transient behavior is mathematically represented by a physically motivated model. The derived model is a distributed parameter system, which considers the dispersed hydrogen diffusion in the palladium and describes the nonlinear input and linear output characteristics. Experimental measurements are conducted at 25 degrees C, 30 degrees C, and 40 degrees C to identify the model parameters and to show the model accuracy.

• 出版日期2018-3-1