Title :
Nanostructured Silver Films for Surface Plasmon Resonance-Based Gas Sensors
Author :
Kitenge, Denis ; Joshi, Rakesh K. ; Hirai, Makoto ; Kumar, Ashok
Author_Institution :
Dept. of Mech. Eng., Univ. of South Florida, Tampa, FL, USA
Abstract :
We report the room temperature detection of carbon monoxide (CO) and hydrogen (H2) by nanostructured silver films via surface plasmon resonance (SPR) phenomena. Thin films of Ag and yittrium stabilized zirconea (YSZ): Ag were prepared by pulsed laser deposition (PLD) method. Films were characterized by XRD and atomic force microscopy. CO and H2 are selected as the target gases for the YSZ: Ag films and the sensor characteristics are compared. Sensitivity was estimated by percent change in wavelength for SPR band peak. The nanostructured films were tested for different concentration of CO (100 to 1000 ppm) and hydrogen (1 to 10%). The sensors were also tested for the cross selectivity of the gases. The sensors have a detection limit of 100 ppm for CO and also show a noticeable signal for hydrogen in the concentration range as low as 1%.
Keywords :
X-ray diffraction; atomic force microscopy; gas sensors; pulsed laser deposition; surface plasmon resonance; XRD; atomic force microscopy; nanostructured silver films; pulsed laser deposition; room temperature carbon monoxide detection; surface plasmon resonance-based gas sensors; Atomic force microscopy; Gas detectors; Gases; Hydrogen; Plasmons; Pulsed laser deposition; Resonance; Sensor phenomena and characterization; Silver; Testing; Gas sensors; silver films; surface plasmon resonance;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2009.2031168
