Mr. A. S. M. Iftekhar Uddin Profile

A. S. M. Iftekhar Uddin

PhD student at Univ of Ulsan

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Proceedings Article | 27 February 2016 Paper

A novel flexible C2H2 gas sensor based on Ag-ZnO nanorods on PI/PTFE substrate

A. S. M. Iftekhar Uddin, Gwiy-Sang Chung

Proceedings Volume 9749, 97491T (2016) https://doi.org/10.1117/12.2202508

KEYWORDS: Nanorods, Gas sensors, Zinc oxide, Silver, Nanoparticles, Sensors, Sputter deposition, Nanostructures, Metals, Transmission electron microscopy, Oxides

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In this work a novel flexible acetylene (C₂H₂) gas sensor based on Ag nanoparticles decorated vertical ZnO nanorods (Ag-ZnO NRs) on PI/PTFE substrate has been investigated. The grown structure was synthesized through a simple, rapid, and low-temperature hydrothermal-RF magnetron sputtering method. The successful immobilization of Ag nanoparticles (NPs) onto the surface of ZnO nanorods contributed large effective surface area and facilitated the charge transfer process. The as-fabricated sensor exhibited enhanced C₂H₂ sensing performances at low temperature (200°C) including a broad detection range (3 - 1000 ppm), and short recovery time (39 sec). Mechanical robustness and device flexibility were investigated at different curvature angle (0 - 90°) and several times bending-relaxing process (0 – 5 × 10⁵ times). The sensor exhibited stable response magnitude with a negligible drift of ~ 2.1% for a maximum bending angle of 90o and a response drop of 8% after 5 × 10⁴ bending/relaxing processes. The superior sensing features along with outstanding flexibility to extreme bending stress indicate the sensor a promising candidate for the development of practical flexible C₂H₂ gas sensors.

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