UV radiation and CH4 gas detection with a single ZnO:Pd nanowire

O. Lupan; R. Adelung; V. Postica; N. Ababii; L. Chow; B. Viana; T. Pauporté

doi:10.1117/12.2249841

24 February 2017 UV radiation and CH₄ gas detection with a single ZnO:Pd nanowire

O. Lupan, R. Adelung, V. Postica, N. Ababii, L. Chow, B. Viana, T. Pauporté

Proceedings Volume 10105, Oxide-based Materials and Devices VIII; 101051Y (2017) https://doi.org/10.1117/12.2249841
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

There is an increasing demand for sensors to monitor environmental levels of ultraviolet (UV) radiation and pollutant gases. In this work, an individual nanowire of Pd modified ZnO nanowire (ZnO:Pd NW) was integrated in a nanosensor device for efficient and fast detection of UV light and CH₄ gas at room temperature. Crystalline ZnO:Pd nanowire/nanorod arrays were synthesized onto fluorine doped tin oxide (FTO) substrates by electrochemical deposition (ECD) at relative low-temperatures (90 °C) with different concentrations of PdCl₂ in electrolyte solution and investigated by SEM and EDX. Nanodevices were fabricated using dual beam focused electron/ion beam (FIB/SEM) system and showed improved UV radiation response compared to pristine ZnO NW, reported previously by our group. The UV response was increased by one order in magnitude (≈ 11) for ZnO:Pd NW. Gas sensing measurements demonstrated a higher gas response and rapidity to methane (CH₄ gas, 100 ppm) at room temperature, showing promising results for multifunctional applications. Also, due to miniature size and ultra-low power consumption of these sensors, it is possible to integrate them into portable devices easily, such as smartphones, digital clock, flame detection, missile lunching and other smart devices.

Citation Download Citation

O. Lupan, R. Adelung, V. Postica, N. Ababii, L. Chow, B. Viana, and T. Pauporté "UV radiation and CH₄ gas detection with a single ZnO:Pd nanowire", Proc. SPIE 10105, Oxide-based Materials and Devices VIII, 101051Y (24 February 2017); https://doi.org/10.1117/12.2249841

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