Subtorr operation of a miniature gas ionization sensor based on gold nanowires

Ramin Banan Sadeghian, Nicoleta Chivu, Mojtaba Kahrizi

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Vertically aligned freestanding gold nanowires (AuNWs) were synthesized and deposited on one of the electrodes of a capacitor-like gas ionization cell, whereas the counterelectrode was a polished silicon wafer coated with aluminum on both sides. The field enhancement property of high-aspect-ratio AuNWs was employed to reduce the gaseous breakdown voltage (Vb) at room temperature. The device was characterized in low-pressure air, and tested in subtorr argon where it demonstrated a considerable reduction in Vb compared with uniform field conditions and with its earlier counterparts. The dependences of Vb and prebreakdown currents on the polarity of applied voltage were studied. A particle-in-cell/Monte-Carlo-collision (PIC/MCC) model for the device was also developed to simulate the breakdown process within the same pressure range in which measurements were carried out. The simulated Vb-P curve showed good agreement with the measured characteristics.

    Original languageEnglish
    Pages (from-to)53-64
    Number of pages12
    JournalSensors and Materials
    Volume21
    Issue number1
    Publication statusPublished - 2009 Jun 9

    Keywords

    • PIC/MCC
    • field enhancement
    • gas ionization sensors
    • gold nanowires

    ASJC Scopus subject areas

    • Instrumentation
    • Materials Science(all)

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  • Cite this

    Banan Sadeghian, R., Chivu, N., & Kahrizi, M. (2009). Subtorr operation of a miniature gas ionization sensor based on gold nanowires. Sensors and Materials, 21(1), 53-64.