Humidity sensing behavior of silicon nanowires with hexamethyldisilazane modification

Xuejiao Chen, Jian Zhang, Zhiliang Wang, Qiang Yan, Shichao Hui

Research output: Contribution to journalArticlepeer-review

73 Scopus citations

Abstract

In this paper, the sensing behavior of the capacitive humidity sensors based on silicon nanowires with and without hexamethyldisilazane (HMDS) modification has been investigated. The sensing mechanism is based on the capacitance variations due to the adsorption/desorption of water molecules among silicon nanowires. The effect of HMDS modification on the sensor's performance was discussed. The study indicated that after HMDS treatment, the sensor's surface turns into hydrophobic and the sensor's performance such as the linearity, hysteresis and response time can be improved remarkably.

Original languageEnglish
Pages (from-to)631-636
Number of pages6
JournalSensors and Actuators B: Chemical
Volume156
Issue number2
DOIs
StatePublished - Aug 2011

Keywords

  • Hexamethyldisilazane
  • Humidity Sensing Behavior
  • Hydrophobic
  • Silicon Nanowires

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