All-optical graphene oxide humidity sensors

Lim, Weng Hong and Yap, Yuen Kiat and Chong, Wu Yi and Ahmad, Harith (2014) All-optical graphene oxide humidity sensors. Sensors, 14 (12). pp. 24329-24337.

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The optical characteristics of graphene oxide (GO) were explored to design and fabricate a GO-based optical humidity sensor. GO film was coated onto a SU8 polymer channel waveguide using the drop-casting technique. The proposed sensor shows a high TE-mode absorption at 1550 nm. Due to the dependence of the dielectric properties of the GO film on water content, this high TE-mode absorption decreases when the ambient relative humidity increases. The proposed sensor shows a rapid response (<1 s) to periodically interrupted humid air flow. The transmission of the proposed sensor shows a linear response of 0.553 dB/% RH in the range of 60% to 100% RH.

Item Type: Article
Uncontrolled Keywords: Graphene oxide; humidity sensing; optical sensing
Subjects: Q Science > Q Science (General)
Depositing User: MR Faizal II H
Date Deposited: 28 Jan 2016 01:24
Last Modified: 11 Oct 2018 02:58

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