All-optical graphene oxide humidity sensors

Weng Hong Lim; Yuen Kiat Yap; Wu Yi Chong; Harith Ahmad

doi:10.3390/s141224329

All-optical graphene oxide humidity sensors

Weng Hong Lim
, Yuen Kiat Yap
, Wu Yi Chong^*
, Harith Ahmad

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

73 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	24329-24337
Number of pages	9
Journal	Sensors
Volume	14
Issue number	12
DOIs	https://doi.org/10.3390/s141224329
Publication status	Published - 17 Dec 2014

Keywords

Graphene oxide
Humidity sensing
Optical sensing

ASJC Scopus subject areas

Analytical Chemistry
Biochemistry
Atomic and Molecular Physics, and Optics
Instrumentation
Electrical and Electronic Engineering

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10.3390/s141224329Licence: CC BY

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title = "All-optical graphene oxide humidity sensors",

abstract = "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.",

keywords = "Graphene oxide, Humidity sensing, Optical sensing",

author = "Lim, \{Weng Hong\} and Yap, \{Yuen Kiat\} and Chong, \{Wu Yi\} and Harith Ahmad",

note = "Publisher Copyright: {\textcopyright} 2014 by the authors; licensee MDPI, Basel, Switzerland.",

year = "2014",

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day = "17",

doi = "10.3390/s141224329",

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T1 - All-optical graphene oxide humidity sensors

AU - Lim, Weng Hong

AU - Yap, Yuen Kiat

AU - Chong, Wu Yi

AU - Ahmad, Harith

PY - 2014/12/17

Y1 - 2014/12/17

N2 - 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.

AB - 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.

KW - Graphene oxide

KW - Humidity sensing

KW - Optical sensing

UR - https://www.scopus.com/pages/publications/84919361014

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DO - 10.3390/s141224329

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VL - 14

SP - 24329

EP - 24337

JO - Sensors

JF - Sensors

IS - 12

ER -

All-optical graphene oxide humidity sensors

Abstract

Keywords

ASJC Scopus subject areas

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