Graphene/LiNbO3 surface acoustic wave device based relative humidity sensor

Y. J. Guo; J. Zhang; C. Zhao; P. A. Hu; X. T. Zu; Y. Q. Fu

doi:10.1016/j.ijleo.2014.06.090

Graphene/LiNbO₃ surface acoustic wave device based relative humidity sensor

Y. J. Guo^*
, J. Zhang
, C. Zhao
, P. A. Hu
, X. T. Zu
, Y. Q. Fu

^*Corresponding author for this work

University of Electronic Science and Technology of China
University of the West of Scotland

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

25 Scopus citations

Abstract

This study described relative humidity (RH) sensing using a graphene/128° YX LiNbO₃ surface acoustic wave (SAW) device. The resonant frequency of the device decreased in a two-stage manner as the RH increased. For a low RH range (RH<50%), a frequency downshift of 1.38 kHz per 1% RH change was observed. This was attributed to mass loading of the SAW propagation surface due to the adsorption of water molecules by the graphene surface. For a high RH range (RH > 50%), a frequency downshift of 2.6 kHz per 1% RH change was obtained, which was due to the change in elastic grapheme properties. The mass loading effect of the water layer was less effective at high temperature, resulting in a lower temperature coefficient of resonant frequency (TCF).

Original language	English
Pages (from-to)	5800-5802
Number of pages	3
Journal	Optik
Volume	125
Issue number	19
DOIs	https://doi.org/10.1016/j.ijleo.2014.06.090
State	Published - 2014

Keywords

Graphene
LiNbO saw device
Relative humidity
TCF

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10.1016/j.ijleo.2014.06.090

Cite this

@article{2b59a17aa6084da8978c5100533a5877,

title = "Graphene/LiNbO3 surface acoustic wave device based relative humidity sensor",

abstract = "This study described relative humidity (RH) sensing using a graphene/128° YX LiNbO3 surface acoustic wave (SAW) device. The resonant frequency of the device decreased in a two-stage manner as the RH increased. For a low RH range (RH<50\%), a frequency downshift of 1.38 kHz per 1\% RH change was observed. This was attributed to mass loading of the SAW propagation surface due to the adsorption of water molecules by the graphene surface. For a high RH range (RH > 50\%), a frequency downshift of 2.6 kHz per 1\% RH change was obtained, which was due to the change in elastic grapheme properties. The mass loading effect of the water layer was less effective at high temperature, resulting in a lower temperature coefficient of resonant frequency (TCF).",

keywords = "Graphene, LiNbO saw device, Relative humidity, TCF",

author = "Guo, \{Y. J.\} and J. Zhang and C. Zhao and Hu, \{P. A.\} and Zu, \{X. T.\} and Fu, \{Y. Q.\}",

year = "2014",

doi = "10.1016/j.ijleo.2014.06.090",

language = "英语",

volume = "125",

pages = "5800--5802",

journal = "Optik",

issn = "0030-4026",

publisher = "Elsevier GmbH",

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}

TY - JOUR

T1 - Graphene/LiNbO3 surface acoustic wave device based relative humidity sensor

AU - Guo, Y. J.

AU - Zhang, J.

AU - Zhao, C.

AU - Hu, P. A.

AU - Zu, X. T.

AU - Fu, Y. Q.

PY - 2014

Y1 - 2014

N2 - This study described relative humidity (RH) sensing using a graphene/128° YX LiNbO3 surface acoustic wave (SAW) device. The resonant frequency of the device decreased in a two-stage manner as the RH increased. For a low RH range (RH<50%), a frequency downshift of 1.38 kHz per 1% RH change was observed. This was attributed to mass loading of the SAW propagation surface due to the adsorption of water molecules by the graphene surface. For a high RH range (RH > 50%), a frequency downshift of 2.6 kHz per 1% RH change was obtained, which was due to the change in elastic grapheme properties. The mass loading effect of the water layer was less effective at high temperature, resulting in a lower temperature coefficient of resonant frequency (TCF).

AB - This study described relative humidity (RH) sensing using a graphene/128° YX LiNbO3 surface acoustic wave (SAW) device. The resonant frequency of the device decreased in a two-stage manner as the RH increased. For a low RH range (RH<50%), a frequency downshift of 1.38 kHz per 1% RH change was observed. This was attributed to mass loading of the SAW propagation surface due to the adsorption of water molecules by the graphene surface. For a high RH range (RH > 50%), a frequency downshift of 2.6 kHz per 1% RH change was obtained, which was due to the change in elastic grapheme properties. The mass loading effect of the water layer was less effective at high temperature, resulting in a lower temperature coefficient of resonant frequency (TCF).

KW - Graphene

KW - LiNbO saw device

KW - Relative humidity

KW - TCF

UR - https://www.scopus.com/pages/publications/85027935773

U2 - 10.1016/j.ijleo.2014.06.090

DO - 10.1016/j.ijleo.2014.06.090

M3 - 文章

AN - SCOPUS:85027935773

SN - 0030-4026

VL - 125

SP - 5800

EP - 5802

JO - Optik

JF - Optik

IS - 19

ER -

Graphene/LiNbO₃ surface acoustic wave device based relative humidity sensor

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Keywords

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