Graphene/LiNbO3 surface acoustic wave device based relative humidity sensor

Yuanjun Guo; Jia Zhang; Chao Zhao; Ping An Hu; Xiao-Tao Zu; Yong Qing Fu

doi:10.1016/j.ijleo.2014.06.090

Graphene/LiNbO3 surface acoustic wave device based relative humidity sensor

Yuanjun Guo, Jia Zhang, Chao Zhao, Ping An Hu, Xiao-Tao Zu, Yong Qing Fu

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

19 Citations (Scopus)

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
Journal	Optik - International Journal for Light and Electron Optics
Volume	125
Issue number	19
DOIs	https://doi.org/10.1016/j.ijleo.2014.06.090
Publication status	Published - Oct 2014

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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, LiNbO3 SAW device, relative humidity, TCF",

author = "Yuanjun Guo and Jia Zhang and Chao Zhao and Hu, {Ping An} and Xiao-Tao Zu and Fu, {Yong Qing}",

year = "2014",

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

language = "English",

volume = "125",

pages = "5800--5802",

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TY - JOUR

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

AU - Guo, Yuanjun

AU - Zhang, Jia

AU - Zhao, Chao

AU - Hu, Ping An

AU - Zu, Xiao-Tao

AU - Fu, Yong Qing

PY - 2014/10

Y1 - 2014/10

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 - LiNbO3 SAW device

KW - relative humidity

KW - TCF

U2 - 10.1016/j.ijleo.2014.06.090

DO - 10.1016/j.ijleo.2014.06.090

M3 - Article

VL - 125

SP - 5800

EP - 5802

JO - Optik

JF - Optik

SN - 0030-4026

IS - 19

ER -

Graphene/LiNbO3 surface acoustic wave device based relative humidity sensor

Abstract

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