| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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High sensitivity gravimetric sensor made of unidirectional carbon fiber epoxy composite on (1-x)Pb(Zn1/3Nb2/3)O3- xPbTiO3 single crystal substrate |
| Huang Nai-Xing (黄乃兴)a b, Lü Tian-Quan (吕天全)a, Zhang Rui (张锐)a, Cao Wen-Wu (曹文武)a c |
a Condensed Matter Science and Technology Institute, Department of Physics, Harbin Institute of Technology, Harbin 150080, China;
b Department of Physics, College of Electronic Science, Northeast Petroleum University, Daqing 163318, China;
c Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA |
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Abstract We have derived a general formula for sensitivity optimization of gravimetric sensors and have used it to design a high sensitivity gravimetric sensor using unidirectional carbon fiber epoxy composite (CFEC) waveguide layer on (1-x)Pb(Zn1/3Nb2/3)O3-xPbTiO3 (PZN-xPT) single crystal substrate with the carbon fibers parallel to the x1 and x2 axes, respectively. The normalized maximum sensitivity (|Smf|λ)max exhibits an increasing tendency with the decrease of (h/λ ight)opt and the maximum sensitivity (|Smf|λ)max increases with the elastic constant c66E of the piezoelectric substrate material. For the CFEC/[011]c poled PZN-7%PT single crystal sensor configuration, with the carbon fibers parallel to the x1 axis at λ = 24 μm, the maximum sensitivity |Smf|max can reach as high as 1156 cm2/g, which is about three times that of a traditional SiO2/ST quartz structure gravimetric sensor. The better design selection is to have the carbon fibers parallel to the direction of propagation of Love wave in order to obtain the best sensitivity.
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Received: 23 April 2014
Revised: 19 May 2014
Accepted manuscript online:
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PACS:
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77.84.-s
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(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
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52.35.Mw
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(Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.))
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77.65.Dq
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(Acoustoelectric effects and surface acoustic waves (SAW) in piezoelectrics)
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07.07.Df
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(Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)
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| Fund: Project supported by the National Basic Research Program of China (Grant No. 2013CB632900). |
Corresponding Authors:
Lü Tian-Quan, Zhang Rui
E-mail: ltq@hit.edu.cn;ruizhang_ccmst@hit.edu.cn
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Cite this article:
Huang Nai-Xing (黄乃兴), Lü Tian-Quan (吕天全), Zhang Rui (张锐), Cao Wen-Wu (曹文武) High sensitivity gravimetric sensor made of unidirectional carbon fiber epoxy composite on (1-x)Pb(Zn1/3Nb2/3)O3- xPbTiO3 single crystal substrate 2014 Chin. Phys. B 23 117704
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