Damping Force and Loading Position Dependence of Mass Sensitivity of Magnetoelastic Biosensors in Viscous Liquid

Kewei Zhang; Zhe Chen; Qianke Zhu; Yong Jiang; Wenfeng Liu; Peixuan Wu

doi:10.3390/s19010067

Damping Force and Loading Position Dependence of Mass Sensitivity of Magnetoelastic Biosensors in Viscous Liquid

Sensors (Basel). 2018 Dec 25;19(1):67. doi: 10.3390/s19010067.

Authors

Kewei Zhang^{1

2}, Zhe Chen^{3

4}, Qianke Zhu^{5

6}, Yong Jiang^{7

8}, Wenfeng Liu^{9

10}, Peixuan Wu¹¹

Affiliations

¹ School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China. drzkw@126.com.
² The Key Laboratory of Magnetic and Electric Functional Materials and Applications of Shanxi Province. drzkw@126.com.
³ School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China. drchenzhe@163.com.
⁴ The Key Laboratory of Magnetic and Electric Functional Materials and Applications of Shanxi Province. drchenzhe@163.com.
⁵ School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China. drzhuqianke@126.com.
⁶ The Key Laboratory of Magnetic and Electric Functional Materials and Applications of Shanxi Province. drzhuqianke@126.com.
⁷ School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China. yjiang@ustb.edu.cn.
⁸ The Key Laboratory of Magnetic and Electric Functional Materials and Applications of Shanxi Province. yjiang@ustb.edu.cn.
⁹ School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China. WFLiu@tyust.edu.cn.
¹⁰ The Key Laboratory of Magnetic and Electric Functional Materials and Applications of Shanxi Province. WFLiu@tyust.edu.cn.
¹¹ Guangdong Provincial Key Laboratory of Micro-nano Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou, Guangdong 510006, China. peixuan@gdut.edu.cn.

Abstract

We established the vibration governing equation for a magnetoelastic (ME) biosensor with target loading in liquid. Based on the equation, a numerical simulation approach was used to determine the effect of the target loading position and viscous damping coefficient on the node ("blind points") and mass sensitivity (S_m) of an ME biosensor under different order resonances. The results indicate that viscous damping force causes the specific nodes shift but does not affect the overall variation trend of S_m as the change of target loading position and the effect on Sm gradually reduces when the target approaches to the node. In addition, S_m decreases with the increase of viscous damping coefficient but the tendency becomes weak at high-order resonance. Moreover, the effect of target loading position on S_m decreases with the increase of viscous damping coefficient. Finally, the results provide certain guidance on improving the mass sensitivity of an ME biosensor in liquid by controlling the target loading position.

Keywords: biosensor; damping force; magnetoelastic; sensitivity.

MeSH terms

Biosensing Techniques*
Mechanical Phenomena
Molecular Weight
Physical Phenomena*
Vibration
Viscosity*

Abstract

MeSH terms

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