High sensitive microfluidic flow sensor based on aligned piezoelectric nanofibers

ZHANG Lingling; YU Xiaolei; YOU Sujian; LIU Huiqin; ZHANG Cancan; CAI Bo; XIAO Liang; LIU Wei; GUO Shishang; ZHAO Xingzhong

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High sensitive microfluidic flow sensor based on aligned piezoelectric nanofibers

ZHANG Lingling #,YU Xiaolei,YOU Sujian,LIU Huiqin,ZHANG Cancan,CAI Bo,XIAO Liang,LIU Wei,GUO Shishang *,ZHAO Xingzhong

Key Laboratory of Artificial Micro/Nano structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072

*Correspondence author

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Funding: Research Fund for the Doctoral Program of Higher Education of China（No.20130141110059）, National Science Fund for Talent Training in Basic Science（No.J1210061）, National Natural Science Foundation of China （No.51132001, 51272184, 81572860）, Fundamental Research Funds for the Central Universities （No.2042014kf0235）

Opened online:26 October 2015

Accepted by: none

Citation: ZHANG Lingling,YU Xiaolei,YOU Sujian.High sensitive microfluidic flow sensor based on aligned piezoelectric nanofibers[OL]. [26 October 2015] http://en.paper.edu.cn/en_releasepaper/content/4658132

A microfluidic flow sensor based on aligned polyvinylidene fluoride trifluoroethylene P(VDF-TrFE) piezoelectric nanofibers has been developed, which can be used for real-time detection of low flow rate and viscosity in microchannels. The detection principle dependence of voltage drop output by nanofibers while sensing pressure drop along the microchannel. Due to the high sensitivity of nanofibers, this sensor responded linearly to low flow rates ranging from 13 µl/h to 451 µl/h, and viscosities of ethylene glycol aqueous solution ranging from 1 mPa•S to 16.1 mPa•S at 25℃, respectively. These findings highlight the potential of P(VDF-TrFE) nanofibers in multifunctional sensors.

Keywords:piezoelectric; P(VDF-TrFE); nanofibers; flow sensor

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