A surface acoustic wave micropump to pump fluids from a droplet into a closed microchannel using evaporation and capillary effects | Zendy

An-Liang Zhang | Zendy; Yan Zha | Zendy; Jiansheng Zhang | Zendy

Open Access

A surface acoustic wave micropump to pump fluids from a droplet into a closed microchannel using evaporation and capillary effects

Author(s) -

An-Liang Zhang,

Yan Zha,

Jiansheng Zhang

Publication year - 2014

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4905062

Subject(s) - microchannel , micropump , interdigital transducer , materials science , surface acoustic wave , piezoelectricity , capillary action , substrate (aquarium) , microfluidics , evaporation , acoustic streaming , polydimethylsiloxane , transducer , flow velocity , acoustic wave , acoustics , optoelectronics , flow (mathematics) , ultrasonic sensor , composite material , nanotechnology , mechanics , physics , thermodynamics , oceanography , geology

A new method for converting a microdroplet on a piezoelectric substrate into continuous fluid flow in microchannels is presented. An interdigital transducer with 27.5 MHz center frequency is fabricated on a 1280 yx-LiNbO3 piezoelectric substrate for exciting surface acoustic wave. A PDMS (Polydimethylsiloxane) microchannel is mounted on the piezoelectric substrate. One end of the microchannel is connected with water absorbing paper, while the other end of the microchannel is in touch with a droplet to be converted. The surface acoustic wave is used for controlling the evaporation velocity of the fluid in the microchannel. Part of fluid in the droplet can be entered into the microchannel and transported there due to the evaporation and capillary effects. Red dye solution is used to demonstrate the conversion of the droplet and the transportation of the fluid in the microchannel. Results show that the droplet on the piezoelectric substrate can successfully be converted into continuous fluid. The flow velocity is increased with the power of the electric signal applied to the interdigital transducer. Average flow velocity is 0.0235μl/s when the power of the electric signal is 30.0dBm. The work is helpful for piezoelectric microfluidic devices for biochemical analysis

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research