Centrifugal microfluidic device
AssigneeRoyal Melbourne Institute of Technology
InventorsJames Friend, Leslie Yu-Ming Yeo, Peggy Chan, Nicholas Glass, Richard Shilton
Life of this patent
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Abstract
Disclosed is a centrifugal microfluidic device comprising a piezoelectric substrate; a rotatable platform device on the substrate; and at least one transducer on the substrate, the transducer being configured to generate a surface acoustic wave that propagates on the surface of the substrate and contacts the rotatable platform device asymmetrically to transfer energy thereto with a lateral distribution to cause rotation of the rotatable platform device. The device may be a microfluidic valve, a microfluidic mixer or a microfluidic particle concentrator.
Claims17
A centrifugal microfluidic device comprising:
- a piezoelectric substrate;
- a rotatable platform device on the substrate, the rotatable platform device comprising a platform and a fluid coupling layer, the fluid coupling layer positioned on a region of the substrate and between the substrate and the platform;
- and
- at least one transducer on the substrate, the at least one transducer being configured to generate a surface acoustic wave that propagates on a surface of the substrate and contacts the rotatable platform device asymmetrically to transfer energy thereto with a lateral distribution to cause rotation of the rotatable platform device,
- wherein the platform comprises a microfluidic structure on an upper surface thereof, the microfluidic structure comprising at least one microfluidic channel.
A microfluidic valve comprising:
- a. piezoelectric substrate;
- a rotatable platform device on the substrate, the rotatable platform device comprising a platform and a fluid coupling layer, the fluid coupling layer positioned on a region of the substrate and between the substrate and the platform, the platform comprising a microfluidic structure comprising an inlet reservoir in fluid connection via a radially disposed microfluidic channel with an outlet reservoir, the inlet reservoir positioned radially inwardly of the outlet reservoir;
- and
- at least one transducer on the substrate, the at least one transducer being configured to generate a surface acoustic wave that propagates on a surface of the substrate and contacts the rotatable platform device asymmetrically to transfer energy thereto with a lateral distribution to cause rotation of the platform such that when the radial acceleration resulting from rotation of the platform is greater than the capillary force retarding the meniscus of a fluid in the inlet reservoir the fluid passes from the inlet reservoir to the outlet reservoir.
A microfluidic mixer comprising:
- a piezoelectric substrate;
- a rotatable platform device on the substrate, the rotatable platform device comprising a platform and a fluid coupling layer, the fluid coupling layer positioned on a region of the substrate and between the substrate and the platform, the platform comprising a microfluidic structure comprising at least two inlet reservoirs each of which is in fluid connection via a radially disposed microfluidic channel with a common outlet reservoir, the inlet reservoirs positioned radially inwardly of the outlet reservoir;
- and
- at least one transducer on the substrate, the at least one transducer being configured to generate a surface acoustic wave that propagates on a surface of the substrate and contacts the rotatable platform device asymmetrically to transfer energy thereto with a lateral distribution to, cause rotation of the platform such that when the radial acceleration resulting from rotation of the platform is, greater than the capillary force retarding the meniscus of a fluid in each of the inlet reservoirs each fluid passes from each inlet reservoir to the owlet reservoir.
Dependencies are inferred from the claim text.