Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020201004 - ACOUSTOFLUIDIC DEVICE

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

1. An acoustofluidic device comprising:

- at least one interdigitated transducer (IDT) deposited on the surface of a piezoelectric substrate; and

- functionally coupled therewith at least one channel having a first end and second end forming a fluid flow path, wherein said channel is positioned adjacent said at least one IDT and comprises a first sidewall; a second sidewall; a floor and an acoustic wave source defining a roof of the channel.

2. The device according to claim 1 comprising at least a pair of interdigitated transducers (IDTs) deposited on the surface of a piezoelectric substrate to form at least one standing surface acoustic wave (SSAW) transducer wherein the at least one channel is positioned between said at least one pair of IDTs.

3. The device according to any preceding claim wherein said piezoelectric substrate is selected from the group comprising: polyvinylidene difluoride (PVDF), Gallium Nitride (GaN), Aluminium nitride (AIN), Silicon carbide (SiC), Aluminum Gallium Nitride (AIGaN), Langasite
Gallium orthophosphate , a Lithium niobate

Lithium tantalate
Barium titanate Lead

zirconate titanate with or more commonly

known as PZT), Potassium niobate Sodium tungstate

and Zinc oxide (ZnO).


4. The device according to any preceding claim wherein said piezoelectric substrate is Lithium niobate


5. The device according to any preceding claim wherein the longitudinal axis of said channel is substantially orthogonal with respect to said IDT(s).

6. The device according to any one of claims 1 -4 wherein the longitudinal axis of said channel is provided at an angle with respect to said IDT(s).

7. The device according to claim 6 wherein said angle is between 0 and 90 degrees or any 1 degree increment therebetween.

8. The device according to any preceding claim wherein said channel floor and/or walls is manufactured from a material selected from the group comprising:, polycarbonates or polymethyl methacrylates, polyphenylsulfone (PPS), glass, silicone, ceramic, elastomers, thermoset polyester (TPE), poly-methyl methacrylate (PMMA), polystyrene (PS), polycarbonate (PC), poly-ethylene glycol diacrylate (PEGDA), teflons, polyurethane (PU), paper, hydrogels, pyrex and polydimethyl siloxane (PDMS).

9. The device according to any preceding claim wherein said channel floor and/or walls is manufactured from a material selected from the group comprising: PDMS and silicone.

10. The device according to any preceding claim wherein said acoustic wave source is provided as a further at least one interdigitated transducer (IDT) deposited on the surface of a piezoelectric substrate or a standing surface acoustic wave (SSAW) transducer.

11. The device according to any preceding claim wherein said acoustic wave source is provided as a further standing surface acoustic wave (SSAW) transducer.

12. The device according to any one of claims 10 or 11 wherein said at least one IDT deposited on the surface of a piezoelectric substrate and said acoustic wave source are configured such that, in use, a phase difference of between about Df=tt/2 and Df=3tt/2 exists between the acoustic wave(s) originating in said piezoelectric substrate and the acoustic wave(s) originating in said roof of the channel.

13. The device according to claim 12 wherein, in use, a phase difference of between about Df=p exists between the acoustic wave(s) originating in said piezoelectric substrate and the acoustic wave(s) originating in said roof of the channel.

14. The device according to any one of claims 1 -9 wherein said acoustic wave source is provided as a bulk acoustic wave (BAW) piezoelectric transducer producing bulk acoustic waves (BAWs).

15. The device according to claim 14 wherein said BAW piezoelectric transducer is a piezoelectric ceramic.

16. The device according to claim 15 wherein said piezoelectric transducer is


17. The device according to any preceding claim wherein said channel has a width to height ratio of between about 10: 1 and 1 : 1 .

18. The device according to any preceding claim wherein said channel has a width between about 10-1000 mm and a height between about 1 -250 mm including every 1 mm therebetween.

19. The device according to any preceding claim wherein the channel comprises at least one inlet configured to introduce a fluid into a proximal end portion of the channel and/or at least one outlet which is located at a downstream portion of the channel positioned substantially along the longitudinal axis of the channel.

20. The device according to claim 19 wherein said inlet(s) and/or outlet(s) are branched to permit separation of particles into different flow streams.

21 . The device according to any preceding claim wherein said device comprises a plurality of channels in fluid communication with one another.

22. The device according to claim 21 wherein each channel is functionally coupled with at least one IDT deposited on the surface of a piezoelectric substrate or a SSAW transducer such that each channel can separate different particles with respect to one another according to the standing wave generated for each respective channel.

23. The device according to any preceding claim wherein the at least one IDT or SSAW transducer and/or acoustic wave source can generate a resonance frequency, or a mean resonance frequency, of between about 100 KHz to 1000 M Hz

24. The device according to claim 23 wherein the at least one IDT or SSAW transducer and/or acoustic wave source can generate a resonance frequency, or a mean resonance frequency, of between about 1 MHz to 60 MHz.

25. A method for separating a mixture of particles comprising use of the device according to any one of claims 1 -24.