Multiplex Biosensor

• US 20090124513A1
• Filed: 07/02/2008
• Published: 05/14/2009
• Est. Priority Date: 04/20/2007
• Status: Abandoned Application

• Current Assignee: George Washington University
• Original Assignee: George Washington University
• Inventors: Tigli, Onur, Berg, Patricia, Zaghloul, Mona
• Application Number:
  US12/166,601
• Publication Number:
  US 20090124513A1
• Time in Patent Office: Days
• US Class Current: 506/9
• CPC Class Codes: G01N 2291/0255 (Bio)chemical reactions, e.g. on biosensors
• CPC Class Codes: G01N 2291/0256 Adsorption, desorption, surface mass change, e.g. on biosensors
• CPC Class Codes: G01N 2291/0423 Surface waves, e.g. Rayleigh waves, Love waves
• CPC Class Codes: G01N 29/022 Fluid sensors based on microsensors, e.g. quartz crystal-microbalance [QCM], surface acoustic wave [SAW] devices, tuning forks, cantilevers, flexural plate wave [FPW] devices microdevices per se B81B
• CPC Class Codes: G01N 29/2462 Probes with waveguides, e.g. SAW devices
• CPC Class Codes: G01N 29/326 compensating for temperature variations

Abstract

This invention relates to CMOS SAW-based biosensor devices for detecting analytes and biomolecules of interest.

Claims

1. A biosensor device, comprising:

a CMOS integrated circuit having a SAW device as an on-chip component and configured for an analyte detection assay, wherein the SAW device has an Si substrate having a piezoelectric film thereon, said film supporting an input IDT and an output IDT in cooperative association, and having a biochemical coating there-between for detecting at least one analyte;

wherein the biochemical coating acts as an analyte capture binding surface, and wherein upon binding of said analyte to said biochemical coating a surface acoustic wave signal is generated that is indicative of the presence of the analyte.

2. The biosensor device of claim 1, further comprising wherein the device is configured for parallel multi-analyte, multi-concentration detection assays.

3. The biosensor device of claim 2, wherein the configuration comprises wherein the piezoelectric film comprises a micromachined matrix of addressable microlocations for analyte capture.

4. The biosensor device of claim 1 or 2, further comprising wherein the biosensor has a plurality of detection channels, said detection channels having a plurality of biochemical coatings specific for detection of a plurality of proteins, and which provides for a multi-protein multi-concentration detection array capable of parallel simultaneous read-out.

5. The biosensor device of claim 1, wherein the biochemical coating is for detecting at least one serum tumor marker protein for cancer.

6. The biosensor device of claim 1, wherein the piezoelectric film is deposited on top of the IDT.

7. The biosensor device of claim 1 or 2, wherein the device is configured to provide an electronic readout of the concentration of serum tumor marker as determined from the strength of the SAW signal generated.

8. A method of detecting biomolecules, comprising:

contacting the analyte capture binding surface of the biosensor device of claim 1 with a sample of interest.

9. The method of claim 5, wherein the sample is a serum protein cancer marker.

10. The biosensor of claim 1, further comprising a CMOS manufactured embedded heater under the SAW sensor, wherein the heater is controlled by applying outside voltage, and wherein control of the sensor temperature to the desired value is provided to keep the sensor operating point stable over time.

11. The biosensor of claim 1, further comprising wherein the analyte is a marker protein selected from the group consisting of mammoglobin, BP1, CEA, CA15-3, TPA, TPS, HER-2, and combinations thereof.

12. The invention according to claim 1 or 2, further comprising wherein the biosensor device provides an electronic readout and is implemented in a single unit.

13. A method of detecting a serum tumor marker for breast cancer, comprising:

a) providing a biosensor of claim 1;

b) contacting the biochemical coating of the biosensor with a sample; and

b) detecting the SAW signal,

wherein upon binding of a serum tumor marker to said biochemical coating then a surface acoustic wave signal is generated that is indicative of the presence of the serum tumor marker protein, and wherein upon the absence of binding of the serum tumor marker, then no signal is generated and indicates the absence of said serum tumor marker protein.

14. A method of detecting multiple proteins in samples having multiple concentrations in a multiplex biosensor, comprising:

a) providing the multiplex biosensor of claim 4;

b) contacting each of the plurality of detection channels of the biosensor with sample; and

b) detecting the SAW signal,

wherein upon binding of a specific serum tumor marker to said biochemical coating then a specific surface acoustic wave signal is generated that is indicative of the presence of the specific serum tumor marker protein, and wherein upon the absence of binding of the specific serum tumor marker, then no signal is generated and indicates the absence of said specific serum tumor marker protein, and wherein the multiplex biosensor provides for a multi-protein detection array capable of parallel simultaneous read-out.

15. The method of claim 8, 13 or 14, further comprising the step of determining the concentration of the analyte or serum tumor marker from the strength of the SAW signal generated.