Acoustic Wave Bio Sensors Pavana Rupa Bondili ECE 5320 Mechatronics Assignment #1

1. Acoustic Wave Bio SensorsPavana Rupa BondiliECE 5320 Mechatronics Assignment #1

2. Acoustic Wave Bio Sensors Outline • Reference list • To probe further • Technology Overview • Bio Sensors And Principle of Operation • Classification of Bio Sensors • Acoustic Wave Bio Sensor • Working Principal And the materials they are made of • Classification Of Bio Sensors • Applications • Conclusion • Vendor List

3. Bio Sensors • Reference List: • Websites used for the survey of the study: • http://www.rpi.edu/dept/chem-eng/Biotech Environ/BIOSEN/biosen.htm • http://ieeexplore.ieee.org/iel2/3521/10600/00495619.pdf?isnumber=10600&prod=STD&arnumber=495619&arnumber=495619&arSt=451&ared=460+vol.1&arAuthor=Andle%2C+J.C.%3B+Vetelino%2C+J.F. • http://en.wikipedia.org/wiki/Biosensor • http://www.ornl.gov/info/ornlreview/rev29_3/text/biosens.htm

4. Bio Sensors • To Probe Further : • Recent Articles: • Biosensors and Other Medical and Environmental Probes By K. Bruce Jacobson. • Introduction to sensors and actuators By Professor Mark Bachman. • “Acoustic wave biosensors” By J. C. Andle and J. F. Vetelino.

5. Bio Sensors: Sounds good! What are these?

6. Bio Sensors Bio sensors serve as the interface between living and electronic systems. The sensor transmits the information from the living system to the electronic system and the transfer is unilateral.

7. How Do They Look Like ?

8. Bio Sensors

9. How Do They Work ?

10. Bio Sensors A biosensor is a sensor that is based on the use of biological material for its sensing function. The bio component specifically reacts or interacts with the analyte of interest resulting in a detectable chemical or physical change. Schematic Diagram Of Bio Sensor:

11. Can We see the Basic design of the Bio Sensor?

12. Bio Sensors

13. On What Basis Are The Bio Sensors Classified?

14. Bio Sensors Types Of Bio Sensors: Calorimetric biosensors, Potentiometric biosensors, Amperometric biosensors, Optical biosensors , Acoustic wave biosensors.

15. Which type of sensor are we interested more in and why?

16. Acoustic Wave Bio Sensors Biosensors made with acoustic wave technology are sensitive, accurate, small, portable, robust, and have excellent aging characteristics. Such sensors can be produced using standard photolithography and hence are inexpensive. We shall look into the working and types of this Bio Sensor.

17. How do these work?

18. Acoustic Wave Bio Sensors Acoustic biosensors utilize different types of acoustic waves to obtain information about the entity being measured .The range of entity measured is wide and includes a spectrum of medical, biochemical and biophysical phenomena. The acoustic waves can be generated and received by a variety of means including piezoelectric, magnetostrictive, optical, and thermal effect.

19. Acoustic Wave Bio Sensors

20. What material is this Bio Sensor made from?

21. Acoustic Wave Bio Sensors • Acoustic biosensors are fabricated with piezoelectric materials in which the electromechanical transduction takes place within the material. Therefore, piezoelectric materials are often called smart materials.

22. Why just piezoelectric materials ?

23. Acoustic Wave Bio Sensors • The piezoelectric materials are also very stable, chemically inert and have excellent mechanical properties and very good aging characteristics. • Acoustic biosensors made with piezoelectric crystals such as quartz or lithiumniobiate are robust, and environmentally stable. • Acoustic biosensors are relatively sensitive, exhibit good resolution and have a good signal-to-noise ratio.

24. Acoustic Wave Bio Sensors • Piezoelectric sensor materials is that the same electromechanical transduction mechanism can be used not only for a sensing but also for an actuation. Therefore, it is possible to develop smart bio structures in which both sensing and actuating are realized within the same piezoelectric technology platform.

25. How are the Acoustic Wave Bio Sensors Classified Further ?

26. Acoustic Wave Bio Sensors • Acoustic sensors can be divided into three groups: • Homogeneous Acoustic Biosensor • Hybrid Acoustic Biosensor • Transmission Acoustic Biosensor

27. Can we know more about these classifications ?

28. Acoustic Wave Bio Sensors • Homogeneous Acoustic Biosensor: In this configuration an acoustic sensor consists of the piezoelectric element itself and the measurand directly influences electro acoustic properties of the element. Examples of such sensors include piezoelectric liquid density and viscosity sensors.

29. Acoustic Wave Bio Sensors • Hybrid Acoustic Biosensor: In this case a sensor consists of the piezoelectric transducer and a sensing element selective to the measurand of interest. The use of different sensing elements that are usually in a form of thin films allows, in principle, a wide variety of measurands to be detected.

30. Acoustic Wave Bio Sensors • An acoustic wave is transmitted into a gaseous, liquid or solid medium that undergoes changes due to measurands. The changes in the elastic and viscous constants, and the density of a medium due to the measurand cause the change in the velocity, the impedance, and the absorption of the acoustic wave. Examples of such sensors include a bulk acoustic wave immunosensor.

31. Can we some real time application using the Acoustic Bio Sensor ?

32. Acoustic Wave Bio Sensors • Acoustic sensors are often designed as resonant structures of high quality factor, Q in order to obtain high sensor sensitivity and dynamic range. • Two acoustic elements are used in sensor, one as a sensing element and the second as the reference in order to eliminate interfering ambient/experimental conditions such as temperature, mechanical stress or other factors.

33. Acoustic Wave Bio Sensors

34. What are the primary applications of Acoustics Wave Bio Sensor ?

35. Acoustic Wave Bio Sensors • Medical diagnostic, environmental monitoring, biotechnology, and pharmaceutical industry are the primary fields for biosensor applications. • Acoustic biosensors can measure simultaneously acoustic/mechanical and electric/dielectric properties of the measurand is theunique strength of acoustic sensor technology.

36. Acoustic Wave Bio Sensors

37. What do you conclude from this presentation?

38. Acoustic Wave Bio Sensors • Acoustic biosensors can measure simultaneously both the acoustical/mechanical and electrical/dielectric properties of bio environment which very significantly expands their sensing capabilities. • Acoustic waves offer a very promising technology platform for the development of biosensors.

39. Acoustic Wave Bio Sensors • Acoustic Bio Sensors exhibit sensitivity, small size and portability, fast responses, ruggedness and robustness, high accuracy, compatibility with integrated circuit (IC) technology and excellent aging characteristics. • Acoustic wave technology can also be utilized for the development of smart structures in which the combination of the

40. Acoustic Wave Bio Sensors • acoustic actuators and acoustic sensors provides very unique self-controlled and/or self-adaptive features.

41. Acoustic Wave Bio Sensors End of Acoustic Wave Bio Sensor Next: Solenoid Valves -Pavana Rupa Bondili