components of biosensors

components of biosensors

1. BIOSENSORS By Parthipan s 2014010015 1

2. What are biosensors? Devices that analyze biological samples to better understand structure and function and for diagnostics Uses for biosensors Molecule analysis (DNA and proteins) Food safety Diagnostics Medical monitoring Detection of biological weapons

3. Dr. Leland Clark Jr “ Father of the biosensor ” History of Biosensors First described in 1962 by Dr. Leland Clark 1969, a sensor was invented to detect urea

4. COMPONENTS OF BIOSENSOR; 4 A biosensor consists of two components : Bioreceptor and Transducer . The bioreceptor is a biomolecule that recognizes the target analyte The transducer converts the recognition event into a measurable signal.

5. Schematic illustration of a Biosensor 6 signal prossing monitor amplification transducer bioreceptor

6. Biosensors Advantages Rapid detection Small volumes of samples needed Can be used by the patient (blood glucose monitor) Disadvantages Cost May require expertise to use Sample collection can be painful

7. Types of Biosensors Calorimetric Biosensor Potentiometric Biosensor Amperometric Biosensor Optical Biosensor Piezo-electric Biosensor

8. Piezo-Electric Biosensors Also called acoustic wave biosensor. . Their surface is coated with antibodies which binds to complimentary antigen present in sample solution .

9. Optical Biosensors Colorimetric for color Measure change in light adsorption Photometric for light intensity Photon output for a luminescent or fluorescent process can be detected with photomultiplier tubes or photodiode systems.

10. AMPERIOMETRIC Biosensors These electrodes functions by the production of a current when potential is applied between two electrodes ,the magnitude of current is being propotional to substrate concenteration

11. Potentiometric Biosensor These biosensors convert biological reactions into electric signals

12. Common biosensors Blood glucose monitors Heart and blood pressure monitors Pacemakers HIV and pregnancy tests

13. Blood glucose monitors Used by diabetics to measure blood glucose concentration Helps patients determine their insulin dose

14. Pregnancy test Detects the hCG protein in urine. Glucose monitoring device (for diabetes patients) Monitors the glucose level in the blood.

15. WEARABLE BIOSENSORS Google smart lens Q sensor Wearable glucose sensor Simband wearable biosensor Wearable biosensor tattoos monitor sweat to track weight

16. Google smart lens

17. Q sensor

18. Wearable glucose sensor

19. Simband wearable biosensor

20. Wearable biosensor tattoos monitor sweat to track weight

21. Application of Biosensor

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