components of biosensors

1. 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.

6. Schematic illustration of a Biosensor
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signal prossing monitoramplificationtransducerbioreceptor

7. 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

8. Types of Biosensors
1. Calorimetric Biosensor
2. Potentiometric Biosensor
3. Amperometric Biosensor
4. Optical Biosensor
5. Piezo-electric Biosensor

9. PIEZO-ELECTRIC BIOSENSORS
• Also called acoustic wave biosensor.
. Their surface is coated with antibodies which
binds to complimentary antigen present in
sample solution .

10. 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.

11. 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

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

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

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

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

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

17. Google smart lens

18. Q sensor

19. Wearable glucose sensor

20. Simband wearable biosensor

21. Wearable biosensor tattoos monitor sweat
to track weight

22. Application of Biosensor

23. THANK YOU