1. Carbon Nano Tubes
- Bio medical applications
BY
SIDDHARTH.D.C
(1RV09IT043)
DEPT OF INSTRUMENTATION TECHNOLOGY,RVCE

2. OUTLINE
 Diagnostic Tools and Devices
 Why CNT??
 Sensors
 Working Principle
 References

3. Diagnostic Tools and Devices
 Medical equipment is designed to aid in the
diagnosis, monitoring or treatment of medical
conditions.
 Diagnostic Medical Equipment helps analyse
blood sugar , blood pressure, urine .
 Life support equipment is used to maintain a
patient's bodily function. This includes medical
ventilators, anaesthetic machines, heart-lung
machines and dialysis machines.

4. Why CNT??
 Strong like a steel
 Light as a aluminum
 Elastic like Plastic
 Excellent Chemical and thermal Stability
 Rich electronic properties

5. CNT as Sensors
 Sensors are devices that detect a change in
physical quantity or event.
 Silicon pizoresistors have the disadvantage
that their resistance is highly sensitive to
variations in temperature
 CNT as pizoresistive sensors has
temperature coefficient almost two orders of
magnitude lower than that of silicon

6. CNT Sensors
 Eye Surgery
 Inflated mattress

7. CNT as Sensors
 Blood pressure monitors
 Kidney dialysis
 Intelligent portable respiratory devices

8. Working Principle
 When CNT is pressed the nanotube
experiences several mechanical deformations
at the same time
 A deformation parameter η is defined as η =
(D0-d)/D0, where D0 is the original diameter
of the nanotube, and d is the smallest
diameter of the flattened cross section.

9. Working Principle
 Mechanical deformation can change
electronic property of the nanotube
 The band gap variation leads to
semiconductor-metal-insulator transition as a
function of η.

10. Working Principle
η=0.0 η=0.1
η=0.25 η=0.4

11. Working Principle

12. Working Principle

13. References
 Conference Paper for the 3rd International
Workshop on Structural Health Monitoring-
Shu Peng, James O'Keeffe, Chengyu Wei, K.
Cho
 Carbon Nanotubes for Biomedical
Applications-John T.-W.Yeow, Member, IEEE