Carbon Nano Tubes - Bio medical applications

BY SIDDHARTH.D.C (1RV09IT043)

DEPT OF INSTRUMENTATION TECHNOLOGY,RVCE

OUTLINEDiagnostic Tools and Devices

Why CNT??

Sensors

Working Principle

References

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.

Why CNT??

Strong like a steel

Light as a aluminum

Elastic like Plastic

Excellent Chemical and thermal Stability

Rich electronic properties

CNT as SensorsSensors 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

CNT SensorsEye Surgery

Inflated mattress

CNT as SensorsBlood pressure monitors

Kidney dialysis

Intelligent portable respiratory devices

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.

Working PrincipleMechanical deformation can

change electronic property of the nanotube

The band gap variation leads to semiconductor-metal-insulator transition as a function of η.

Working Principle

η=0.0 η=0.1

η=0.4

η=0.25

Working Principle

Working Principle

ReferencesConference 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