Nanosensors Vijay Rajesh Ammanamanchi

Outline Introduction Possibilities Nanosensor Technology Applications Realities Conclusion

Introduction Sensors operating on the scale of atoms and molecules Smaller size, lower weight, modest power requirements Data storage systems

Possibilities Silver and gold nanoparticles CNT Computational Design

Nanosensor Technology Medical Nanorobots Three operation levels 1. Internal nanorobot states 2.Local and global somatic states 3.Extra somatic states

Contd.. Communications Requirements Coordinate complex, large scale cooperative activities Pass along relevant sensory, messaging, navigational, and other operational data Monitor collective task progress

Contd.. Outmessaging to Patient or User Generating an artificial sensory stimulus Direct stimulation of the receptor in the absence of actual sensory stimulus Triggering artificial action potential in the afferent nerves that carry information from the sensor to the CNS

Applications Physical Sensors World’s smallest balance

Contd.. Chemical sensors Ionization detector Wireless sensor network

Contd.. Biosensors Detection of complex molecules

Contd.. Deployable Nanosensors SnifferSTAR a light- weight portable chemical detection system

Contd.. Nanonose Nanothermometer NanoParticles spy on molecular binding Gas sensors Detection of heavy metal ions with a nanocontact sensor

Enhanced resolution scanning

Realities Usual design problems Flow control Risk and Economics

Conclusions The proposed nanotechnology could allow the development of a new generation of integrated self contained nanofunctional devices incorporating multiple end-point sensing elements,optical quantum detectors and integrated electro-optic molecular switching capability. The obvious challenges are reducing the cost of materials and devices, improving reliability and packing the devices into useful products.

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