This document discusses nanosensors, which are sensors operating on the atomic and molecular scale. They are smaller, lighter, and have modest power requirements. The document outlines possibilities for nanosensor technology such as using silver/gold nanoparticles and carbon nanotubes. It describes potential medical applications including nanorobots to monitor internal body states. Other applications discussed include physical, chemical, and biosensors. Challenges mentioned are design problems, flow control, risks, economics, and reducing costs and improving reliability.

1. Nanosensors
Vijay Rajesh Ammanamanchi

2. Outline
 Introduction
 Possibilities
 Nanosensor Technology
 Applications
 Realities
 Conclusion

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

4. Possibilities
 Silver and gold
nanoparticles
 CNT
 Computational
Design

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

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

7. 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

8. Applications
 Physical Sensors
World’s smallest
balance

9. Contd..
 Chemical sensors
Ionization detector
Wireless sensor
network

10. Contd..
 Biosensors
Detection of
complex molecules

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

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

13. Enhanced resolution scanning

14. Realities
 Usual design problems
 Flow control
 Risk and Economics

15. 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.

16. References
 http://sensorsmag.com/articles/article_index/
 http://www.nanosensors.com/supersharpsiliconsensors.h
 http://www.nature.com/nature/links/030710/030710-
7.html
 http://www.nanomedicine.com/NMI/
 http://physicsweb.org/article/news/7/10/7
 http://www.foresight.org/Conferences/MNT05/Abstrac
ts/Brenabst.html
 http://www.news-gazette.com/story.cfm?
Number=14625