1. Nanotechnology Why Nanotechnology? ULTRASMALL (miniaturized) sensors, communication and navigation systems with very LOW MASS , VOLUME and POWER COMSUMPTION are NEEDED . A nano meter is one-billionth or of a meter. Nanotechnology is the DESIGN, FABRICATION , and UTILIZATION of MATERIALS, STRUCTURES and DEVICES which are less than 100 nm. For comparison, 10 nanometers is 1000 times smaller than the diameter of a human hair.

3. Examples of Nanomaterials Carbon Nanotubes Zinc Oxide Copper Oxide Aluminium Silver

5. Carbon Nanotubes - CNT SEM images. Diameter range: 5nm - 15 nm Carbon nanotubes are molecular-scale tubes of graphitic carbon. Their name is derived from their size, since the diameter of a nanotube is on the order of a few nanometers while they can be up to several millimeters in length .

6. Carbon Nanotubes Properties Everything changes at nanometer scale! Physical properties Applications Mechanical strength, toughness Chemical bonding, reactivity Thermal insulators, conductors Electrical conductivity Optical absorption, reflectivity high strength low weight composites chemical and biological sensors and receptors high power or high temperature application Microelectronics high bandwidth fibers or waveguides

11. 3+ 2+ e 3+ 2+ CNT DNA Sensor Using Electrochemical Detection Carbon nanotube array electrode functionalized with DNA/PNA probe as an ultrasensitive sensor for detecting the hybridization of target DNA/RNA from the sample.

12. Zinc Oxide Nanowires