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Nanotechnology Power Point 1

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Nanotechnology Power Point 1

  1. 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.
  2. 2. <ul><li>Information Technology </li></ul><ul><li>Materials and Manufacturing </li></ul><ul><li>Health and Medicine </li></ul><ul><li>Energy and Environment </li></ul><ul><li>Transportation </li></ul><ul><li>Defense </li></ul><ul><li>Space exploration </li></ul>Nanotechnology is an enabling technology
  3. 3. Examples of Nanomaterials Carbon Nanotubes Zinc Oxide Copper Oxide Aluminium Silver
  4. 4. Why Nanotechnology? <ul><li>Fundamentally new properties </li></ul><ul><li>Nanophase copper is five times stronger than the ordinary metals </li></ul><ul><li>Nanophase ceramics are highly resisting to breaking </li></ul><ul><li>Exciting new materials </li></ul><ul><li>Carbon nanotubes are fantastic conductors </li></ul><ul><li>Strange and Fancy Size Dependent </li></ul><ul><li>Behavior!!! </li></ul><ul><li>Nanoparticles of Gold are pink in color </li></ul>
  5. 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. 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
  7. 7. <ul><li>The strongest and most flexible molecular material because of C-C covalent bonding </li></ul><ul><li>Young’s modulus of over 1 TPa vs. </li></ul><ul><li>70 GPa for Aluminum, 700 GPA for C-fiber </li></ul><ul><li>Maximum strain ~10% much </li></ul><ul><li>higher than any material </li></ul>Carbon Nanaotubes Properties
  8. 8. <ul><li>Diodes and transistors for </li></ul><ul><li>Computing </li></ul><ul><li>Capacitors </li></ul><ul><li>Data Storage </li></ul><ul><li>Field emitters for instrumentation </li></ul><ul><li>Flat panel displays </li></ul>CNT Application: Electronics
  9. 9. <ul><li>CNT based microscopy: AFM, STM… </li></ul><ul><li>Nanotube sensors: force, pressure, chemical… </li></ul><ul><li>Biosensors </li></ul><ul><li>Molecular gears, motors </li></ul><ul><li>Batteries, Fuel Cells: H 2 , Li storage </li></ul><ul><li>Biomedical </li></ul><ul><li>- Drug delivery </li></ul><ul><li>- DNA sequencing </li></ul><ul><li>- Artificial muscles, bone replacement, </li></ul><ul><li>bionic eye, ear... </li></ul>Carbon nanotubes Application: Sensors, Bio Conventional silicon or tungsten tips wear out quickly. CNT tip is robust, offers amazing resolution.
  10. 10. CNT Interconnects <ul><li>CNT advantages: </li></ul><ul><li>Small diameter </li></ul><ul><li>Highly conductive along the axis </li></ul><ul><li>High mechanical strength </li></ul>
  11. 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. 12. Zinc Oxide Nanowires
  13. 13. Nanolasers <ul><li>. </li></ul>Light emission from a semiconductor nanowire-typically 10-100 nanometers wide and a few micrometers long-functions as a laser. Lasers made from arrays of these wires have many potential applications in communications and sensing
  14. 14. Examples of Nanomaterials <ul><li>Inorganic nanowires </li></ul><ul><li>Protein nanotubes </li></ul><ul><li>Nano in gene sequencing </li></ul><ul><li>Carbon Nanotubes </li></ul><ul><li>- CNT based nanoelectronics </li></ul><ul><li> - CNT based microscopy </li></ul><ul><li> - CNT interconnects </li></ul><ul><li> - CNT based biosensors </li></ul><ul><li> - CNT chemical sensors </li></ul>

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