纳米导论.ppt

Introduction to Nanoscience LECTURE NOTES These will be handed out the week following the lecture – so next week you get copies of these ppt slides. * 1850 1890 1950 2000 Time (years) MECHANICAL AGE Vernier caliper ELECTRO- MECHANICAL AGE Edison and Ford ELECTRONIC AGE Moore’s Law NANO AGE NANO AGE A number of these type of graphs: 10-3 10-4 10-9 10-12 Critical Size Dimension (m) Nano scale (10-9 m) The Nano Age ..enough to make you happy to be alive ! Although the sperm and egg are much larger than nano scale Once intra-cell activity begins it is a nano scale process. This is a platform for nanoscience – to utilise millions of years of evolution. /biology/faculty/Thaler.html Mammalian egg at the point of fertilisation. 50x30um See a whole range of ‘nanobots’, designed for specific tasks. 5-10 nanometers thick Get an idea of scale Do you consider these feasible (possible ?) The Industrial Physicist JUNE/JULY 2002 ? American Institute of Physics ~ 50 x 10-9 meters Artist’s impression of a nano-size molecular assembler Red blood cell ….and these ? ‘Imagination is more important than knowledge’ Albert Einstein. Thinking about objects at the nanoscale is new for most people. A nanometer (10-9 meters, one billionth of a meter) is difficult to mentally perceive. Generally see scales with decreasing size which helps give an idea of the scale. It is also the length your finger nails grow every second or two. Commercial Products. 14mm 12mm The size of Samsung’s new 1 GB fast (7.12MB/sec) flash card. The Best Yet. 1.1mm 1mm The figure below shows major advances in Science and Technology come about twice a century and these lead to massive wealth creation. So still 19 years to go? So how big an impact from the Nano Age According to the above we are still at the ‘Introduction’ stage of the Nano Age and it will be another 75 years before the end of the ‘Rapid Growth Phase’. There are 3 stages DO YOU AGREE THESE ARE ALL MAJOR ADVANCES ? The observation, identification, des