Nano-Technology Done by Aloysius Zai 3A104 An Ace Project on…
Overview What is nano-technology? How it started: First evidence of nano-technology Methods to harness nano-technology Uses of nano-technology Picture Gallery Personal inputs on nano-technology Bibliography
What is nano-technology? Nanotechnology is the engineering of functional systems at the molecular scale covers both current work and concepts that are more advanced. ‘Nanotechnology' also refers to the projected ability to construct items from the bottom up, using techniques and tools being developed today to make complete, high performance products.
First evidence of nano-technology Evidence from: Physicist Richard Feynman Venue: American Physical Society Event: Speech about this process to manipulate individual molecules and atoms using tools to build a proportionally smaller model of an object.
Methods to harness nano-technology A Bottom up approach DNA Nano-technology [Arranging smaller components to more complex structures] Two ways to harness DNA Nano-tech: 1.Tile-based structures 2.Folding Structures
More about DNA nanotech Tile based Structures Tile-based structures is the idea of creating DNA nano-structures out of smaller, discrete units.
Folding Structures Create 2D DNA structures from a long strand of arbitrary DNA sequence They are then folded into the desired shape of the structure using shorter strands. We can use this method of DNA nano-technology to create 2D “nano-sized” shapes using DNA.
Top-down approaches Nanoelectromechanical Systems To Create smaller devices by using larger ones makes use of the chemical properties of single molecules to cause singular molecular components to self-organise or carry out positional assembly. These two ideas make use of the concept of molecular self-assembly or molecular recognition to create nano-structures.
Uses of nano-technology in our daily life Sunscreens sunscreens contain nanoparticles of zinc oxide or titanium oxide. Older sunscreen formulas use larger particles, which is what gives most sunscreens their white colour. nano particles are less visible when you rub the sunscreen into your skin, it doesn't give you a whitish colour
Clothing Manufacturers Coat fabrics with a thin layer of zinc oxide nanoparticles Able to create clothes that give better protection from UV radiation. Other clothes have nano particles in the form of minute “hair” or “whiskers” Make clothing stain resistant.
Anti bacterial Bandages Use nano particles of silver in the process of manufacturing the bandage Silver ions block microbes' cellular respiration (Silver smothers harmful cells and killthem)
Tennis Nanotube racket made the racket out of carbon nanotube-infused graphite Racket light but VERY powerful VS Nanotube Power racket
Still on tennis, The Brand “Wilson” coated clay nano particles on the inner core of their tennis ball Clay acts as sealant ∴ Air cannot escape
Picture Gallery Nano-technology in cancer treatment
My personal inputs on nano-technology I find that this invention of nano-technology is a great milestone of human inventions and likewise, it is a great milestone for science and technology. Even at this point of time, nano-technology is already harnessed in so many ways so we can imagine that next time, nano-technology will be harnessed in uncountable areas.
(continued) I also find that nano-technology is very useful as we get to build very minute objects such as machines in the medical field such as treating cancer cells et cetera. I believe that the invention of such a technology proves to all of mankind that nothing is impossible with the help of science and technology as we all know that once, people never even bore the slightest thought that creating nano objects was even possible