Nano propeller
Link here. *Watch the video that is linked right under the second paragraph*
Ambarish Ghosh and Peer Fischer are researchers at the University of Harvard who have designed a nanopropeller. This nanopropeller is 2 microns long and 200-300 nm wide, making it about the size of a bacterial cell. It is made out of glass and is shaped like a corkscrew. This glass is then magnetized so that the propeller can be controlled by the researchers. Some nanopropellers have been made before but this is the first one that can be completely controlled and manipulated while it is in solution. The control system is so sensitive that the researchers were able to trace the letters "R @ H" to represent Rowland at Harvard in a window that's width is less than the width of a human hair. The researchers are also able to control two of the propellers simultaneously. One nanopropeller can move an object that is 1000 times bigger than the propeller itself with ease.
You can make hundreds of millions of nanopropellers in a square centimeter. The nanopropellers are made by exposing a silicon wafer to silicon dioxide vapor. the wafer is slowly spun as the vapor solidifies to create the corkscrew and then the nanopropellers are shaken off the wafer, sprayed with cobalt, and magnetized. The cobalt only goes on one side of the propeller so it creates the perfect handle for controlling their movement.
In order to control the propellers, they are placed in a solution that is surrounded by 3 magnetic coils, one on each axis. This gives the researchers precise control over the actions and movements of the nanopropellers. The propellers can move at a speed of 40 microns per second, about the average speed of a bacteria. It isn't any faster than that because when you get down to such a small level, moving through water becomes more viscous due to the surface area to volume ratio so the propeller has to drill through the water solution in order to move.
I choose this article because it can have many effects on future nano robot technology and it can help with drug delivery and microsurgery one day.
Ambarish Ghosh and Peer Fischer are researchers at the University of Harvard who have designed a nanopropeller. This nanopropeller is 2 microns long and 200-300 nm wide, making it about the size of a bacterial cell. It is made out of glass and is shaped like a corkscrew. This glass is then magnetized so that the propeller can be controlled by the researchers. Some nanopropellers have been made before but this is the first one that can be completely controlled and manipulated while it is in solution. The control system is so sensitive that the researchers were able to trace the letters "R @ H" to represent Rowland at Harvard in a window that's width is less than the width of a human hair. The researchers are also able to control two of the propellers simultaneously. One nanopropeller can move an object that is 1000 times bigger than the propeller itself with ease.
You can make hundreds of millions of nanopropellers in a square centimeter. The nanopropellers are made by exposing a silicon wafer to silicon dioxide vapor. the wafer is slowly spun as the vapor solidifies to create the corkscrew and then the nanopropellers are shaken off the wafer, sprayed with cobalt, and magnetized. The cobalt only goes on one side of the propeller so it creates the perfect handle for controlling their movement.
In order to control the propellers, they are placed in a solution that is surrounded by 3 magnetic coils, one on each axis. This gives the researchers precise control over the actions and movements of the nanopropellers. The propellers can move at a speed of 40 microns per second, about the average speed of a bacteria. It isn't any faster than that because when you get down to such a small level, moving through water becomes more viscous due to the surface area to volume ratio so the propeller has to drill through the water solution in order to move.
I choose this article because it can have many effects on future nano robot technology and it can help with drug delivery and microsurgery one day.
posted by Unknown at 11:33 AM
0 Comments:
Post a Comment
<< Home