What are the different types of carbon nanotubes?
There are two basic types of carbon nanotubes (CNT)-a single-walled nanotrubice (SWDT) and multibod nanotubes-but the arrangement of atoms groups in these structures is also changing. Carbon nanotubes are essentially inverted graphite leaves, which are built on a series of mutual, six-leaf atomic bonds. These bonds can be arranged in one of the three configurations: Kandat, where they alternate in a linear pattern along the length of the cylindrical nanotuber; A chair where the structure is a collection of direct link lines; and chiral, where linear bonds are caused to left or right angles along the length of the tube.
In this basic class structures, carbon nanotubes also differ in that they are straight cylinders or distorted in some way, such as curled or branched. Other forms created include nanotubes with a sphere of carbon buckyball, known as Nanobud, and nanotubes with cups, which are a series of concave structures in the form of disks aligned in the form of a tube. Were also madeENY structures of torus or donuts and have high magnetic torque properties that would make them useful as powerful sensors.
The structure of carbon nanotubes also determines their physical and chemical properties, where the nanotubes of the armchair are always metal in terms of electrical conductivity and zigzag and chiral forms are semiconductive. Six carbon bonds, which form the basic hexagonal structure of carbon nanotubes, are located around 0.14 nanometers apart in strong molecular covalent bonds. These rolled graphite leaves are then bound to each other in multi -walled nanotubes, which are essentially rollers inside the cylinders, weak van der Waals strength, at a distance of about 0.34 nanometers between cylinder walls. This weak molecular bond allows the structures of graphite sheets to slip against each other, which makes it easier to wipe graphite in applications like when pencil is pressedon paper.
other types of carbon nanotubes include extreme carbon nanotubes, which are simply changes in natural design, where they are very long, short or thin. They have 20 to 100 times stronger than steel for such things such as space lift, and for artificial muscles that can operate in the temperature range of -321 ° to 2,800 ° Fahrenheit (-196 ° to 1,538 ° Celsius). Some extreme nanotubes are also able to capture infrared wavelengths of light known as radiation of the black body or thermal radiation. As a result, they would be useful in solar cells that could capture this heat of the emitted country at night, allowing continuous energy production at the efficiency level of more than 35%, twice to five times better than conventional solar cells.