Carbon nanotubes (CNTs) are an allotrope of carbon.
They take the form of cylindrical carbon molecules and have novel properties that make them potentially useful in a wide variety of applications in nanotechnology, electronics, optics and other fields of materials science.
They exhibit extraordinary strength and unique electrical properties, and are efficient conductors of heat.
Inorganic nanotubes have also been synthesized.
Nanotubes are members of the fullerene structural family, which also includes buckyballs.
Whereas buckyballs are spherical in shape, a nanotube is cylindrical, with at least one end typically capped with a hemisphere of the buckyball structure.
Their name is derived from their size, since the diameter of a nanotube is on the order of a few nanometers (approximately 50,000 times smaller than the width of a human hair), while they can be up to several millimeters in length.
There are two main types of nanotubes: single-walled nanotubes (SWNTs) and multi-walled nanotubes (MWNTs).
Nanowire A nanowire is a wire of dimensions of the order of a nanometer (10−9 meters). Alternatively, nanowires can be defined as structures that have a ... >
read more
Fullerene The fullerenes, discovered in 1985 by researchers at Rice University, are a family of carbon allotropes named after Buckminster Fuller. They are ... >
read more
Carbon Carbon is a chemical element in the periodic table that has the symbol C and atomic number 6. Carbon occurs in all organic life and is the basis of ... >
read more
Tensile strength Tensile strength measures the force required to pull something such as rope, wire, or a structural beam to the point where it breaks. The tensile ... >
read more
Chemical bond A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through sharing, as well ... >
read more
Nanoparticle A nanoparticle (or nanopowder or nanocluster or nanocrystal) is a microscopic particle with at least one dimension less than 100 nm. Nanoparticle ... >
read more
Space elevator A space elevator is a theoretical structure designed to transport material from a planet's surface into space. Many different types of space ... >
read more
Quantum dot A quantum dot is a semiconductor nanostructure that confines the motion of conduction band electrons, valence band holes, or excitons (bound pairs of ... >
read more
Nanomedicine Nanomedicine is the medical application of nanotechnology and related research. It covers areas such as nanoparticle drug delivery and possible ... >
read more
Molecule In general, a molecule is the smallest particle of a pure chemical substance that still retains its composition and chemical properties. In chemistry ... >
read more