|
Carbon nanotubes
(cnts) were discovered by Sumio Iijima in 1991. Carbon
nanotubes
are fullerene-related
structures which consist of rolled graphene
sheets. There are two types of CNT: single-walled (one tube) or multi-walled
(more tubes). Both of these are typically a few nanometres
in diameter and several micrometres to centimetres long.
Source
|
|
Carbon nanotubes
(cnts) are allotropes of carbon
with a nanostructure
that can have a length-to-diameter ratio greater than 10,000,000 and as high
as 40,000,000 as of 2004. These cylindrical carbon
molecules have novel properties that make them
potentially useful in many applications
in nanotechnology, electronics,
optics and other fields of materials science, as well as potential
uses in architectural fields. They exhibit extraordinary strength and unique
electrical properties, and are efficient conductors
of heat. Inorganic nanotubes have also been
synthesized.
Source
|
|
Are
cylindrical carbon
molecules with properties that make them
potentially useful in extremely small scale electronic
and mechanical
applications.
They exhibit unusual strength and unique electrical properties, and are
efficient conductors
of heat. Inorganic nanotubes have also been
synthesized.
Source
|
|
A
form of carbon
related to fullerenes,
except that the carbon
atoms form extended hollow tubes instead of closed,
hollow spheres. Carbon
nanotubes
can also form as a series of nested, concentric tubes. Carbon nanotubes
can be used as nanometer-scale
syringe needles for injecting molecules
into cells
and as nanoscale
probes for making fine-scale measurements. Carbon
nanotubes
can be filled and capped, forming nanoscale
test tubes or potential drug delivery devices. Carbon nanotubes
can also be "doped," or modified with small amounts of other
elements, giving them electrical properties that include fully insulating,
semiconducting, and fully conducting.
Source
|
|
A
fullerene having a cylindrical or toroidal
configuration.
Source
|
|
Nanotube consisting of one or several graphene sheets rolled up into a seamless tube,
forming a single- or multi-walled tube
Source
|
|
Nanotube consisting of carbon
Source
|
|
Hollow
nanofibre
Source
|
|
Long,
thin cylinders of carbon,
discovered in 1991 by S. Iijima. These large macromolecules are unique for their size,
shape, and remarkable physical properties. They can be thought of as a sheet
of graphite
(a hexagonal lattice
of carbon) rolled into a cylinder. The physical
properties are still being discovered. Nanotubes
have a very broad range of electronic,
thermal, and structural properties that change depending on the different
kinds of nanotube
(defined by its diameter, length, and chirality,
or twist). To make things more interesting, besides having a single
cylindrical wall (Single Walled Nanotubes
or swnts), nanotubes
can have multiple walls (mwnts)--cylinders inside the other cylinders.
Usually referred to as carbon
nanotubes,
also known as nanorods.
Applications
for carbon
nanotubes
include high-density
data storage, nanoscale
electronics,
and flexible solar cells.
Source
|
|
Long,
thin cylinders of carbon,
discovered in 1991 by S. Iijima. These large macromolecules are unique for their size,
shape, and remarkable physical properties. They can be thought of as a sheet
of graphite
(a hexagonal lattice
of carbon) rolled into a cylinder. The physical
properties are still being discovered. Nanotubes
have a very broad range of electronic,
thermal, and structural properties that change depending on the different
kinds of nanotube
(defined by its diameter, length, and chirality,
or twist). To make things more interesting, besides having a single
cylindrical wall (Single Walled Nanotubes
or swnts), nanotubes
can have multiple walls (mwnts)--cylinders inside the other cylinders.
Sometimes referred to simply as nanotubes.
Source
|
|
A
one dimensional fullerene
(a convex cage of atoms
with only hexagonal and/or pentagonal faces) with a cylindrical shape. Carbon nanotubes
discovered in 1991 by Sumio Iijima resemble rolled up graphite, although they can not really be made that
way. Depending on the direction that the tubes appear to have been rolled
(quantified by the 'chiral vector'), they are known to act as conductors
or semiconductors. Nanotubes
are a proving to be useful as molecular
components for nanotechnology. [Encyclopedia Nanotech] Strictly speaking, any tube with nanoscale dimensions, but generally used to refer
to carbon nanotubes
(a commonly mentioned non-carbon
variety is made of boron nitride), which are sheets of graphite rolled up to make a tube. The dimensions
are variable (down to 0.4 nm in diameter) and you can also get nanotubes within nanotubes,
leading to a distinction between multi-walled and single-walled nanotubes. Apart from remarkable tensile strength, nanotubes exhibit varying electrical properties
(depending on the way the graphite
structure spirals around the tube, and other factors), and can be insulating,
semiconducting or conducting (metallic). [CMP]
Source
|
|
A
one-dimensional fullerene
(a convex cage of atoms
with only hexagonal and/or pentagonal faces) with a cylindrical shape.
Source
|
|
Carbon nanotubes
(cnts) were discovered by Sumio Iijima in 1991. Carbon
nanotubes
are fullerene-related
structures which consist of rolled graphene
sheets. There are two types of CNT: single-walled (one tube) or multi-walled
(more tubes). Both of these are typically a few nanometres
in diameter and several micrometres to centimetres long.
Source
|
|
Cylindrical
tubelike molecule
consisting of graphite
sheets. They are extremely strong materials and have a good thermal conductivity. Carbon nanotubes
are extremely thin (their diameter is about 10,000 times smaller than a human
hair). A single walled nanotube
(SWNT) is composed of one graphite
sheet, a concentrical formation of more than one sheet is named multiwalled nanotube (MWNT).
Source
|
|
Are
cylindrical carbon
molecules with properties that make them
potentially useful in extremely small scale electronic
and mechanical
applications.
They exhibit unusual strength and unique electrical properties, and are
efficient conductors
of heat. Inorganic molecules
have also been synthesized.
Source
|
|
See
our Nanotubes
and Buckyballs
page Copyright Prof. Vincent H. Crespi Department of Physics Pennsylvania State University. And an excellent description of Nanotubes
Source
|
|
See
Nanotubes
Source
|
|
Graphite sheet rolled into a tube
Source
|
|
Graphite sheet rolled into a tube
Source
|
|
Graphite sheet rolled into a tube
Source
|
|
A
one-dimensional fullerene
(a convex cage of atoms
with only hexagonal and/or pentagonal faces) with a cylindrical shape.
Source
|
|
See
Nanotubes
Source
|
|
A
one dimensional fullerene
with a cylindrical shape.
Source
|
|
A
carbon molecule
that resembles a cylinder made out of chicken wire one to two nanometers in diameter by any number of millimeters in length. Accidentally discovered by
a Japanese researcher at NEC in 1990 while making Buckyballs,
they have potential use in many applications.
With a tensile strength 10 times greater than
steel at about one quarter the weight, nanotubes
are considered the strongest material for their weight known to mankind.
Source
|
|
A
cylinder-shaped structure resembling a rolled-up sheet of graphite that can be a conductor
or semiconductor depending on the alignment of
its carbon
atoms. It is 100 times stronger than steel of the same
weight, although due to high fabrication costs, widespread commercial use is
still distant.
Source
|
|
A
fullerene having a cylindrical or toroidal
configuration.
Source
|
|
Carbon nanotubes,
or cnts, are tubes of carbon
atoms less than a nanometer
(one billionth of a meter) in diameter. Cnts possess a combination of unique
properties that make them highly programmable for a variety of purposes,
including flat panel displays. In May 2005 Motorola Labs unveiled the first
working 5-inch color video display prototype based on their proprietary carbon nanotube
technology.
Source
|
|
|
|
