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Essays on carbon nanotubes
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What are Carbon Nanotubes? Carbon Nanotubes are different structural modifications of carbon. They are also cylindrical carbon molecules that have interesting properties that make them potentially very useful in many applications over many fields industry such as nanotechnology, semiconductor, optics and many other fields of materials science, as well uses in architectural area. They can exhibit extraordinary strength and amazing electrical properties, and are efficient conductors of electric current and heat. Their final usage, might may be limiting from their unknown toxicity.
There many different type of Carbon Nanotube. However there are 2 very important types of carbon nanotube. There need to be a clear picture so that Single-walled (SWCNT) can be distinguished from multi-walled (MWCNT) easily. It is pretty straight forward that the formation of SWCNTs was first reported in the June 17th issue of NATURE in 1993 by two papers released differently, one of them by Iijima and Ichihashi and the other done by Bethune (From IBM, California)
There are many way Carbon Nanotubes can be s...
In the novel, Prey, written by Michael Crichton it pertains to the subject of nanotechnology throughout the whole entire book. The main characters of this novel are the
Nanotechnology is defined as the science of design, synthesis and characterization of matter at the nanoscale, which mesures one billionth of the meter [1,2] On that scale, structures exhibit novel chemical, physical and biological properties and processes, which enables the creation of engineered nanomaterials (ENMs), with various characteristics and potential applications. [3] It’s not just that though. Nanotechnology shows the ability to eliminate the gaps among medicine, material engineering and science, computer technology and public policy, creating new clinical and medical approaches to better diagnose, treat and prevent any kind of illness. In fact, it is already moving from simple passive structures
early 1990’s, no such material was known. In 1991, carbon nanotubes were discovered. Although not
Roberts, A. (2011, March). Nanotechnology: The incredible invisible world, Technology & Engineering Teacher, 70 (6) p10-17
The first available purification method for C60 fullerene was by HPLC (High performance liquid chromatography) from which small amounts could be generated at large expense. #Properties of Fullerene (1) fullerene is stable but not totally unreactive (2) fullerene can trap other atoms inside them to form inclusion compounds known as endohedral fullerenes e.g. the egg-shaped fullerene Tb3NaC84. (3) fullerene is sparingly soluble in many solvents e.g. toluene (4) some fullerenes are inherently chiral (5) They tend to react as electrophiles (6) fullerene can be found in soot, interstellar dust and geological formations on the earth.
All forms of carbon can be represented by graphene. Graphite is stacked graphene. Buckyballs (carbon spheres) are just bent graphene. Even the famous carbon nanotubes can be made by rolling graphene into a cylinder (Berger). Basically, no known material compares to graphene. “Graphene has a high specific surface area (2630 square meters per gram), exceptional electrical conductivity (mobility of charge carriers at 200,000 square centimeters per Volt-second), great thermal conductivity (5000 watts per Kelvin-meter), and awesome mechanical strength (Young’s modulus 1100 Gigapascals)” (Shen et al). Graphene conducts heat better than any material, even metal or diamond....
22. Rao, C. emsp14N emsp14R, et al. "Graphene: The New Two‐Dimensional Nanomaterial." Angewandte Chemie International Edition 48.42 (2009): 7752-7777.
Carbon Nanotubes could make t-shirts bulletproof. Retrieved March 11, 2014, from Nano Werk: http://nanowerk.com/spotlight/spotids1054.php. Fecht, S. (n.d.). Lighter, stronger bulletproof clothing. Retrieved April 8, 2014, from Popular Mechanics: http://popularmechanics.com/science/health/med-tech/6spidersilksuperpowers.htm.
Liao, K., Ting, J. (2006). Characteristics of aligned carbon nanotubes synthesized usin a high-rate low-temperature process. Diamond and Related Materials, 2006, 1210-1216.
Fullerenes are accepted as the fourth for of solid carbon after amorphous, graphite and diamond forms. Fullerene chemistry has provided a new dimension of aromatic and a new platform for discussion of mathematical techniques pertinent to large cages. They are basically, large carbon cage molecules. These fullerenes have attracted great interest a large number of physical and chemical properties. These properties of nanostructures strongly depend on this size, shape and chemical compositions. This property leads to very interesting and recent applications in medicinal chemistry, material science and nanotechnology. Functionalization, intercalation and doping by the addition of electron acceptors or donors are the way of modifying the properties of these nanostructures. Among these nanostructures carbon based nanomaterials such as nanotubes, nanocages, nanoshells,
Nanotechnology, shortened to "nanotech", is the study of the control of matter on an atomic and molecular scale. Nano science and nanotechnology are recent, revolutionary development in Science and Engineering that are evolving at a very fast pace.[1,2] It is driven by the desire to fabricate materials with novel and improved properties that is likely to impact virtually all areas of the physical and chemical sciences, biological sciences and health sciences. The word ‘nano’ derives from the Greek word ‘nanos’, which means dwarf or extremely small and mathematically, a nanometer is a billionth of a meter or 10-9 m. Particles whose sizes fall in the size range of 1-100 nm is called a nano particles, whether it is dispersed in gaseous, liquid or solid medium. Generally nanotechnology deals with structures of the size 100 nanometers or smaller, and involves developing materials or devices within that size. Nanotechnology is very diverse, ranging from extensions of conventional device physics, to completely new approaches based upon molecular self-assembly, to developing new materials wi...
Carbon Carbon is one of the basic elements of matter (Bush 1230-1231). The name carbon comes from the Latin word "carbo" meaning charcoal. Carbon is the sixth most abundant element (Gangson). More than 1,000,000 compounds are made from carbon (Carbon (C)). "The Element Carbon is defined as a naturally abundant non-metallic element that occurs in many inorganic and in all organic compounds, exists freely as graphite and diamond and as a constituent of coal, limestone, and petroleum, and is capable of chemical self-bonding to form an enormous number of chemically, biologically, and commercially important molecules.
American Chemical Society. "Carbon nanotubes twice as strong as once thought." ScienceDaily, 16 Sep. 2010. Web. 5 Dec. 2013.
I have chosen nanotechnology as my topic area of choice from the food innovation module.
Graphite is another form of carbon. It occurs as a mineral in nature, but it can be made artificially from amorphous carbon. One of the main uses for graphite is for its lubricating qualities. Another is for the "lead" in pencils. Graphite is used as a heat resistant material and an electricity conductor. It is also used in nuclear reactors as a lubricator (Kinoshita 119-127).