Since the discovery of carbon nanotubes cnts in 1991 by iijima, a whole new discipline in. Cryogenic grinding seminar and ppt with pdf report. When compared to copper wires, which are commonly used as thermal conductors, the carbon nanotubes can transmit over 15 times the amount of watts per meter per kelvin. Global carbon nanotubes market 2 carbon nanotubes are a form of carbon molecules that exist in the form of a tube like structure. Carbon nanotube seminar ppt with pdf report study mafia. Synthesis, integration, and properties hongjie dai department of chemistry, stanford university, stanford, california 94305 received january 23, 2002 abstract synthesis of carbon nanotubes by chemical vapor deposition over patterned catalyst arrays leads to nanotubes grown from specific sites on surfaces. Carbon nanotubes seminar report by shuhabutariq 1si03ec109. The curved ends of the nanotube contain pentagons, the walls are the normal hexagonal structure. If you continue browsing the site, you agree to the use of cookies on this website. Carbon nanotubes properties and applications slideshare. Carbon nanotube flow sensors seminar report, ppt, pdf for.
Oct 20, 2016 because of this, carbon nanotubes have been shown to be very good thermal conductors. Drug delivery formulations involve low cost research compared that for discovery. Carbon nanotubes are adept at entering the nuclei of cells and may. Interesting graphene powerpoint presentation illustrates the carbon nanotubes, graphenes properties and applications. Carbon nanotubes properties and applications cheap tubes. Carbon nanotubes cnts are cylindrical molecules that consist of rolledup sheets of singlelayer carbon atoms graphene. This is a short presentation on carbon nanotubes,their types, synthesis, and applications. Bullet proof jackets are formed by the carbon nano fibers which are. Please also visit our carbon nanotubes properties and applications guide here. Introduction to carbon nanotubes carbon nanotubes were discovered in 1991 by sumio iijima of nec and are effectively long, thin cylinders of graphite, which you will be familiar with as the material in a pencil or as the basis of some lubricants.
In simple words the carbon nanotubes have the hexagonal cells lattice rolled onto itself with the diameters in the order of nanometers and length in the order of several micrometers. A carbon nanotube is a tubeshaped material, made of carbon, having a diameter measuring on the nanometer scale. Since carbon nanotubes are currently an area of active research the books on the subject tend to be aimed at a research audience. There are numerous carbon nanotubes properties and applications which take full advantage of cnts aspect ratio, mechanical strength, electrical and thermal conductivity. By oxidation we can partially purify cnts from impurities time and temperature of exposure of the process are very important. Among all the nanomaterials, a material by name carbon nanotubes has led the way in terms of its captivating structure and also its ability to furnish specific applications ranging from the electronics to the energy. Carbon nanotubes history and production methods cheap tubes. A free powerpoint ppt presentation displayed as a flash slide show on id. Water molecules pass through the smoother walls of carbon nanotubes more easily than through other types of nanopores, which requires less power. Graphene ppt powerpoint presentation carbon nanotubes. Types of nanotubes carbon nanotubes are basically sheets of graphite rolled up into a tube as shown in this figure. Carbon nanotubes are allotropes of carbon with a cylindrical nano structure. Hence, the hexagonal two dimensional lattice of graphite is mapped on a onedimensional cylinder of radius r with various helicities characterized by. Chemical vapor deposition after energy transfer, the carbon molecule binds to the substrate temperature between 0.
Applications an important issue in intracellular drug delivery is the poor. They can be singlewalled swcnt with a diameter of less than 1 nanometer nm or multiwalled mwcnt, consisting of several concentrically interlinked nanotubes, with. Carbon nanotubes are currently being investigated for possible thermionic applications due to their potentially low work function which can be chemically modified, their ability to be produced in aligned arrays, and their nanoscale tip geometry based on their diameters. Ability to generate heat energy by carbon nanotubes is exploited to be used in cancer therapy 2630. The effect of carbon nanotubes at low concentrations on the fracture properties, nanoscale properties and microstructure of the nanocomposite materials was studied. In continuation of the previous work, this article addresses the key issues on hand in carbon nanotube technology. Carbon nanotubes easily penetrate through the cells because of its needle shape 2123. Types, methods of preparation and applications parijat pandey, mandeep dahiya department of pharmaceutical sciences, maharshi dayanan d university, rohtak, har yana, india. Carbon nanotubes list of high impact articles ppts. Carbon nanotubes presentation for 2010 ct expo slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The study and manipulation of materials at the nanoscale.
The shortest carbon nanotube can be considered to be the organic compound cycloparaphenylene, which was synthesized in 2008. Introduction types properties production applications conclusion references. Synthesis of carbon nanotubes fb physik, fu berlin. Carbon nanotubes seminar report by shuhabutariq 1si03ec109 5 nanotubes are cylindrical fullerenes. Powerpoint is the worlds most popular presentation software which can let you create professional seminar on nanotechnology powerpoint presentation easily and in no time. Example bullet point slide carbon nanotubes are fullerenerelated. Scribd is the worlds largest social reading and publishing site.
In the article carbon nanotubes, the synthesis, structure, properties, and potential applications of multiwalled and singlewalled variants of carbon were discussed extensively. These nanotubes were grown on silicon substrates using an improved chemical vapor deposition cvd method and represent electrically uniform arrays of singlewalled carbon nanotubes. Carbon nanotubes are remarkable objects that look set to revolutionize the technological landscape in the near future. A power point presentations on carbon nanotubes particularly its properties. Carbon nanotubes show a unique combination of stiffness, strength, and tenacity compared to other fiber materials which usually lack one or more of these properties. Singlewalled carbon nanotubes 205 dices determine whether a swnt will be a metal or a semiconductor. Tensile strength is a measure of the amount of force an object can withstand without tearing apart.
To initiate the growth of nanotubes, two gases are bled into the reactor. They can be thought of as a sheet of graphite a hexagonal lattice of carbon rolled into a cylinder. A nanoradio is a carbon nanotube anchored to an electrode, with a second electrode just beyond its free end. Cnt are of high technological interest because they can be produced or refined to possess specific properties such as high. Carbon nanotubes are being developed to clean up oil spill. Reactivity as particles get smaller they tend to react. Common carbon gases methane carbon monoxide acetylene 11. F carbon nanotubes stick to each other due to vander walls force.
These are large macromolecules that are unique for their size, shape, and remarkable physical properties. Advancement in carbon nanotube authorstream presentation. Carbon nanotubes have many structures, differing in length, thickness, and in the type of helicity and number of layers. The presentation must be downloaded, since there are powerpoint effects. Introduction carbon nanostructures like fullerenes, graphene and nanotubes are of great interest for the current research as well as for future industrial applications. Carbon nanotubes can be used as the pores in membranes to run reverse osmosis desalination plants. Download as ppt, pdf, txt or read online from scribd.
One of the main applications of carbon nanotubes is super strong bullet proof jackets. Ppt carbon nanotubes powerpoint presentation free to. The spatial position of a solubilized drug in a micelle will depend on its. Would be expensive to implement this new technology in and replace the older technology in all the places that we could. Carbon nanotubes as new promising materials in water treatment. For those of you who would like to read more about carbon nanotubes i can recommend two books. Nanotubes were observed in 1991 in the carbon soot of graphite electrodes during an arc discharge, by using a current of 100 amps, that was intended to produce fullerenes.
Carbon nanotubes are long hollow structures and have mechanical, electrical, thermal, optical and chemical properties and these nanotubes are constructed with length to diameter ratio of 2,000,000. Carbon nanotubes what they are, how they are made, what. Collins university of california at irvine, irvine, usa 1. They have incredible physical and electronic properties, which has made them the subject of much research in academia and industry in recent years. However the first macroscopic production of carbon nanotubes was made in 1992 by two researchers at necs fundamental research laboratory. Jun 21, 2012 carbon nanotubes are molecular tubes formed from rolledup sheets of graphene. At the nanoscale, strange things happen to materials their properties can change. The types of carbon nanotubes are typically referred to as single walled carbon nanotubes and multi walled carbon nanotubes. Carbon nanotubes definition structure classification properties applications drawbacks conclusion definition. Nanotubes have been constructed with lengthtodiameter ratio of up to 2,000,000. One property of nanotubes is that theyre really, really strong. All carbon nanotubes involve a hexagonal aromatic rings all t i i l t iti t t th d h t lall atoms are in equivalent positions except at the ends where pentagonal rings are required. Because of this, carbon nanotubes have been shown to be very good thermal conductors. Jun 17, 2004 the special nature of carbon combines with the molecular perfection of buckytubes singlewall carbon nanotubes to endow them with exceptionally high material properties such as electrical and thermal conductivity, strength, stiffness, and toughness.
The thermal conductivity of carbon nanotubes is dependent on the temperature of the tubes. Carbon nanotubes applications of carbon nanotubes buckytubes. Tomorrows society will be shaped by nanotube applications, just as siliconbased technologies dominate society today. Among all the nanomaterials, a material by name carbon nanotubes has led the way in terms of its captivating structure and also its ability to furnish specific applications. Structure of carbon nanotube one type of carbon nanotube has a cylindrical shape with open ends. Carbon nanotubes are molecular tubes formed from rolledup sheets of graphene. Binding sites for a carbon nanotube are preferentially defined at the ends of the tube on the pentagonal ring. Presentations ppt, key, pdf logging in or signing up. When a voltage is applied between the electrodes, electrons flow from a battery through the nanotube, jumping off its tip to the positive electrode. Although they are formed from essentially the same graphite sheet, their electrical characteristics differ depending on these variations, acting either as metals or as semiconductors. These tubes of carbon are usually only a few nanometres wide, but they can range from less than a micrometre to several millimetres in length.
These nanotubes have enhanced set of characteristics that make them stronger than steel, with a large reduction of weight. In this study, the development of cementitious nanocomposites reinforced with multiwall carbon nanotubes mwcnts at watercement ratios of 0. This helps you give your presentation on seminar on nanotechnology in a conference, a school lecture, a business proposal, in a webinar and business and professional representations. Carbon nanotubes cnt belong to a large group of hollow fiberlike carbonbased nanomaterials with diameters mostly below 100 nm and very high aspect ratios. Introduction and outline the presence of defects subtly alters all of a materials properties. A nanometer is onebillionth of a meter, or about one tenthousandth of the thickness of a human hair. They are allotropes of carbon with a cylindrical nanostructure. Graphite is made up of layers of carbon atoms arranged in a hexagonal lattice, like chicken wire see.
They can be singlewalled swcnt with a diameter of less than 1 nanometer nm or multiwalled mwcnt, consisting of several concentrically interlinked nanotubes, with diameters reaching more than 100 nm. The nanotechnology has a great potential to transform society and the molecular nanotechnology or nanotechnology is a unique type of manufacturing applied science, with the aid of this technology we can build the things from the atom up and can rearrange the matter with atomic accuracy. Jivraj mehta institute of technology, mogar, anand 2. Carbon nanotube flow sensors seminar report, ppt, pdf. Carbon nanotubes carbon nanotubes, long, thin cylinders of carbon, were discovered in 1991 by sumio iijima. Optical properties of carbon nanotubes carbon nanotubes are hollow tubes made entirely from carbon with diameters in the nanometer range such as the one shown in the picture below. Also explore the seminar topics paper on carbon nanotube flow sensors with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year electronics and telecommunication engineering or ece students for the year 2015 2016. Nanotubes are promising candidates for nanoscale lightemitters and many other optical applications, especially in the infrared wavelength. Over the past many decades there has been a sudden growth in the field of research and advancement related to the nanomaterials. Types, methods of preparation and applications parijat pandey, mandeep dahiya department of pharmaceutical sciences, maharshi dayanan d university, rohtak, har. The graphite layer appears somewhat like a rolledup chicken wire with a continuous unbroken hexagonal mesh and carbon molecules at the apexes of the hexagons.
Graphene in graphite, each carbon atom is linked to three other carbon atoms through covalent bonds forming hexagonal rings connected to each other to form plane sheets known as graphene. Carbon nanotubes are widely evaluated to be used in the treatment of neurological disorders 24,25. Explore carbon nanotube flow sensors with free download of seminar report and ppt in pdf and doc format. Physical properties of carbon nanotubes by saito, dresselhaus and dresselhaus imperial college press, 1998. Excerpted from nanotechnology for dummies by richard booker and earl boysen.
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