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. These are large macromolecules that are unique for their size, shape, and remarkable physical properties. Nanotechnologyseminar pptslidesreporttopicspdfdocfree. By separating the contact and applying a dc arc discharge between two pure carbon rods, the evaporation of the anode carbon realized the. 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. 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. Carbon nanotubes seminar report by shuhabutariq 1si03ec109 5 nanotubes are cylindrical fullerenes. Ppt carbon nanotubes powerpoint presentation free to download id. Graphite is made up of layers of carbon atoms arranged in a hexagonal lattice, like chicken wire see. Carbon nanotubes are remarkable objects that look set to revolutionize the technological landscape in the near future. Synthesis of carbon nanotubes by arcdischarge method.
A nanoradio is a carbon nanotube anchored to an electrode, with a second electrode just beyond its free end. The high temperature routes, such as the electricarc discharge technique. 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. This book presents the key computational modeling and numerical simulation tools to investigate carbon nanotube characteristics. Graphene ppt powerpoint presentation carbon nanotubes. The cylinders are typically closed at their ends by semifullerenelike structures. In other words, this book is intended to provide a profound knowledge of these electrical and mechanical characteristics allowing the reader to further appreciate the potential and applications of carbon nanotubes.
The meaning of the word nano is 109 and one nanometer is equal to a billionth of a meter. In contrast, carbonnanotube cold cathodes that have a vacuum gap to a standoff grid or anode of a few hundred micrometres or less, as we describe here, have low capacitances and can be. Technological applications conductive and highstrength composites energy storage and. 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 for power applications sciencedirect. The main objective of this book is to give indepth understanding of the physical electronics and mechanical properties of carbon nanotubes. It is being claimed that one day the silicon valley may turn into carbon valley. May 15, 2017 nanomaterials ppt and pdf report free download. They open an incredible range of applications in materials science. Carbon nanotube seminar ppt with pdf report study mafia. Some of the most common techniques are chemical vapor deposition, arcdischarge, and laser vaporization synthesis 2, 3.
Structure of carbon nanotube one type of carbon nanotube has a cylindrical shape with open ends. Catalytic growth of nanotubes by the chemical vapor decomposition cvd method was first used by yacaman et al. Carbon nanotubes additionally can also be used to produce nanowires of other chemicals, such as gold or zinc oxide. Nanotechnology nano from the greek word for dwarf and means 109, or onebillionth. Ppt carbon nanotubes civil engineering ce notes edurev. Scribd is the worlds largest social reading and publishing site. Carbon nanotubes cnts are cylindrical large molecules consisting of a hexagonal arrangement of hybridized carbon atoms, which may by formed by rolling up a single sheet of graphene singlewalled carbon nanotubes, swcnts or by rolling up multiple sheets of graphene multiwalled carbon nanotubes, mwcnts.
Cnts possess unique and excellent structural, optical and electrical properties for the development of advanced drug delivery systems. Here it refers to onebillionth of a meter, or 1 nanometer nm. Carbon nanotube applications powerpoint ppt presentation. Sources of carbon employed to date include bulk graphite, hydrocarbons, and carbon monoxide. Introduction to the properties of carbon nanotubes. Types, methods of preparation and applications parijat pandey, mandeep dahiya department of pharmaceutical sciences, maharshi dayanan d university, rohtak, har yana, india. Carbon nanotubes are the basic material for constructing the electronic devices of nanosize. Free download of seminar ppt and report in pdf and doc huge list of latest ieee seminar ppt,seminar reports,papers, ppt topics and general seminar topics, pdf, doc and presentation ideas for b. Cnt is configurationally equivalent to a two dimensional graphene sheet rolled into a tube. Ppt carbon nanotubes powerpoint presentation free to download. Carbon nanotubes seminar report by shuhabutariq 1si03ec109. Carbon nanotubes free download as powerpoint presentation. Ppt carbon nanotube applications powerpoint presentation, free. Nanotubes have been constructed with lengthtodiameter ratio of up to 2,000,000.
Ichihashi, nature 363 603 1993 largescale synthesis of carbon nanotubes, t. A graphene sheet can be rolled more than one way, producing different types of carbon nanotubes. Over the past many decades there has been a sudden growth in the field of research and advancement related to the nanomaterials. Ppt an introduction to carbon nanotubes powerpoint presentation free to download id. Rollingup a graphene sheet to form a tube powerpoint presentation. Binding sites for a carbon nanotube are preferentially defined at the ends of the tube on the pentagonal ring. Interesting graphene powerpoint presentation illustrates the carbon nanotubes, graphenes properties and applications. International journal of engineering research and general. Dec 20, 2017 page 1 carbon nanotubes page 2 carbon nanotubes what are carbon nanotubes. Carbon nanotubes can be used in scanning probe instruments due to their flexibility.
Nanotubes carbon nanotubes are classified in following two types, 1, 9 swnts single walled carbon nanotubes mwnts multiple walled carbon nanotubes comparision between swnt and mwnt is as presented in table 1. It is important to explain that carbon nanotubes and graphene have the same molecular structure geometry. Carbon nanotubes cnts are allotropes of carbon with a cylindrical. Chemical vapor deposition cvd cvd has the highest potential for mass production of carbon nanotubes. Johnson space center is seeking patent protection for this technology. As a group, carbon nanotubes typically have diameters ranging from nanotubes much longer, and measured in centimeters. They are allotropes of carbon with a cylindrical nanostructure. In simple words the carbon nanotubes have the hexagonal cells lattice rolled onto itself with the diameters in the order of nanometers. They can be thought of as a sheet of graphite a hexagonal lattice of carbon rolled into a cylinder. This is a nanoscopic structure made of carbon atoms in the shape of a hollow cylinder. In the past years, nanoscience is emerging as one of the vital and exciting areas of interest in all the areas of science and applied science.
In this section, some applications of carbon nanotubes that could become a reality in the near future are briefly described in details. These cylindrical carbon molecules have interesting 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. Cornell university 2008 carbon nanotubes are tiny hollow cylinders, made from a single graphene sheet, that possess many amazing properties. Carbon nanotube transistors, sensors, and beyond xinjian zhou, ph. A demonstration should be shown or made into another 5 minute activity with the paper printed graphene sheets showing. Introduction classification of cnts applications properties conclusions. 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.
The industrial application of the carbon nanotubes requires the development of techniques for largescale production of defect free nanotubes. This article provides background information that allows you to better understand technical articles that discuss carbon nanotubes. Arc discharge method10 arc discharge method has been reported for producing carbon nanotubes. The adobe flash plugin is needed to view this content. Introduction to the properties of carbon nanotubes january 20, 2017 by mark hughes carbon nanotubes have received a lot of press coverage in recent years. Nanotechnology building and using materials, devices and machines at the. As a group, carbon nanotubes typically have diameters ranging from free, clean water. Tomorrows society will be shaped by nanotube applications, just as siliconbased technologies dominate society today. Introduction to carbon nanotubes 9 for the two latter methods arc and laser, the carbon source is a graphite anode arc or a graphite target laser previously loaded with the catalysts. A porous substrate may be desired, so electrochemical. While the details of the growth process are far from understood, the basic elements are now coming into focus.
Investigation into their properties has become one of the most active fields of modern research. Ppt an introduction to carbon nanotubes powerpoint. Generally, synthesis methods of carbon nanotubes can be classified into two main categories corresponding to different temperatures. However, to exploit as much as possible these properties, most of the applications require the functionalization of carbon nanotubes, such as. Ppt carbon nanotubes powerpoint presentation free to. Another reason why nanotubes have generated intense research activities from scientists of various disciplines is they. The synthesis of carbon nanotubes can be accomplished in a wide variety of methods that involve the catalytic decomposition of a carbon containing gas or solid. Carbon nanotubes carbon nanotubes, long, thin cylinders of carbon, were discovered in 1991 by sumio iijima. Cryogenic grinding seminar and ppt with pdf report. Oct 20, 2016 chemical vapor deposition cvd cvd has the highest potential for mass production of carbon nanotubes. Presently various techniques are used to manufacture mwnts or swnts. Carbon nanotubes, long, thin cylinders of carbon, were discovered in 1991 by sumio iijima. Carbon nanotube c nt is a tabular form of carbon with diameter as small as 1nm.
Synthesis of carbon nanotubes fb physik, fu berlin. The flexibility of the nanotubes prevents damage to the sample surface and the probe tip if the probe. It can produce bulk amounts of defect free cnts at relatively low temperatures. There are three types of carbon nanotubes armchair, zigzag and chiral helical nanotubes. It is expected that accuracy, efficiency and extremely small size of these devices will be responsible for replacing all electronic devices to nano carbon devices. Apr, 2012 carbon nanotubes are the basic material for constructing the electronic devices of nanosize. The optical properties of cnts are closely linked to their structure and optical absorption of cnts is of saturable intensity dependent nature. Global carbon nanotubes market 2 carbon nanotubes are a form of carbon molecules that exist in the form of a tube like structure. Ppt carbon nanotubes powerpoint presentation, free. Carbon nanotubes definition structure classification properties applications drawbacks conclusion definition.
For the tube we assigned as 11, 2 or 12, 2, the ldos is finite and constant between. In this section we will take a closer look at one particular nanostructure. These nanotubes have enhanced set of characteristics that make them stronger than steel, with a large reduction of weight. Singlewalled carbon nanotubes 207 iv data recorded along the two tubes discussed earlier exhibit very different features fig.
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