Worlds best powerpoint templates powerpoint ppt presentation. Bethune and sumio iijima independently discover singlewall carbon nanotubes and methods to produce them using transitionmetal catalysts 11292014 6 university of the punjab. Cornell university 2008 carbon nanotubes are tiny hollow cylinders, made from a single graphene sheet, that possess. The prepared porous co 3 o 4 nanotubes exhibit superior li. A template method for carbon nanotube production from. Template synthesis of wellgraphitized carbon nanotube arrays. A free powerpoint ppt presentation displayed as a flash slide show on id. Cnt are of high technological interest because they can be produced or refined to possess specific properties such as high. Electrical and morphological behavior of carbon nanotubes. Nanotubesnanowires aligned in templatenanotubesnanowires aligned in template disadvantages of template wetting nanotubesnanowires aligned in template may require wetting agent not well established theory for design of new if desired, the template can be selectively etched to release the nanotubes. John hart4,5 worldwide commercialinterest in carbon nanotubes. 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. Over the past many decades there has been a sudden growth in the field of research and advancement related to the nanomaterials. Explore carbon nanotube flow sensors with free download of seminar report and ppt in pdf and doc format.
Jun 30, 2001 the average diameter of the nanotubes is 38 nm and is smaller than that of the alumina channel pores. In this section we will take a closer look at one particular. They have incredible physical and electronic properties, which has made them the subject of much research in academia and industry in recent years. Singlewalled carbon nanotubes 205 dices determine whether a swnt will be a metal or a semiconductor. An introduction to carbon nanotubes university of tennessee. Several techniques have been developed recently for fabricating nanocomposite structures by filling carbon nanotubes 4,5. Scribd is the worlds largest social reading and publishing site.
Download the book into available format new update. Carbon nanotubes cnts have been widely used in various applications due to their exceptional thermal 1, mechanical 2. Porous co3o4 nanotubes derived from co4co12 clusters on. Carbon nanotubes as removable templates for metal oxide. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect.
Graphene ppt powerpoint presentation carbon nanotubes. 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 ieee biomedical engineering, biotechnology in btech, be, mtech students for the year 2015 2016. It can be seen that the parallel cylindrical pores are filled with the cnts. By oxidation we can partially purify cnts from impurities time and temperature of. Carbon nanotubes produced from ambient carbon dioxide for. Dagotto spring2009 march 24, 2009 abstract this paper will introduce many of the interesting aspects of carbon. A porous structure of swnts template was used to fabricate porous tin oxide nanotubes. Ppt carbon nanotubes powerpoint presentation free to view. This approach entails chemical vapor deposition cvd based synthesis of carbon within the pores of an alumina template membrane with or without a ni catalyst. Using the solar thermal electrochemical process step, ambient co2 captured in molten lithiated carbonates leads to the production of carbon nanofibers cnfs and carbon nanotubes. Winner of the standing ovation award for best powerpoint templates from presentations magazine. 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. Carbon nanotubes are molecular tubes formed from rolledup sheets of graphene.
July 2016 learn how and when to remove this template message. Carbon nanotubes cnts have attracted intensive interests of researchers for a long time due to their fascinating physical and chemical properties promising for various potential applications, including advanced ceramics, nanoelectronic devices, nanoscale sensors, solar cells, battery electrode, field emitters, etc. Carbon nanotubes definition structure classification. Carbon nanotubes are remarkable objects that look set to revolutionize the technological landscape in the near future.
Carbon nanostructure growth inside porous templates can be performed using two different approaches. Another reason why nanotubes have generated intense research activities from scientists of various disciplines is they. These tubes of carbon are usually only a few nanometres wide, but they can range from. Cornell university 2008 carbon nanotubes are tiny hollow cylinders, made from a single graphene sheet, that possess many amazing properties. This article also presents recent work in the controlled synthesis of carbon nanotubes with ordered architectures.
Present and future commercial applications michael f. In this section we will take a closer look at one particular nanostructure. Nanotechnology an engineering solution to medical problems paper presentation. These are large macromolecules that are unique for their size, shape, and remarkable physical properties. Carbon nanotubes discovered in 1991 by sumiyo iijima, a japanese scientist working at the nec. If you continue browsing the site, you agree to the use of cookies on this website. Synthesis and applications powerpoint presentation free to view id. By papob lertapanon 5310755748 j ittaporn songprakob 5310755524. The cost and practicality of greenhouse gas removal processes, which are critical for environmental sustainability, pivot on highvalue secondary applications derived from carbon capture and conversion. 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. Chemical vapor deposition based synthesis of carbon nanotubes. These ingredients can cause defects and complicate fabrication of long crystalline carbon nanotubes.
Introduction to the properties of carbon nanotubes. Here we show that surfacetension effects can induce the growth of. Tin oxide nanotube structures synthesized on a template of singlewalled carbon nanotubes. Binding sites for a carbon nanotube are preferentially defined at the ends of the tube on the pentagonal ring. Carbon nanotube transistors, sensors, and beyond xinjian zhou, ph. Ppt carbon nanotubecnt process powerpoint presentation. Learn how and when to remove this template message. High temperature preparation techniques for example laser ablation or arc discharge were first used to synthesize cnts, but currently, these. They have incredible physical and electronic properties, which has made them the subject of much research.
Carbon nanotubes cnts have attracted intensive interests of researchers for a long time due to their fascinating physical and chemical properties promising for various potential. The prepared porous co 3 o 4 nanotubes exhibit superior. The method makes use of polyelectrolytes for wrapping carbon nanotubes and providing them with adsorption sites for electrostatically driven nanoparticle deposition. For example, doublewalled carbon nanotubes have two concentric layers. These cnts have aspect ratio exceeding and vividly demonstrate the result of the template synthesis process. Ppt carbon nanotubes powerpoint presentation free to. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Chemical vapor deposition based synthesis of carbon.
Porous and polycrystalline co 3 o 4 nanotubes have been derived from co 4 co 12 clusters on carbon nanotube templates. Carbon nanotube formation using zeolite template and applications. Also explore the seminar topics paper on carbon nanotube flow sensors with abstract or. Department of physics, university of tennessee, knoxville, tn 37996. Carbon nanotubes cnt belong to a large group of hollow fiberlike carbon based nanomaterials with diameters mostly below 100 nm and very high aspect ratios. Carbon nanotube formation using zeolite template and. The cost and practicality of greenhouse gas removal processes, which are critical for environmental sustainability, pivot on highvalue secondary applications derived from carbon capture and conversion techniques.
Moreover the catalytic carbon deposition for cnt template fabrication inside nanoporous channels with the smallest diameters seems to be too difficult to. Mwcnts may be stiffer than swcnts and may potentially be of greater health and. Ppt carbon nanotube powerpoint presentation, free download. Graphite is made up of layers of carbon atoms arranged in a hexagonal lattice, like chicken wire see. A tem image of carbon nanotubes formed at 800 c cvd conditions and liberated from the pam by immersion in concentrated hf with ultrasonication. Standard image highresolution image export powerpoint slide. By oxidation we can partially purify cnts from impurities time and temperature of exposure of the process are very important. Carbon nanotubes cnt belong to a large group of hollow fiberlike carbonbased nanomaterials with diameters mostly below 100 nm and very high aspect ratios.
Tomorrows society will be shaped by nanotube applications, just as siliconbased technologies dominate society today. 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. Optical properties of ordered carbon nanotube arrays grown. Template assisted layerbylayer fabrication of protein nanotubes a major qualifying project report. In this work, we have investigated the bandstructures and the effective mass of nanotubes. Synthesis, integration, and properties hongjie dai department of chemistry, stanford university, stanford, california 94305 received january 23, 2002 abstract synthesis of. Types, methods of preparation and applications parijat pandey, mandeep dahiya department of pharmaceutical sciences, maharshi dayanan d university, rohtak, har yana, india. Carbon nanotubes is the property of its rightful owner. Methods for the chemical synthesis of carbon nanotubes. Apr 23, 2018 singleshell carbon nanotubes of 1nm diameter, s. Tomorrows society will be shaped by nanotube applications, just as. In nanotechnology, carbon nanotube interconnects refer to the proposed use of carbon nanotubes in the interconnects between the elements of an integrated circuit. Carbon nanotubes seminar report by shuhabutariq 1si03ec109. Dielsalder cycloadditionaromatization strategy for elongating armchair cnt templates.
Carbon nanotubes seminar report by shuhabutariq 1si03ec109 5 nanotubes are cylindrical fullerenes. This article provides background information that allows you to better understand technical articles that discuss carbon nanotubes. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. A template method for carbon nanotube production from sugar water. Carbon nanotubes carbon nanotubes, long, thin cylinders of carbon, were discovered in 1991 by sumio iijima. Presently various techniques are used to manufacture mwnts or swnts. Tin oxide nanotube structures synthesized on a template of. May 06, 2010 carbon nanotubes presentation for 2010 ct expo slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Carbon nanotubes presentation for 2010 ct expo slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. We present a simple, generally applicable procedure for the assembly of nanoparticles on carbon nanotubes in aqueous solution. Interesting graphene powerpoint presentation illustrates the carbon nanotubes, graphenes properties and applications. In nanotechnology, carbon nanotube interconnects refer to the proposed use of carbon. Y2bacuo5 y211 powders using carbon nanotubes as template. Ichihashi, nature 363 603 1993 largescale synthesis of carbon nanotubes, t.
The high temperature routes, such as the electricarc discharge technique. We introduced a simple method to synthesize onedimensional tin oxide. Generally, synthesis methods of carbon nanotubes can be classified into two main categories corresponding to different temperatures. The optical properties of cnts are closely linked to their structure and optical absorption of cnts is of saturable intensity dependent nature. 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. They can be thought of as a sheet of graphite a hexagonal lattice of carbon rolled into a cylinder. This approach entails chemical vapor deposition cvd based synthesis of carbon within the pores of. Carbon nanotube flow sensors seminar report, ppt, pdf.
443 219 1235 107 558 1151 444 1609 865 1576 1252 380 1205 1366 759 901 1526 227 459 1289 1458 248 335 638 644 273 962 388 474 469