The inset shows the electron diffraction pattern of the nanotube. Electrodeposition in nanoporous templates selfassembly and nanotechnology. Singlewalled carbon nanotube structure singlewalled carbon nanotubes can be formed in three different designs. Special carbon nanotube configurations, such as nanocoils, nanohorns, bambooshaped and carbon cylinder made up from carbon nanotubes are also discussed. Carbon nanotubes presentation for 2010 ct expo slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Download the book into available format new update. For a paa sample without cnt growth, the reflectance shows an oscillating pattern with wavelength. International journal of engineering research and general. Depending on the direction on which they are rolled, cnts can be semiconducting or metallic. 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. Twisting is found to transform the metallic nanotube to a semiconducting one with a band.
Template synthesis of wellgraphitized carbon nanotube arrays. Carbon nanotubes have a range of electric, thermal, and structural properties that can change based on the physical design of the nanotube. Transportation of water molecules in a carbon nanotube cnt based on an energy pump concept is investigated by molecular dynamics simulations. Simulations of carbon nanotube field effect transistors. Introduction to carbon nanotube and nanofiber smart materials.
Enhanced thermoelectric performance of singlewalled. 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. A tem image of carbon nanotubes formed at 800 c cvd conditions and liberated from the pam by immersion in concentrated hf with ultrasonication. Presently various techniques are used to manufacture mwnts or swnts. 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.
For example, the cancer drug doxorubicin was loaded at up to. In nanotechnology, carbon nanotube interconnects refer to the proposed use of carbon nanotubes in the interconnects between the elements of an integrated. Efficient templatebased nanomanufacturing of carbon nanotube arrays for cell applications by adeel ahmed a thesis submitted in partial fulfillment of the requirements for the degree of master of science in mechanical engineering supervised by associate professor dr. This enables transfection of molecular cargo attached to the cnt walls or encapsulated by cnts. Template free directional growth of cnts has been achieved on sapphire han et al. Tomorrows society will be shaped by nanotube applications, just as siliconbased technologies dominate society today. Carbon nanotubes are unique tubular structures of nanometer diameter and large lengthdiameter ratio. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Tem, sem, xrd, and raman analyses show that the polyaniline grew along the surface of cnts forming an ordered chain structure during the swntdirected polymerization. The structure of an ideal infinitely long singlewalled carbon nanotube is that of a regular hexagonal lattice drawn on an infinite cylindrical surface, whose vertices are the positions of the carbon atoms. Template synthesis and characterization of wellaligned nitrogen containing carbon nanotubes. Glassy carbon carbon soaked overnight in 5 mg1ml paste glucose oxidise phosphate buffer solution graphite paste used to attach alumina templategold backside of template to glassy nanotubegox carbon electrode for electrochemical testing.
Kumzerov a a ioffe physical technical institute, russian academy of. Porous and polycrystalline co 3 o 4 nanotubes have been derived from co 4 co 12 clusters on carbon nanotube templates. Another reason why nanotubes have generated intense research activities from scientists of various disciplines is they. Hrtem images of a carbon nanotube which resulted from completely dissolving the alumina membrane in 10 wt. The nanotube antenna differs from an ordinary antenna due to to its high kinetic inductance, characteristic impedance, etc. Osa optical properties of ordered carbon nanotube arrays. Carbon nanotube flow sensors seminar report, ppt, pdf. Materials for all of these applications have been built and tested based on carbon nanotube cnt and carbon nanofiber cnf composites. The symmetry of carbon nanotubes is described by line groups, which are the full space groups of onedimensional systems including group point symmetries e. Carbon nanotubes have many structures, differing in. Cornell university 2008 carbon nanotubes are tiny hollow cylinders, made from a single graphene sheet, that possess many amazing properties. They attached carbon nanotubes to afm probes for the purpose of increased resolution as well as decreased wear on sample and probe tip. The cnf material is 100 times lower in cost than single wall carbon nanotubes, making the applications discussed feasible based upon the current material cost.
The conductance of a carbonnanotube is mainly affected by its chirality amount of twist in the tube. By papob lertapanon 5310755748 j ittaporn songprakob 5310755524. Mceuen1, michael fuhrer2, and hongkun park3 1laboratory of atomic and solid state physics, cornell university, ithaca, ny 14853 2department of physics, university of maryland, college park, md 20742 3department of chemistry and chemical biology, harvard university, cambridge, ma 028 abstract single walled carbon nanotubes swnts. Y2bacuo5 y211 powders using carbon nanotubes as template. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Worlds best powerpoint templates powerpoint ppt presentation. Global carbon nanotube market, size, share, market intelligence, company profiles, market trends, strategy, analysis, forecast 20182023 a free powerpoint ppt presentation displayed as a flash slide show on id. Carbon nanotube applications in microelectronics by g. The optical properties of cnts are closely linked to their structure and optical absorption of cnts is of saturable intensity dependent nature. 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. They have novel properties that make them potentially useful in many applications in nanotechnology, electronics, optics and other fields of materials science. Carbon nanotubes seminar report by shuhabutariq 1si03ec109 6 1. Cnt is configurationally equivalent to a two dimensional graphene sheet rolled into a tube.
A carbon nanotube is a tubeshaped material, made of carbon, having a diameter measuring on the nanometer scale. Carbonnanotube capillary allatom, explicit water click below for input files readers comment. Bethune and sumio iijima independently discover singlewall carbon nanotubes and methods to produce them using transitionmetal catalysts 11292014 6 university of the punjab. The carbon network of the shells is closely related to the honeycomb arrangement of the carbon atoms. Hybrid nanocomposites containing carbon nanotubes cnts and ordered polyaniline pani have been prepared through an in situ polymerization reaction using a singlewalled nanotube swnt as template and aniline as reactant. Carbon nanotubes are remarkable objects that look set to revolutionize the technological landscape in the near future. Carbon nanotube transistors, sensors, and beyond xinjian zhou, ph. Carbon nanotube synthesis and growth mechanism intechopen.
A template method for carbon nanotube production from. One end of the carbon nanotube which forms the source is put in contact with the metal intrinsically and the other end of the cnt which forms the. Efficient templatebased nanomanufacturing of carbon. In nanotechnology, carbon nanotube interconnects refer to the proposed use of carbon nanotubes in the interconnects between the elements of an integrated circuit. A template method for carbon nanotube production from sugar water v. Ppt carbon nanotube powerpoint presentation, free download. Carbon nanotube c nt is a tabular form of carbon with diameter as small as 1nm. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. If you continue browsing the site, you agree to the use of cookies on this website. Since the length of the carboncarbon bonds is fairly fixed, there are constraints on the diameter of the cylinder and the arrangement of the atoms on it.
Carbon nanotube formation using zeolite template and. The nanotubes may consist of one up to tens and hundreds of concentric shells of carbons with adjacent shells separation of 0. Carbon nanotube technology, an introduction engineering. A new structure for carbon nanotube field effect transistors cntfets has been proposed recently and its currentvoltage characteristic has been simulated by zoheir kordrostami et. 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 known as graphene. A nanometer is onebillionth of a meter, or about 10,000 times smaller than a human hair. Potential applications of carbon nanotubes wikipedia. Cnt are unique because the bonding between the atoms is very strong and the tubes can have extreme aspect ratios. Michael schrlau department of mechanical engineering. Carbon nanotubes cnts can be thought of as single atomic layer graphite sheets rolled up to form seamless cylinders. Ppt carbon nanotubes powerpoint presentation free to. Porous co3o4 nanotubes derived from co4co12 clusters on. In this section we will take a closer look at one particular nanostructure. Explore carbon nanotube flow sensors with free download of seminar report and ppt in pdf and doc format.
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. The prepared porous co 3 o 4 nanotubes exhibit superior li. We have synthesized ordered carbon nanotube cnt arrays in porous anodic alumina paa matrix, and have characterized their total optical reflectance and bidirectional reflectance distribution function after each processing step of the microwave plasma chemical vapor deposition process mpcvd. We have developed a new approach for preparing graphitic carbon nanofiber and nanotube ensembles. Solar cells developed at the new jersey institute of technology use a carbon nanotube complex, formed by a mixture of carbon nanotubes and carbon buckyballs known as fullerenes to form snakelike structures ultracapacitors mit laboratory for electromagnetic and electronic systems uses nanotubes to improve ultracapacitors medical in the.
A carbon nanotube cnt is a tubular structure made of carbon atoms, having diameter of nanometer order. Chemical vapor deposition based synthesis of carbon. The theoretical minimum diameter of a carbon nanotube is around 0. These cnts have aspect ratio exceeding and vividly demonstrate the result of the template synthesis process. Aao membrane nanowire samples au ni cunanowire samples au, ni, cu b case study.
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