Carbon Nanotubes (CNTs) and graphene exhibit extraordinary electrical properties for organic materials, and have a huge potential in electrical and electronic applications such as sensors, semiconductor devices, displays, conductors and energy conversion devices (e.g., fuel cells, harvesters and batteries). This report brings all of this together, covering the latest work from 78 organizations around the World to details of the latest progress applying the technologies. Challenges and opportunities with material production and application are given. ( http://www.bharatbook.com/Market-Research-Reports/Carbon-Nanotubes-and-Graphene-for-Electronics-Applications-Technologies-Players-Opportunities.html )
Applications of Carbon Nanotubes and Graphene for electronics applications
Depending on their chemical structure, carbon nanotubes (CNTs) can be used as an alternative to organic or inorganic semiconductors as well as conductors, but the cost is currently the greatest restraint. However, that has the ability to rapidly fall as new, cheaper mass production processes are established, which we cover in this report. In electronics, other than electromagnetic shielding, one of the first large applications for CNTs will be conductors. In addition to their high conductance, they can be transparent, flexible and even stretchable. Here, applications are for displays, replacing ITO; touch screens, photovoltaics and display bus bars and beyond.
In addition, interest is high as CNTs have demonstrated mobilities which are magnitudes higher than silicon, meaning that fast switching transistors can be fabricated. In addition, CNTs can be solution processed, i.e. printed. In other words, CNTs will be able to provide high performing devices which can ultimately be made in low cost manufacturing processes such as printing, over large areas. They have application to supercapacitors, which bridge the gap between batteries and capacitors, leveraging the energy density of batteries with the power density of capacitors and transistors. Challenges are material purity, device fabrication, and the need for other device materials such as suitable dielectrics. However, the opportunity is large, given the high performance, flexibility, transparency and printability. Companies that surveyed report growth rates as high as 300% over the next five years. Graphene, a cheap organic material, is being enhanced by companies that are increasing its conductivity, to be used in some applications as a significantly cheaper printed conductor compared to silver ink.
Activity from 78 organizations profiled
Report coves 78 companies and academic institutions working on carbon nanotubes and graphene, all profiled in the report. While manufacturers in North America focus more on single wall CNTs (SWCNTs); Asia and Europe, with Japan on top and China second, are leading the production of multi wall CNTS (MWCNTs) with Showa Denko, Mitsui and Hodogaya Chemical being among the largest suppliers. The split of number of organizations working on the topic by territory is shown below.
Opportunities for Carbon Nanotube material supply
A number of companies are already selling CNTs with metallic and semiconducting properties grown by several techniques in a commercial scale but mostly as raw material and in limited quantities. However, the selective and uniform production of CNTs with specific diameter, length and electrical properties is yet to be achieved in commercial scale. A significant limitation for the use of CNTs in electronic applications is the coexistence of semiconducting and metallic CNTs after synthesis in the same batch. Several separation methods have been discovered over the last few years which are covered in the report, as is the need for purification.
Opportunities for Carbon Nanotube device manufacture
There are still some hurdles to overcome when using printing for the fabrication of thin carbon nanotube films. There is relatively poor quality of the nanotube starting material, which mostly shows a low crystallinity, low purity and high bundling. Subsequently, purifying the raw material without significantly degrading the quality is difficult. Furthermore there is also the issue to achieve good dispersions in solution and to remove the deployed surfactants from the deposited films. The latest work by company is featured in the report.
Key benefits of purchasing this report
This concise and unique report gives an in-depth review to the applications, technologies, emerging solutions and players. It addresses specific topics such as:
Activities of 78 global organizations which are active in the development of materials or devices using carbon nanotubes or graphene.
Application to conductors, displays, transistors, super capacitors, photovoltaics and much more
Types of carbon nanotubes and graphene and their properties and impact on electronics
Current challenges in production and use and opportunities
Forecasts for the entire printed electronics market which carbon nanotubes and printed electronics could impact
For those involved in making or using carbon nanotubes, or those developing displays, photovoltaics, transistors, energy storage devices and conductors and want to learn about how they can benefit from this technology, this is a must-read report.
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A brief video explaining what a carbon nanotube is and what they might bring to future technologies. Audio from Earth & Sky, produced for Too Small To See. www.earthsky.org www.toosmalltosee.org
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If nanobots were to exist one day, they would not likely “see” in the traditional meaning. That is, they will not have “eyes” that use visible light to see their surroundings. Instead, they will “see” via sensors that sense their environments, such as the pH level, or glucose level in blood…etc, or sense things in very close proximity, e.g. whether they are touching/attached to a red blood cell, white blood cell, or other cell types. In this regard (sensing as “seeing”), there is a lot
Carbon nanotube (CNT) is a new form of carbon, configurationally equivalent to two dimensional graphene sheet rolled into a tube. It is grown now by several techniques in the laboratory and is just a few nanometers in diameter and several microns long.
CNT can be metallic or semiconducting and offers amazing possibilities to create future nanoelectronics devices, circuits, and computers.
CNT exhibits extraordinary mechanical properties: the Young's modulus is over 1 Tera Pascal. It is stiff as diamond. The estimated tensile strength is 200 Giga Pascal. These properties are ideal for reinforced composites, nanoelectromechanical systems (NEMS).
The nanomaterials are harvested by being placed in a liquid solvent, such as ethanol, and blasted with ultrasonic waves to loosen them from the wafer surface. Researchers must then sort through the billions of nanowires or nanotubes to find the few that meet the specifications they need for their sensor applications.
of research going on. While they may not be specific to nanotubes, they do pertain to nanotechnology. One example uses nanotechnology circuits and nano-materials to build a sensor to sense pH levels in biological systems.
Carbon nanotubes, long, thin cylinders of carbon, were discovered in 1991 by S. Iijima. These are large macromolecules that are unique for their size, shape, and remarkable physical properties. They can be thought of as a sheet of graphite (a hexagonal lattice of carbon) rolled into a cylinder. These intriguing structures have sparked much excitement in the recent years and a large amount of research has been dedicated to their understanding. Currently, the physical properties are still being discovered and disputed. What makes it so difficult is that nanotubes have a very broad range of electonic, thermal, and structural properties that change depending on the different kinds of nanotube (defined by its diameter, length, and chirality, or twist). To make things more interesting, besides having a single cylindrical wall (SWNTs), nanotubes can have multiple walls (MWNTs)–cylinders inside the other cylinders. nanotubes are of great interest because of their remarkable structural, electronic and mechanical properties. They may also lead to rich industrial developments. they also have been used to design and constructed many sensors. in near future NASA is going to use them in space.
General questions are very welcome.
My personal opinions to your questions (the future is always hard to predict, so I can only offer you my opinion):
1. Search “Super-thin nanotube body armor promises to stop and deflect bullets”. It is an article on nanotubes for body armor applications. While I may not agree with the entire article, I do think that nanotubes have plenty of applications besides electronics.
Short: the silicon is not there and does not matter
Long: There is no silicon disc in the original scholar paper (reference #1). The nanotubes are grown by chemical vapor deposition (CVD, reference #3) on silicon wafers, but are then peeled off (possibly with a razor blade – refs. #2 and #4) as a freestanding film having 0.045% index of reflection. The guys in reference #2 also grew the tubes on metal films and nanoparticles (they originally developed the CVD method to grow carbon nanotubes). Their tubes have slightly different properties, so Ajayan tweaked the process a little bit to get the desired nanotube properties (this is a function of growing conditions). The silicon does not matter.
My research group grows silicon nanowires in a very similar manner (ref. #4, our paper actually cites ref. #1), and there we just have plain covalent bonds attaching the wires to the silicon substrate, the silicon wires grow as a continuation of the substrate crystal lattice, so we get single crystal quality determined by the substrate. I suspect that even though they did not investigate the attachment, they have plain covalent bonds as well.
carbon nano tube is the material. however in the field of state-of-the-art military tech, ceramic plates offer the best protection today from projectile weapons.
in the field of space, aerogel offer the best thermal protection, if someone came after you with a flame thrower
in the field of electronics, a plasma shield or some kind of electromagnetic field can protect your from being seen by electronics, harmed by radiation, and will stop bullets, fire, and other physical harm soon.
so the best shield there is isn't actually a material, but energy.
as for materials, ceramic plates and aerogel will be sufficient to protect you from most hazards.
Instead, an alternative may be to add something on the road and car tires which help them stick to each other, despite rain/snow. Or, to add something to the road which causes water to have a suppressed freezing point when it’s wetting the road. This will lead to less ice and black ice, which could help improve road conditions. However, all this is just a possibility, and may or may not materialize.
Thus, it is not unreasonable to speculate that nanotubes could be used in body armor to provide better protection due to the nanotube’s great mechanical properties (I don’t know about “deflect” though).
2. Nanotubes current have no known “healing” effects that I am aware of. Thus, I personally find it unlikely that nanotubes will be used as a medical “healer”. However, nanotube may one day be used as electrical components (circuits/batteries/sensors) in medical devices,
-nanotubes are indeed light-weight given its strength
-nanotubes, mixed in with various materials, have been shown to improve the mechanical properties of those various materials
yes.
and one more ( i couldn’t fit it into the other comment box)
3. Could some solution be mixed into tar, or the blacktop used in roads to make ice and rain “not” stick to it?? therefore eliminating some of the worst driving conditions there are, and as a result less crashes and related deaths occuring.
Thank you for your opinion. While I will not speculate on this possibility, allow me to provide some related facts:
-nanotubes are one of the strongest materials known, if you normalize to it’s nano size (tensile strength is more than steel & diamonds)
-however, nanotubes in bulk, may or may not be super-strong, depending on how it is woven (or not) into a form of fiber
IBM has a method that tags nanotubes with marker molecules than will then self assemble the nanotubes in a manner similar to a biological process. The markers are then stripped away.
A carbon nanotube has a tensile strength 50 times that of steel, and a strength-to-weight ratio of over 300 times that of steel.
Things like "withstanding an explosion" have far too many variables to make a worthwhile comparison.
which may help the body heal (though the nanotube itself does not do the healing directly).
3. This is an interesting idea and perhaps something along these lines can be investigated. While it there are already anti-stick nano coatings today (e.g. teflon in your pots/pans, specially treated windshields…), I do not think they will be used on roads. The main reason is that if rain and water don’t stick to the road, it’s likely your car’s tires won’t either, which is very bad.
It's not necessarily something that carbon nanotubes specifically used for, so much as a broad application you can also use carbon nanotubes for. The main way they detect glucose is that you put an enzyme (glucose oxidase) on the surface of an electrode. The enzyme in the presence of glucose will make hydrogen peroxide which your electrode can then reduce. When your electrode reacts with the peroxide, the current flowing can be measured (actually there are a variety of electrical properties you could choose to measure, we'll just use current as an example), and based on a known conversion factor, that current signal can be used to estimate how much glucose is present. Recently carbon nanotubes have been used as a new kind of electrode for this process.
i have heard of people that make nanotube in solution and then applying a weak magnetic force to allow for them to line up and then evaporating the solution. but it depends alot on the substrate you are trying to apply this to and the overall properties you want to see out of the single walled or multi walled carbon nanotube. here is one i found from JACS wesite
J. Phys. Chem. B, 2002, 106 (16), pp 4139–4144
DOI: 10.1021/jp0140872
Publication Date (Web): March 30, 2002
Copyright © 2002 American Chemical Society