In one of the incredible applications of graphene in the health industry, Scientists in the University of Manchester are developing ultra thin graphene condoms.  Though current condoms are almost excellent barriers of unwanted contaminants, they are heavy and thick — which is the reason they reduce sensation and probably why people do not like wearing them, no matter the risk.

Ultra Thin Graphene Condoms

The team of Scientists from the university has received a grant of £62,123 to work on the project from the Bill and Melinda Gates foundation.  This is through the foundation`s Grand Challenges exploration program which supports creative projects aimed at improving health of people in the developing world. According to Dr Aravin Vijayaraghavan who will lead the team of scientists researching condom, if the project succeeds we might have an everyday use which literally will touch everyday life in the most intimate way.

The team at Manchester is only one of the 11 teams that received grants from the foundation to work on the project.  In their call to the Scientists on March 2013, the foundation sees the project`s success as what is going to be the next generation condom that enhances and significantly preserves pleasure.  In their proposal the condoms to be developed, must at least work well just like the existing condoms.

Graphene is a wondrous material with properties that make it the most studied material. It is the strongest, the best conductor, the thinnest, and to crown the most wondrous material known to man. Graphene was first, isolated at the University of Manchester in 2004 By Professor Kostya Nevoselov and Professor Andre Geim.   Currently several companies are putting graphene into use in develop the next generation devices.   The team of scientist according to a trusted source will use graphene with latex to develop a “nanomaterial” that could be used to make the thinnest condom.

With the experience, the team has on graphene we hope they will soon come up with a condom that will lower rate of HIV/AIDS and other sexually transmitted diseases transmission in the developing world.

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Lomiko Metals

Lomico Metals Inc. (CVE:LMR) is a company that engages in acquiring, exploring and developing mineral resource properties in Canada. The company is mostly engaged in the exploration of zinc, gold and graphite deposits. It has a large claim in Vines Lake Property in the south eastern part of Cassia town, found in British Columbia. It has some interests in Quatre Milles Property which cover at least 3,000 acres in the North Western parts of Montreal, Quebec. Initially, the company was known by the name Lomiko Resources Inc., and it acquired the new name in October 2008. Lomico Metals Inc. was incorporated in 1987 and is headquartered in Surrey, Canada.

Lomiko Metals Inc. has recently changed its main focus to the development of High-Performance Graphene-Enhanced materials that are vital for three dimensional (3D) printing. The 3D labs have gone a step further in promoting 3D printing technology in the current world. Best quality graphite is a basic material to be used in the production of graphene. Lomiko will generally provide quality graphite to Graphene 3D Labs and has been rated the most exclusive supplier which has interests to provide a $50,000 start-up capital for a quarter a million shares entitled to dividends.

Lomiko Metals Inc. recently announced its strategic alliance with Graphene Laboratories Inc., this process has resulted in the production of excellent quality graphene for various uses, despite the fact that the production is yet to be made efficient for commercial purposes; a lot is being done to improve the production process.

Lomiko is entering into various deals that will see them become one of the leading producers of this material; this has been made possible by investing more funds into the production of the materials as well as entering into contracts with other companies aimed at making the production process more efficient.

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Due to the discovery of more graphene applications, the University of Pennsylvania has established a small research company named “Graphene Frontiers” to provide technological solutions for production of quality graphene. This body was awarded 0.744 million dollars in September to improve production of graphene in a unique process known as the roll-to-roll process. This process is expected to make the production of high quality graphene more efficient than the rather. Graphene Frontiers is making attempts to lead other producers into creating polycrystalline mono-layers of graphene through a roll-on-roll process, as opposed to the current chemical vapor decomposition (CDV) process.

Types of graphene

There are two major types of graphene: monocrystalline and polycrystalline. These two types have different applications. Polycrystalline graphene is crucial to manufacture some types of transistors and advanced composites, while monocrystalline graphene is used in more advanced applications. Despite the high demand for monocrystalline graphene, its methods of extraction do not allow large scale production. Up to date, monocrystalline graphene is produced through mechanical cleavage a technique in which graphene is extracted from graphite in single layer flakes.

This limitation has attracted a lot of investments in research into best ways to extract monocrystalline graphene. One of the companies that has invested heavily in this is Graphene Frontiers. So far they have made a breakthrough and are working on ways of making it even better. There are numerous techniques suitable for producing excellent quality graphene, and since each of them has its own shortcomings and advantages, it is not possible to say which technique is best.

One of the most commonly used techniques entails extracting carbon layers from graphite using chemical, plasma and mechanical exfoliation techniques. Unfortunately, this process leads in the production of low quality graphene.

Advanced producers use CVD techniques which do not start with mined graphite. These result in the production of synthetic graphene. This type is of excellent quality, but the major problem is until now, convenient ways of producing it have not been realized.

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Lunar Elevator

Scientists at Columbia University conducted a study which revealed that graphene retains most of its mechanical properties even when it has been stitched together from small fragments. This discovery may have been the first step toward large scale manufacture of carbon nanotubes, which could be essential in the manufacturing of the first space elevator, light – strong materials, and flexible electronics.

At the present moment, a practical breakthrough in the construction of a lunar elevator has not been realized. However, many scientists have performed experiments which show it will be possible through use of graphene. In these experiments, they have measured the strength of the microscopic carbon nanotube and proved it can indeed support the construction of such elevators.

The space elevator ribbon is constructed out of carbon nanotubes, which are at least 100 times stronger than steel but have flexibility equal to that of plastic. Scientists will only be able to make the ribbon to be used in the space elevator if they manage to make fibers out of carbon nanotubes. In the recent experiments, the materials that were involved were neither strong nor flexible enough to form such a ribbon.

Graphene ribbons have a very high tensile strength and very high elastic modulus, theoretically they are said to make the process of building a space elevator easy. There are two major ways that a lunar elevator ribbon can be built: in the first case a long carbon tube ideally several meters long will be braided into a rope like structure, and in the second case a shorter nanotube will be placed in a selected polymer matrix.

So far graphene is the ideal material for construction of the ribbon, the carbon-carbon bond in graphene is at least 0.142 nm. Scientists have proved that two sheets of graphene are held together by much stronger van de Waals forces than bulk Graphene.

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Researchers have developed a graphene liquid cell that can be used together with the conventional transmission electron microscopy (TEM) to view ‘soft materials’ in three-dimensional. The term ‘soft materials’ refers to a number of things, including biological compounds such as protein, plastics, DNA, flexible electronics, therapeutic drugs, and some types of photovoltaics.

Even though these materials form an integral part in our lives, it has been a challenge to study them conveniently. These materials (especially biological compounds) pose numerous questions, especially the way they behave at the nanoscale.

3D printing-DNA

Through a combination of transmission electron microscopy (TEM) and their own unique graphene liquid cell, the researchers have recorded the three-dimensional motion of DNA connected to gold nanocrystals. This is the first time TEM has been used for 3D dynamic imaging of so-called soft materials. Conventionally, TEM focuses a beam of electrons on the soft materials to illuminate and magnify them as means of providing a resolution used to study their properties. This technique, unlike the use of light, requires a high vacuum setting since molecules in the air perturb the electron beam. In such a high vacuum environment, liquids evaporate. This necessitates soft materials that are highly viscous to be sealed hermetically using special solid containers. These containers, called cells, have a viewing window through which the TEM forms an image.

For some time now, these viewing windows have been made of silicon which limits the resolution of the soft materials under study because of its thickness. It also disturbs the soft materials’ natural state. To overcome these challenges, researchers have now developed a liquid cell made from graphene membrane, which is one atom thick.

They bonded two opposing graphene sheets to form a sealed nanoscale chamber. This chamber has within it a stable aqueous solution which is transparent to the electron beams of the TEM. This minimizes the loss of imaging electrons as well as provides a very high resolution which is touted to be very useful in studying soft materials.

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Given the impending bottleneck of supply in indium tin oxide, a material currently used as a transparent conducting film, researchers are now focusing their attention on graphene as a cheaper alternative since it has ideal properties for this purpose.

Photo-voltaic manufacturers have taken little interest in using graphene as a replacement of indium tin oxide as a transparent conducting film, even when graphene has the highest potential of filling this looming gap. This lack of interest has been partly due to little research into what happens to graphene’s attractive conductivity when used together with silicon.

This, however, will change now that researchers have found out that graphene does not lose its remarkable properties when used together with silicon.

Graphene and Silicon Solar Cell

Researchers had revealed that when graphene is incorporated into a pile of layers, same a thin film solar cell based on silicon, the material does not significantly change its conductive properties as initially feared.

The researchers used a process of chemical vapor deposition to grow the graphene on a copper sheet, transferred it to a substrate made from glass, and then covered it with a thin film made from silicon. The researchers experimented with different morphologies of silicon and found out that graphene maintained its conductive properties in all cases. Graphene still retains its properties, even when coated with silicon with different characteristics.

The conductive properties of graphene, when measured, exceeded most materials. For instance, its carrier mobility is 30 times higher than that of the conventional contact layers based on zinc oxide. Despite the fact that it is difficult to use contact layers made from graphene with external contacts, the prospects have attracted interest all over the world. Already, thin film technology enthusiasts have invested in incorporating this development in their work.

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We will soon retrieve data from a broken device, thanks to graphene oxide’s refractive index and fluorescence that can be manipulated.

A new material promises the possibility of recovering data even from a broken device. Graphene, the ‘wonderful material’ has unique properties that include; unmatched strength, flexibility, lightness, conductivity, and transparency. These properties make graphene to next big thing that will spearhead the next generation of gadgetry design. Graphene oxide has the same characteristics, but its refractive index and fluorescence properties, which can be manipulated, make it special in making media that guarantee your data security.

Graphene Oxide

Holographic storage of data has been the talk in science for a while now but graphene oxide has made it almost real. Researchers increased the oxide’s refractive index by between ten to hundred times. They also decreased the oxide’s fluorescence to make it ideal for bioimaging and multimode optical recording. This large refractive index means that data storage can be merged with holography. This would not only ensure that the data is securely coded but also that it is easily retrievable even from a broken device.

Most companies spend a lot of resources hiring the services of data centres or establishing one. These data centres spend a lot of money replicating information several times over (back up, disaster recovery snapshot, live copy, e. t. c). The commercial realization of this graphene oxide-based holographic storage of data will save a lot of resources that go into managing data in anticipation of loss.

The discs that are currently in use today store information in binary form. If the disc breaks, it will result in automatic data loss. This, however, will no longer be the case since the new technology means that a super-disc can be made that enables data to be retrieved even from broken discs thus saving the data centres the trouble of physically duplicating data to avoid data loss.

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Recently, researchers were able to use graphene in the manufacture of a photodetector that enabled an optical chip. For some time now, graphene’s numerous promising characteristics have enticed researchers into exploring ways in which they can use it to make photodetector applications.

While graphene’s poor responsivity has limited scientific work, its wide spectral range, its speedy optoelectronic response due to its high electron mobility in, and a lack of band gaps have all contributed greatly to various application developments.

Optical Chips

Despite the fact that reduced response to light might limit graphene’s use in applications that involve digital cameras, researchers have discovered a way in which it can be used as a photodetector which converts light into electricity applied in integrated optoelectronic chips found in gadgets.

The researched developed a method to overcome the low responsivity of graphene to incoming light. They created a bias in the photodetector that would maintain the electrons disrupted by the incoming photons at a higher energy level. This bias maintains a constant voltage throughout the photodetector. To avoid the resultant noise, the researchers created a bias the photodetector without applying voltage to it.

To achieve this, the researchers used an inventive design directs light through a channel into the photodetector that is capped using graphene perpendicularly oriented to the channel. Gold electrodes are placed on both ends of the graphene, with electrode placed closer to graphene than the other. This design produces a mismatch in the energy electrons found in graphene and the metal contact. This mismatch creates an electric field close to the electrode.

In operation, the photons travel through the channel and begin to kick the electrons up to a greater energy level. The electric field then pulls these energized electrons into the electrodes, creating a current in the process- without a need to apply voltage.

This technique enables the manufacture of photodetectors that use light rather than electricity. With improvements such as thinner electrodes and narrower waveguides, it might be possible to produce higher amounts of energy.

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Over the last four decades, we have been envisioning the end to the use of silicon as a semiconductor in devices. Perhaps the end is near. Just what will replace silicon? The answer to that is a carbon nanotube.

 What are carbon nanotubes?

These are tube-shaped carbon-made materials that have very small diameters measured using the

Carbon nanotubes

nanometer scale. This scale has one billion units of a meter. Approximately, the human hair is nine ten-thousandth times thicker than one unit in the nanometer scale. Carbon nanotubes are so thin that thousands of them can fit when arranged side-by-side in the human air.

Carbon nanotubes are made of graphite layers that appear like a rolled-up chicken wire. The structure closely resembles the continuous unbroken hexagonal wire, with the carbon molecules pegged at the apexes of hexagonal patterns.

While all carbon nanotubes are made from a similar graphite sheet, the fact that they have different characteristics makes them differ in terms of electrical conductivity. This results in some acting as metals while others act as semiconductors. Some of the differing characteristics include their structures, length, thickness, and number of layers.

Typically, carbon nanotubes’ diameter vary between <1 nm and 50 nm as a group while their lengths measure several microns. Recently, advancements have made carbon nanotubes longer by advancements, making them measurable in centimeters. Carbon nanotubes are classified according to their structures:

Single-walled carbon nanotubes

Double-walled nanotubes

Multi-walled carbon nanotubes

Properties

Carbon nanotubes have intrinsic mechanical and transport properties making them ideal for ultimate carbon fibers. Carbon nanotubes exhibit a unique mix of stiffness, tenacity and strength when compared with other materials often used to make fiber. These other fiber materials usually lack at least one of these properties. The carbon nanotubes are also unmatched when it comes to thermal and electrical conductivity.

Some of the Applications

Extra strong fibers

Technical textiles

Ultra-capacitors

Biosensors

Antifouling paint

Storing gases

Flat-panel displays

Conductive plastics

Improved life batteries

Nano-electronics

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Energy storage is one field studied extensively today. While other areas of electronics have been rapidly advancing over the last few decades, there has always been an issue with storing energy that is not in used. A lot of discussions are ongoing on the best means of saving energy in electronics.  The solution to this problem is developing an efficient power element that can hold a sufficient amount of energy. The component should also be able to charge quickly and retain a substantial amount of energy over a long period. These two characteristics are very significant in the study of energy storage.

Graphene super batteries

These energy solutions are developing at a very slow rate with materials that currently used to manufacture capacitors. Scientists are studying graphene to see a possibility of developing supercapacitors that can be charged quickly, yet also have the ability to store a large amount of energy.  Scientists are predicting use of tiny graphene-based supercapacitors in low energy applications such as portable computing devices and Smartphone, in the next 5-10 years.

Graphene can also be used to enhance lithium ion batteries. These batteries are used in high energy applications such as electrically powered vehicles. Lithium batteries are also currently used in Smartphone, tablets, PCs and laptops. Graphene based batteries are going to be of significantly lower levels of weight and size.

The scientists are working on enhancing the capabilities of lithium batteries by incorporating graphene as an anode.  This development is likely to offer significant storage capacity with better longevity and high charge rate.

The new graphene based supercapacitors developed have an energy density of about 60Waths per litre. This is similar to the lead-acid car batteries. This will make them the smallest and lightest superconductors made by man.

Since the batteries store charge rather than generating current through chemical reaction, they last longer than the existing batteries.

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