53. Hardware

(computer hardware materials)

Computers are a very polluting industry. They got much less polluting with this option: glass memory. Plus, it solves other material category difficulties for information storage that humans have always had for thousands of years. It's great for the consumer and culture in general since archival purposes are solved for the digital era completely. It's hard to overstate the importance of this development for the human species in general culturally as much as the importance for the environment. Stop people from telling you we 'have to' degrade the environment to live on this planet. To say so is just someone's ignorance of our options to settle for an ongoing bad material history when we can have now a much better material future--and a durable cultural memory for the species at last.


Superman 'memory crystals' to become a reality as scientists store computer data on powerful glass hard drive
By Daniel Bates
15th August 2011

Computer users could soon be saving their work onto hard drives made of glass after scientists developed ‘memory crystals’ similar to those in the Superman films.

Researchers have used laser beams to alter glass and make it possible to store memory inside, just as Clark Kent does in his Fortress of Solitude.

They say the crystals will be able to store much more than conventional hard drives and are less prone to overheating or damage.

Poweful memory database: The process works by putting tiny dots called 'voxels' into pure silica glass which changes the way light moves through it

At home: Researchers have used laser beams to alter glass and make it possible to store memory inside, just as Clark Kent does in his Fortress of Solitude

Currently the glass shards can store up to 50GB of data, the equivalent of a whole Blu-ray Disc, on a piece the size of a mobile phone screen.

They can also withstand temperatures of up to 1,800F and last for thousands of years without the quality of the data stored degrading.

The process works by putting tiny dots called ‘voxels’ into pure silica glass which changes the way light moves through it.

These voxels can then be read using an optical decoder, allowing the user to write or delete data as often as they like.

Lead research Martynas Beresna, of Southampton University's optoelectronics research centre, said: ‘We have developed this memory which means data can be stored on the glass and last for ever. It could become a very stable and safe form of portable memory.

‘It could be very useful for organisations with big archives. At the moment companies have to back up their archives every five to ten years because hard-drive memory has a relatively short lifespan.

‘Museums who want to preserve information or places like the national archives where they have huge numbers of documents, would really benefit.'

The researchers are now working with a Lithuanian company to market the crystals.

In the Superman film series, the Fortress of Solitude was created by a crystal placed aboard a spacecraft Superman is put on to escape the war on his home planet of Krypton.

The teenage Clark Kent ends up in an ice field thought to be in the Arctic and when he throws it into the floor it becomes a cavernous crystal complex.

The memory crystals contain holograms and sound recordings of Superman’s parents Jor-El and Lara which are accessed by placing a glass ‘memory stick’ into a glass pipe.

http://www.dailymail.co.uk/sciencetech/article-2026274/Superman-memory-crystals-reality-scientists-store-data-powerful-glass-hard-drive.html

What about graphene?


What is Graphene?
6 min.


Ideas of flexible graphene:
2 min.


The wonder stuff that could change the world: Graphene is so strong a sheet of it as thin as clingfilm could support an elephant

By David Derbyshire
Last updated at 7:39 AM on 7th October 2011

Revolutionary: Graphene, which is formed of honeycomb pattern of carbon atoms, could be the most important new material [transparent, electric, and strong building material as well] material for a century [it's a completely unique mixture of consumptive categories in this material: a thin, transparent, super-strong (harder than diamond) structural building material that has electrical conduction properties better than copper (copper is hardly a structural material), though graphene's lack of semiconductor principles may make it difficult for some fantasy computer operations that currently are based on mostly silicon's physical capacities of 'on/off' switching in the material itself (there are other options for this switching though than polluting silicon industries: see the category on communication materials for more options); thus with graphene always 'on' in other words, and very efficiently so, it makes it difficult to do any anticipated Boolean/operations in the material itself in base 2--the insight of all computers from Shannon onward.]

Revolutionary: Graphene, which is formed of honeycomb pattern of carbon atoms, could be the most important new material for a century

It is tougher than diamond, but stretches like rubber. It is virtually invisible, conducts electricity and heat better than any copper wire and weighs next to nothing. Meet graphene — an astonishing new material which could revolutionise almost every part of our lives.

Some researchers claim it’s the most important substance to be created since the first synthetic plastic more than 100 years ago.

If it lives up to its promise, it could lead to mobile phones that you roll up and put behind your ear, high definition televisions as thin as wallpaper, and bendy electronic newspapers that readers could fold away into a tiny square.

It could transform medicine, and replace silicon as the raw material used to make computer chips [perhaps everything except this however, see note above.]

The ‘miracle material’ was discovered in Britain just seven years ago, and the buzz around it is extraordinary.

Last year, it won two Manchester University scientists the Nobel Prize for physics, and this week Chancellor George Osborne pledged £50 million towards developing technologies based on the super-strong substance.

In terms of its economics, one of the most exciting parts of the graphene story is its cost. Normally when scientists develop a new wonder material, the price is eye-wateringly high.

But graphene is made by chemically processing graphite — the cheap material in the ‘lead’ of pencils. Every few months researchers come up with new, cheaper ways of mass producing graphene, so that some experts believe it could eventually cost less than £4 per pound.

But is graphene really the wonder stuff of the 21st century?

For a material with so much promise, it has an incredibly simple chemical structure. A sheet of graphene is just a single layer of carbon atoms, locked together in a strongly-bonded honeycomb pattern.

Pledge: George Osborne, pictured visiting the University of Manchester lab where graphene is being researched, has said £50m will be set aside to help with development of technologies based on the substance

That makes it the thinnest material ever made. You would need to stack three million graphene sheets on top of each other to get a pile one milimetre high. It is also the strongest substance known to mankind — 200 times stronger than steel and several times tougher than diamond.


A sheet of graphene as thin as clingfilm could hold the weight of an elephant. In fact, according to one calculation, an elephant would need to balance precariously on the end of a pencil to break through that same sheet.

Despite its strength, it is extremely flexible and can be stretched by 20 per cent without any damage.

It is also a superb conductor of electricity — far better than copper, traditionally used for wiring — and is the best conductor of heat on the planet.

But perhaps the most remarkable feature of graphene is where it comes from. Graphene is made from graphite, a plentiful grey mineral mostly mined in Chile, India and Canada.

A pencil lead is made up of many millions of layers of graphene. These layers are held together only weakly — which is why they slide off each other when a pencil is moved across the page.

Graphene was first isolated by Professors Konstantin Novoselov and Andrew Geim at Manchester University in 2004. The pair used sticky tape to strip away thin flakes of graphite, then attached it to a silicon plate which allowed the researchers to identify the tiny layers through a microscope.

Discovery: Professors Andre Geim, left, and Dr Konstantin Novoselov first isolated graphene in 2004. They later won the Nobel Prize for Physics last year

Russian-born Prof Novoselov, 37, believes graphene could change everything from electronics to computers.

‘I don’t think it has been over-hyped,’ he said. ‘It has attracted a lot of attention because it is so simple — it is the thinnest possible matter — and yet it has so many unique properties.

‘There are hundreds of properties which are unique or superior to other materials. Because it is only one atom thick it is quite transparent — not many materials that can conduct electricity which are transparent.’

Its discovery has triggered a boom for material science. Last year, there were 3,000 research papers on its properties, and 400 patent applications.

The electronics industry is convinced graphene will lead to gadgets that make the iPhone and Kindle seem like toys from the age of steam trains.

Modern touch-sensitive screens use indium tin oxide — a substance that is transparent but which carries electrical currents. But indium tin oxide is expensive, and gadgets made from it shatter or crack easily when dropped. Replacing indium tin oxide with graphene-based compounds could allow for flexible, paper-thin computer and television screens. South Korean researchers have created a 25in flexible touch-screen using graphene.

Ancient history: If the development of graphene is successful it will make the iPad and Kindle seem like toys from the age of the steam train

Imagine reading your Daily Mail on a sheet of electric paper. Tapping a button on the corner could instantly update the contents or move to the next page. Once you’ve finished reading the paper, it could be folded up and used afresh tomorrow.

Other researchers are looking at many ways of using graphene in medicine. It is also being touted as an alternative to the carbon-fibre bodywork of boats and bikes [and car tires?] Graphene in tyres could make them stronger.

Some even claim it will replace the silicon in computer chips. In the future, a graphene credit card could store as much information as today’s computers.

‘We are talking of a number of unique properties combined in one material which probably hasn’t happened before,’ said Prof Novoselov. ‘You might want to compare it to plastic. But graphene is as versatile as all the plastics put together.

‘It’s a big claim, but it’s not bold. That’s exactly why there are so many researchers working on it.’

Dr Sue Mossman, curator of materials at the Science Museum in London, says graphene has parallels with Bakelite — the first man-made plastic, invented in 1907.

Resistant to heat and chemicals, and an excellent electrical insulator, Bakelite easily made electric plugs, radios, cameras and telephones.

‘Bakelite was the material of its time. Is this the material of our times?’ she says. ‘Historically we have been really good at invention in this country, but we’ve been really bad at capitalising on it.’

If graphene isn’t to go the same way as other great British inventions which were never properly exploited commercially at home — such as polythene and carbon fibre — it will need massive investment in research and development.

Core material: Graphene comes from a base material of graphite and is so thin that three millions sheets of the substance would be needed to make a layer 1mm thick

That’s why the Government’s move to support its development in the UK got a warm round of applause at the Conservative Party conference.

But compared to the investment in graphene in America and Asia, the £50 million promised by the Chancellor is negligible. South Korea is investing £195million into the technology. The European Commission is expected to invest one billion euros into graphene in the next ten years.

Yet despite the flurry of excitement, many researchers doubt graphene can live up to such high expectations.

It wouldn’t be the first wonder material that failed to deliver. In 1985 another form of carbon, called fullerenes or buckyballs, was hailed as the revolutionary new material of the era. Despite the hype, there has yet to be a major practical application.

And there are already some problems with using graphene. It is so good at conducting electricity that turning it into devices like transistors — which control the flow of electrical currents, so need to be able to stop electricity flowing through them — has so far proved problematic.

Earlier this year computer company IBM admitted that it was ‘difficult to imagine’ graphene replacing silicon in computer chips.

And sceptics point out that most new materials — such as carbon-fibre — take 20 years from invention before they can be used commercial use.

You might think from all the hype, that the road to a great graphene revolution has already been mapped out.

But its future is far from certain. In fact it’s barely been penciled out in rough.

Read more: http://www.dailymail.co.uk/sciencetech/article-2045825/Graphene-strong-sheet-clingfilm-support-elephant.html#ixzz1aMt2nBVJ


3.

Quantum computer built inside a diamond
April 4, 2012

Diamonds are forever – or, at least, the effects of this diamond on quantum computing may be. A team that includes scientists from USC has built a quantum computer in a diamond, the first of its kind to include protection against "decoherence" – noise that prevents the computer from functioning properly.

The demonstration shows the viability of solid-state quantum computers, which – unlike earlier gas- and liquid-state systems – may represent the future of quantum computing because they can be easily scaled up in size. Current quantum computers are typically very small and – though impressive – cannot yet compete with the speed of larger, traditional computers.

The multinational team included USC Professor Daniel Lidar and USC postdoctoral researcher Zhihui Wang, as well as researchers from the Delft University of Technology in the Netherlands, Iowa State University and the University of California, Santa Barbara. Their findings will be published on April 5 in Nature.

The team's diamond quantum computer system featured two quantum bits (called "qubits"), made of subatomic particles.

As opposed to traditional computer bits, which can encode distinctly either a one or a zero, qubits can encode a one and a zero at the same time. This property, called superposition, along with the ability of quantum states to "tunnel" through energy barriers, will some day allow quantum computers to perform optimization calculations much faster than traditional computers.

Like all diamonds, the diamond used by the researchers has impurities – things other than carbon. The more impurities in a diamond, the less attractive it is as a piece of jewelry, because it makes the crystal appear cloudy.

The team, however, utilized the impurities themselves.

A rogue nitrogen nucleus became the first qubit. In a second flaw sat an electron, which became the second qubit. (Though put more accurately, the "spin" of each of these subatomic particles was used as the qubit.)

Electrons are smaller than nuclei and perform computations much more quickly, but also fall victim more quickly to "decoherence." A qubit based on a nucleus, which is large, is much more stable but slower.

"A nucleus has a long decoherence time – in the milliseconds. You can think of it as very sluggish," said Lidar, who holds a joint appointment with the USC Viterbi School of Engineering and the USC Dornsife College of Letters, Arts and Sciences.

Though solid-state computing systems have existed before, this was the first to incorporate decoherence protection – using microwave pulses to continually switch the direction of the electron spin rotation.

"It's a little like time travel," Lidar said, because switching the direction of rotation time-reverses the inconsistencies in motion as the qubits move back to their original position.

The team was able to demonstrate that their diamond-encased system does indeed operate in a quantum fashion by seeing how closely it matched "Grover's algorithm."

The algorithm is not new – Lov Grover of Bell Labs invented it in 1996 – but it shows the promise of quantum computing.

The test is a search of an unsorted database, akin to being told to search for a name in a phone book when you've only been given the phone number.

Sometimes you'd miraculously find it on the first try, other times you might have to search through the entire book to find it. If you did the search countless times, on average, you'd find the name you were looking for after searching through half of the phone book.

Mathematically, this can be expressed by saying you'd find the correct choice in X/2 tries – if X is the number of total choices you have to search through. So, with four choices total, you'll find the correct one after two tries on average.

A quantum computer, using the properties of superposition, can find the correct choice much more quickly. The mathematics behind it are complicated, but in practical terms, a quantum computer searching through an unsorted list of four choices will find the correct choice on the first try, every time.

Though not perfect, the new computer picked the correct choice on the first try about 95 percent of the time – enough to demonstrate that it operates in a quantum fashion.

Provided by University of Southern California

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http://phys.org/news/2012-04-quantum-built-diamond.html#firstCmt