Japanese team finds material that could make super disc

A Japanese research team has found a material that could be used to make a low-price super disc with data storage capacity thousands of times greater than a DVD, the lead scientist said Monday.

The material transforms from a black-colour metal state that conducts electricity into a brown semiconductor when hit by light, according to Shin-ichi Ohkoshi, chemistry professor at the University of Tokyo.

The material, a new crystal form of titanium oxide, can switch back and forth between the metal and semiconductor states at room temperature when exposed to light, creating an effective on-off function for data storage.

It is "promising as a material for a next-generation optical storage device," Ohkoshi told AFP by telephone.

A material that changes colour with light can be used in storage devices as colours reflect light differently to contain different information.

His team has succeeded in creating the material in particles measuring five-to-20 nanometres (a five-billionth to 20-billionth of a metre) in diameter.

If the smallest particle is used, the new disc could hold more than 1,000 times as much information as a Blu-ray disc, provided that matching data-writing and reading equipment are developed.

A single-layer Blu-ray disc can hold five times as much data as a conventional DVD.

Titanium oxide's market price is about one-hundredth of the rare element - germanium-antimony-tellurium - that is currently used in rewritable Blu-ray discs and DVDs, Ohkoshi said.

"You don't have to worry about procuring rare metals. Titanium oxide is cheap and safe, already being used in many products ranging from face powder to white paint," the professor said.

Ohkoshi said it was not known when a disc with the material would be manufactured and put to practical use, adding that he would start talks with private-sector companies for commercialisation.

The study was published in the advance online edition of the British magazine Nature Chemistry.

ebooks
ebookA delicious collection of 50 meaty main courses
Life and Style
ebookNow available in paperback
Latest stories from i100
Have you tried new the Independent Digital Edition apps?
Independent Dating
and  

By clicking 'Search' you
are agreeing to our
Terms of Use.

ES Rentals

    iJobs Job Widget
    iJobs Gadgets & Tech

    Ashdown Group: IT Project Coordinator (Software Development) - Kingston

    £45000 - £50000 per annum: Ashdown Group: IT Project Coordinator (Software Dev...

    SThree: Trainee Recruitment Consultant - Bristol

    £18000 - £23000 per annum + Uncapped OTE: SThree: SThree Trainee Recruitment C...

    SThree: Trainee Recruitment Consultant - Birmingham

    £18000 - £23000 per annum + Uncapped OTE: SThree: SThree Trainee Recruitment C...

    Guru Careers: Senior Account Manager / SAM

    £30 - 35k: Guru Careers: A Senior Account Manager / SAM is needed to join the ...

    Day In a Page

    General Election 2015: Ed Miliband's unlikely journey from hapless geek to heart-throb

    Miliband's unlikely journey from hapless geek to heart-throb

    He was meant to be Labour's biggest handicap - but has become almost an asset
    General Election 2015: A guide to the smaller parties, from the the National Health Action Party to the Church of the Militant Elvis Party

    On the margins

    From Militant Elvis to Women's Equality: a guide to the underdogs standing in the election
    Amr Darrag: Ex-Muslim Brotherhood minister in exile still believes Egypt's military regime can be replaced with 'moderate' Islamic rule

    'This is the battle of young Egypt for the future of our country'

    Ex-Muslim Brotherhood minister Amr Darrag still believes the opposition can rid Egypt of its military regime and replace it with 'moderate' Islamic rule, he tells Robert Fisk
    Why patients must rely less on doctors: Improving our own health is the 'blockbuster drug of the century'

    Why patients must rely less on doctors

    Improving our own health is the 'blockbuster drug of the century'
    Sarah Lucas is the perfect artist to represent Britain at the Venice Biennale

    Flesh in Venice

    Sarah Lucas has filled the British pavilion at the Venice Biennale with slinky cats and casts of her female friends' private parts. It makes you proud to be a woman, says Karen Wright
    11 best anti-ageing day creams

    11 best anti-ageing day creams

    Slow down the ageing process with one of these high-performance, hardworking anti-agers
    Juventus 2 Real Madrid 1: Five things we learnt, including Iker Casillas is past it and Carlos Tevez remains effective

    Juventus vs Real Madrid

    Five things we learnt from the Italian's Champions League first leg win over the Spanish giants
    Ashes 2015: Test series looks a lost cause for England... whoever takes over as ECB director of cricket

    Ashes series looks a lost cause for England...

    Whoever takes over as ECB director of cricket, says Stephen Brenkley
    Fishing for votes with Nigel Farage: The Ukip leader shows how he can work an audience as he casts his line to the disaffected of Grimsby

    Fishing is on Nigel Farage's mind

    Ukip leader casts a line to the disaffected
    Who is bombing whom in the Middle East? It's amazing they don't all hit each other

    Who is bombing whom in the Middle East?

    Robert Fisk untangles the countries and factions
    China's influence on fashion: At the top of the game both creatively and commercially

    China's influence on fashion

    At the top of the game both creatively and commercially
    Lord O’Donnell: Former cabinet secretary on the election and life away from the levers of power

    The man known as GOD has a reputation for getting the job done

    Lord O'Donnell's three principles of rule
    Rainbow shades: It's all bright on the night

    Rainbow shades

    It's all bright on the night
    'It was first time I had ever tasted chocolate. I kept a piece, and when Amsterdam was liberated, I gave it to the first Allied soldier I saw'

    Bread from heaven

    Dutch survivors thank RAF for World War II drop that saved millions
    Britain will be 'run for the wealthy and powerful' if Tories retain power - Labour

    How 'the Axe' helped Labour

    UK will be 'run for the wealthy and powerful' if Tories retain power