Researchers devise a way to a create graphene transistor

Discussion in 'Science and Technology' started by Matthew, Jul 19, 2012.

  1. Matthew
    Online

    Matthew Blue dog all the way!

    Joined:
    Mar 16, 2010
    Messages:
    49,763
    Thanks Received:
    4,612
    Trophy Points:
    1,885
    Location:
    Portland Oregon
    Ratings:
    +15,229
    Researchers devise a way to a create graphene transistor
    July 18, 2012 by Bob Yirka Enlarge

    Two different epitaxial graphene materials combined to a monolithic transistor. (Phys.org) -- Researchers in Germany appear to have found a way to create a monolithic (integrated) graphene transistor, using a lithographic process applied to silicon carbide, a breakthrough that could lead to computers based on graphene chips, rather than those that use silicon. This is significant because researchers are beginning to see the light at the end of the tunnel regarding the degree to which silicon can be used to make smaller and smaller chips. Using graphene wouldn’t necessarily allow for smaller chips, but because it conducts electricity faster, it would allow for faster chips without having to downsize. The German researchers working with another group from Sweden, describe the new process in their paper published in the journal Nature Communications. google_protectAndRun("render_ads.js::google_render_ad", google_handleError, google_render_ad);Ads by GoogleAvnet Express - World's Largest Distributor of Components w/ 5 M Parts Online. - AvnetExpress.Avnet.com By now everyone has heard that graphene is expected to take the world by storm over the next few years as ways are found to make use of its amazing properties (it’s just one carbon atom thick and is the fastest conductor ever found). The problem of course is in trying to work with such a thin material; it’s hard to connect to other metals such as electrodes and breaks easily. Another problem is that it’s not a natural semiconductor, which is a material that is conductive in one state and to not conductive in another.

    Semiconductors are what allow computers to store “1s” and “0s”. Thus, to use graphene in a computer, a way needs to be found to allow it to behave as a semiconductor so that transistors can be fashioned. That way appears to have now been found. The new research is based on earlier research that found that if the crystal, silicon carbide is baked just right, the silicon atoms on its surface are pushed out of it leaving just a single layer of carbon, i.e. graphene. The result is a material that suggests a transistor is possible due to the graphene layer remaining affixed to more layers of silicon carbide (which is a semiconductor) below it. To make a transistor, the team used a high energy beam of charged atoms to etch channels into the material to create the parts needed for a transistor to run; namely, gates, drains and sources. They also found that using oxygen gas during the etching of the middle channel converted it from a contact into a gate. The end result is a fully functioning transistor. Because the researchers scaled up the transistor size to allow for easier research, it’s not yet known how much faster the new transistor actually is, or how fast those might be once they are scaled down. What is now known though, is that it can be done, and that is the breakthrough computer engineers have been waiting for. More information: Tailoring the graphene/silicon carbide interface for monolithic wafer-scale electronics, Nature Communications 3, Article number: 957 doi:10.1038/ncomms1955

    Read more at: Researchers devise a way to a create graphene transistor
     
  2. editec
    Offline

    editec Mr. Forgot-it-All

    Joined:
    Jun 5, 2008
    Messages:
    41,427
    Thanks Received:
    5,598
    Trophy Points:
    48
    Location:
    Maine
    Ratings:
    +5,618
    Read recently that the CARBON used to make this miracle graphene comes from CO2.

    Techologicaly advances are coming fast and furious.


    Now if we could only find a way to make these technological advances serve us all, eh?
     
  3. JimBowie1958
    Offline

    JimBowie1958 Old Fogey

    Joined:
    Sep 25, 2011
    Messages:
    39,343
    Thanks Received:
    5,506
    Trophy Points:
    1,170
    Location:
    Fredericksburg, VA
    Ratings:
    +21,477

    So, they TOO contribute to Global Warming?

    Heartless basterts!
     

Share This Page