Sunday, September 26, 2010

Here comes Graphene... sharpen your pencils!

Reading about research and development around carbon-based, two dimensional, nano-worldly Graphene has been a lot of fun. If you're just ramping up as well, I thought I'd jot down some of my collected notes to help others on their way to good knowledge of Graphene.

First of all, Graphene is a one atom thick, 2-D slice of graphite, the "pure" stuff in your 2H pencil. It looks like a cross-section of a honey-comb with carbon atoms in a chicken wire-like pattern. Scribble on a piece of paper, take some scotch tape and left up your carbon-based jottings. Then desolve the tape with a solvent, like Benzene, and you're left with a few (or more) layers called Graphene.

Now, some tidbits or "reasons to care"...

  1. Graphene is the strongest material known.
  2. It's the thinnest membrane known, in the lab, to separate two bodies of liquids.
  3. Pop a hole in a sheet of Graphene a few carbon atoms wide, you have a "nanopore". Drag a strand of DNA through it, you can figure out its sequencing (all that G, T, C A stuff). FAST.
  4. Thanks to its incredible conductivity, it may eventually replace silicon as chip fodder. It's 100x more conductive than silica and isn't it nice it's not environmentally toxic as those other silica alternatives, like gallium arsenide?
  5. As part of the quest to utilize Graphene as laid on substrates of silica, researchers are working heavily on getting the signal-to-noise ratio ramped up to maximize all that good conductivity.
  6. Nanotubes are rolled up single layer sheets of Graphene.
  7. Because of its high conductivity, Graphene makes great sensor devices, able to detect substances and get the word out quickly.
  8. Graphene may represent a new class of capacitors, thanks to its conductivity and extremely large ratio of surface area to mass.

Lost the article I grabbed some of these details from. I'll post the link as soon as I find it. The bit about nanopores came from http://www.physorg.com/news203345672.html

Hope you found this helpful and now see Graphene as slightly less mystifying.

1 comment:

Unknown said...

check out cool graphene pictures at http://www.wired.com/wiredscience/2010/10/graphene-gallery/