carbon

A Paper Stronger than Steel

The next generation of electronics, airplanes and could be made out of incredibly strong "buckypaper"

Imagine flying an airplane, watching a television or using a laptop computer made, at least in part, from a paper 500 times stronger and 10 times lighter than steel. It's no ordinary paper; it's "buckypaper"—a nanotechnology material that looks like carbon paper and is made out of tube-shaped carbon molecules 50,000 times thinner than a human hair. The material's strength, however, comes when it's stacked and pressed together to form a composite, giving it the ability to conduct electricity like copper and disperse heat like steel.

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The Breakdown

When Is Carbon an Electrical Conductor?

Just ask this poor pencil


And the $64,000 question is ... does graphite conduct electricity? It certainly does! The video demonstration displays this quite convincingly. Graphite is an interesting material, an allotrope of carbon (as is diamond). It displays properties of both metals, and nonmetals. However, like a metal, graphite is a very good conductor of electricity due to the mobility of the electrons in its outer valence shells.

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EarthTalk

Measuring Carbon Footprints

How big is yours?

Dear EarthTalk: How can I measure -- and then improve -- my overall "carbon footprint?" What are the major areas of one's daily life that one measures? -- Andy Fusco, Passaic, NJ

With global warming dominating so many headlines today, it's no surprise that many of us are looking to reduce the amount of carbon dioxide and other greenhouse gases our activities produce.

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Permafrost Contains Vast Store of Carbon

A thaw could release a flood of greenhouse gases

With so much focus on sea ice and ice shelves, the role of permafrost in the global climate cycle is often not on the public's radar screen. But according to a new study published last week in the journal Bioscience, permafrost in the Northern Hemisphere contains more than two times the amount of carbon in the atmosphere, and rapid thawing could make it a significant contributor to global climate change.

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Storms Lower Global Carbon Levels

A new study, which could help scientists model global change more accurately, finds that typhoons bury tons of carbon in the oceans

When typhoons and hurricanes sweep through mountainous areas, they cause more than human destruction. They also physically and chemically weather the mountains they pass, taking carbon with them and burying it in the oceans in the form of sediment. This in turn allows the planet to cool. While scientists have long predicted that extreme storms cause such effects, only recently have they been able to measure just how carbon much storms take away: tons.

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December 2009: Best of What's New

In our December issue, Popular Science names the 100 best innovations of the year: bombproof wallpaper, self-parking cars, the fastest helicopter, and 97 more. Plus inventor profiles and videos.

Check out the best of what's new here.

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