The Nanotech BC Blog: Tougher Armor through Carbon Nanotubes

I suppose that it's inevitable that one of the first showcases for new technology is weapons. It's slightly more comforting to see that some of the new materials nanotechnology is enabling are meant to protect lives instead of kill them.

The BBC news has a good article on how carbon nanotubes are being used to create "future fibres" for use within body armor.

"Our fibre is up there with the existing high performance bibres such as Kevlar", said Professor Windle. But he added: "We've seen bits that are much better than Kevlar in all respects."

The article also has a good section explaining the process of making the super-strong material. They've convinced me that what there producing has a lot of promise, but there are a few conspicuous and unanswered questions: How much does it cost to produce, and how scalable is the manufacturing process?

The Nanotech BC Blog: Plastic? Steel? Both!

We're really just playing catch up with nature, aren't we?

Apparently, by mimicking the layered molecular grid of seashells scientists at the University of Michigan have created a new, biodegradable plastic-like material that's transparent and hard as steel.

The most impressive thing about this advance is that the researchers have managed to live up to the promise of nanotechnology -- realizing the remarkable strength of their nanoscale building-blocks at the macroscale.

Of course, as always there are questions that need to be asked. How expensive is it to create this material? How hard is it going to be to scale it up to economically viable production? This new material is a significant achievement, but the real success will come when we're using it in practical ways.

The Nanotech BC Blog: Coming Soon to a Fruit Fly Larvae Near You

The intersection of nanotechnology and biology are attracting a lot of interest for many good reasons. On the one hand nanotech seems to promise new ways of curing disease and promoting health. On the other, nobody seems very sure of the extent that nanoparticles or nanotubes are harmful.

Now the brave fruit fly looks like it's about to find out:

Nanotubes Imaged In Fruit Fly Larvae

Using near-infrared fluorescence imaging, scientists at Rice University have managed to sneak a peek at single-walled carbon nanotubes (SWNTs) inside the bodies of living fruit fly larvae (Nano Lett. 2007, 7, 2650). It's the first time anyone has observed carbon nanotubes inside a living creature, according to principal investigators Kathleen M. Beckingham and R. Bruce Weisman, who think the technique could be useful for diagnosing diseases. The Rice team first fed Drosophila melanogaster larvae a steady diet of water-solubilized SWNTs. The researchers then used a near-infrared microscope and special camera to image SWNTs without harming the larvae. Neither the adult flies' viability nor their growth was reduced by ingesting the tubes. They also found that a small fraction—approximately 10^-8—of the ingested nanotubes were incorporated into the flies' organs, which suggests that SWNTs may have a negligible physiological impact on the insects.

Personally, I'm not planning on ordering a nanotube cocktail any time too soon no mater how much the flies liked it -- but the lack of damage to the larvae seems like a hopeful sign. Nanoparticles are part of the environment every time you burn a candle, but there is a strong possibility that the type and amount of nanomaterials we will all be exposed to will change.