Stories tagged gold nanoshells

Nov
19
2010

Glowing Trees
Glowing TreesCourtesy This image, which was originally posted to Flickr, was uploaded to Commons using Flickr upload bot on 09:48, 21 July 2008 (UTC) by Manoillon (talk). On that date it was licensed under the Creative Commons Attribution 2.0 Generic license.
Bioluminescence. Think fireflies. Or anglerfish. Or your friendly neighborhood boulevard tree. Wha? Yep. Recently the Royal Society of Chemistry published (and gave their royal thumbs-up to) Dr. Yen-Hsun Wu’s paper in which he describes eliminating the need for energy-sapping streetlights by injecting trees with gold nanoshells.

According to inhabitat (design will save the world):

By implanting the gold nanoparticles into the leaves of the Bacopa caroliniana plants, the scientists were able to induce the chlorophyll in the leaves to produce a red emission. Under a high wavelength of ultraviolet light, the gold nanoparticles were able to produce a blue-violet fluorescence to trigger a red emission in the surrounding chlorophyll.

Popular Science is just as psyched:

This ingenious triple threat of an idea could simultaneously reduce carbon emissions, cut electricity costs and reduce light pollution, without sacrificing the safety that streetlights bring.

Creepy? Cool? You decide.

Nov
12
2010

Gold. Pretty, pretty, cancer-annihilating gold. Wait, what? Yep, you read that right. Gold nanoshells are proving themselves mighty effective at killing cancer .

So here’s the process in an overly-simplified nut(nano?)shell –

1. Gold nanoshells are injected into the body.
2. The shells travel the bloodstream and seep into the tumor via the leaky blood vessels that feed it (your other blood vessels are nice and tightly woven).
3. The shiny new gold-nanoshell-infused-tumor is heated with infrared light (the same light that powers your remote controls at home) for about twenty minutes.
4. The gold-nanoshell-infused-tumor gets cooked to a dead crisp, while your healthy cells remain intact and healthy.

Great news if you’re a lab rat and you’re looking to stick around for more experiments since, so far, their studies with lab rats have been 100% effective in killing the cancer.

Also great news (mostly) if you’re a human and you’re looking for a possible cure for cancer that doesn’t involve getting horrendously sick from chemotherapy or radiation therapy.

Why “mostly?” Well, because there are Gold Nugget
Gold NuggetCourtesy United States Geological Survey
few questions that ought to be asked:

1. What happens to the rest of the gold nanoshells that don’t make it to the tumor? Are they absorbed by the body? Are they processed by the liver and then passed?
2. If they’re passed through the body via the liver, what happens to them once they’re in our waste-water treatment facilities?
3. What affect do they have on the environment?
4. If the treated water makes it back to our drinking water – will we be consuming gold nanoshells without our knowledge? What then?

It’s very easy to get all rah-rah-sis-boom-bah! about exciting new cancer treatments because we all want it so badly. But it’s also important to ask the difficult questions upfront, so that we’re not facing any nasty surprises down the road (asbestos, anyone?). Meanwhile, I’ll be quietly flying my gold nanoshell flag. Go, fight, win!