Tuesday, October 20, 2009

Nanotech for self-cleaning skyscraper windows, electric cars perfected at TAU


Let me tell you, as I move through my house, noticing all the dust and grime and stuff that I need to clean up before my husband gets home this afternoon, I say to this group of scientists, Kol H'Kavod!!

One less thing to clean in the world, one more way to make the batteries in ANYTHING last longer, and one more way to generate electricity so that we can lower the bill is GREAT SCIENCE!!!

(Although, I am convinced, some arab will come along and will say something like, "The Zionist scientists are just trying to get rid of the arab jobs cleaning windows!!"

Yes, of course that is the reason. Now, run along . . .)

I have to say there are a lot of uses I can think of for some nanotechnology that would repel water and dirt . . . if they are having trouble coming up with them, please, give me a call!

Here is my short list:
  1. making a spray I can use to coat my children's shoes, clothes, hats, gloves;
  2. spraying the bottom of boats to make them move through the water better and to keep them from collecting barnacles and other nasties;
  3. coating electronic equipment that gets ruined when it gets wet (like my cell phone, my son's iPod, etc.),
  4. making storm-gear and boots . . .
I'm going to be thinking about this all week!


TAU unveils nanotech for self-cleaning skyscraper windows, electric cars

Self-cleaning skyscraper and car windows and solar panels that repel water and dirt, as well as high-power rechargeable batteries for electric vehicles could be some of the major applications of a Tel Aviv University nanotechnology discovery announced on Sunday evening.

The development of arrays of self-assembling peptide (protein) nanotubes was the work of Prof. Ehud Gazit of the university's department of molecular microbiology and biotechnology, together with his team of Lihi Adler-Abramovich, Daniel Aronov, Peter Beker, Maya Yevnin, Shiri Stempler, Ludmilla Buzhansky and Gil Rosenman, some of the department of physical electronics. Their innovation appears in the prestigious journal, Nature Nanotechnology.

Gazit was abroad on Sunday, but Adler-Abramovich - who is completing her doctorate in his lab - told The Jerusalem Post that the team has been working on nanotubes for six years and this specific project for two. "We thought of applications when we started, but the results were so impressive during our research that we added more," she said.

Nanotechnology is the study of the control of matter on an atomic and molecular scale and involves structures sized 100 nanometers - each one-billionth of a meter - or smaller.

A very short and inexpensive peptide chain comprised of only two amino acids and easy to synthesize in mass production is the basis of the technology.

"The self-assembly is carried out under high temperatures and in a vacuum. The peptide is as simple as that of aspertame, the artificial sweetener, she said. The nanotubes have the amazing characteristic of assembling themselves to look like "forests" of artificial grass and are hydrophobic, which means that they repel water, as well as dust particles.

Thus, sealed, exterior windows of skyscrapers - which are difficult to clean unless someone rapels up them - would not attract dust, and when it rained, any residual dirt would just drop off without leaving a trace. Solar energy panels made of glass, whose efficiency is greatly reduced by dust because the solar radiation has to filter through, could repel dust if made of ordinary glass with the nanotech coating, said Adler-Abramovich.

Solar-energy "farms" in the desert where there is no rain would be able to repel dust to increase efficiency. If they need to be perfectly clean, a small spray of water on the glass could remove the dirt completely without anyone cleaning them, she said.

The new technology would apparently put window washers out of work.

She said that another application for the nanotubes would be super capacitators that arrange themselves in great density to produce a rechargeable electric battery storing . . . [MORE]

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