| Topic | Author | Replies | Last Post |
|---|---|---|---|
| My Opinon is No! |
 Twilight of
|
0 | July 18, 2009 |
| Weigh in... your opinion, that is |
Feiruz
|
0 | June 5, 2008 |
| Donate to Foresight deadline Sunday |
Killa Cham
|
1 | December 29, 2006 |
| Telomolecular Corp |
Killa Cham
|
1 | July 13, 2006 |
| C-R-Newsletter #38 |
Mike
|
0 | March 1, 2006 |
Nano in action: NASA's Aerogel
"To collect particles without damaging them, Stardust uses an extraordinary substance called aerogel. This is a silicon-based solid with a porous, sponge-like structure in which 99.8 percent of the volume is empty space. By comparison, aerogel is 1,000 times less dense than glass, which is another silicon-based solid. When a particle hits the aerogel, it buries itself in the material, creating a carrot-shaped track up to 200 times its own length. This slows it down and brings the sample to a relatively gradual stop. Since aerogel is mostly transparent - with a distinctive smoky blue cast - scientists will use these tracks to find the tiny particles." - from www.nasa.gov/mission_pag...l-index.html
Advertisement
more photos in Responsible Nanotechnology
|
|
Advertisement