|
Cornell News: Attogram mass detection (936 words) |
 | An attogram is one-thousandth of a femtogram, which is one-thousandth of a picogram, which is one-thousandth of a nanogram, which is a billionth of a gram. |
| The dots then were exposed to a sulfur-based organic chemical that naturally binds to gold, which formed a single layer of a few hundred molecules on the surfaces of the dots. |
| The sensitivity is such that the devices could be used to detect and identify DNA molecules, proteins and other biological molecules by coating the cantilevers with appropriate antibodies or other materials that would bind to the targets. |
Feeds |
Contact