Ker Than
LiveScience Staff Writer
LiveScience.com
2 hours, 6 minutes ago
Fully merging microbe and machine for the first time, scientists have created gold-plated bacteria that can sense humidity.
The breakthrough is the first "cellborg" in what might become an array of devices that could sense dangerous gases or other hazardous substances.
The bioelectronic device swells and contracts in response to how much water vapor is in the air. It’s called a cellborg humidity sensor, and it is at least four times more sensitive than those that are solely electronic. It even works even when its biological parts are long dead.
How it was made : Scientists first coated a silicon chip with a layer of live Bacillus cereus bacteria. Some of the long, rod-shaped microbes lodged between two etched electrodes on the chip’s surface, forming a bridge. The chip was then washed in a solution containing tiny gold particles, each one about 30 nanometers across.
http://news.yahoo.com/s/space/20051027/sc_space/microbeandmachinemergedtocreatefirstcellborg