Guest guest Posted June 27, 2003 Report Share Posted June 27, 2003 Oh! am I having fun in their archive(hehehe!) Golden gateway New Scientist vol 172 issue 2316 - 10 November 2001, page 24 Strands of precious metal could provide all the right connections ZAP a bath of water and gold with electricity and you can make tiny wires grow spontaneously. If they break, the strands can even fix themselves—which could make them perfect for connections between implants and living tissue(s). (tell me what do you think would happen to your body with this flowing thru it??? think about it! why is gold so important to some people that securing enough for their future generations is their only goal, hell they tricked everyone into thinking that wood was more valuable than gold!! gold to fix the body maybe?? ) This weird wire effect was discovered accidentally by Jacob Williams while he was a student doing summer work in Orlin Velev's lab at the University of Delaware. Williams, now at Carnegie Mellon University, was experimenting with chunks of latex and gold nanoparticles in a box of water sandwiched between two metal electrodes. When he applied a voltage, he expected the latex to act as a scaffold, holding the gold together in a bridge. But to his surprise, the gold started forming a wire between the electrodes all on its own, sprouting small branches as it traversed the gap. When the power was turned off, the strand stayed in place. This isn't the first time researchers have made gold link up into a chain. But those previous experiments involved bigger, millimetre-sized particles which stuck together because of the electrostatic attraction between the opposite charges that develop in an electric field. When the current was turned off, the chain flew apart. Velev reckons smaller particles of gold just nanometres wide won't attract each other strongly enough to accumulate this way. What's happening instead, he says, is that the gold particles are drawn to places inside the box where the electric field changes the most. Even the tiniest bump on the surface of an electrode reduces the distance to the opposite electrode and increases the strength of the electric field at that point. As gold particles are drawn into the stronger electric field gradient, they get so close that attractive van der Waals forces stick them together. So they stay stuck together. "It's not some mysterious process once you know what's going on, but you wouldn't expect it," says Velev. The wires are self-repairing: a tiny break in the chain warps the electric field, herding in more metal to fill the gap. The same trick works with silver dust and should work with other particles. The team also found they could make wires leapfrog between islands of conducting carbon inside the box, forming a network of circuitry. They hope that one day they could connect implants to living cells in this way. "Eventually you'll want to do this in medical systems," says Velev. For now, Velev thinks their most likely potential use is as chemical sensors. When gold adsorbs a contaminant like cyanide, its resistance changes. Since the wires are very porous and have a huge surface area because of their branching fronds, he says they should be able to detect very small amounts of chemicals. Making tiny wires grow spontaneously Nicola Jones karl theis jrvideo field reporterwww.RealityExpander.com Ch.10 TimeWarnerAustin,Texas cell 512 297-9875e-mail: theis888 www.exposureofthetruth.isfamous.com SBC DSL - Now only $29.95 per month! Quote Link to comment Share on other sites More sharing options...
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