Mechanical engineers at Purdue have filed patents for technologies that eventually could be used to create a device that would cool computer chips by generating lightning and wind on a microscopic level using. The patents arose from a research project funded in part by the National Science Foundation.
The researchers have only demonstrated the idea conceptually, but they assert that it could help future computer builders tackle the growing problem ofin a more reliable way than they could through .
In the Purdue device, an array of carbon nanotubes--long, thin strands of specialized carbon molecules--would be
Meanwhile, the cloud of electrons would be alternatively attracted to and repelled by adjacent electrodes. Alternating the voltages on the electrodes creates a cooling breeze because the moving cloud stirs the air.
"To create lightning, you need tens of kilovolts, but we do it with 100 volts or less," said a statement from Suresh Garimella, a professor of mechanical engineering at Purdue who is working on the device. "In simple terms, we are generating a kind of lightning on a nano-scale here."
The next step for the researchers will be to develop a prototype and examine different materials along with nanotubes that could be used in the device. Several technical problems will also likely have to be resolved before these types of devices, even if made, can be put into computers. Semiconductors, for instance, are wrapped with spark arresters. Static electricity can blow a hole through a chip, and the Purdue device is essentially creating static.
Heat is the chief problem facing semiconductor designers today. Future microprocessors will generate as much heat, proportionally speaking, as a nuclear power plant if solutions are not developed, several researchers have theorized. IBM, Intel and others have already begun inserting energy-conserving technology into their chips.
Several start-ups and established companies are also looking at better heat sinks, which draw heat away from chips and into the atmosphere. Additionally, some companies, such asand Carbon Nanotechnologies, are devising ways to use carbon nanotechnologies in gels that will remove heat from tiny places.