Chinese makers of the silicon wafers that conduct electricity directly from sunlight proliferated and prospered.
The concentration of metal as little as 2% by volume is low enough not to constrain the material's elasticity, but high enough to conduct electricity.
That means that a whole range of polymers which do not conduct electricity (such as most common plastics) can be brought into play.
Superconductors are materials that, when cooled sufficiently, conduct electricity without resistance.
Although the fibre in question could not conduct electricity, the same technique should work with conductive molecules, which could serve as minute diodes and other circuit components.
Only a few polymers, however, conduct electricity, and so the range of chemicals that can be detected is limited to those that will react with those polymers.
The fabric Jonathan Engel and Chang Liu have produced has a similar strength to nylon and can conduct electricity thanks to the way it is formed by interlocking rings and rectangles of about 500 microns in width.
In the days of copper-wire telephony, customers would be able to pick up the phone and make calls even if their power went out, because the copper would conduct electricity to power analog phones on the receiving end.
What Rand and his colleagues found is that at the right intensity, when light is traveling through a material that does not conduct electricity, the light field can generate magnetic effects that are 100 million times stronger than previously expected.
The code of conduct requires tenants to pay rent on time, register for council tax, gas, electricity and water in their own names and not to cause excessive noise or anti-social behaviour.
应用推荐