Nanowires 10,000 times thinner than hair!

Researchers at ARC Centre of Excellence for Quantum Computation and Communication Technology at the University of New South Wales, in Sydney, Australia have created a new nanowire that is 10,000 times smaller than human hair and yet having very good electrical properties.

"Interconnecting wiring of this scale will be vital for the development of future atomic-scale electronic circuits," says the lead author of the study, Bent Weber

Head here if you want to read more on this and do note that unless you have basic knowledge of electronics, this will be greek-and-latin for you.

Few links that might help you understand a bit about nanowires:
How nanowires work
Nano circuitry

Source1
Source2