The Smallest Solenoid

May 30, 2005

Nanoscopic wires grown in gold may be the world’s smallest solenoids, according to new theoretical analysis of the structures. Solenoids are typically tubes made of coiled wire. They conduct electricity along the spiraled wires to generate magnetic fields that run the length of their interiors. Solenoids are often important components of circuits and switches in their macroscopic form.

The nanoscopic versions, known as Helical Gold Nanowires (HGN), consist of concentric layers of gold atoms. In the simplest incarnation, a wire only one atom thick is surrounded by a tube of atoms.

The analysis of the HGNs shows that electrical current may spiral around the wires as it travels along the wire length. Considering the size of the wires (0.6 nanometers, or a hundred million times thinner than a human hair), it is likely to be difficult to measure the magnetic fields they produce.

Nevertheless, if confirmed experimentally, the solenoids add yet another tiny component to the list of nanoscopic electronic parts (resistors, transistors, capacitors) needed to construct highly miniaturized circuits and machines.

Publication:
T. Ono and K. Hirose
Phys. Rev. Lett. 94, 206806 (2005), 27 May 2005
link.aps.org/abstract/PRL/v94/e206806

Source: American Physical Society

Explore further: Falcon-inspired drone has legs, will perch and land

Related Stories

Falcon-inspired drone has legs, will perch and land

January 29, 2014

(Phys.org) —Adding legs to drones targeted for observation is the pursuit of a company with roots at MIT Media Lab and NASA. Bhargav Gajjar of Vishwa Robotics in Brighton, Massachusetts, designed the legs for small drones.

All-round safety in car

March 6, 2008

A car body that thinks intelligently and protects its occupants at the crucial moment has been every driver’s dream for a long time. Research scientists in an EU project have developed an intelligent side-impact protection ...

Compact Muon Solenoid magnet reaches full field

September 13, 2006

Scientists of the U.S. Department of Energy/Office of Science's Fermi National Accelerator Laboratory and collaborators of the US/CMS project have joined colleagues from around the world in announcing that the world's largest ...

Recommended for you

Researchers design first artificial ribosome

July 29, 2015

Researchers at the University of Illinois at Chicago and Northwestern University have engineered a tethered ribosome that works nearly as well as the authentic cellular component, or organelle, that produces all the proteins ...

Meet the high-performance single-molecule diode

July 29, 2015

A team of researchers from Berkeley Lab and Columbia University has passed a major milestone in molecular electronics with the creation of the world's highest-performance single-molecule diode. Working at Berkeley Lab's Molecular ...

Researchers build bacteria's photosynthetic engine

July 29, 2015

Nearly all life on Earth depends on photosynthesis, the conversion of light energy into chemical energy. Oxygen-producing plants and cyanobacteria perfected this process 2.7 billion years ago. But the first photosynthetic ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.