0527_VO2_b1-sml [Reversible doping: Hydrogen flips switch on vanadium oxide]

Gold electrodes rest on clumps of vanadium oxide (VO2) wires that are each about 1,000 times smaller than a human hair. When baked in the presence of hydrogen gas, the wires next to the electrodes (dark region) absorb hydrogen and exhibit altered electronic behavior.

About Jade Boyd

Jade Boyd is science editor and associate director of news and media relations in Rice University's Office of Public Affairs.