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Technology update

Sep 24, 2008

Atom expulsion shapes nanodevices

Nanodevices can be shaped using a highly focused electron beam. So say researchers at the University of Illinois at Urbana Champaign in the US who have developed a technique called electron-beam expulsion of atoms (EBESA) to etch nanoholes as small as 2.5 nm across in multiwalled carbon nanotubes and niobium nanowires. If improved, the method might be used make single-electron and field-effect transistors, photon and chemical detectors and even superconducting-based solid-state qubits.

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