Researchers from the Swiss Federal Institute
of Technology and the University of California have devised a way to write
stripes of gold onto glass to produce microscopic wires.
The researchers' prototype has produced continuous gold stripes
as narrow as five microns wide and a few tenths of a micron high. A micron
is one-thousandth of a millimeter.
The current prototype has the potential to write features on the
order of a single micron wide, according to the researchers. A micron
is about 75 times narrower than a human hair. This is about ten times
narrower than microstructures produced using inkjet printing techniques,
according to the researchers.
The method could eventually be used manufacture conductors for
tiny electronics devices.
The method calls for using a micropipette to write liquid that
contains suspended gold nanoparticles on glass, then using a laser to
evaporate the liquid and sinter the nanoparticles together. The tricky
part was working out the optimum laser intensity and focus, and the optimum
scanning speed, according to the researchers.
The researchers are working on improving the system to write stripes
as narrow as 100 nanometers, which is 750 times narrower than a human
The method could be used practically in two to five years, according
to the researchers. The work appeared in the July 5, 2004 issue of Applied
Projector lights radio
Cell phone melds video
Sound system lets
Chips measure electron
Twisted fiber filters
bring walking to VR
Speck trios make
Single gold atoms
Pen writes micro wires
Design eases nano
View from the High Ground Q&A
How It Works
News | Blog
Buy an ad link