Teeny, tiny tech
By Drew Wilson
SPECIAL TO THE WASHINGTON TIMES
Developments are under way that could wipe batteries off the face of
the Earth. Researchers at the Oregon Nanoscience and Microtechnologies
Institute (ONAMI), a consortium of Oregon educational institutions, say
they have made significant breakthroughs in a power source that
essentially turns 20 pounds of batteries into 8 ounces of fuel the size
of a cigarette lighter.
The immediate aim is to use nanotechnology — science on the tiniest
scale — to replace cumbersome military batteries and eventually power
everything "from cell phones up to systems that run a tank," said Kevin
Drost, ONAMI's co-director of research.
A nanometer is one-billionth of a meter. By comparison, a human
DNA molecule is 2.5 nanometers wide and a cold virus is about 20
nanometers. Scientists have found that matter this small behaves
differently than larger particles, meaning perhaps monumental changes
ahead.
So far, spill-resistant jeans and stronger tennis rackets have been
trotted out as nanotech wonders. Now defense-related projects are
beginning to bear fruit.
ONAMI's pocket-power source is good news for soldiers who carry
equipment such as night-vision technology, communications and a Global
Positioning System unit and burn through batteries daily. Batteries are
not only heavy, but they present a supply-chain challenge because
soldiers need frequent shipments for replenishment in remote locations.
ONAMI researchers say they have bypassed that problem by developing
nanotechnology liquid-fuel cells.
Their first working prototype for the fuel cells is in conjunction
with a portable air-conditioning system that will keep a soldier cool in
hot climates. The unit runs on hydrocarbon fuel and will be the size of
a paperback book weighing about 3.5 pounds.
Mr. Drost said the system is not pie in the sky; a usable unit will
be ready in three to five years.
Nanotechnology-structured products are attractive to the military
because they can shrink equipment while boosting its performance,
according to Mihail Roco, the National Science Foundation's senior
adviser on nanotechnology.
"Nanotechnology offers advantages of smallness, speed and complexity
that was not possible before," he said.
Nanotech-based sensors that detect anthrax molecules before they
become a threat are already being used in Iraq, Mr. Roco said, though he
wouldn't give details.
"As these products move into production, they become classified."
ONAMI's nano-based battery alternative is one result of $24 million
in nanotech funding won in 2003 from sources such as the Defense
Advanced Research Projects Agency, the National Science Foundation and
the Office of Naval Research. The consortium is part of Oregon's
"Silicon Forest," a cluster of high-tech research and development
institutions that represents the state's ambition to join leaders
California, Massachusetts, Illinois and Texas.
ONAMI has a $21 million annual budget from the Oregon legislature
and relies on the work of about 70 researchers. It hopes to win a chunk
of the $3.7 billion 21st Century Nanotechnology Research and Development
Act signed by President Bush in December 2003.
Skip Rung, ONAMI's executive director, said engineers design and
modify tiny fractal structures referred to as "microchannels," passages
the width of a human hair or smaller. Once optimized in the required
way, the microchannels greatly accelerate energy and chemical processes.
Optimized microchannels also can convert vegetable oils into diesel
fuel. Soon a field of soybeans or agricultural products could be
converted to diesel fuel to run a tank, officials said.
Nanotech also could mean big savings. James Murday, chief scientist
at the Office of Naval Research, said a nanotech-based structural
coating for naval vessels starting to be used could save $100 million
per year because of improved friction wear.
"Without question nanotech is very important for the military and
most of the nanotech-based products in the defense area haven't arrived
yet," Mr. Murday said.
Nanotechnology is often viewed as a radical science that will bring
monumental changes. Practical results, however, have been mainly new and
improved consumer products, suggesting the technology has been hyped.
Mr. Roco, nonetheless, has a sweeping vision of nanotechnology
helping industries globally. The NSF has predicted that worldwide
nanotechnology-based applications will be worth $1 trillion per year by
2015.
"Nano is also entering, very fast, biology and medicine and we will
start to have significant applications such as increasing human
performance," he said.
Creating organ replacements has been the goal of many nanotech
researchers. ONAMI is within three years of completing a kidney dialysis
machine small enough to carry, and officials believe it can eventually
be reduced enough to replace a kidney entirely.
At the Massachusetts Institute of Technology and Harvard Medical
School, scientists have made a tiny, functioning vascular system, which
is considered a big step in making whole organs.
Nanotechnology has been seen by some as a potentially dangerous
development that could spin out of control.
But Mr. Rung, said the potential danger is equivalent to a chemical
spill.
Nanoscale particles generally have increased toxicity because they
are highly reactive. To eliminate hazards, Oregon institutions are
working on benign versions of nanoparticles that contain cellulose and
biodegrade in six months. ONAMI is developing a portable factory where
nanoparticles are made in microreactors exactly where they are needed.
"It completely eliminates the dangers of making them in a factory in
one place and shipping to the point of use," Mr. Drost said.
Portable factories also have space applications. Mr. Drost said
researchers in Oregon are designing a system to make rocket fuel on Mars
so the fuel doesn't have to be brought. If successful, spacecraft would
weigh less, have simpler design, reduced dangers and lower cost.
Copyright 2005 News
World Communications, Inc.
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