The
National Science Foundation (NSF) has awarded $7.5
million over five years to establish the Center for
Probing the Nanoscale (CPN) at Stanford. Kathryn Moler,
associate professor of applied physics and of physics,
and David Goldhaber-Gordon, assistant professor of
physics, will be co-directors. The CPN is one of six
new centers that the NSF is funding to support science
and engineering at the scale of the nanometer-one
billionth of a meter, roughly the size of atoms and
molecules. Through nanoscale advances in manufacturing,
biotechnology, electronics, medicine and more, nanotechnology
may account for a $1 trillion annual market and employ
2 million people within 10 to 15 years, according
to an NSF report.
``There`s a huge effort in
this country in nanoscale research, but we don`t have
the tools,`` Moler said. ``We want to engineer what`s
at the nanoscale. We need to be able to see it, and
we need to be able to handle it in order to engineer
it, and that`s what our center`s all about.``
The CPN, which will have offices
and a teaching lab in the Geballe Laboratory for Advanced
Materials, is a partnership between researchers at
Stanford, IBM and other companies to develop novel
nanoprobes and apply them to answering fundamental
questions in science and technology.
``What`s different about our
[center] is that we`re developing new tools to enable
nanoscale science and technology, and we`re excited
to see what possibilities these tools will open up,``
Goldhaber-Gordon said.
The probes will enhance the
capabilities of the nanotechnology community to observe,
manipulate, measure, image and control nanoscale phenomena.
Researchers hope to develop probes with revolutionary
capabilities, such as mapping a single electron`s
behavior in a semiconductor and controlling a single
electron`s magnetic orientation, or ``spin.``
The probes will help researchers
address questions such as: At what length scale does
quantum mechanical behavior become classical diffusive
behavior? How does the spin state of an electron vary
over time and distance? What are the mechanisms of
high-temperature superconduction?
The center also includes a
summer institute, led by a full-time education director,
to train middle-school teachers and, through them,
inspire tens of thousands of young students. Modeled
after programs at Cornell and Rice universities that
work with high school teachers, the Stanford program
trains teachers who work with younger students. ``By
the time [students] reach high school, a lot of them
have already turned off [to science],`` Moler said.
The center is interdisciplinary,
with faculty from many departments represented. Hongjie
Dai from the Chemistry Department, for example, has
developed a wafer-scale process for fabricating carbon
nanotubes on the end of silicon atomic force microscope
(AFM) tips, which among other advantages allows for
much higher spatial resolution in imaging. He will
collaborate with other CPN researchers to adapt this
technique for a variety of measurements. Kyeongjae
Cho and Adrian Lew, multi-scale modeling experts from
the Mechanical Engineering Department, will help other
investigators understand the interactions between
the tip and their samples and design tips optimized
for specific applications. Calvin Quate (Applied Physics),
co-developer of the AFM with IBM`s Gerd Binnig and
Christoph Gerber, will consult with students and faculty
on issues related to the conception, design and fabrication
of cantilevers. Other key Stanford participants include
Malcolm Beasley (Applied Physics), Mark Brongersma
(Materials Science and Engineering), Aharon Kapitulnik
(Applied Physics and Physics) and Hari Manoharan (Physics).
Participants from IBM`s Almaden
Research Center in San Jose, Calif., include Don Eigler,
a pioneer of low-temperature scanning tunneling microscopy,
spectroscopy and atom manipulation who will participate
in CPN`s middle-school educational outreach; Barbara
Jones, a theoretical and computational physicist who
as CPN`s ``roving theoretician`` will study quantum
spins and help various groups interpret their data;
and Dan Rugar, a manager of nanoscale studies who
is developing a magnetic resonance force microscope
to detect individual electron and nuclear spins. Researcher
John Kirtley of IBM`s T. J. Watson Research Center
in Yorktown Heights, N.Y., will work to develop special
sensors to study the nanoscale properties of magnetic
and superconducting structures.
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