Please enjoy the interview below with our SAB (Scientific Advisory
Board) Member,
Dan Morse of UCSB and a 2006 Scientific American Top 50 Researcher.
Dr. Daniel Morse is the Wilcox Professor of biotechnology at the University
of California, Santa Barbara.
He received his BA in biochemistry from Harvard, and his doctorate
in molecular biology from the
Albert Einstein College of Medicine. He initially taught at Harvard
before joining the faculty at UCSB.
He founded the field of silicon biotechnology, and has received numerous
academic honors and awards.
He was recently honored by MIT Technology Review as one of the top
50 technology innovators of 2006.
He currently serves on the Scientific Advisory Board of nanotechnology.com.
Dr. Daniel Morse is using techniques borrowed from nature to create
superior technologies.
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Dr. Daniel Morse is using techniques borrowed from nature to create
superior technologies.
Daniel Morse Interview
Questions by Sander Olson. Answers by Daniel Morse
Tell us about yourself. What is your background, and on what projects
are you currently working?
I am currently the Wilcox Professor of Biotechnology, Professor of Biomolecular
Science and Engineering and Director of the UCSB-MIT-Caltech Institute
for Collaborative Biotechnologies at the University of California, Santa
Barbara. I received my BA in biochemistry from Harvard, and my PhD in molecular
biology from the Albert Einstein College of Medicine. I was a professor
of molecular genetics and microbiology at Harvard before becoming a faculty
member at the University of California. I am widely known as the founder
of “silicon biotechnology”. My research focuses on using biotechnology
and molecular genetics to dissect the molecular mechanisms that underlie
complex biological processes, such as energy and information processing
and nanofabrication, and then "translating" the resulting information to
develop new routes to high-performance materials with complex functionality.
How can learning natural processes allow us to improve existing technologies?
By studying the underlying mechanisms inherent in natural processes
we can transfer this knowledge into what I refer to as “hard engineering”.
In other words, we endeavor to discover the chemical and physical principles
that provide the unique advantages inherent in natural processes, such
as shell formation and silica biosynthesis, and to then translate these
processes into making useful products. Since most biological molecules
such as proteins are heat labile, natural processes are typically low temperature.
By contrast, most modern production methods require costly high-temperature
operation.
Describe your research into semiconductors. Can semiconductors be
made by mimicking biological processes?
Our research shows that semiconductors need not be made using expensive,
high-temperature processes. We have been able to make a wide variety of
semiconductors in the form of nanostructured thin-films and nanoparticles
- many with forms or structures that could not be achieved by conventional
high-temperature methods. Nanostructured thin films have high surface area
and other properties advantageous for energy applications. We can control
the growth of these nanostructures kinetically – by using regulated catalysis
instead
of heat. This is what happens in biology, and this process allows us to
make materials that could not be made using conventional manufacturing.
What other technologies besides semiconductors could potentially
benefit from these low-temperature biologically inspired techniques?
We envision a number of products that could be significantly improved
by using these processes. We could create safe, energy-dense batteries
for hybrid vehicles, more efficient and less costly solar cells, better
catalysts, improved infrared detectors and adaptive optical materials.
Describe your research into abalone shells. Why are these shells
instructive to the field of nanotechnology?
Abalone shells are composed primarily of calcium carbonate – chalk -
yet are 3,000 times more fracture resistant than simple calcium carbonate.
The shell is tough enough to drive nails, and our team wanted to discover
the underlying mechanisms that made such a strong material out of such
a weak and brittle mineral. We examined the structure of abalone
shells, which are composed of alternating layers of minerals interspersed
with gossamer thin protein sheets. We discovered that the self-assembly
of these nanostructured films of protein creates a series of nanopores.
These nanopores act as a molecular stencil to guide the growth of the crystalline
material from one layer to the next. Researchers previously thought that
abalone shells were made in a manner similar to the way plywood is made
– one layer at a time. But we discovered that the mineral is growing continuously
through many layers, through these protein sheets. Furthermore, the abalone
shell composite is self-healing. It resists cracking, and heals microcracks
by employing molecular “sacrificial bonds” which reform when severed. We
subsequently discovered that this mechanism is important in bone as well.
More recently, you have done work on silica nanostructures. Why are
these important?
Our more recent research is based on the mechanism we discovered biology
uses to create intricate skeletal structures made of silica. Certain marine
sponges essentially have glass skeletons. In some cases these are simply
glass needles, in other cases they are complex and beautiful structures
that almost seem to be woven out of fiberglass. We discovered that the
cells of the sponge have an enzyme that facilitates the low temperature
synthesis of these glass needles – the enzyme acts as both a catalyst and
a template. We discovered a way to replace the enzyme and create semiconducting
crystals with a modification of this low temperature, low cost, and efficient
process. Unlike conventional semiconductor fabrication techniques, which
are quite expensive, we can make semiconductors from water and aqueous
solutions.
Will any commercial products from your research emerge within the
next five years?
We believe that this technique could have myriad commercial applications,
including electrical storage batteries, photovoltaics, improved infrared
detectors, better medical ultrasonic imaging, and catalysts. For
instance, we have created excellent high surface-area electrodes from the
metal oxides we have made, and this could result in substantially more
efficient batteries. We should also be able to make extremely inexpensive
integrated circuits, although these chips might not be suitable for high-performance
microprocessors. With regard to solar voltaics, we are just developing
the first prototypes, but we should be able to use these technologies to
inexpensively create highly efficient solar cells. The first commercial
applications could emerge within the next five years.
What institutions are funding your research? Are any corporations
providing financing?
We are part of the Very High Efficiency Solar Cell (VHESC) program at
DARPA, which may be the world’s largest solar R&D program. We also
receive funding from several other Government agencies, including the Department
of Energy, the US Army Research Office, the National Science Foundation,
NASA and the Department of Commerce.
More information on the VESC program can be found at: http://www.darpa.gov/sto/solicitations/vhesc/proposers.htm
More information on the US Army Research Office can be found at: http://www.arl.army.mil/www/default.cfm?Action=29&Page=29
More information on the National Science Foundation can be found at:
http://www.nsf.gov/
More information on the NOAA can be found at: http://www.noaa.gov/
More information on the Department of Energy can be found at: http://www.energy.gov/
We are also collaborating with several high-technology firms aiming
to develop specific applications of our technology.
Outside of your own work, what excites you the most today, in small
and advanced technologies?
I am fascinated by the potential of biotech to reveal and mimic high-efficiency
processes that have evolved from millennia of biological evolution. Natural
processes are constrained by both a limited set of materials with which
to work, and low temperature processes, yet they result in materials and
systems with amazing properties. The close integration between molecular
biology, physics, chemistry, and device engineering is particularly exciting.
How do you see your research advancing during the next decade?
During the next decade, the seeds of current bionanotechnology research
will begin to bear fruit in practical devices. Some devices, such as biosensors,
are easy to predict, because such devices employ engineered biomolecules
that are absolutely necessary for molecular recognition. But the energy
field could be transformed by the nanobio research we are conducting. For
instance, if we could inexpensively mass-produce solar cells that were
50% efficient, that would radically transform the energy equation. Similarly,
fuel cells have enormous untapped potential. This could easily be
a multi-billion dollar industry within a decade.
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