Physics Today
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Supercooled and Glassy Water
Physics Today - Tập 56 Số 6 - Trang 40-46 - 2003
Cold, noncrystalline states play an important role in understanding the physics
of liquid water. From recent experimental and theoretical investigations, a
coherent interpretation of water’s properties is beginning to emerge.
The Hydrogen Economy
Physics Today - Tập 57 Số 12 - Trang 39-44 - 2004
If the fuel cell is to become the modern steam engine, basic research must
provide breakthroughs in understanding, materials, and design to make a
hydrogen-based energy system a vibrant and competitive force
Block Copolymers—Designer Soft Materials
Physics Today - Tập 52 Số 2 - Trang 32-38 - 1999
Block copolymers are all around us, found in such products as upholstery foam,
adhesive tape and asphalt additives. This class of macromolecules is produced by
joining two or more chemically distinct polymer blocks, each a linear series of
identical monomers, that may be thermodynamically incompatible (like oil and
vinegar). Segregation of these blocks on the molecular scale (5–100 nm) can
produce...
Thermoelectric Materials: New Approaches to an Old Problem
Physics Today - Tập 50 Số 3 - Trang 42-47 - 1997
Thermoelectrics is an old field. In 1823, Thomas Seebeck discovered that a
voltage drop appears across a sample that has a temperature gradient. This
phenomenon provided the basis for thermocouples used for measuring temperature
and for thermoelectric power generators. In 1838, Heinrich Lenz placed a drop of
water on the junction of metal wires made of bismuth and antimony. Passing an
electric cur...
Optics of the Atmosphere: Scattering by Molecules and Particles
Physics Today - Tập 30 Số 5 - Trang 76-77 - 1977
The renaissance of x-ray optics
Physics Today - Tập 37 Số 4 - Trang 44-52 - 1984
There has been a spectacular resurgence of interest in the soft x-ray and
extreme ultraviolet regions of the electromagnetic spectrum in the past few
years. In part, this is due to the development of new x-ray optical devices that
have given us an x-ray view of the universe on scales ranging from the
microscopic to the astronomical (see figure 1).
Lagrangian coherent structures: The hidden skeleton of fluid flows
Physics Today - Tập 66 Số 2 - Trang 41-47 - 2013
New techniques promise better forecasting of where damaging contaminants in the
ocean or atmosphere will end up.
Issues and Opportunities in Materials Research
Physics Today - Tập 45 Số 10 - Trang 24-31 - 1992
In the fall of 1989 the National Research Council issued a major report on
materials science and engineering, known more familiarly as the
Chaudhari-Flemings report (after Praveen Chaudhari and Merton Flemings) or
simply the MS&E report. This was followed in 1990 by a series of regional
meetings in four different parts of the US involving hundreds of participants
from industry, academia and govern...
Defects and Superconductivity in the Copper Oxides
Physics Today - Tập 44 Số 6 - Trang 34-40 - 1991
Few superconducting materials have presented us with the structural elegance and
complexity displayed by the recently discovered high-Tc copper oxides. The
structures of these materials, consisting of metal-oxygen layers stacked in a
variety of sequences, with the metal atoms often in unusual coordinations, are
interesting in their own right. More importantly, our present understanding of
the prop...
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