Physics Today
SCOPUS (1948-2024)SCIE-ISI
0031-9228
1945-0699
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Cơ quản chủ quản: AMER INST PHYSICS , American Institute of Physics
Lĩnh vực:
Physics and Astronomy (miscellaneous)
Các bài báo tiêu biểu
Electromagnetically Induced Transparency
Tập 50 Số 7 - Trang 36-42 - 1997
Electromagnetically induced transparency is a technique for eliminating the
effect of a medium on a propagating beam of electromagnetic radiation. EIT may
also be used, but under more limited conditions, to eliminate optical
self-focusing and defocusing and to improve the transmission of laser beams
through inhomogeneous refracting gases and metal vapors, as figure 1
illustrates. The technique may...
Block Copolymers—Designer Soft Materials
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...
The Hydrogen Economy
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
Carbon Nanotubes as Molecular Quantum Wires
Tập 52 Số 5 - Trang 22-28 - 1999
Carbon nanotubes are cylindrical molecules with a diameter of as little as 1
nanometer and a length up to many micrometers. They consist of only carbon
atoms, and can essentially be thought of as a single layer of graphite that has
been wrapped into a cylinder, (See figure 1 and the article by Thomas Ebbesen in
PHYSICS TODAY, June 1996, page 26).
Shear thickening in colloidal dispersions
Tập 62 Số 10 - Trang 27-32 - 2009
Shampoos, paints, cements, and soft body armor that stiffens under impact are
just a few of the materials whose rheology is due to the change in viscosity
that occurs when colloidal fluids experience shear stress.
Thermoelectric Materials: New Approaches to an Old Problem
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...
Cavity Quantum Electrodynamics
Tập 42 Số 1 - Trang 24-30 - 1989
Ever since Einstein demonstrated that spontaneous emission must occur if matter
and radiation are to achieve thermal equilibrium, physicists have generally
believed that excited atoms inevitably radiate. Spontaneous emission is so
fundamental that it is usually regarded as an inherent property of matter. This
view, however, overlooks the fact that spontaneous emission is not a property of
an isola...
The Grid: A New Infrastructure for 21st Century Science
Tập 55 Số 2 - Trang 42-47 - 2002
As computer networks become cheaper and more powerful, a new computing paradigm
is poised to transform the practice of science and engineering.
Supercooled and Glassy Water
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.