Physics Today
SCOPUS (1948-2023)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 TransparencyElectromagnetically 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 techn... ...
Tập 50 Số 7 - Trang 36-42 - 1997
Block Copolymers—Designer Soft MaterialsBlock 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... ...
Tập 52 Số 2 - Trang 32-38 - 1999
The Hydrogen EconomyIf 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
Tập 57 Số 12 - Trang 39-44 - 2004
Carbon Nanotubes as Molecular Quantum WiresCarbon 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).
Tập 52 Số 5 - Trang 22-28 - 1999
Shear thickening in colloidal dispersionsShampoos, 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.
Tập 62 Số 10 - Trang 27-32 - 2009
Thermoelectric Materials: New Approaches to an Old ProblemThermoelectrics 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 elec... ...
Tập 50 Số 3 - Trang 42-47 - 1997
Cavity Quantum ElectrodynamicsEver 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 ... ...
Tập 42 Số 1 - Trang 24-30 - 1989
The Grid: A New Infrastructure for 21st Century ScienceAs computer networks become cheaper and more powerful, a new computing paradigm is poised to transform the practice of science and engineering.
Tập 55 Số 2 - Trang 42-47 - 2002
Supercooled and Glassy WaterCold, 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.
Tập 56 Số 6 - Trang 40-46 - 2003