Recent super-resolution fluorescence microscopy studies have revealed significantly altered nuclear organization between normal lymphocyte nuclei and those of classical Hodgkin’s lymphoma. Reported here are the first near-field IR imaging of lymphocyte nuclei, and far-field IR imaging results of whole lymphocytes and nuclei from normal human blood. Read more »
ALS Work Using Spectroscopy
These techniques are used to study the energies of particles that are emitted or absorbed by samples that are exposed to the light-source beam and are commonly used to determine the characteristics of chemical bonding and electron motion.
Ordered Magnetic Patterns in a Disordered Magnetic Material
Scientists have confirmed the presence of chirality, or handedness, in nanometers-thick samples of amorphous (noncrystalline) multilayer materials. The chirality—which potentially could be exploited to transmit and store data in a new way—was observed in the domain walls between neighboring regions of opposite spin. Read more »
Clues to the Solar System’s Original “Bricks and Mortar”
In comet dust, researchers discovered composite organic-inorganic mineral grains that are likely to be the original “bricks and mortar” of the solar system. “Forensic” samples preserved from the birth of the solar system allow investigations into the nature of the atomic and molecular ancestry of the terrestrial planets and life on Earth. Read more »
New Manganese Materials Bolster Cathode Capacity
The most expensive component of a battery, the cathode, requires rare transition metals like cobalt. Previous attempts to replace cobalt with inexpensive and non-toxic manganese delivered insufficient performance. Now, researchers have optimized the composition of high-energy-density, high-capacity manganese-based cathodes. Read more »
Oxygen Vacancies Matter in the LaNiO3 Metal–Insulator Transition
Electronic structure measurements using x-ray absorption spectroscopy suggest that oxygen vacancies contribute to the metal–insulator transition in ultrathin films of LaNiO3. The results give scientists another “knob” to turn to tune this important transition, which could be useful for making advanced electronic devices. Read more »
Graphene-Based Catalyst Improves Peroxide Production
Scientists characterized a graphene-based electrocatalyst that potentially makes the production of hydrogen peroxide more selective, efficient, and cost effective. Hydrogen peroxide is an important commodity chemical with growing demand in many areas, including the electronics industry, wastewater treatment, and paper recycling. Read more »
Experimental Evidence of Chiral Ferrimagnetism in Amorphous GdCo Films
Harnessing high‐resolution Lorentz microscopy, Robert Streubel and co‐workers visualize chiral ferrimagnetic domain walls in amorphous films, revealing a composition dependence that potentially enables a temperature control of intrinsic domain wall properties. The reconstructed electron phase (magnetic induction) of achiral Bloch domain walls is shown here. Read more »
Reversible Fe(II) uptake/release by magnetite nanoparticles
The coexistence of magnetite and aqueous Fe2+ is common in anoxic subsurface environments and can have a great influence on important biogeochemical redox processes. This study demonstrates that the flow direction of electron equivalents in the form of Fe(II) across the magnetite–solution interface changes in a predictable fashion by altering solution pH, background Fe2+(aq) concentration, and magnetite loading. Read more »
New Clues to Oxygen’s Role in Higher-Capacity Batteries
As battery electrodes, layered transition-metal (TM) oxides demonstrate storage capacities far beyond what’s explained solely by TM redox activity. In this work, measurements of the lattice oxygen redox activity in two lithium-rich layered oxides showed strong oxygen redox when manganese was the TM, but not with ruthenium. Read more »
A facile route for the synthesis of heterogeneous crystal structures in hierarchical architectures with vacancy-driven defects via the oriented attachment growth mechanism
TiO2 nanorod arrays based on substrates with heterogeneous crystal structures and remarkable crystalline stability have potential as promising photocatalysts. Researchers synthesized a 1D anatase/rutile heterogeneous TiO2 crystal structure in a hierarchical architecture by forming hybrid organic–inorganic interfaces in a solution-based environment. Read more »
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