Now showing items 1-10 of 107
Synthesis and processing of nanocomposite permanent magnets approaches
(Georgia Institute of Technology, 2005-05-01)
Study of microstructure in SrTiO₃/Si by high-resolution transmission electron microscopy
(Georgia Institute of Technology, 2002-01)
Microstructure in the SrTiO₃/Si system has been studied using high-resolution transmission electron microscopy and image simulations. SrTiO₃ grows heteroepitaxially on Si with the orientation relationship given by ...
Low-threshold two-photon pumped ZnO nanowire lasers
(Georgia Institute of Technology, 2009-05-11)
We report in this communication the two-photon absorption (TPA)-induced room-temperature lasing performance of ZnO nanowires. Under femtosecond pulse-excitation at λ = 700 nm in the infrared regime, a remarkably low threshold ...
Explosive shock processing of Pr₂Fe₁₄B/α–Fe exchange-coupled nanocomposite bulk magnets
(Georgia Institute of Technology, 2005-03)
Explosive shock compaction was used to consolidate powders obtained from melt-spun Pr₂Fe₁₄B/α–Fe nanocomposite ribbons, to produce fully dense cylindrical compacts of 17–41-mm diameter and 120-mm length. Characterization ...
Collective oscillations in a single-wall carbon nanotube excited by fast electrons
(Georgia Institute of Technology, 2001-08-31)
Electron energy loss spectroscopy is a well adapted tool for the investigation of the valence excitations of individual nanometer-size particles. The interpretation of the loss spectra of such small particles, however, ...
Mechanical behavior and magnetic separation of quasi-one-dimensional SnO₂ nanostructures: A technique for achieving monosize nanobelts/nanowires
(Georgia Institute of Technology, 2005-03-25)
The as-synthesized nanowires and nanobelts usually have a large size distribution. We demonstrate here a ball milling technique for narrowing the size distribution of oxide nanobelts and nanowires. High-resolution scanning ...
Synthesis, chemical ordering, and magnetic properties of FePtCu nanoparticle films
(Georgia Institute of Technology, 2003-05-15)
FePtCu nanoparticles with varying composition were prepared by the simultaneous polyol reduction of platinum acetylacetonate and copper bis(2,2,6,6-tetramethyl-3,5-heptanedionate) and the thermal decomposition of iron ...
Bulk nanocomposite magnets produced by dynamic shock compaction
(Georgia Institute of Technology, 2004-07-15)
Exchange-coupled R₂Fe₁₄B/α -Fe (R = Nd or Pr) nanocomposite bulk magnets with nearly full density have been successfully produced by shock compaction of melt-spun powders. X-ray diffraction and transmission electronic ...
Conductance quantization in multiwalled carbon nanotubes
(Georgia Institute of Technology, 1999)
We present results of carbon nanotube conductance measurements. The experiments were performed using an scanning probe microscope (SPM) system where a carbon nanotube fiber is connected to the SPM tip and then lowered ...
Incoherence effects in reflection electron microscopy
(Georgia Institute of Technology, 1992-04)
The phase contrast imaging of surface steps in reflection electron microscopy is analysed. It is shown that the typical images are seriously affected by incoherence effects and that this arises, not from the strong inelastic ...