Using (331)B GaAs templates with nanoscale fluctuations, we have fabricated InGaAs/GaAs quantum wires ~QWRs! with a density of ;2.0310 cm and the degree of polarization as high as ;28%. In the samples with weak lateral confinement, we observed thermal delocalization of carriers from the one-dimensional QWR states to the two-dimensional quantum-well states with increasing temperature, which is a...

Quantum confinement of carriers has a substantial impact on nanoscale device operations. We present electrical transport analysis for lithographically fabricated sub-5 nm thick Si nanowire field-effect transistors and show that confinement-induced quantum oscillations prevail at 300 K. Our results discern the basis of recent observations of performance enhancement in ultrathin Si nanowire field...

we report the growth by ion exchange synthesis of zns nanoparticles in mcm-41 matrices using zn (ch3coo)2 and na2s starting sources. the final product (zns/mcm-41) was characterized by x-ray diffraction (xrd) pattern, transmission electron microscopy (tem), scanning electron microscopy (sem), infrared spectrometry (ir) and uv-vis spectroscopy. its crystalline structure and morphology was studie...

Rolling vortices and chaotic swirling are the most visually compelling aspect of smoke. Standard numerical simulation techniques for the animation of smoke suffer from a loss of these vortex patterns due to numerical damping. The majority of methods in computer animation use techniques such as vorticity confinement [3] to re-capture them. In this work, a Lagrangian method is presented which exp...

In this paper we review our work on thermal and thermoelectric properties of semiconductor low-dimensional structures, e.g. quantum wells and quantum wires, with emphasis on the effects of spatial confinement of acoustic phonons. We particularly concentrate on calculation of the phonon relaxation rates in mass-difference, Umklapp, point defect, and dislocation scattering processes that takes in...