68 research outputs found
Rubber Clay Nanocomposites
The use of nanofillers allows the development of nanocomposites with improved properties and novel applications. The technological goal is possible due to the new compounding method that allows a particle dispersion in the nanometer scale increasing the specific surface area.Fil: Cova Sánchez, Mariajose. Instituto Nacional de Tecnología Industrial. Instituto Nacional de Tecnología Industrial - Caucho; Argentina. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; ArgentinaFil: Bacigalupe, Alejandro. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; Argentina. Instituto Nacional de Tecnología Industrial. Instituto Nacional de Tecnología Industrial - Caucho; ArgentinaFil: Escobar, Mariano Martin. Instituto Nacional de Tecnología Industrial. Instituto Nacional de Tecnología Industrial - Caucho; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mansilla, Marcela Angela. Instituto Nacional de Tecnología Industrial. Instituto Nacional de Tecnología Industrial - Caucho; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Surface-Roughness-Induced Variability in Nanowire InAs Tunnel FETs
We present a comparative study of the surfaceroughness
(SR)-induced variability at low supply voltage
VDD = 0.3 V in nanowire InAs tunnel FETs and strained-silicon
(sSi)MOSFETs. By exploiting a 3-D full-quantum approach based
on the Non-Equilibrium Green\u2019s Function formalism, we show
that the Ion variability in InAs tunnel FETs is much smaller
than the Ioff variability, whereas for VDD = 0.3 V, the sSi MOSFETs
working in the subthreshold regime present similar Ion
and Ioff variability. We explain the smaller Ion compared with
Ioff variability of InAs tunnel FETs by noting that in the source
depletion region, where tunnelingmainly occurs for VGS = VDD,
microscopic subband fluctuations induced by SR are small compared
to macroscopic band bending due to the built-in potential
of the source junction and to the gate bias. This results in SR-induced
variability that is larger in InAs tunnel FETs than in sSi
MOSFETs
Impact of Interface Traps on the IV Curves of InAs Tunnel-FETs and MOSFETs: A Full Quantum Study
We present the \ufb01rst computational study employing a full
quantum transport model to investigate the effect of interface
traps in nanowire InAs Tunnel FETs and MOSFETs. To this
purpose, we introduced a description of interface traps in a
simulator based on the NEGF formalism and on a 8
78 k\ub7p
Hamiltonian and accounting for phonon scattering. Our results
show that: (a) even a single trap can detereorate the inverse
sub-threshold slope (SS) of a nanowire InAs Tunnel FET; (b)
the inelastic phonon assisted tunneling (PAT) through interface
traps results in a temperature dependence of the Tunnel FETs
IV characteristics; (c) the impact of interface traps on Iof f is
larger in Tunnel FETs than in MOSFETs; (d) interface traps
represent a sizable source of device variability
Investigation of localized versus uniform strain as a performance booster in InAs Tunnel-FETs
International audienc
Dynamic and viscoelastic behavior of natural rubber/layered silicate nanocomposites obtained by melt blending
Vulcanized natural rubber/layered silicate (montmorillonite)
nanocomposites prepared by melt blending with
different contents of organoclay (0, 5, 10, 20 wt%) were
investigated. The morphological characteristics of
the materials were studied by transmission electron
microscopy (TEM), wide angle X-ray diffraction, and
dynamic mechanical thermal analysis (DMTA). X-ray
spectra evidence some intercalation of the clay, while
TEM results show a good dispersion of the clay and
the occurrence of partial delamination. DMTA analysis
with varying temperature shows that the peak of the
loss modulus broadens by increasing the clay content
within the material, though the peak temperature is
scarcely affected. Mechanical reinforcement induced
by the presence of the clay is evidenced by static tensile
tests. At every clay content explored, dynamic
experiments show a nonlinear behavior (Payne effect),
which strongly increases with the amount of clay incorporated
and is considerably more pronounced than in
natural rubber filled with comparable amounts of conventional
fillers. The viscoelastic behavior of the materials
is investigated by recovery tests of low amplitude
storage modulus, carried out after the application of a
large strain perturbation, and by stress relaxation
experiments
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