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

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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