Articles you may be interested in Phonon thermal conductivity in silicon nanowires: The effects of surface roughness at low temperatures On the effect of particle porosity and roughness in magnetorheology Thermal conductivity of graphene ribbons from equilibrium molecular dynamics: Effect of ribbon width, edge roughness, and hydrogen termination Appl. Effect of surface roughness on thermal cond...

The thermal conductivity of silicon nanowires (SiNWs) is investigated by molecular dynamics (MD) simulation. It is found that the thermal conductivity of SiNWs can be reduced exponentially by isotopic defects at room temperature. The thermal conductivity reaches the minimum, which is about 27% of that of pure 28Si NW, when doped with 50% isotope atoms. The thermal conductivity of isotopic-super...

We report on the thermal conductivity measurement of Ge quantum dot superlattices. The samples used were grown using molecular beam epitaxy. The typical dot sizes were determined by transmission electron microscopy measurements to be 75 nm in base and 7 nm in height. A differential 3o method was employed to characterize the thermal conductivity of the samples. At room temperature, thermal condu...

The effective conductivity of 2D double periodic composite materials with circle disjoint inclusions is investigated. Ideal and non-ideal contact conditions on the boundary between the matrix and the inclusions are considered. In both cases, explicit formulas for the effective conductivity are obtained. These formulas contain all parameters of the considered model such as the conductivity, radi...

We present the deepest optical spectrum acquired to date of Balmer-dominated shocks in the NW rim of SN 1006. We detect the broad and narrow components of Hα, Hβ and Hγ and report the first detection of the He I λ 6678 emission line in this supernova remnant. We may have detected, at the 1.5σ level, faint He II λ4686 emission. We measure a full width half maximum of 2290± 80 km s in the broad c...

Using the CTRW approximation the simplest possible nontrivial model of ac hopping conductivity in disordered solids, is constructed. The model predicts universality of the frequency-dependent conductivity, independent of temperature, chemical composition, and conductivity mechanism, in reasonably good agreement with experiments. It is shown that all qualitative features of experimental ac hoppi...

Despite many studies of the percent loss of hydraulic conductivity in excised branches, there is doubt as to whether cutting stems in air introduces unnatural embolism into the xylem at the cut surface. To address this question, hydraulic conductivity was measured in seedlings of northern red oak (Quercus rubra L.) and rooted scions of eastern cottonwood (Populus deltoides Bartr. ex Marsh.) tha...

Introduction: The electric conductivity can potentially be used as diagnostic information due to its ability to reflect the grade of tissue damage (see, e.g., [1]). In its general form, the conductivity is given by a rank-2 tensor, including anisotropic cases of conductivity. In vivo, anisotropic conductivities can be found in tissue with preferred cell direction, e.g., in muscles and nerves [2...