Conductance

About: Conductance is a research topic. Over the lifetime, 8088 publications have been published within this topic receiving 235961 citations.

Sodium silicate based thermal interface material for high thermal contact conductance

Abstract: Sodium silicate based thermal interface pastes give higher thermal contact conductance across conductor surfaces than polymer based pastes and oils, due to their higher fluidity and the consequent greater conformability Addition of hexagonal boron nitride particles up to 160 vol percent further increases the conductance of sodium silicate, due to the higher thermal conductivity of BN However, addition beyond 160 vol percent BN causes the conductance to decrease, due to the decrease in fluidity At 160 vol percent BN, the conductance is up to 63 percent higher than those given by silicone based pastes and is almost as high as that given by solder Water is almost as effective as sodium silicate without filler, but the thermal contact conductance decreases with time due to the evaporation of water Mineral oil and silicone without filler are much less effective than water or sodium silicate without filler @S1043-7398~00!00402-3#

Ion Transport Through Excitability-Inducing Material (EIM) Channels in Lipid Bilayer Membranes

Abstract: Two different methods were used to determine the relative permeability and the voltage-dependent conductance of several different cations in excitability-inducing material (EIM)-doped lipid bilayers. In one method, the conductances of individual channels were measured for Li, Na, K, Cs, NH4, and Ca, and in the other method biionic potentials of a membrane with many channels were measured for Li, Na, K, Cs, and Rb. The experimental results for the two methods are in agreement. The relative permeabilities are proportional to the ionic mobilities in free aqueous solution. The voltage dependence of the conductance is the same for all cations measured.

Fano Factor Reduction on the 0.7 Conductance Structure of a Ballistic One-Dimensional Wire

Abstract: We have measured the nonequilibrium current noise in a ballistic one-dimensional wire which exhibits an additional conductance plateau at 0.7x2e(2)/h. The Fano factor shows a clear reduction on the 0.7 structure, and eventually vanishes upon applying a strong parallel magnetic field. These results provide experimental evidence that the 0.7 structure is associated with two conduction channels that have different transmission probabilities.

Implications of cross-species interactions on the temperature dependence of Kapitza conductance

Abstract: We investigate the behavior of Kapitza conductance at interfaces between two Lennard-Jones fcc solids as a function of the range and strength of cross-species interactions via molecular dynamics simulations. It is found that decreasing either of these quantities leads to a reduction in the slope of linear temperature dependence of Kapitza conductance, suggesting a corresponding decrease in the probability of inelastic phonon-phonon interactions. To further explore the mechanisms responsible for such behavior, we calculate the phonon density of states and spectral temperature of each of the monolayers adjacent to the interface. It is found that the reduction of the range and strength of cross-species interactions leads to a softening of the density of states near the interface, while the spectral temperature calculations provide further evidence that such reductions decrease the probability of inelastic phonon scattering. These findings help explain varying accounts of the temperature dependence of Kapitza conductance observed in previous works.