Anisotropic electron conductivity

Keywords Anisotropic electron conductivity Cast film DNA-lipid complex ... 

The idea of electronic conductivity in the crystals of this cluster is stimulated by the metallic reflectance of the crystals. A potential conductivity is expected to be anisotropic because of the anisotropic order of the clusters inside the crystal. As a consequence, the electric resistance is expected to be smaller in the direction of the tubes than in the vertical direction where there is no graphite-like bridging between the clusters. 

Abstract Liquid-crystalline (LC) polymers that exhibit ionic or electronic conduction are described. Anisotropic and efficient transportation of electrons and ions is expected for these materials. The ordered LC nanostructures of LC polymers having ion- or electron-active moieties are important for efficient anisotropic transport. For electron-conductive materials, we focus on side-chain LC polymers. 

In planar transition metal complexes, the interactions among the metal and ligand tt orbitals which occur within these stacks can provide a continuous pathway for electron delocalization along one direction in the solid which is detectable as anisotropic electrical conductivity. Such effectively one-dimensional solid-state interactions can result in unique properties and property combinations. 

Based on relation (3-62) for the anisotropic part of the distribntion function / - (r) and Ohm s lawj = a E, we can express the electron conductivity in plasma in terms of an EEDF as... 

Fig. 8 Double logarithmic plot of ionic and electronic conductivity, /C on and k, of oxide films. Dotted line ionic conductivity equals the electronic one. Arrows indicate changes due to increasing field, approaching Ufb and increasing electronic equilibrium. Passive Ti as example 1 stable passive film of Ti02 near the flat band potential 2 insulating film of Ti02 on anisotropic metal plane (xxxO) 3 as 2, but for the isotropic, close packed metal plane (0001).

The dependence of the conductivity on transport through quasi-ID chains leads to some profound effects. For an ordered quasi-1D metal with its highly anisotropic electronic Fermi surface, chain direction is given by... 

The systematics described for the pressure dependence of resistivity features, e.g., A and T, are consistent with a pressure-induced increase in the characteristic electronic energy scale in Ce-based intermetallics, a result that can be understood if the hybridization between conduction and 4f electrons increases with pressure. As noted by Kadowaki and Woods (1986), there appears to be a universal relationship between Sommerfeld coefficient and A values among anomalous lanthanide and actinide compounds. We will show later that this universality continues to hold at modest pressures as well. Presumably this relationship is valid because it is a ground-state property of the underlying electronic correlations responsible for both y and A. However, it must be remembered that y is a thermodynamically-defined quantity whereas A depends on (anisotropic) electronic... 

J. Liu and Z. Lai, Reliability of Anisotrop-ically Conductive Adhesive Joints on a Rip-Chip/FR4 Substrate, J. Electron. Packaging, Vol 124, 2002, p 240-245... 

Conductivity of porous MOFS seemed impossible until recently. Conductivity implies either mobility of species (ionic conductivity) or delocalization (electronic conductivity, isotropic or anisotropic). For MOFs, if ionic conduction is theoretically possible when dedicated inserted species are chosen, electronic conduction seems to be almost inaccessible for at least two reasons (i) there is no clear mention... 

Sancaktar E, Dilsiz N (1997) Anisotropic alignment of nickel particles in magnetic field for electronically conductive adhesives. J Adhes Sci Technol 11 155-166... 

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