Iridium electrical properties

Interesting electrical properties are to be expected with the stepwise extension of this TT-system. The preparation of multilayered cyclophanes proved to be laborious [6] nevertheless new synthetic methods in transition metal chemistry of arenes have opened up a promising alternative approach via preparation of multidecker sandwich complexes (structure type D in Fig. 3). First row transition metals like chromium, iron and cobalt [51] form strong coordinative bonds with arenes when their oxidation state is low [48a] whereas second and third row elements like ruthenium, rhodium and iridium are strongly bonded towards arenes in higher oxidation states [48a, 51]. Sandwich complexes of cyclophanes can be divided into two groups ... 

WeUand JD, Anderson DJ, Humayun MS (2002) In Vitro Electrical Properties for Iridium Oxide Versus Titanium Nitride Stimulating Electrodes. IEEE Transactions on Biomedical Engineering 49 1574-1579. 

One of the primary uses of iridium is in the manufacture of alloys. An alloy is made by melting and mixing two or more metals. An alloy s properties differ from those of the elements that make it up. Iridium is often combined with platinum, for example, to provide a stronger material than the platinum itself These alloys are very expensive and are used for only special purposes. For instance, the spark plugs used in helicopters are made of a platinum-iridium alloy. Such alloys are also used for electrical contacts, special types of electrical wires, and electrodes. 

Two fundamental properties influencing the electrochemical behavior of acid-growth hydrous iridium oxide films are (1) the acidity of the hydrated material and the variation of this property with change in the iridium oxidation state,4 and (2) the difference in electrical conductivity between the reduced and oxidized form of the surface film.170 174 According to Burke et al.9M both properties... 

Figure 5. Iridium Set of thermophysical properties obtained from a single pulse-calorimetric experiment on an iridium sample a) basic electrical quantities and the pyrometer signal as a function of experimental duration b) specific enthalpy as a function of temperature c) electrical resistivity, at initial geometry and with volume expansion, as a function of temperature d) thermal conductivity as a function of temperature e) thermal diffusivity as a frmction of temperature f)...

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