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Coatings of gold

The most widely used methods for the application of coatings of gold, silver and the platinum group metals (platinum, palladium, rhodium, iridium, ruthenium, osmium) to base metals are mechanical cladding and electroplating. [Pg.557]

In view of its susceptibility to sulphide tarnishing, silver may itself require some measure of protection in many decorative and industrial applications. Chromate passivation processes are commonly employed, but as an alternative, thin coatings of gold, rhodium or palladium may be used. [Pg.559]

Liu, (., Cankurtaran, B., Wieczorek, L., Ford, M.J. and Cortie, M.B. (2006) Anisotropic optical properties of semitransparent coatings of gold nano-caps. Advanced Functional Materials, 16, 1457-1461. [Pg.348]

The impedance hygrometer measures the water content of a sample by means of a probe whose electrical impedance is a function of the vapor pressure of moisture in the fluid. The probe consists of an aluminum strip that is anodized to form a porous layer of aluminum oxide. A thin coat of gold is applied over the aluminum oxide. Water vapor penetrates the gold layer and equilibrates on the aluminum oxide. Leads from the gold and aluminum electrodes of the probes connect the sensing element to the measuring circuitry. The moisture content of solids can also be measured indirectly by detecting the moisture in the atmosphere above or near the process solids because the atmosphere near the solids is in equilibrium with the moisture content of the process materials. [Pg.359]

In this sector of the market nickel-chromium systems are used most widely but other finishes have become fashionable, including gold for luxury bathrooms. Generally in this instance a thin coating of gold is provided over thicker layers of copper and nickel (similar to those used beneath chromium). An important feature recently was the introduction of the special filled poly(bu-tylene terephthalate) mentioned in an earlier section, which conveys a sense of weight and quality well-suited to products with more costly finish. [Pg.186]

Inorganic Hydrophobic coating of gold chemoresistor for rejection of polar interferents Polarity of analyte and interferents, design of self-assembled monolayers 42... [Pg.7]

Figure 4.12 (a) LbL coating of gold nanoparticles (AuNPs) using siRNA and PLL as... [Pg.119]

A thin circular-disk earring 4.00 cm in diameter is plated with a coating of gold 0.25 mm thick from an Au " bath. [Pg.734]


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