Coating with silver

Other Uses. Photochromic glass contains silver chloride (80) and silver molybdate [13765-74-7] (81) (see Chromogenic materials). An apparatus coated with silver nitrate has been described for the detection of rain or snow (82). Treatment with silver-thiosulfate complex has been reported as dramatically increasing the post-harvest life of cut carnations (83). Silver sulfate has been used in the electrolytic coloring of aluminum (84). Silver sulfate also imparts a yellowish red color to glass bulbs (85). 

Thin sheets of mica or polymer films, which are coated with silver on the back side, are adhered to two cylindrical quartz lenses using an adhesive. It may be noted that it is necessary to use an adhesive that deforms elastically. One of the lenses, with a polymer film adhered on it, is mounted on a weak cantilever spring, and the other is mounted on a rigid support. The axes of these lenses are aligned perpendicular to each other, and the geometry of two orthogonally crossed cylinders corresponds to a sphere on a flat surface. The back-silvered tbin films form an optical interferometer which makes it possible... 

The first permanent images were obtained by the French landowner . N. Niepce using bitumcn-coated pewter (bitumen hardens when expo.sed to light for several hours and the unexposed portions can then be dissolved away in oil of turpentine). He then helped the portrait painter, L. J. M. Daguerre, to perfect the daguerreotype process which utilized plates of copper coated with silver sensitized with iodine vapour. The announcement of this process in 1839 was greeted with enormous enthusiasm but it. suffered from the critical drawback that each picture was unique and could not be duplicated. 

A copper strip with a mass of 2.00 g is dipped into a solution of AgN03. After some time has elapsed, the copper strip is coated with silver. The strip is removed from the solution, dried, and weighed. The coated strip has a mass of 4.18 g. What are the masses of copper and silver metals in tile strip (Hint Remember that the copper metal is being used up as silver metal forms.)... 

C19-0128. A galvanic cell is constructed using a silver wire coated with silver chloride and a nickel wire immersed in a beaker containing 1.50 X 10 M NiCl2 (a) Determine the balanced cell reaction, (b) Calculate the potential of the cell, (c) Draw a sketch showing the electron transfer reaction occurring at each electrode. 

For this version, the micro structured AlMg3 platelets were coated with silver by CVD in [43], In [44], the platelets were either totally made of silver (as constmction material) or of AlMg3 and then coated by PVD with silver. In the latter version, two sub-versions were made with and without anodic oxidation to a generate nano-porous surface structure. 

Some silverware is not made entirely of silver but is electroplated, or coated, with silver. The process of electroplating a fork would involve the migration of —... 

The commercially available dicyanomethylene squaraine dye Seta-670-mono-NHS showed extremely low blinking effects and good photostability when used in single-molecule studies of multiple-fluorophore labeled antibodies [113]. Seta-670-mono-NHS and Seta-635-NH-mono-NHS were covalently labeled to antibodies and used in a surface-enhanced immunoassay [114]. From the fluorescence intensity and lifetime changes determined for a surface that had been coated with silver nanoparticles, both labeled compounds exhibited a 15- to 20-fold... 

This consists of a silver wire, coated with silver chloride and in contact with a solution of potassium chloride saturated with silver chloride. The solution is contained in a tube, the end of which is sealed with a porous plug or disc to facilitate contact with the sample solution. The half-cell and associated electrode reaction is represented by... 

Figure 16.5 shows a silver-silver chloride electrode which comprises of a silver wire coated with silver chloride (B) and is duly placed in a 1 M KC1 solution saturated with AgCl (C). 

Did you know that redox reactions are an important part of CD manufacturing The CDs you huy at a music store are made of Lexan , the same plastic used for riot shields and bulletproof windows. The CDs are coated with a thin aluminum film. They are copies of a single master disc, which is made of glass coated with silver, as seen in Figure 10.9. Silver is deposited on a glass disc hy the reduction of silver ions with methanal, HCHO, also known as formaldehyde. In the same reaction, formaldehyde is oxidized to methanoic acid, HCOOH, also known as formic acid. The redox reaction occurs under acidic conditions. 

Electroplating is a common method used to produce beautiful and durable metal objects. Jewellery and other metal objects can be made cheaper, stronger, and more durable by coating a strong, cheaper metal with a thin layer of a more expensive metal. For example, cheaper jewellery can be made from copper or nickel, and then coated with silver. More expensive jewellery can be made from silver, and then coated with gold. 

Wire of sliver coated with silver fluoride... 

Silver wire coated with silver chloride... 

The most extensive work on the catalyzed reaction was carried out with a nuclear gold sol (phosphorus reduction) added as the initial catalyst. The gold particles soon become coated with silver, so the major portion of the measured reaction is actually silver-catalyzed. The reaction rate is proportional to the surface area of the catalyst. This is shown by the following experimental results. 

An attempt at a direct determination of the number of silver atoms in a nucleus just able to initiate physical development was made by Reinders and his co-workers (Reinders and Hamburger, 41 Reinders and deVries, 42). Silver was deposited on glass plates by sublimation in a high vacuum. The source of the silver was a molybdenum wire coated with silver and heated electrically to 500-600°. The glass plates were carefully cleaned and outgassed before use. 

The most common analytical applications require one of the two electrodes to be characterized by an unchanging potential, known and independent of the characteristics of the solution being analyzed. Such a device is called the reference electrode. One of the most commonly used is the Ag/AgCl electrode, which consists of a silver wire coated with silver chloride and immersed into a solution saturated by chloride ions a porous plug serves as a cormection bridge with the outer solution. 

J. Silver. Silver (mp 961 °C), has the highest electrical and thermal conductivity of any metal. It is used in making electrical contacts and in the construction of some laboratory ware. It is easily electrodeposited, and both chemical and evaporation coating with silver are possible. Silver is generally less resistant to attack by oxidizing agents than is platinum or gold. However, it is resistant to fused alkalies and fused alkali-peroxide mixtures. Therefore, it is used to make... 

FIGURE 18.6 A glass electrode consists of a silver wire coated with silver chloride that dips into a reference solution of dilute hydrochloric acid. The hydrochloric acid is separated from the test solution of unknown pH by a thin glass membrane. When a glass electrode is immersed in the test solution, its electrical potential depends linearly on the difference in the pH of the solutions on the two sides of the membrane. 

Particulates of metallic silver emitted from the burining of fossil fuels and municipal refuse are likely to become coated with silver oxide, silver sulfide, and silver carbonate as the particles cool and undergo deposition (Smith and Carson 1977). 

Camner P, Hellstrom PA, Lundborg M, et al. 1977. Lung clearance of 4-pm particles coated with silver, carbon, or beryllium. Arch Environ Health 32 58-62. 

Tubes are formed by extrusion. They have the advantage of being less fragile than flat pieces and are more suitable in some types of circuit assembly. After sintering, the tubes are completely coated with silver. Automatic machines then grind the silver from one end and remove a ring of silver from the outer surface near the other end (Fig. 5.9). The leads are looped round each end and soldered in place by immersion in solder. 

The electroforming process is used for the production of single or low numbers of cavities, as opposed to others requiring many cavities. The process deposits metal on a master in a plating bath. Many proprietary processes exist. The master can be constructed of such materials as plastic, reinforced plastic, plaster, or concrete that is coated with silver to provide a conductive coating. The coated master is placed in a plating tank and nickel or nickel-cobalt is deposited to the desired thickness of up to about 0.64 cm (0.25 in.). With this method, a hardness of up to 46 RC is obtainable. To reinforce the nickel shell it is backed up with different materials (copper, plastic, etc.) to meet different applications. A sufficient thickness of copper allows for machining a flat surface to enable the cavity to be mounted into a cavity pocket. 

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