Displacement deposition characterized

Some mention should be made concerning the state of the polymer at the beginning of TLC experiment. Normally the sample is applied to the plate from solution in a relatively nonpolar solvent. This solvent is then evaporated, and the chromatographic plate is eluted with the chosen eluent. The drying step results in a polymer deposit which would be difficult to characterize it is not simply a precipitate, and it probably is not a simple adsorbed (multi) layer. Redissolution and entry into the mobile phase under displacement conditions occur in a minute or less (13). 

A characterization of copper/porous silicon (Cu/PS) nanocomposites fomied by an immersion displacement method is presented. Morphology and structural properties of Cu-PS samples were analyzed using SEM and XRD techniques. The SEM study demonstrates the complicated structure of the Cu/PS samples. The XRD study confirms that deposited Cu is polycrystalline. Copper deposition time has a strong influence on Cu crystal size and the Cu/PS composition. 

When displacement reactions are associated with electroless deposition of silver, exotic coaxially-organized heterostructures, characterized by hybrid chemical compositions, are generated [17, 125]. The heterostructures present a concentric topology of the various metals, a sort of Matrioshka arrangement known as nanorattles as defined by the same authors [17], Different shape and material configurations have been reported in literature, for instance onto spherical AuAg alloy core NCs, Ag could be deposited by chemical reduction promoted by ascorbic acid at high temperatures and water environment, afterwards, a redox displacement HAuCU-promoted altered the silver shell composition... 

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