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      Synthesis of Hierarchical Dorsal Spine\({\text{Ag}}_{\mathbf{\text{2}}}\text{S}\)Structures by a Solid-Vapor Reaction: The Effect of Reagent Gas Composition

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          Abstract

          Silver sulfide hierarchical structures with unique dorsal spine morphology were successfully synthesized on mechanically deformed silver substrates by simple solid-vapor reactions. It has been found that it is possible to change the structures morphology by changing the reagent gas composition. The carbon monoxide (CO) presence in a reactive sulfur atmosphere was found to be the key for growing the dorsal spine structures. In all cases, the Ag 2 S structures grew on the edge of the silver substrates where high plastic deformation occurred.

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          Chemistry and properties of nanocrystals of different shapes.

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            Investigations on Silver Sulfide

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              Conductance switching in Ag(2)S devices fabricated by in situ sulfurization.

              We report a simple and reproducible method to fabricate switchable Ag(2)S devices. The alpha-Ag(2)S thin films are produced by a sulfurization process after silver deposition on an Si substrate. Structure and composition of the Ag(2)S are characterized using XRD and RBS. Our samples show semiconductor behaviour at low bias voltages, whereas they exhibit reproducible bipolar resistance switching at higher bias voltages. The transition between both types of behaviour is observed by hysteresis in the I-V curves, indicating decomposition of the Ag(2)S, increasing the Ag(+) ion mobility. The as-fabricated Ag(2)S samples are a good candidate for future solid state memory devices, as they show reproducible memory resistive properties and they are fabricated by an accessible and reliable method.
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                Author and article information

                Journal
                Journal of Nanomaterials
                Journal of Nanomaterials
                Hindawi Limited
                1687-4110
                1687-4129
                2012
                2012
                : 2012
                :
                : 1-5
                Article
                10.1155/2012/749481
                2892a4cb-6148-40ae-baeb-04abf234b0b2
                © 2012

                http://creativecommons.org/licenses/by/3.0/

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