The Ag−Au−Ag heterometallic nanorods were synthesized epitaxially though directed anisotropic overgrowth from multiply twinned gold decahedrons and rods. The silver segments were stoichiometrically converted to Ag 2 S by reaction with sulfide ions, generating Ag 2 S−Au−Ag 2 S heterojunction nanorods.
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Seo et al. (2008) studied this question.
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