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Metal sulfide cores self-encapsulated in shells of the same material are formed via the in-situ source–template interface reaction route described by these authors. In this method, reaction occurs at the static organic/aqueous interface to produce peanut-shaped nanostructures of either CdS or ZnS (see Figure). A mechanism for the formation of these novel structures is proposed.
Xie et al. (2000) studied this question.