Surfactant-Directed Synthesis of Branched Bismuth Telluride/Sulfide Core/Shell Nanorods


  • We gratefully acknowledge support from the Interconnect Focus Center funded by MARCO, DARPA, and NY state, the National Foundation under grants ECS 0501488 and DMR 0519081, and CTS 0348613, and a research initiation grant from Honda. Supporting Information is available online from Wiley InterScience or from the authors.


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Branched core/shell bismuth telluride/bismuth sulfide nanorod heterostructures are prepared by using a biomimetic surfactant, L-glutathionic acid. Trigonal nanocrystals of bismuth telluride are encapsulated by nanoscopic shells of orthorhombic bismuth sulfide. Crystallographic twinning causes shell branching. Such heteronanostructures are attractive for thermoelectric power generation and cooling applications.