Template Selection Strategy for Synthesis of One-Dimensional CrSbSe3 Ferromagnetic Semiconductor Nanoribbons

Le résumé fourni par la source

CrSbSe 3 ─the only experimentally validated one-dimensional (1D) ferromagnetic semiconductor─has recently attracted significant attention. However, all reported synthesis methods for CrSbSe 3 nanocrystals are based on top-down methods. Here we report a template selection strategy for the bottom-up synthesis of CrSbSe 3 nanoribbons. This strategy relies on comparing the formation energies of potential binary templates to the ternary target product. It enables us to select Sb 2 Se 3 with the highest formation energy, along with its 1D crystal structure, as the template instead of Cr 2 Se 3 with the lowest formation energy, thereby facilitating the transformation from Sb 2 Se 3 to CrSbSe 3 by replacing half of the Sb atoms in Sb 2 Se 3 with Cr atoms. The as-prepared CrSbSe 3 nanoribbons exhibit a length of approximately 5 μm, a width ranging from 80 to 120 nm, and a thickness of about 5 nm. The single CrSbSe 3 nanoribbon presents typical semiconductor behavior and ferromagnetism, confirming the intrinsic ferromagnetism in the 1D CrSbSe 3 semiconductor.

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