The anisotropically phase-segregated CoPd sulfide nanoparticles, named "CoPd nanoacorns", were spontaneously generated by reducing the corresponding metal precursors with 1,2-hexadecanediol in the presence of various alkanethiols. The CoPd nanoacorn consisting of crystalline Co9S8 and amorphous PdSx phases with the Co9S8 (001) plane at their interface was found to spontaneously form through the anisotropic growth of the Co9S8 phase after the generation of PdSx nanoparticles.
Stability of anisotropically phase-segregated Co9S8/PdSx nanoacorns, which we recently prepared, was improved by the addition of oleic acid or oleylamine as a stabilizer. Further investigations on the experimental conditions implied the formation of more complex PdSx/Co9S8/PdSx and Co9S8/PdSx/Co9S8 heterostructured nanoparticles.
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