Send to:

Choose Destination
See comment in PubMed Commons below
Dalton Trans. 2013 Sep 21;42(35):12596-9. doi: 10.1039/c3dt50803j.

(NH4)2S, a highly reactive molecular precursor for low temperature anion exchange reactions in nanoparticles.

Author information

  • 1Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA.


Ammonium sulfide ((NH4)2S) exhibits high reactivity as a sulfide reagent in anion exchange reactions that transform CoO to cobalt sulfide nanoparticles (NPs). The faster diffusion of Co(2+) and O(2-) than the incoming S(2-) during the anion exchange causes a significant expansion of the NP voids. The low temperature (70 °C) anion exchange reaction produces amorphous cobalt sulfide NPs with Co : S ratio of ca. 3 : 4, which are converted into crystalline NPs with a major phase of cubic Co3S4 by annealing at high temperature in an organic solution.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Royal Society of Chemistry
    Loading ...
    Write to the Help Desk