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Issue 26, 2015
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In situ investigation of two-step nucleation and growth of CdS nanoparticles from solution

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Abstract

We report on a combined ultra-fast in situ SAXS and WAXS study along a free-jet providing insight into the evolution of the morphology and crystalline structure of CdS quantum dots in the very early stage of nucleation between 100 μs and 2.5 ms with a time resolution down to 10 μs. Accessing this yet unexplored time regime provides direct evidence of a two-step mechanism via formation of prenucleation clusters followed by nanoparticle nucleation from coalescing precursors. Using ab initio calculations, the latter species is identified as Cd13S4(SH)18 clusters, the stability of which results from a compact surface and inner structure.

Graphical abstract: In situ investigation of two-step nucleation and growth of CdS nanoparticles from solution

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Publication details

The article was received on 12 Mar 2015, accepted on 16 May 2015 and first published on 18 May 2015


Article type: Paper
DOI: 10.1039/C5NR01602A
Citation: Nanoscale, 2015,7, 11328-11333
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    In situ investigation of two-step nucleation and growth of CdS nanoparticles from solution

    A. Schiener, A. Magerl, A. Krach, S. Seifert, H.-G. Steinrück, J. Zagorac, D. Zahn and R. Weihrich, Nanoscale, 2015, 7, 11328
    DOI: 10.1039/C5NR01602A

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