Publikation:

Mesocrystal to Single Crystal Transformation of d,l-Alanine Evidenced by Small Angle Neutron Scattering

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2007

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Schwahn, Dietmar
Ma, Yurong

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https://doi.org/10.1021/jp068813i
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The Journal of Physical Chemistry C. 2007, 111(8), pp. 3224-3227. ISSN 1932-7447. eISSN 1932-7455. Available under: doi: 10.1021/jp068813i

Zusammenfassung

The formation of d,l-alanine mesocrystals and their transformation into a single crystal was investigated by time-resolved small angle neutron scattering (SANS) and dynamic light scattering (DLS). Whereas DLS was able to monitor the early nanoparticle growth stages and the initial aggregation process to a mesocrystal, which was shown to scatter like a single crystal in a previous study, SANS was able to characterize the micron sized nanoparticle superstructure:  the mesocrystal. With time, the mesocrystal structure became compact as evidenced by a transition from the Q-3 power law behavior characteristic for aggregates with inner surface in the beginning and later a transition to Q-4 behavior characteristic for compact particles:  the single crystal. This is the first time-resolved experimental evidence that a compact single crystal can be formed by transformation of a mesocrystal nanoparticle aggregate by crystallographic fusion of the building units.

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ISO 690SCHWAHN, Dietmar, Yurong MA, Helmut CÖLFEN, 2007. Mesocrystal to Single Crystal Transformation of d,l-Alanine Evidenced by Small Angle Neutron Scattering. In: The Journal of Physical Chemistry C. 2007, 111(8), pp. 3224-3227. ISSN 1932-7447. eISSN 1932-7455. Available under: doi: 10.1021/jp068813i
BibTex
@article{Schwahn2007Mesoc-40372,
  year={2007},
  doi={10.1021/jp068813i},
  title={Mesocrystal to Single Crystal Transformation of d,l-Alanine Evidenced by Small Angle Neutron Scattering},
  number={8},
  volume={111},
  issn={1932-7447},
  journal={The Journal of Physical Chemistry C},
  pages={3224--3227},
  author={Schwahn, Dietmar and Ma, Yurong and Cölfen, Helmut}
}
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