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

Schwahn, Dietmar; Ma, Yurong; Cölfen, Helmut

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

Dateien

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Datum

2007

Autor:innen

Schwahn, Dietmar

Ma, Yurong

Cölfen, Helmut

DOI (zitierfähiger Link)

https://doi.org/10.1021/jp068813i

Sammlungen

Chemie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen 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

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.

Fachgebiet (DDC)

540 Chemie

Zitieren

ISO 690

SCHWAHN, 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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