Format:
Online-Ressource
ISSN:
1613-6829
Content:
Abstract: Controlled, bottom‐up self‐assembly of ordered and hierarchical structures remains a major challenge and increasingly attracts attention in basic and technology‐driven research. A simple process is described for the generation of such structures, which is based on slow solvent evaporation of a polymer solution blended with a crystal‐forming species (Krogmann’s salt). Upon drying, the viscosity of the polymer‐blend solution increases in a progressing solidification zone, which precisely controls crystal growth by limiting the transport of the crystallizing units through this gel‐like solidification zone and gives rise to a position‐ and time‐dependent diffusion rate. The progressing solidification zone also leads to a preferential crystallographic orientation on a centimeter scale and introduces an instability that drives spatial pattern formation and hierarchical ordering on five distinct levels, ranging from the atomic positions in crystals to the assembly on a microscale and up to a centimeter length scale. Together with a quantitative description, the presented findings are envisaged to improve the understanding and application of periodic precipitation processes.
In:
volume:7
In:
number:6
In:
year:2011
In:
pages:788-795
In:
extent:8
In:
Small, Weinheim : Wiley-VCH, [2005]-, 7, Heft 6 (2011), 788-795 (gesamt 8), 1613-6829
Language:
English
DOI:
10.1002/smll.201001432
URN:
urn:nbn:de:101:1-2023032106544896414441
URL:
https://doi.org/10.1002/smll.201001432
URL:
https://nbn-resolving.org/urn:nbn:de:101:1-2023032106544896414441
URL:
https://d-nb.info/1283940124/34
URL:
https://doi.org/10.1002/smll.201001432
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