A Shape-Induced Orientation Phase within 3D Nanocrystal Solids

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Burian M, Karner C, Yarema M, Heiß W, Amenitsch H, Dellago C, Lechner RT
Zeitschrift: Advanced Materials
Verlag: Wiley-VCH Verlag
Jahr der Veröffentlichung: 2018
Band: 30
Heftnummer: 32
ISSN: 0935-9648
Sprache: Englisch


Abstract

When nanocrystals self assemble into ordered superstructures they form functional solids
that may inherit the electronical properties of the single
nanocrystals. To what extent these properties are enhanced depends on
the positional and orientational order of the nanocrystals within the
superstructure. Here, the formation of micrometer-sized free-standing
supercrystals of faceted 20 nm Bi nanocrystals is investigated. The
self-assembly process, induced by nonsolvent into solvent diffusion, is
probed in situ by synchrotron X-ray scattering. The diffusion-gradient
is identified as the critical parameter for controlling the
supercrystal-structure as well as the alignment of the supercrystals
with respect to the substrate. Monte Carlo simulations confirm the
positional order of the nanocrystals within these superstructures and
reveal a unique orientation phase: the nanocrystal shape, determined by the atomic Bi crystal structure, induces a total of 6 global orientations based on facet-to-facet alignment. This parallel alignment of facets is a prerequisite for optimized electronic and optical properties within designed nanocrystal solids. © 2018 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


FAU-Autoren / FAU-Herausgeber

Heiß, Wolfgang Prof. Dr.
Professur für Werkstoffwissenschaften (lösungsprozessierte Halbleitermaterialien)


Autor(en) der externen Einrichtung(en)
École Polytechnique Fédérale de Lausanne (EPFL)
Medizinische Universität Wien
Montanuniversität Leoben
Technische Universität Graz


Zitierweisen

APA:
Burian, M., Karner, C., Yarema, M., Heiß, W., Amenitsch, H., Dellago, C., & Lechner, R.T. (2018). A Shape-Induced Orientation Phase within 3D Nanocrystal Solids. Advanced Materials, 30(32). https://dx.doi.org/10.1002/adma.201802078

MLA:
Burian, Max, et al. "A Shape-Induced Orientation Phase within 3D Nanocrystal Solids." Advanced Materials 30.32 (2018).

BibTeX: 

Zuletzt aktualisiert 2018-26-10 um 09:38