Crystal Shape Engineering of Silicon Nanoparticles in a Thermal Aerosol Reactor

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Koermer R, Butz B, Spiecker E, Peukert W
Zeitschrift: Crystal Growth & Design
Verlag: American Chemical Society
Jahr der Veröffentlichung: 2012
Band: 12
Heftnummer: 3
Seitenbereich: 1330--1336
ISSN: 1528-7483


Abstract


In this work, the capability of gas phase synthesis for crystal shape engineering of silicon nanoparticles (SiNP) in a hot wall reactor is demonstrated. Therefore, the necessary boundary conditions for the formation of monodisperse spherical SiNP as well as octahedral shaped particles from silane pyrolysis are systematically deduced. The different shapes of the SiNP are ascribed to different growth regimes (reaction limitation, diffusion limitation) depending on the global process parameters. Single crystalline, defect-free, spherical particles with a mean diameter of 30 nm (geometric standard deviation below 1.1) and octahedra with a mean edge length of about 100 nm could be obtained solely by process parameter adjustment. Particle size and shape as well as crystallinity were characterized by scanning electron microscopy and X-ray diffraction. The inner structure and faceting of the particles was analyzed in detail by high resolution transmission electron microscopy. A model which elucidates the orientation relation between inner silicon structure and the particle shape is derived for the octahedra.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Butz, Benjamin Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Peukert, Wolfgang Prof. Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)


Forschungsbereiche

A1 Functional Particle Systems
Exzellenz-Cluster Engineering of Advanced Materials
A2 Nanoanalysis and Microscopy
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Koermer, R., Butz, B., Spiecker, E., & Peukert, W. (2012). Crystal Shape Engineering of Silicon Nanoparticles in a Thermal Aerosol Reactor. Crystal Growth & Design, 12(3), 1330--1336. https://dx.doi.org/10.1021/cg201394y

MLA:
Koermer, Richard, et al. "Crystal Shape Engineering of Silicon Nanoparticles in a Thermal Aerosol Reactor." Crystal Growth & Design 12.3 (2012): 1330--1336.

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