Issue 10, 2012

Unconventional vapor–liquid–solid mechanism of ultra-long Ba6Mn24O48 whiskers growth from chloride fluxes

Abstract

Isothermal growth in evaporating salt fluxes allowed the reproducible and high-yield synthesis of unique submicron-thick and millimeter-long manganese-rich Ba6Mn24O48 whiskers with a composite tunnel crystal structure. The crystals morphology and growth conditions suggest that the whiskers proliferate by an unusual mechanism based on a transport reaction of MnCl2 vapor, its oxidation into manganese oxides and interaction with a BaCl2-containing melt film wetting the whisker bodies. Thin fibers of Ba6Mn24O48 were found to grow mostly in the [001] direction parallel to their structural tunnels. A simple acid leaching splits the whiskers into flexible 20–50 nm thick nanofibers and converts them simultaneously into a protonated form favoring one-dimensional ionic conductivity.

Graphical abstract: Unconventional vapor–liquid–solid mechanism of ultra-long Ba6Mn24O48 whiskers growth from chloride fluxes

Supplementary files

Article information

Article type
Paper
Submitted
07 Jan 2012
Accepted
21 Feb 2012
First published
22 Feb 2012

CrystEngComm, 2012,14, 3778-3786

Unconventional vapor–liquid–solid mechanism of ultra-long Ba6Mn24O48 whiskers growth from chloride fluxes

E. A. Pomerantseva, E. A. Goodilin and Y. D. Tretyakov, CrystEngComm, 2012, 14, 3778 DOI: 10.1039/C2CE00028H

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