KIT | KIT-Bibliothek | Impressum | Datenschutz

Real-time direct transmission electron microscopy imaging of phase and morphology transformation from solid indium oxide hydroxide to hollow corundum-type indium oxide nanocrystallites

Schlicker, Lukas; Popescu, Radian 1; Bekheet, Maged F.; Doran, Andrew; Gerthsen, Dagmar 1; Gurlo, Aleksander
1 Laboratorium für Elektronenmikroskopie (LEM), Karlsruher Institut für Technologie (KIT)

Abstract:

A time-resolved series of high-resolution transmission electron microscopy (HRTEM) images are used to monitor phase and morphology transformation of rod-like and spherical particles with the initial ortho-rhombic In OOH phase in situ under continuous illumination with high-energy electrons in a transmission electron microscope. For both particle types, the electron-beam irradiation induces a fast InOOH to rh-In₂O₃ decomposition accompanied by the formation of voids within the particle/rod center. After illu-mination time intervals of about 1–2 min (i.e.electron dose 6.3–12.6 × 10⁷enm¯²) for particles and8 min (4.3 × 108enm¯²) for rods, respectively, several small empty cavities become visible in the particle/rod center. The cavities coalesce and form a large hollow space/canal after further illumination. Time-resolved in situ HRTEM unambiguously shows that the formation of internal voids in both nano particle types is a consequence of the structural InOOH-to-rh-In₂O₃ phase transition that starts at the surface of the corresponding particle. The as-formed oxide phase encapsulates the untransformed hydroxylated phase. Its decomposition does not follow the Kirkendall mechanism; the matter transferred outwards is removed in the form of water, leading to void formation inside without an increase of the particle size.

Zugehörige Institution(en) am KIT Laboratorium für Elektronenmikroskopie (LEM)
Universität Karlsruhe (TH) – Zentrale Einrichtungen (Zentrale Einrichtungen)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2040-3364, 2040-3372
KITopen-ID: 1000099565
Erschienen in Nanoscale
Verlag Royal Society of Chemistry (RSC)
Band 11
Heft 25
Seiten 12242–12249
Vorab online veröffentlicht am 31.05.2019
Nachgewiesen in Dimensions
Scopus
Web of Science

Verlagsausgabe §
DOI: 10.5445/IR/1000099565
Veröffentlicht am 04.11.2019
Originalveröffentlichung
DOI: 10.1039/c9nr02115a
Scopus
Zitationen: 4
Web of Science
Zitationen: 3
Dimensions
Zitationen: 3
Seitenaufrufe: 270
seit 05.11.2019
Downloads: 162
seit 05.11.2019
Cover der Publikation
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page