Combined TEM-AFM study of “transrotational” spherulites growing in thin amorphous films

Kolosov, V. Yu.; Shvamm, K. L.; Гайнутдинов, Р. В.; Толстихина, А. Л.

doi:10.3103/s1062873807100280

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…The crystallites “roll” forward. This phenomenon was observed for Se, Fe 2 O 3 , and V 2 O 3 spherulites growing in thin (<100 nm) amorphous films. ,− …”

Section: Properties Of Spherulites and Factors Controlling Their Form...mentioning

confidence: 75%

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Spherulites

et al. 2011

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“…The crystallites “roll” forward. This phenomenon was observed for Se, Fe 2 O 3 , and V 2 O 3 spherulites growing in thin (<100 nm) amorphous films. ,− …”

Section: Properties Of Spherulites and Factors Controlling Their Form...mentioning

confidence: 75%

“…Nevertheless, there are some examples where the medium is probably best described as a solid. These include the following: selenium, , In 2 Se, Sb 2 Se 3 , α-Fe 2 O 3 , naphthalene derivates, and the dye 1,7-bis(dimethylamino)heptamethinium perchlorate …”

Section: Overview Of Spherulite Forming Substances and Growth Conditionsmentioning

confidence: 99%

Spherulites

et al. 2011

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“…Mit anderen Worten "rollen" die Kristallite in der Vorwärts-Wachstumsrichtung, sodass periodisch gebänderte Strukturen entstehen (Abbildung 33). Diese Erscheinung wurde unter anderem an Se-, [288,374,375] [378] und Ta 2 O 5 , [379] Ge-Te-, Tl-Se-und Cd-Te-Legierungen [380] sowie einkristallinen Cu-Te-Legierungen [381] beobachtet. [382] Der für solche Strukturen verantwortliche Wachstumsmechanismus ist nicht bekannt.…”

Section: Transrotationskristalleunclassified

Wachstumsinduziertes Biegen und Verwinden von Einkristallen

et al. 2014

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Kristalle von verschiedenen Stoffen, z. B. von Elementen, Mineralien, einfachen Salzen, organischen Molekülkristallen und hochmolekularen Polymeren, können die Translationsfernordnung aufgeben, indem sie sich während des Wachstums verwinden und verbiegen. Diese Erscheinungen wurden bei Kristallen im Größenbereich von Nano‐ bis Zentimetern beobachtet. Wir analysieren, wie und warum viele Materialien solche oft drastischen nichtkristallographischen Verzerrungen wählen und betonen dabei die Kristallchemie, die zu Spannungen an Oberflächen von Kristalliten oder innerhalb des Volumens führt.

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“…During the formation of spherulites, the fibrillar branches grow predominantly in radial directions from a common center point. Spherulites have been found in a wide range of solids from metals and alloys [1] to polymers [2], oxides [3,4], minerals [5,6], liquid crystals [7][8][9] and various biological molecules [10]. Quenching of a liquid may also lead to spherulite formation [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Real time imaging of two-dimensional iron oxide spherulite nanostructure formation

et al. 2019

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The formation of complex hierarchical nanostructures has attracted a lot of attention from both the fundamental science and potential applications point of view. Spherulite structures with radial fibrillar branches have been found in various solids; however, their growth mechanisms remain poorly understood. Here, we report real time imaging of the formation of twodimensional (2D) iron oxide spherulite nanostructures in a liquid cell using transmission electron microscopy (TEM). By tracking the growth trajectories, we show the characteristics of the reaction front and growth kinetics. Our observations reveal that the tip of a growing branch splits as the width exceeds certain sizes (5.5-8.5 nm). The radius of a spherulite nanostructure increases linearly with time at the early stage, transitioning to nonlinear growth at the later stage. Furthermore, a thin layer of solid is accumulated at the tip and nanoparticles from secondary nucleation also appear at the growing front which later develop into fibrillar branches. The spherulite nanostructure is polycrystalline with the co-existence of ferrihydrite and Fe 3O4 through-out the growth. A growth model is further established, which provides rational explanations on the linear growth at the early stage and the nonlinearity at the later stage of growth.

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Combined TEM-AFM study of “transrotational” spherulites growing in thin amorphous films

Cited by 6 publications

References 4 publications

Spherulites

Spherulites

Wachstumsinduziertes Biegen und Verwinden von Einkristallen

Real time imaging of two-dimensional iron oxide spherulite nanostructure formation

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