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Morphologies of the product obtained after thermal evaporations of Fe and Si. (a) Low magnification of the product under FESEM, in which nanorods and self-assembled heliotropeslike microarchitectures are seen. [(b)–(h)] High magnification FESEM image of different single heliotrope with composed of assembled flexural nanowires.
(a) Low magnification TEM image of a single heliotrope, (b) TEM image of the petals, (c) HRTEM image, and (d) the corresponding SAED pattern from the petals.
(Color online) (a) TEM images of one single microheliotrope with some petals streched during sonication, (b) TEM image of the remained belt shaped SiO petals, (c) EDS analysis at the central core, and (d) EDS spectra recorded from the assembled nanowires, as shown in (b).
(Color online) Schematic illustration for the possible growth mechanism of the elegant heliotropelike composed of assembled flexural nanowires arrays.
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