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Title
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Morphological and chemical transformations of single silica-coated CdSe/CdS nanorods upon fs-laser excitation
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Author
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Abstract
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| Radiation-induced modifications of nanostructures are of fundamental interest and constitute a viable out-of-equilibrium approach to the development of novel nanomaterials. Herein, we investigated the structural transformation of silica-coated CdSe/CdS nanorods (NRs) under femtosecond (fs) illumination. By comparing the same nanorods before and after illumination with different fluences we found that the silica-shell did not only enhance the stability of the NRs but that the confinement of the NRs also led to novel morphological and chemical transformations. Whereas uncoated CdSe/CdS nanorods were found to sublimate under such excitations the silica-coated nanorods broke into fragments which deformed towards a more spherical shape. Furthermore, CdS decomposed which led to the formation of metallic Cd, confirmed by high-resolution electron microscopy and energy dispersive X-ray spectrometry (EDX), whereby an epitaxial interface with the remaining CdS lattice was formed. Under electron beam exposure similar transformations were found to take place which we followed in situ. |
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Language
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English
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Source (journal)
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Nanoscale / Royal Society of Chemistry [London] - Cambridge, 2009, currens
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Publication
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Cambridge
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2017
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ISSN
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2040-3364
[print]
2040-3372
[online]
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DOI
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10.1039/C6NR09879G
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Volume/pages
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9
:14
(2017)
, p. 4810-4818
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ISI
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000398954800022
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Pubmed ID
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28352861
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Full text (Publisher's DOI)
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Full text (open access)
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