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Star-shaped colloidal PbS nanocrystals: structural evolution and growth mechanism
Branched nanostructures have attracted considerable interest due to their large surface-to-volume ratio with benefits in photocatalysis and photovoltaic applications. Here we discuss the tailoring of branched structures with a shape of a star based on PbS semiconductor. It exposes the reaction mecha...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9041140/ https://www.ncbi.nlm.nih.gov/pubmed/35479867 http://dx.doi.org/10.1039/d1ra04402h |
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author | Abu-Hariri, Azhar Budniak, Adam K. Horani, Faris Lifshitz, Efrat |
author_facet | Abu-Hariri, Azhar Budniak, Adam K. Horani, Faris Lifshitz, Efrat |
author_sort | Abu-Hariri, Azhar |
collection | PubMed |
description | Branched nanostructures have attracted considerable interest due to their large surface-to-volume ratio with benefits in photocatalysis and photovoltaic applications. Here we discuss the tailoring of branched structures with a shape of a star based on PbS semiconductor. It exposes the reaction mechanism and the controlling factors that template their morphology. For this purpose, we varied the primary lead precursors, types of surfactant, lead-to-surfactant molar ratio, temperature and duration of the reaction. Furthermore, intermediate products in a growth reaction were thoroughly examined using X-ray diffraction, transmission electron microscopy, Raman scattering, optical absorbance and Fourier transform infrared spectroscopy. The results designated a primary formation of truncated octahedral seeds with terminating {100} and {111} facets, followed by the selective fast growth of pods along the 〈100〉 directions toward the development of a star-like shape. The examined intermediates possess a cubic rock salt structure. The observations indicated that small surfactant molecules (e.g. acetate) evolve the branching process, while long-chain surfactants (e.g. oleate) stabilize the long pods as well as mitigate the aggregation process. This study conveys fundamental knowledge for the design of other branched structures, that are attractive for practical use in catalysis, electrochemistry and light-harvesting. |
format | Online Article Text |
id | pubmed-9041140 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90411402022-04-26 Star-shaped colloidal PbS nanocrystals: structural evolution and growth mechanism Abu-Hariri, Azhar Budniak, Adam K. Horani, Faris Lifshitz, Efrat RSC Adv Chemistry Branched nanostructures have attracted considerable interest due to their large surface-to-volume ratio with benefits in photocatalysis and photovoltaic applications. Here we discuss the tailoring of branched structures with a shape of a star based on PbS semiconductor. It exposes the reaction mechanism and the controlling factors that template their morphology. For this purpose, we varied the primary lead precursors, types of surfactant, lead-to-surfactant molar ratio, temperature and duration of the reaction. Furthermore, intermediate products in a growth reaction were thoroughly examined using X-ray diffraction, transmission electron microscopy, Raman scattering, optical absorbance and Fourier transform infrared spectroscopy. The results designated a primary formation of truncated octahedral seeds with terminating {100} and {111} facets, followed by the selective fast growth of pods along the 〈100〉 directions toward the development of a star-like shape. The examined intermediates possess a cubic rock salt structure. The observations indicated that small surfactant molecules (e.g. acetate) evolve the branching process, while long-chain surfactants (e.g. oleate) stabilize the long pods as well as mitigate the aggregation process. This study conveys fundamental knowledge for the design of other branched structures, that are attractive for practical use in catalysis, electrochemistry and light-harvesting. The Royal Society of Chemistry 2021-09-15 /pmc/articles/PMC9041140/ /pubmed/35479867 http://dx.doi.org/10.1039/d1ra04402h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Abu-Hariri, Azhar Budniak, Adam K. Horani, Faris Lifshitz, Efrat Star-shaped colloidal PbS nanocrystals: structural evolution and growth mechanism |
title | Star-shaped colloidal PbS nanocrystals: structural evolution and growth mechanism |
title_full | Star-shaped colloidal PbS nanocrystals: structural evolution and growth mechanism |
title_fullStr | Star-shaped colloidal PbS nanocrystals: structural evolution and growth mechanism |
title_full_unstemmed | Star-shaped colloidal PbS nanocrystals: structural evolution and growth mechanism |
title_short | Star-shaped colloidal PbS nanocrystals: structural evolution and growth mechanism |
title_sort | star-shaped colloidal pbs nanocrystals: structural evolution and growth mechanism |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9041140/ https://www.ncbi.nlm.nih.gov/pubmed/35479867 http://dx.doi.org/10.1039/d1ra04402h |
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