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Role of Halides in the Ordered Structure Transitions of Heated Gold Nanocrystal Superlattices
[Image: see text] Dodecanethiol-capped gold (Au) nanocrystal superlattices can undergo a surprisingly diverse series of ordered structure transitions when heated (Goodfellow, B. W.; Rasch, M. R.; Hessel, C. M.; Patel, R. N.; Smilgies, D.-M.; Korgel, B. A. Nano Lett.2013, 13, 5710–5714). These are th...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American
Chemical Society
2015
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4479963/ https://www.ncbi.nlm.nih.gov/pubmed/26013597 http://dx.doi.org/10.1021/acs.langmuir.5b01498 |
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author | Yu, Yixuan Goodfellow, Brian W. Rasch, Michael R. Bosoy, Christian Smilgies, Detlef-M. Korgel, Brian A. |
author_facet | Yu, Yixuan Goodfellow, Brian W. Rasch, Michael R. Bosoy, Christian Smilgies, Detlef-M. Korgel, Brian A. |
author_sort | Yu, Yixuan |
collection | PubMed |
description | [Image: see text] Dodecanethiol-capped gold (Au) nanocrystal superlattices can undergo a surprisingly diverse series of ordered structure transitions when heated (Goodfellow, B. W.; Rasch, M. R.; Hessel, C. M.; Patel, R. N.; Smilgies, D.-M.; Korgel, B. A. Nano Lett.2013, 13, 5710–5714). These are the result of highly uniform changes in nanocrystal size, which subsequently force a spontaneous rearrangement of superlattice structure. Here, we show that halide-containing surfactants play an essential role in these transitions. In the absence of any halide-containing surfactant, superlattices of dodecanethiol-capped (1.9-nm-diameter) Au nanocrystals do not change size until reaching about 190–205 °C, at which point the gold cores coalesce. In the presence of halide-containing surfactant, such as tetraoctylphosphonium bromide (TOPB) or tetraoctylammounium bromide (TOAB), the nanocrystals ripen at much lower temperature and superlattices undergo various ordered structure transitions upon heating. Chloride- and iodide-containing surfactants induce similar behavior, destabilizing the Au–thiol bond and reducing the thermal stability of the nanocrystals. |
format | Online Article Text |
id | pubmed-4479963 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | American
Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-44799632015-07-01 Role of Halides in the Ordered Structure Transitions of Heated Gold Nanocrystal Superlattices Yu, Yixuan Goodfellow, Brian W. Rasch, Michael R. Bosoy, Christian Smilgies, Detlef-M. Korgel, Brian A. Langmuir [Image: see text] Dodecanethiol-capped gold (Au) nanocrystal superlattices can undergo a surprisingly diverse series of ordered structure transitions when heated (Goodfellow, B. W.; Rasch, M. R.; Hessel, C. M.; Patel, R. N.; Smilgies, D.-M.; Korgel, B. A. Nano Lett.2013, 13, 5710–5714). These are the result of highly uniform changes in nanocrystal size, which subsequently force a spontaneous rearrangement of superlattice structure. Here, we show that halide-containing surfactants play an essential role in these transitions. In the absence of any halide-containing surfactant, superlattices of dodecanethiol-capped (1.9-nm-diameter) Au nanocrystals do not change size until reaching about 190–205 °C, at which point the gold cores coalesce. In the presence of halide-containing surfactant, such as tetraoctylphosphonium bromide (TOPB) or tetraoctylammounium bromide (TOAB), the nanocrystals ripen at much lower temperature and superlattices undergo various ordered structure transitions upon heating. Chloride- and iodide-containing surfactants induce similar behavior, destabilizing the Au–thiol bond and reducing the thermal stability of the nanocrystals. American Chemical Society 2015-05-27 2015-06-23 /pmc/articles/PMC4479963/ /pubmed/26013597 http://dx.doi.org/10.1021/acs.langmuir.5b01498 Text en Copyright © 2015 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Yu, Yixuan Goodfellow, Brian W. Rasch, Michael R. Bosoy, Christian Smilgies, Detlef-M. Korgel, Brian A. Role of Halides in the Ordered Structure Transitions of Heated Gold Nanocrystal Superlattices |
title | Role of Halides in the Ordered Structure Transitions
of Heated Gold Nanocrystal Superlattices |
title_full | Role of Halides in the Ordered Structure Transitions
of Heated Gold Nanocrystal Superlattices |
title_fullStr | Role of Halides in the Ordered Structure Transitions
of Heated Gold Nanocrystal Superlattices |
title_full_unstemmed | Role of Halides in the Ordered Structure Transitions
of Heated Gold Nanocrystal Superlattices |
title_short | Role of Halides in the Ordered Structure Transitions
of Heated Gold Nanocrystal Superlattices |
title_sort | role of halides in the ordered structure transitions
of heated gold nanocrystal superlattices |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4479963/ https://www.ncbi.nlm.nih.gov/pubmed/26013597 http://dx.doi.org/10.1021/acs.langmuir.5b01498 |
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