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231224s2017 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.6b04319
|2 doi
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|a DE-627
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|e rakwb
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|a eng
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|a Yang, Po-Wei
|e verfasserin
|4 aut
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|a Tracing the Surfactant-Mediated Nucleation, Growth, and Superpacking of Gold Supercrystals Using Time and Spatially Resolved X-ray Scattering
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|c 2017
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 15.05.2018
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|a Date Revised 15.05.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The nucleation and growth process of gold supercrystals in a surfactant diffusion approach is followed by simultaneous small- and wide-angle X-ray scattering (SAXS/WAXS), supplemented with scanning electron microscopy. The results indicate that supercrystal nucleation can be activated efficiently upon placing a concentrated surfactant solution of a nematic phase on top of a gold nanocrystal solution droplet trapped in the middle of a vertically oriented capillary tube. Supercrystal nuclei comprised of tens of gold nanocubes are observed nearly instantaneously in the broadened liquid-liquid interface zone of a steep gradient of surfactant concentration, revealing a diffusion-kinetics-controlled nucleation process. Once formed, the nuclei can sediment into the naoncrystal zone below, and grow efficiently into cubic or tetragonal supercrystals of ∼1 μm size within ∼100 min. Supercrystals matured during sedimentation in the capillary can accumulate and face-to-face align at the bottom liquid-air interface of the nanocrystal droplet. This is followed by superpacking of the supercrystals into highly oriented hierarchical sheets, with a huge number of gold nanocubes aligned for largely coherent crystallographic orientations
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Thoka, Subashchandrabose
|e verfasserin
|4 aut
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|a Lin, Po-Chang
|e verfasserin
|4 aut
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|a Su, Chun-Jen
|e verfasserin
|4 aut
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|a Sheu, Hwo-Shuenn
|e verfasserin
|4 aut
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|a Huang, Michael H
|e verfasserin
|4 aut
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|a Jeng, U-Ser
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1999
|g 33(2017), 13 vom: 04. Apr., Seite 3253-3261
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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|g volume:33
|g year:2017
|g number:13
|g day:04
|g month:04
|g pages:3253-3261
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|u http://dx.doi.org/10.1021/acs.langmuir.6b04319
|3 Volltext
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