Depletion sphere : explaining the number of Ag islands on Au nanoparticles
We report multi-site nucleation and growth of Ag islands on colloidal Au nanoparticles. By modifying a single factor, a range of products from Janus nanoparticles to satellite nanostructures are obtained. The identification of these key factors reveals the correlation between the concentration gradi...
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sg-ntu-dr.10356-877662023-02-28T19:34:59Z Depletion sphere : explaining the number of Ag islands on Au nanoparticles Feng, Yuhua Wang, Yawen Song, Xiaohui Xing, Shuangxi Chen, Hongyu School of Physical and Mathematical Sciences Nanoparticles Depletion Sphere We report multi-site nucleation and growth of Ag islands on colloidal Au nanoparticles. By modifying a single factor, a range of products from Janus nanoparticles to satellite nanostructures are obtained. The identification of these key factors reveals the correlation between the concentration gradient and the choice of nucleation sites. In contrast to the inhibited homogeneous nucleation in the bulk solution, we argue that the non-steady-state concentration gradient plays a critical role in inhibiting nucleation within nanometer distance during the initial stage of growth—an essential but not yet recognized factor in colloidal synthesis. A depletion sphere model was developed, so that the multi-site nucleation is well integrated with the classic theory of nucleation and growth. Alternative explanations are carefully examined and ruled out. We believe that the synthetic know-how and the mechanistic insights can be broadly applied and are of importance to the advance of nanosynthesis. ASTAR (Agency for Sci., Tech. and Research, S’pore) MOE (Min. of Education, S’pore) Published version 2018-08-07T06:41:06Z 2019-12-06T16:49:00Z 2018-08-07T06:41:06Z 2019-12-06T16:49:00Z 2017 Journal Article Feng, Y., Wang, Y., Song, X., Xing, S., & Chen, H. (2017). Depletion sphere : explaining the number of Ag islands on Au nanoparticles. Chemical Science, 8(1), 430-436. 2041-6520 https://hdl.handle.net/10356/87766 http://hdl.handle.net/10220/45517 10.1039/C6SC02276F en Chemical Science © 2017 The Royal Society of Chemistry. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. 7 p. application/pdf |
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Nanoparticles Depletion Sphere Feng, Yuhua Wang, Yawen Song, Xiaohui Xing, Shuangxi Chen, Hongyu Depletion sphere : explaining the number of Ag islands on Au nanoparticles |
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We report multi-site nucleation and growth of Ag islands on colloidal Au nanoparticles. By modifying a single factor, a range of products from Janus nanoparticles to satellite nanostructures are obtained. The identification of these key factors reveals the correlation between the concentration gradient and the choice of nucleation sites. In contrast to the inhibited homogeneous nucleation in the bulk solution, we argue that the non-steady-state concentration gradient plays a critical role in inhibiting nucleation within nanometer distance during the initial stage of growth—an essential but not yet recognized factor in colloidal synthesis. A depletion sphere model was developed, so that the multi-site nucleation is well integrated with the classic theory of nucleation and growth. Alternative explanations are carefully examined and ruled out. We believe that the synthetic know-how and the mechanistic insights can be broadly applied and are of importance to the advance of nanosynthesis. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Feng, Yuhua Wang, Yawen Song, Xiaohui Xing, Shuangxi Chen, Hongyu |
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Article |
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Feng, Yuhua Wang, Yawen Song, Xiaohui Xing, Shuangxi Chen, Hongyu |
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Feng, Yuhua |
title |
Depletion sphere : explaining the number of Ag islands on Au nanoparticles |
title_short |
Depletion sphere : explaining the number of Ag islands on Au nanoparticles |
title_full |
Depletion sphere : explaining the number of Ag islands on Au nanoparticles |
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Depletion sphere : explaining the number of Ag islands on Au nanoparticles |
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Depletion sphere : explaining the number of Ag islands on Au nanoparticles |
title_sort |
depletion sphere : explaining the number of ag islands on au nanoparticles |
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2018 |
url |
https://hdl.handle.net/10356/87766 http://hdl.handle.net/10220/45517 |
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1759856201291530240 |