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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Main Authors: Feng, Yuhua, Wang, Yawen, Song, Xiaohui, Xing, Shuangxi, Chen, Hongyu
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2018
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Online Access:https://hdl.handle.net/10356/87766
http://hdl.handle.net/10220/45517
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Institution: Nanyang Technological University
Language: English
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spelling 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
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Nanoparticles
Depletion Sphere
spellingShingle Nanoparticles
Depletion Sphere
Feng, Yuhua
Wang, Yawen
Song, Xiaohui
Xing, Shuangxi
Chen, Hongyu
Depletion sphere : explaining the number of Ag islands on Au nanoparticles
description 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.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Feng, Yuhua
Wang, Yawen
Song, Xiaohui
Xing, Shuangxi
Chen, Hongyu
format Article
author Feng, Yuhua
Wang, Yawen
Song, Xiaohui
Xing, Shuangxi
Chen, Hongyu
author_sort 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
title_fullStr Depletion sphere : explaining the number of Ag islands on Au nanoparticles
title_full_unstemmed Depletion sphere : explaining the number of Ag islands on Au nanoparticles
title_sort depletion sphere : explaining the number of ag islands on au nanoparticles
publishDate 2018
url https://hdl.handle.net/10356/87766
http://hdl.handle.net/10220/45517
_version_ 1759856201291530240