pH-Driven Reversible Assembly and Disassembly of Colloidal Gold Nanoparticles
Owing to the localized surface plasmon resonance (LSPR), dynamic manipulation of optical properties through the structure evolution of plasmonic nanoparticles has been intensively studied for practical applications. This paper describes a novel method for direct reversible self-assembly and dis-asse...
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doaj-e904243d8e614b10b564995a336f55dc2021-04-29T05:21:22ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462021-04-01910.3389/fchem.2021.675491675491pH-Driven Reversible Assembly and Disassembly of Colloidal Gold NanoparticlesYun Liu0Weihua Fu1Zhongsheng Xu2Liang Zhang3Tao Sun4Mengmeng Du5Xun Kang6Shilin Xiao7Chunyu Zhou8Mingfu Gong9Dong Zhang10Department of Radiology, Xinqiao Hospital, Army Medical University, Chongqing, ChinaDepartment of Urology, Xinqiao Hospital, Army Medical University, Chongqing, ChinaDepartment of Radiology, Xinqiao Hospital, Army Medical University, Chongqing, ChinaDepartment of Radiology, Xinqiao Hospital, Army Medical University, Chongqing, ChinaDepartment of Radiology, Xinqiao Hospital, Army Medical University, Chongqing, ChinaDepartment of Radiology, Xinqiao Hospital, Army Medical University, Chongqing, ChinaDepartment of Radiology, Xinqiao Hospital, Army Medical University, Chongqing, ChinaDepartment of Radiology, Xinqiao Hospital, Army Medical University, Chongqing, ChinaDepartment of Radiology, Xinqiao Hospital, Army Medical University, Chongqing, ChinaDepartment of Radiology, Xinqiao Hospital, Army Medical University, Chongqing, ChinaDepartment of Radiology, Xinqiao Hospital, Army Medical University, Chongqing, ChinaOwing to the localized surface plasmon resonance (LSPR), dynamic manipulation of optical properties through the structure evolution of plasmonic nanoparticles has been intensively studied for practical applications. This paper describes a novel method for direct reversible self-assembly and dis-assembly of Au nanoparticles (AuNPs) in water driven by pH stimuli. Using 3-aminopropyltriethoxysilane (APTES) as the capping ligand and pH-responsive agent, the APTES hydrolyzes rapidly in response to acid and then condenses into silicon. On the contrary, the condensed silicon can be broken down into silicate by base, which subsequently deprotonates the APTES on AuNPs. By controlling condensation and decomposition of APTES, the plasmonic coupling among adjacent AuNPs could be reversible tuned to display the plasmonic color switching. This study provides a facile and distinctive strategy to regulate the reversible self-assembly of AuNPs, and it also offers a new avenue for other plasmonic nanoparticles to adjust plasmonic properties via reversible self-assembly.https://www.frontiersin.org/articles/10.3389/fchem.2021.675491/fullgold nanoparticlesreversible self-assemblypH-responsiveplasmonic3-aminopropyltriethoxysilane |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yun Liu Weihua Fu Zhongsheng Xu Liang Zhang Tao Sun Mengmeng Du Xun Kang Shilin Xiao Chunyu Zhou Mingfu Gong Dong Zhang |
spellingShingle |
Yun Liu Weihua Fu Zhongsheng Xu Liang Zhang Tao Sun Mengmeng Du Xun Kang Shilin Xiao Chunyu Zhou Mingfu Gong Dong Zhang pH-Driven Reversible Assembly and Disassembly of Colloidal Gold Nanoparticles Frontiers in Chemistry gold nanoparticles reversible self-assembly pH-responsive plasmonic 3-aminopropyltriethoxysilane |
author_facet |
Yun Liu Weihua Fu Zhongsheng Xu Liang Zhang Tao Sun Mengmeng Du Xun Kang Shilin Xiao Chunyu Zhou Mingfu Gong Dong Zhang |
author_sort |
Yun Liu |
title |
pH-Driven Reversible Assembly and Disassembly of Colloidal Gold Nanoparticles |
title_short |
pH-Driven Reversible Assembly and Disassembly of Colloidal Gold Nanoparticles |
title_full |
pH-Driven Reversible Assembly and Disassembly of Colloidal Gold Nanoparticles |
title_fullStr |
pH-Driven Reversible Assembly and Disassembly of Colloidal Gold Nanoparticles |
title_full_unstemmed |
pH-Driven Reversible Assembly and Disassembly of Colloidal Gold Nanoparticles |
title_sort |
ph-driven reversible assembly and disassembly of colloidal gold nanoparticles |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Chemistry |
issn |
2296-2646 |
publishDate |
2021-04-01 |
description |
Owing to the localized surface plasmon resonance (LSPR), dynamic manipulation of optical properties through the structure evolution of plasmonic nanoparticles has been intensively studied for practical applications. This paper describes a novel method for direct reversible self-assembly and dis-assembly of Au nanoparticles (AuNPs) in water driven by pH stimuli. Using 3-aminopropyltriethoxysilane (APTES) as the capping ligand and pH-responsive agent, the APTES hydrolyzes rapidly in response to acid and then condenses into silicon. On the contrary, the condensed silicon can be broken down into silicate by base, which subsequently deprotonates the APTES on AuNPs. By controlling condensation and decomposition of APTES, the plasmonic coupling among adjacent AuNPs could be reversible tuned to display the plasmonic color switching. This study provides a facile and distinctive strategy to regulate the reversible self-assembly of AuNPs, and it also offers a new avenue for other plasmonic nanoparticles to adjust plasmonic properties via reversible self-assembly. |
topic |
gold nanoparticles reversible self-assembly pH-responsive plasmonic 3-aminopropyltriethoxysilane |
url |
https://www.frontiersin.org/articles/10.3389/fchem.2021.675491/full |
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