Specific functionalization of CTAB stabilized anisotropic gold nanoparticles with polypeptides for folding-mediated self-assembly

Anisotropic nanoparticles stabilized by cetyltrimethylammonium bromide (CTAB) are notoriously difficult to homogenously functionalize using conventional gold–thiol chemistry. Using surface assisted laser desorption time of flight mass spectroscopy and scanning transmission electron microscopy-energy...

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Main Authors: Wang, Yusong, Aili, Daniel, Selegård, Robert, Tay, Yee Yan, Baltzer, Lars, Zhang, Hua, Bo, Liedberg
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2013
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Online Access:https://hdl.handle.net/10356/96386
http://hdl.handle.net/10220/11504
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-963862020-06-01T10:26:30Z Specific functionalization of CTAB stabilized anisotropic gold nanoparticles with polypeptides for folding-mediated self-assembly Wang, Yusong Aili, Daniel Selegård, Robert Tay, Yee Yan Baltzer, Lars Zhang, Hua Bo, Liedberg School of Materials Science & Engineering DRNTU::Engineering::Materials Anisotropic nanoparticles stabilized by cetyltrimethylammonium bromide (CTAB) are notoriously difficult to homogenously functionalize using conventional gold–thiol chemistry. Using surface assisted laser desorption time of flight mass spectroscopy and scanning transmission electron microscopy-energy dispersive X-ray spectroscopy, we demonstrate that silver species adsorbed on the particle surface prevent effective surface functionalization. When covered by a thin gold film, particle functionalization was drastically improved. A thiol-containing polypeptide was immobilized on arrowhead gold nanorods (NRs) and was subsequently able to selectively heteroassociate with a complementary polypeptide resulting in a folding-mediated bridging aggregation of the NRs. Despite using arrowhead NRs with a pronounced difference in surface arrangement on the {111} facets on the arrowheads compared to the {100} facets at the particle sides, the polypeptides were efficiently and homogeneously immobilized on the particles after gold film overgrowth. 2013-07-16T02:32:51Z 2019-12-06T19:29:45Z 2013-07-16T02:32:51Z 2019-12-06T19:29:45Z 2012 2012 Journal Article Wang, Y., Aili, D., Selegård, R., Tay, Y. Y., Baltzer, L., Zhang, H., et al. (2012). Specific functionalization of CTAB stabilized anisotropic gold nanoparticles with polypeptides for folding-mediated self-assembly. Journal of materials chemistry, 22(38), 20368-20373. https://hdl.handle.net/10356/96386 http://hdl.handle.net/10220/11504 10.1039/c2jm31176c en Journal of materials chemistry © 2012 The Royal Society of Chemistry.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Materials
spellingShingle DRNTU::Engineering::Materials
Wang, Yusong
Aili, Daniel
Selegård, Robert
Tay, Yee Yan
Baltzer, Lars
Zhang, Hua
Bo, Liedberg
Specific functionalization of CTAB stabilized anisotropic gold nanoparticles with polypeptides for folding-mediated self-assembly
description Anisotropic nanoparticles stabilized by cetyltrimethylammonium bromide (CTAB) are notoriously difficult to homogenously functionalize using conventional gold–thiol chemistry. Using surface assisted laser desorption time of flight mass spectroscopy and scanning transmission electron microscopy-energy dispersive X-ray spectroscopy, we demonstrate that silver species adsorbed on the particle surface prevent effective surface functionalization. When covered by a thin gold film, particle functionalization was drastically improved. A thiol-containing polypeptide was immobilized on arrowhead gold nanorods (NRs) and was subsequently able to selectively heteroassociate with a complementary polypeptide resulting in a folding-mediated bridging aggregation of the NRs. Despite using arrowhead NRs with a pronounced difference in surface arrangement on the {111} facets on the arrowheads compared to the {100} facets at the particle sides, the polypeptides were efficiently and homogeneously immobilized on the particles after gold film overgrowth.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Wang, Yusong
Aili, Daniel
Selegård, Robert
Tay, Yee Yan
Baltzer, Lars
Zhang, Hua
Bo, Liedberg
format Article
author Wang, Yusong
Aili, Daniel
Selegård, Robert
Tay, Yee Yan
Baltzer, Lars
Zhang, Hua
Bo, Liedberg
author_sort Wang, Yusong
title Specific functionalization of CTAB stabilized anisotropic gold nanoparticles with polypeptides for folding-mediated self-assembly
title_short Specific functionalization of CTAB stabilized anisotropic gold nanoparticles with polypeptides for folding-mediated self-assembly
title_full Specific functionalization of CTAB stabilized anisotropic gold nanoparticles with polypeptides for folding-mediated self-assembly
title_fullStr Specific functionalization of CTAB stabilized anisotropic gold nanoparticles with polypeptides for folding-mediated self-assembly
title_full_unstemmed Specific functionalization of CTAB stabilized anisotropic gold nanoparticles with polypeptides for folding-mediated self-assembly
title_sort specific functionalization of ctab stabilized anisotropic gold nanoparticles with polypeptides for folding-mediated self-assembly
publishDate 2013
url https://hdl.handle.net/10356/96386
http://hdl.handle.net/10220/11504
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