Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/96386
Title: Specific functionalization of CTAB stabilized anisotropic gold nanoparticles with polypeptides for folding-mediated self-assembly
Authors: Wang, Yusong
Aili, Daniel
Selegård, Robert
Tay, Yee Yan
Baltzer, Lars
Zhang, Hua
Bo, Liedberg
Keywords: DRNTU::Engineering::Materials
Issue Date: 2012
Source: 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.
Series/Report no.: Journal of materials chemistry
Abstract: 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.
URI: https://hdl.handle.net/10356/96386
http://hdl.handle.net/10220/11504
DOI: 10.1039/c2jm31176c
Rights: © 2012 The Royal Society of Chemistry.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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