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Controlling the sel...
Controlling the self-assembly and optical properties of gold nanoclusters and gold nanoparticles biomineralized with bovine serum albumin
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McDonagh, Birgitte H (author)
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Singh, Gurvinder (author)
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Bandyopadhyay, Sulalit (author)
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Lystvet, Sina M (author)
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Ryan, Joseph A (author)
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Volden, Sondre (author)
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Kim, Eugene (author)
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Sandvig, Ioanna (author)
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- Sandvig, Axel (author)
- Umeå universitet,Klinisk neurovetenskap,Department of Neuroscience, Faculty of Medicine, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
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Glomm, Wilhelm R (author)
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(creator_code:org_t)
- 2015
- 2015
- English.
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In: RSC Advances. - : Royal Society of Chemistry. - 2046-2069. ; 5:122, s. 101101-101109
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- While the size-dependent optical properties of BSA-stabilized gold nanoclusters are well known, the timedependent growth mechanism remains to be described. Herein, we systematically compare two synthesis methods with and without ascorbic acid, and show that tuning of BSA-stabilized gold nanoclusters (AuNCs) of different sizes can be performed without the aid of an extrinsic reducing agent and with good reproducibility. We also show that adding ascorbic acid yields larger BSA-stabilized gold nanoparticles (AuNPs), and that AuNPs can only form above a threshold gold precursor concentration. Using computed tomography, we describe how these biomineralized AuNPs show size-dependent X-ray attenuation. Growth of BSA-stabilized AuNCs and AuNPs, over a range of gold precursor concentrations, was followed with steady-state fluorescence and UV-vis spectroscopy for one week, constituting the first study of its kind. Based on our results, we propose a mechanism for BSA-stabilization of AuNCs and AuNPs that can further aid in selective growth of discrete AuNCs and AuNPs.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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McDonagh, Birgit ...
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Singh, Gurvinder
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Bandyopadhyay, S ...
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Lystvet, Sina M
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Ryan, Joseph A
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Volden, Sondre
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show more...
-
Kim, Eugene
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Sandvig, Ioanna
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Sandvig, Axel
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Glomm, Wilhelm R
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
- Articles in the publication
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RSC Advances
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Umeå University