Please use this identifier to cite or link to this item: https://doi.org/10.1021/la200861e
Title: One-pot tuning of Au nucleation and growth: From nanoclusters to nanoparticles
Authors: Lai, S.-F.
Chen, W.-C.
Wang, C.-L.
Chen, H.-H.
Chen, S.-T.
Chien, C.-C.
Chen, Y.-Y.
Hung, W.-T.
Cai, X.
Li, E.
Kempson, I.M.
Hwu, Y.
Yang, C.S.
Tok, E.-S. 
Tan, H.R.
Lin, M.
Margaritondo, G.
Issue Date: 5-Jul-2011
Citation: Lai, S.-F., Chen, W.-C., Wang, C.-L., Chen, H.-H., Chen, S.-T., Chien, C.-C., Chen, Y.-Y., Hung, W.-T., Cai, X., Li, E., Kempson, I.M., Hwu, Y., Yang, C.S., Tok, E.-S., Tan, H.R., Lin, M., Margaritondo, G. (2011-07-05). One-pot tuning of Au nucleation and growth: From nanoclusters to nanoparticles. Langmuir 27 (13) : 8424-8429. ScholarBank@NUS Repository. https://doi.org/10.1021/la200861e
Abstract: We describe a simple and effective method to obtain colloidal surface-functionalized Au nanoparticles. The method is primarily based on irradiation of a gold solution with high-flux X-rays from a synchrotron source in the presence of 11-mercaptoundecanoic acid (MUA). Extensive tests of the products demonstrated high colloidal density as well as excellent stability, shelf life, and biocompatibility. Specific tests with X-ray diffraction, UV-visible spectrometry, visible microscopy, Fourier transform infrared spectroscopy, dark-field visible-light scattering microscopy, and transmission electron microscopy demonstrated that MUA, being an effective surfactant, not only allows tunable size control of the nanoparticles, but also facilitates functionalization. The nanoparticle sizes were 6.45 ± 1.58, 1.83 ± 1.21, 1.52 ± 0.37 and 1.18 ± 0.26 nm with no MUA and with MUA-to-Au ratios of 1:2, 1:1, and 3:1. The MUA additionally enabled functionalization with l-glycine. We thus demonstrated flexibility in controlling the nanoparticle size over a large range with narrow size distribution. © 2011 American Chemical Society.
Source Title: Langmuir
URI: http://scholarbank.nus.edu.sg/handle/10635/97432
ISSN: 07437463
DOI: 10.1021/la200861e
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