Iodide Impurities in Hexadecyltrimethyl ammonium Bromide (CTAB) Products: Lot-Lot Variations and Influence on Gold Nanorod Synthesis

Autor: C. Ungureanu, R.G. Rayavarapu, Srirang Manohar, Petra Krystec, Ton G. van Leeuwen
Přispěvatelé: Signal Processing Systems, ACS - Amsterdam Cardiovascular Sciences, CCA -Cancer Center Amsterdam, Biomedical Engineering and Physics, LaserLaB - Light and Tissue, Biomedical Photonic Imaging, Faculty of Science and Technology
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Zdroj: Langmuir, 26(7), 5050-5055. American Chemical Society
Langmuir, 26(7). American Chemical Society
Rayavarapu, R G, Ungureanu, C, Krystek, P, van Leeuwen, T G & Manohar, S 2010, ' Iodide Impurities in Hexadecyltrimethyl ammonium Bromide (CTAB) Products: Lot-Lot Variations and Influence on Gold Nanorod Synthesis ', Langmuir, vol. 26, no. 7, pp. 5050-5055 . https://doi.org/10.1021/la100166f
ISSN: 0743-7463
DOI: 10.1021/la100166f
Popis: Recent reports [Smith and Korgel Langmuir 2008, 24, 644-649 and Smith et al. Langmuir 2009, 25, 9518-9524] have implicated certain hexadecyltrimethylammonium bromide (CTAB) products with iodide impurities, in the failure of a seed-mediated, silver and surfactant-assisted growth protocol, to produce gold nanorods. We used two of the three "suspect" CTAB products and a "good" CTAB product in the protocol, varying silver nitrate solutions in the growth solutions. We obtained excellent gold nanorod samples as witnessed in signature longitudinal plasmon peaks in optical extinction spectra, which we substantiated using electron microscopy. Analysis of these samples using inductively coupled plasma mass spectroscopy (ICP-MS) failed to detect iodide. We subsequently learnt from discussions with Smith et al. that different lot numbers within the same product had been analyzed by our respective laboratories. We can conclude that iodide impurities can vary significantly from lot to lot within a product, to such an extent that there is no guarantee that gold nanorods can be synthesized with one or other CTAB product. Conversely, labeling a CTAB product, identified by a product number or supplier name, as one whose use precludes the formation of nanorods, is also hasty.
Databáze: OpenAIRE
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