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: |
Langmuir
Stereochemistry Iodide Inorganic chemistry Metal Nanoparticles IR-74714 Mass Spectrometry METIS-268893 chemistry.chemical_compound Transition metal Impurity Electrochemistry By-product Nanotechnology General Materials Science Spectroscopy chemistry.chemical_classification Nanotubes Cetrimonium Surfaces and Interfaces Iodides Condensed Matter Physics Silver nitrate chemistry Cetrimonium Compounds Nanorod Gold Inductively coupled plasma |
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 |
Externí odkaz: |
načítá se...