The facile removal of CTAB from the surface of gold nanorods
| Autor: | ReJeana Cary, Rajesh K. Mehra, Sarah Unser, Jie He, Kenneth P. Aron, Laura B. Sagle, Ian Bruzas, Zhiwei Shi |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Surface Properties Metal Nanoparticles 02 engineering and technology Borohydrides 010402 general chemistry Borohydride 01 natural sciences chemistry.chemical_compound Sodium borohydride Colloid and Surface Chemistry X-ray photoelectron spectroscopy Bromide Spectroscopy Fourier Transform Infrared Sulfhydryl Compounds Physical and Theoretical Chemistry Fourier transform infrared spectroscopy Nanotubes Cetrimonium Fatty Acids Surfaces and Interfaces General Medicine Surface-enhanced Raman spectroscopy Surface Plasmon Resonance 021001 nanoscience & nanotechnology 0104 chemical sciences Kinetics chemistry Reagent Cetrimonium Compounds Thermodynamics Nanorod Gold 0210 nano-technology Biotechnology Nuclear chemistry |
| Zdroj: | Colloids and surfaces. B, Biointerfaces. 163 |
| ISSN: | 1873-4367 |
| Popis: | A common capping agent for gold nanorods, Cetyl trimethylammonium bromide (CTAB), is particularly problematic for biological studies because of its cytotoxicity. Several procedures have been developed to remove the CTAB from the surface of the gold nanorods, but most are lengthy, involving many steps, and use expensive reagents. Here, we present a simple, one-pot method for the complete removal of CTAB from the surface of gold nanorods, so that particles can be more effectively utilized in biological in vivo studies. The procedure involves first adding sodium borohydride to remove the CTAB, quickly followed by a replacement ligand, such as mercaptoundecanoic acid (MUA). Both the CTAB removal and MUA replacement were monitored by FTIR, surface enhanced Raman spectroscopy (SERS) and X-Ray Photoelectron Spectroscopy (XPS) and compared to commercially available citrate-capped gold nanorods. The procedure presented herein is shown to be as effective at removing CTAB and replacing it with MUA as commercially available gold nanorod samples. |
| Databáze: | OpenAIRE |
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