Toward Smaller Aqueous-Phase Plasmonic Gold Nanoparticles: High-Stability Thiolate-Protected ∼4.5 nm Cores
| العنوان: | Toward Smaller Aqueous-Phase Plasmonic Gold Nanoparticles: High-Stability Thiolate-Protected ∼4.5 nm Cores |
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| المؤلفون: | Marcos M. Alvarez, Mesbahul Hoque, Kathryn M. Mayer, Arturo Ponce, Robert L. Whetten |
| المصدر: | Langmuir. 35:10610-10617 |
| بيانات النشر: | American Chemical Society (ACS), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Materials science, Aqueous solution, Nanoparticle, 02 engineering and technology, Surfaces and Interfaces, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Photochemistry, 01 natural sciences, 0104 chemical sciences, Colloidal gold, Electrochemistry, Surface modification, General Materials Science, Fourier transform infrared spectroscopy, Surface plasmon resonance, 0210 nano-technology, Spectroscopy, Plasmon |
| الوصف: | Most applications of aqueous plasmonic gold nanoparticles benefit from control of the core size and shape, control of the nature of the ligand shell, and a simple and widely applicable preparation method. Surface functionalization of such nanoparticles is readily achievable but is restricted to water-soluble ligands. Here we have obtained highly monodisperse and stable smaller aqueous gold nanoparticles (core diameter ∼4.5 nm), prepared from citrate-tannate precursors via ligand exchange with each of three distinct thiolates: 11-mercaptoundecanoic acid, α-R-lipoic acid, and para-mercaptobenzoic acid. These are characterized by UV-vis spectroscopy for plasmonic properties; Fourier transform infrared (FTIR) spectroscopy for ligand-exchange confirmation; X-ray diffractometry for structural analysis; and high-resolution transmission electron microscopy for structure and size determination. Chemical reduction induces a blueshift, maximally +0.02 eV, in the localized surface plasmon resonance band; this is interpreted as an electronic (-) charging of the monolayer-protected cluster (MPC) gold core, corresponding to a -0.5 V change in electrochemical potential. |
| تدمد: | 1520-5827 0743-7463 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea1e685f8b106c8c1ff0a67c2bff57d6 https://doi.org/10.1021/acs.langmuir.9b01908 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....ea1e685f8b106c8c1ff0a67c2bff57d6 |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 15205827 07437463 |
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