Tuneable 2D self-assembly of plasmonic nanoparticles at liquid|liquid interfaces
| Autor: | Leonora Velleman, Alexei A. Kornyshev, Steve J. Roser, Debabrata Sikdar, Anthony Kucernak, Vladimir A. Turek, Joshua B. Edel |
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| Přispěvatelé: | Commission of the European Communities, Engineering & Physical Science Research Council (EPSRC) |
| Jazyk: | angličtina |
| Předmět: |
Diffraction
Plasmonic nanoparticles 02 Physical Sciences Materials science Nanoparticle Nanotechnology 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Colloidal gold 10 Technology Phase (matter) General Materials Science Self-assembly Nanoscience & Nanotechnology 03 Chemical Sciences 0210 nano-technology Plasmon |
| Zdroj: | Velleman, L, Sikdar, D, Turek, V A, Kucernak, A R, Roser, S J, Kornyshev, A A & Edel, J B 2016, ' Tuneable 2D self-assembly of plasmonic nanoparticles at liquid|liquid interfaces ', Nanoscale, vol. 8, no. 46, pp. 19229-19241 . https://doi.org/10.1039/c6nr05081f Nanoscale |
| ISSN: | 2040-3372 2040-3364 |
| DOI: | 10.1039/c6nr05081f |
| Popis: | Understanding the structure and assembly of nanoparticles at liquid | liquid interfaces is paramount to their integration into devices for sensing, catalysis, electronics and optics. However, many difficulties arise when attempting to resolve the structure of such interfacial assemblies. In this article we use a combination of X-ray diffraction and optical reflectance to determine the structural arrangement and plasmon coupling between 12.8 nm diameter gold nanoparticles assembled at a water | 1,2-dichloroethane interface. The liquid | liquid interface provides a molecularly flat and defect-correcting platform for nanoparticles to self-assemble. The amount of nanoparticles assembling at the interface can be controlled via the concentration of electrolyte within either the aqueous or organic phase. At higher electrolyte concentration more nanoparticles can settle at the liquid | liquid interface resulting in a decrease in nanoparticle spacing as observed from X-ray diffraction experiments. The coupling of plasmons between the nanoparticles as they come closer together is observed by a red-shift in the optical reflectance spectra. The optical reflectance and the X-ray diffraction data are combined to introduce a new ‘plasmon ruler’. This allows extraction of structural information from simple optical spectroscopy techniques, with important implications in understanding the structure of nanoparticle films at liquid interfaces and their self-assembly. |
| Databáze: | OpenAIRE |
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