Journal
LANGMUIR
Volume 28, Issue 24, Pages 8874-8880Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la300199j
Keywords
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Funding
- University of Southampton (NanoUSRG)
- Royal Society
- Research Council UK (RCUK)
- EPSRC [EP/H019669/1, EP/J011797/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H019669/1, EP/J011797/1] Funding Source: researchfish
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The plasmonic properties of self-assembled layers of rod- and branched-shaped gold nanoparticles were investigated using optical techniques. Nanoparticles were synthesized by a surfactant-guided, seed-mediated growth method. The layers were obtained by gradual assembly of nanoparticles at the interface between a polar and a nonpolar solvent and were transferred to a glass slide. Polarization and angle-dependent extinction measurements showed that the layers made of gold nanorods were governed by an effective medium response. The response of the layers made by branched gold particles was characterized by random light scattering. Microscopic mapping of the spatial mode structure demonstrates a uniform optical response of the nanoparticle layers down to a submicrometer length scale.
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