Surface-Enhanced Raman Spectroscopy of Dye and Thiol Molecules Adsorbed on Triangular Silver Nanostructures: A Study of Near-Field Enhancement, Localization of Hot-Spots, and Passivation of Adsorbed Carbonaceous Species

<table>SERS of fluorescein molecules on silver patterns of 3 <i>μ</i>m diameter and 50 nm thickness. <svg height="11.125" id="M36" style="vertical-align:-0.20064pt" version="1.1" viewbox="0 0 54.012501 11.125" width="54.012501" xmlns="http://www.w3.org/2000/svg">
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<g transform="translate(72,-63.1)">
<text transform="matrix(1,0,0,-1,-71.95,63.35)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝜆</tspan>
<tspan style="font-size: 12.50px; " x="10.227454" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="22.267843" y="0">5</tspan>
<tspan style="font-size: 12.50px; " x="28.519342" y="0">3</tspan>
<tspan style="font-size: 12.50px; " x="34.770844" y="0">2</tspan>
</text>
</g>
</g>
</svg>nm. <svg height="14.7125" id="M37" style="vertical-align:-3.22281pt" version="1.1" viewbox="0 0 59.737499 14.7125" width="59.737499" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.7125)">
<g transform="translate(72,-60.23)">
<text transform="matrix(1,0,0,-1,-71.95,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑃</tspan>
</text>
<text transform="matrix(1,0,0,-1,-64.52,60.37)">
<tspan style="font-size: 8.75px; " x="0" y="0">e</tspan>
<tspan style="font-size: 8.75px; " x="3.702096" y="0">x</tspan>
<tspan style="font-size: 8.75px; " x="7.8680482" y="0">c</tspan>
</text>
<text transform="matrix(1,0,0,-1,-48.8,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="12.027886" y="0">1</tspan>
<tspan style="font-size: 12.50px; " x="18.279387" y="0">2</tspan>
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</svg> <i>μ</i>W. Three spectra below were extracted from the pixels marked.</table>

Journal of Nanotechnology

fig6

Figure 6

Figure 6: Surface-Enhanced Raman Spectroscopy of Dye and Thiol Molecules Adsorbed on Triangular Silver Nanostructures: A Study of Near-Field Enhancement, Localization of Hot-Spots, and Passivation of Adsorbed Carbonaceous Species 

Figure 6 | Surface-Enhanced Raman Spectroscopy of Dye and Thiol Molecules Adsorbed on Triangular Silver Nanostructures: A Study of Near-Field Enhancement, Localization of Hot-Spots, and Passivation of Adsorbed Carbonaceous Species 