Surface plasmon resonance ratios

Uchida K, Otsuka H, Kaneko M, Kataoka K, Nagasaki Y (2005) A reactive poly(ethylene glycol) layer to achieve specific surface plasmon resonance sensing with a high S/N ratio the substantial role of a short underbrushed PEG layer in minimizing nonspecific adsorption. Anal Chem 77 1075-1080... 

Similar to zero-dimensional metal nanoparticles, most of the work on one-dimensional metal nanostructures focuses almost exclusively on gold nanorods. The high interest in anisometric gold nanoclusters arises from their unique optical and electronic properties that can be easily tuned through small changes in size, structure (e.g., the position, width, and intensity of the absorption band due to the longitudinal surface plasmon resonance is strongly influenced by the shell as well as the aspect ratio of the nanorods), shape (e.g., needle, round capped cylinder, or dog bone), and the inter-particle distance [157]. 

Figure 20.2 Size and shape dependence of the surface plasmon resonance absorption spectra of gold nanoparticles. (A) Spheres in different sizes (B) Rods in different aspect ratios.

Molecule 11 forms amphiphilic Pockels-Langmuir monolayers at the air-water interface, with a collapse pressure of 34 mN m and collapse areas of 50 A at 20 °C these monolayers transfer on the upstroke only, with transfer ratios around 100% onto hydrophilic glass, quartz, or aluminum,or onto fresh hydrophilic Au, but transfer poorly on the downstroke onto graphite, with a transfer ratio of only abont 50%. The LB monolayer thickness of 11 was 23-25 A by X-ray diffraction, spectroscopic ellip-sometry, surface plasmon resonance, and XPS. With... 

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