1" sensitivity resonance characteristics

Depth can be an indicator of interactions between LSPs and bulk SPs. In thick nanowires, an LSP is well isolated from bulk SPs, while LSPs interact with and are affected from bulk SPs significantly in shallow nanowires. It was shown that penetration depth was calculated to be smaller for thicker nanowires, as a result of increased field localization [17]. In fact, a nanowire period A) and a fill factor (/) should also be considered in this picture, in the sense that LSPs tend to be coupled to each other at appropriate values of A and/. On the one hand, if LSPs perturb SPs weakly, i.e., LSPs are dominated by SPs, local field enhancement and sensitivity improvement over conventional SPR structure are rather weak. On the other hand, if LSPs dominate SPs, resonance characteristics become so broad that resonance effectively disappears. In short, an optimum nanowire depth exists, although the optimum may depend on other parameters. 

In general, the dissection of substituertt effects need not be limited to resonance and polar components, vdiich are of special prominence in reactions of aromatic compounds.. ny type of substituent interaction with a reaction center could be characterized by a substituent constant characteristic of the particular type of interaction and a reaction parameter indicating the sensitivity of the reaction series to that particular type of interactioa For example, it has been suggested that electronegativity and polarizability can be treated as substituent effects separate from polar and resonance effects. This gives rise to the equation... 

Ionic polysulfides dissolve in DMF, DMSO, and HMPA to give air-sensitive colored solutions. Chivers and Drummond [88] were the first to identify the blue 83 radical anion as the species responsible for the characteristic absorption at 620 nm of solutions of alkali polysulfides in HMPA and similar systems while numerous previous authors had proposed other anions or even neutral sulfur molecules (for a survey of these publications, see [88]). The blue radical anion is evidently formed by reactions according to Eqs. (5)-(8) since the composition of the dissolved sodium polysulfide could be varied between Na2S3 and NaaS with little impact on the visible absorption spectrum. On cooling the color of these solutions changes via green to yellow due to dimerization of the radicals which have been detected by magnetic measurements, ESR, UV-Vis, infrared and resonance Raman spectra [84, 86, 88, 89] see later. 

Resonance Raman studies of the recombinant proteins showed vibrational bands at the 200-430 cm region characteristic of iron-sulfur clusters (124). Most interestingly, on Fe and O isotope sensitive band was detected at 801 cm which could be attributed to either a Fe(IV)=0 species or a monobridged Fe-O-Fe structure. This observation, together with Mossbauer analysis, which indicated a mixed N, 0, and S ligand environment for cluster 2, suggests a Fe-O-Fe or Fe=0 unit as part of the structure for cluster 2. 

The mechanism that induces such a change in the resonance wavelength behavior is the transition of the lowest order cladding mode into an overlay guided mode and the consequent mode redistribution. Here, the attention is focused on the analysis of the transition curves to determine the novel sensitivity characteristics of HRI-coated LPGs and to outline the dominant role of the overlay thickness and the mode order. 

Once modeled the transition curves, it is possible to retrieve an analytical form for the sensitivity characteristics in nano-sized coated LPGs. By using the SRI-derivative of the resonance wavelengths, the SRI sensitivity can be expressed as ... 

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