Figure 36

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(a) Sketch of the experimental setup. MR: mirror, AL: aspherical lens, PD: photodiode, Pol.Con.: polarisation controller. (b) Power-normalized optical shifts for an aqueous solution containing GNRs (1.5 mM Au) and milk powder (1% w/w) (dots). The crosses refer to a solution with only the milk powder. (c) Same shift profiles normalized to their 740 nm values, together with a reference profile from a spectrophotometer (cyan curve).
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