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. 2014 Jul 28;5:4568. doi: 10.1038/ncomms5568

Figure 3. Control over the thread thickness to <2 nm.

Figure 3

(a) Experimental differential extinction spectra recorded 40 min after introducing CBs into NP suspension. Chain plasmon tunes towards laser wavelength as NP size increases. Results are shown for the lowest laser powers that yield a pronounced TCP peak. (b) Chain mode peak λp for increasing lengths at each NP size, highlighting overlap with the 805 nm laser. (c,d) Simulated spectra for 50 and 60 nm NPs formed into threads, for resonant chain lengths of six and four NPs, respectively. The grey shading depicts the FWHM of the experimentally observed resonance. The simulations show that thickness of threads in a are 12±2 and 11±2 nm for the 50 and 60 nm NPs, respectively.