Figure 3: Structure and optical properties of SBS assemblies of Au NRs.
From: Attomolar DNA detection with chiral nanorod assemblies
(a–f) Representative TEM images for SBS assemblies obtained after different number of PCR cycles, n=0 (a), 2 (b,c), 5 (d), 10 (e) and 15 (f); scale bar, 50 nm. (g,h) Cryo TEM tomography images for NRs SBS assembled trimer (g) and pentamer (h); scale bar, 25 nm. (i, j) Experimental ultraviolet–visible (i) and CD spectra (j) for SBS assemblies with n=0–30. (k) Evolution of spectral features of SBS NR assemblies represented by λL (longitudinal peak maximum in ultraviolet–visible spectra), λp (positive peak in plasmonic part of the CD spectra) and λn (negative peak in plasmonic part of the CD spectra) with increasing n. (l) Dependence of the maximum of chiral anisotropy factor gmax on n. (m,n) Calculated absorption (m) and CD spectra (n) for NRs SBS assemblies. The number of NRs, n, ranged from 1 to 5. The error bars in i and l represent the standard deviation of sample measurements.
