Fig. 2: FDFs with topologically engineered structural compactness.
From: Encoding quantized fluorescence states with fractal DNA frameworks
a Schematic structures of F2,i (i = 0-3) with representative atomic force microscopic (AFM) images and line profiles across both terminal tetrahedral DNA nanostructures (TDNs) (marked with blue cross) for F2,i. The full width of half maximum height (FWHM) are measured from the line profiles. b Histogram statistics of the inter-node angles in F2,i (N = 360). c Schematic structures of F4,3 and their stochastic optical reconstruction microscopic (STORM) images (large view and individual speckles magnified from the upper image). Red speckle, Gaussian speckle (surrounded by blue dashed circle) resulted from Alexa647 labelled on the outer-shell TDNs. Yellow cross, fluorescence location of the root TDN (Cy3). Blue dot, geometric centre of the circle. d Schematic and representative AFM images of F4,1 and F2,2. e Diameter distribution of F4,1 and F2,2 from theoretical simulations (N = 1000) and AFM measurements (N = 100). Curves are Gaussian fittings of the histograms.
