Using the controllability described above, we successfully synthesised and finely tuned nano-Fanowman particles exhibiting Fano dips at various spectral positions. Representative TEM images in Figure show highly uniform synthetic results for nano-Fanowman particles, consisting of an 18 nm gold core, a 1.2 nm intragap, a 15 nm gold shell, and a 40 nm silver body. Each colloidal spectrum (Figure , red solid lines) exhibits a clear Fano dip, signifying high optical purity. Furthermore, the resonance position can be tuned from 640 nm to 745 nm by adjusting synthetic parameters. The black solid lines indicate the corresponding Au-NNPs used for each nano-Fanowman synthesis. The blueshifts from the dark mode position to the Fano dip position occur mainly because thiolated DNA modification introduces negative charges to the gold shell, and a thin silver atomic layer is formed on the Au-NNP surface during anisotropic silver growth. Red dotted lines represent simulation results that closely match each experimental spectrum. AuNP cores with sizes of 18, 18, and 22 nm were used for Figure -g, respectively. For simulations, we used 18, 13, and 14 nanobridges, respectively, along with Au-Ag junction widths of 39, 32, and 30 nm. Inset near-field plots at each resonance position show an approximately 200-fold enhanced E-field within each intragap. Notably, this enhancement does not arise from edges or sharp tips but from the closely adjacent surfaces of the core and the concave shell.