Figure 4From: DNA-functionalized silicon nitride nanopores for sequence-specific recognition of DNA biosensorFESEM images. The images were obtained on, respectively, a non-functionalized nanopore (silanization time t = 0 h) and five nanopores treated with silanes for 1, 3, 6, 12 and 24 h. The presence of the organic layer is associated with the appearance of a ragged edge around the circular pore and shows time dependence.Back to article page