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(a) SEM photograph of the HSQ and SU-8 mold featuring 300 nm tall HSQ lines. (b) Optical micrograph of two SU-8 micro-channel systems connected via a network of nano-channels of the 60 nm tall HSQ lines, with a length 30 μm. (c) Montage of fluorescence images of λ-DNA in 5x TBE buffer (pH 8.5). The channel cross-sections are 300 × 300, 200 × 300, 150 × 300, 100 × 105, 100 × 60 nm2 channels from left to right.
