Fig. 2.

Characterization of the Au nanodots. (A) The design consists of a 20 × 20 nanofabricated square array of Au nanodots on a Si substrate, each separated by a distance of ≈1 μm. (Scale bar, 3 μm.) (B) Au nanodots viewed by scanning electron microscopy. (Scale bar, 1 μm.) (C) Three-dimensional AFM image of an individual Au nanodot measuring h = 27 nm and d = 93 nm. A schematic illustrates the general physical dimensions of the NPC. Blue and black boxes represent the cytoplasmic ring and nuclear ring moiety of the NPC, respectively.