Figure 2
From: Simple and reusable picoinjector for liquid delivery via nanofluidics approach
Fabricated chip with a picoinjector. (a) The optical image of the device showing the multilayer structures. The insets show the schematic illustrations of the fabricated layers (a1) and the channel configuration (a2) which consists of two main microchannels and interconnected by the nanochannel array (20 channels). (b) The SEM image of the nanochannel array with a channel width of 10 μm. (c) The AFM image showing the topological profile of the nanochannel array. (d) The depth profile along the line in (c) confirming that the depth of a single nanochannel is 460 nm.