Figure 1.

Structure of microfluidic chip for SPR measurement composed of integrated vertical capillary enclosure made of clear acrylic resin (A), thin plastic flow channel film (B), gold/titanium sputtered substrate with immobilized antibodies and enzyme in band array configuration (C), and photograph of finished product (D). The chip is mounted on a portable SPR instrument and sample liquid is injected with pipette (E). Schematic diagram of the portable SPR instrument, (F). Optical configuration at the interface of the instrument and the sensor chip, (G).