Figure 8:

(A) Optical image of the entire microdroplet channel filled with red ink. (B) Sequential droplet splitting mechanism for the wash-free magnetic immunoassay of PSA cancer markers: (i) mixing of reagents, (ii) formation of immunocomplexes, (iii) isolation of magnetic immunocomplexes, (iv) supernatant including unbound SERS nanotags and (v) separated magnetic immunocomplexes. Reprinted with permission from [30] Copyright 2016 American Chemical Society.

© De Gruyter