Figure 2

Property of poly(L-DOPA) coated on swab. (a) Mechanism of poly(L-DOPA) synthesis. (b) Mechanism of poly(L-DOPA) as a pH-responsive platform for capture/release DNA. (c) Photograph of swab before (left) and after (right) modified with poly(L-DOPA). (d) Scanning electron microscope images of swab before and after modification with poly(L-DOPA).