Figure 3

TEM micrographs (a) carbon dots (CDs); the small insets are the size distribution and the HRTEM micrograph of CDs (b) GONS; (c) CDs-aptamer-GONSs; (d) CDs mixed with GONSs.

TEM micrographs (a) carbon dots (CDs); the small insets are the size distribution and the HRTEM micrograph of CDs (b) GONS; (c) CDs-aptamer-GONSs; (d) CDs mixed with GONSs.