Fig. 7

Surface AFM measurement results for the fabricated sensors based on the size of PbS QDs: (a) 2.9, (b) 4.8, and (c) 5.2 nm.

Surface AFM measurement results for the fabricated sensors based on the size of PbS QDs: (a) 2.9, (b) 4.8, and (c) 5.2 nm.