A Digital Instrument Multimode SPM in the tapping mode with BRUKER RTESPA-300 tip was used for observing the surface topographies and the corresponding thickness of different exfoliated nanosheets,17 (link) deposited on a clean silicon substrate (1 × 1 cm2) by drop casting method. The images were taken at a resolution of 256 × 256 pixel, by scanning an area of 10 × 10 μm2 at a rate of 1.00 Hz. Besides that, the values of operation point, integral gain, and P gain were fixed at 0.153 V, 1500 and 0.001, respectively.