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DNA sample imaged with DLC supersharp cantilever.
1x1µm scan, 512 dpl, 1Hz scan rate.
Both single- and double- stranded DNAs are present on the sample. The twist structure of the double-stranded DNAs can be observed even in this relatively large scan.
 

DNA-Protein complex sample imaged with Si fpN01S cantilever.
1x1µm scan, 512 dpl, 1Hz scan rate. Roughness analysis along the line reveals that the surface of this sample is relatively rough, R3z being equal to 0.48 nm

DNA related presentations at SPIE Defense and Security Sensing