English: Appearance of real linear polymer chains as recorded under liquid medium using an atomic force microscope. Chain thickness is 0.4 nm. At giving attribution, the following reference should be cited: Y. Roiter and S. Minko, AFM Single Molecule Experiments at the Solid-Liquid Interface: In Situ Conformation of Adsorbed Flexible Polyelectrolyte Chains, Journal of the American Chemical Society, vol. 127, iss. 45, pp. 15688-15689 (2005).