Nanopore-based scanning system including a probe structure comprising a nanopore; suction means configured to draw an end of a (bio)molecule inside the nanopore and inside the probe structure, single or multiple times; and displacement means configured to mechanically displace the probe structure and the nanopore relative to the one (bio)molecule along a direction following a direction of extension of the (bio)molecule while the (bio)molecule is located inside the nanopore and inside the probe structure, or configured to mechanically displace at least one support holding the (bio)molecule relative to the nanopore along a direction following a direction of extension of the (bio)molecule while holding the at least one support and while the (bio)molecule is located inside the nanopore.