Magnetically Driven Single DNA Nanomotor

Magnetically driven DNA nanomotors: one end of a set of DNA hairpins is immobilized on a glass surface and the other is conjugated to magnetic particles. The DNA hairpin molecules are opened by an external magnetic field gradient, and subsequently closed through DNA hybridization after the removal of the magnetic field. The separation of the ends of the DNA hairpin during opening is interpreted as the power stroke of the nanomotor and the hybridization of the hairpin as the recovery stroke.