Several techniques are employed to control movement at the nanoscale: 1. Magnetic Fields: Magnetic nanoparticles can be manipulated using external magnetic fields. This method is often used in targeted drug delivery. 2. Electric Fields: Electric fields can influence the movement of charged nanoparticles, a principle used in various nanoscale electronic devices. 3. Optical Tweezers: Using highly focused laser beams, optical tweezers can trap and move nanoparticles with incredible precision. 4. Chemical Gradients: Creating a gradient of chemical substances can direct the movement of nanoparticles or nanorobots.
