Abstract
The electrostatic interaction of a system of two single dust particles in a plasma-sheath environment with flowing ions has been investigated quantitatively. It is shown that attractive net “binding” forces between the negatively charged particles exist, leading to the formation of a dust molecule. By laser manipulation of the dust particles, it is demonstrated that the attraction is asymmetric in such a way that it acts only on one of the particles. Moreover, the net forces between the particles can be reversibly changed between attraction and repulsion.
- Received 26 March 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.3194
©1999 American Physical Society