  Complex (dusty) plasmas allow experimental studies of various physical
processes occurring in classical liquids and solids by directly observing
individual microparticles. A major problem is that the interaction between
microparticles is generally not molecular-like. In this Letter, we propose how
to achieve a molecular-like interaction potential in laboratory 2D complex
plasmas. We argue that this principal aim can be achieved by using relatively
small microparticles and properly adjusting discharge parameters. If
experimentally confirmed, this will make it possible to employ complex plasmas
as a model system with an interaction potential resembling that of conventional
liquids.
