Relation between the charge/discharge processes of dust particles and   the dynamics of dust clouds over the Moon surface
  It is shown that the appearance of lunar horizon glow and streamers observed above the lunar terminator described by the dynamic fountain mode byl Stubbs et al. (2006) requires a value of dust particles charge several orders exceed what they obtain on the Lunar surface. To obtain a sufficient charge due to a departure of photoelectrons separated submicron particles have to flow over the surface during tens of seconds or even several minutes. Therefore for emergence of dust streamers at the lunar sunrise it is necessary that dust particles do not lose the positive charge during a night. 
E. V. Rosenfeld, A. V. Zakharov
astro-ph.EP physics.space-ph