  Possible existence of chaotic oscillations in ion dynamics in the sheath and
pre-sheath regions of a dusty plasma, induced by externally driven dust-charge
fluctuation, is presented in this work. In a complex plasma, dust charge
fluctuation occurs continuously with time due to the variation of electron and
ions current flowing into the dust particles. In most of the works related to
dust-charge fluctuation, theoretically it is assumed that the average
dust-charge fluctuation follows the the plasma perturbation, while in reality,
the dust-charge fluctuation is a semi-random phenomena, fluctuating about some
average value. The very cause of dust-charge fluctuation in a dusty plasma also
points to the fact that these fluctuations can be driven externally by changing
electron and ion currents to the dust particles. With the help of a
\emph{hybrid}-Particle in Cell-Monte Carlo (\emph{h}-PIC-MCC) code in this
work, we use the plasma sheath as a candidate for driving the dust-charge
fluctuation by periodically exposing the sheath-side wall to UV radiation,
causing photoemission of electrons, which in turn drive the dust-charge
fluctuation. We show that this \emph{driven} dust-charge fluctuation can induce
a chaotic response in the ion dynamics in the sheath and the pre-sheath
regions.
