An apparatus for growing nano-clusters includes a pair of electrodes separated by an electrode pair spacing and a field generation module that generates a corona discharge across the electrodes. The corona discharge generates an electromagnetic field near the electrodes. A voltage potential across the electrodes is a medium voltage. The field generation module includes a medium voltage module that generates a medium voltage waveform, which is transmitted to the electrodes to generate the corona discharge. The field generation module includes a broad frequency generation module that generates a broad spectrum of frequencies within the medium voltage waveform. A raw material feeder module feeds particles of a raw material through the electromagnetic field. The electromagnetic field with the broad spectrum of frequencies is operative to separate at least a portion of the raw material fed through the electromagnetic field into free atoms.