The RaDeS (Radical Deposition Source) has been designed and developed to directly deposit radical species on the wanted target substrate. Pristine molecules are sublimated from a conventional Knudsen cell and collected into an heated collector chamber, located directly in front of the cell. From here they pass into a drift-tube, where they react by multiple hits with the tube, which in the current version is a gold coated steel tube, to catalize the carbon-halogen cleavage, the initial step of the Ullmann coupling reaction. The target substrate is located at the end of the drift-tube, and all temperatures (Knudsen cell, chamber, drift-tube and final substrate) are indipendently controlled.

The RaDeS prototype is a work in progress,
keep up with our work to see how it evolves!