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X-ray irradiation is shown to trigger the deposition of Cu from solution, at room temperature, on a wide variety of insulating substrates: glass, passivated Si, TiN/Ti/SiO2/Si and photoresists like PMMA and SU-8. The process is suitable for patterning and the products can be used as seeds for electroplating of thicker overlayers.
Luis Guillermo Villanueva Torrijo, Marco Liffredo, Silvan Stettler, Nan Xu, Federico Peretti