Demonstration of successful ALD platinum deposition
Channel: Gianmario Scotti
Date: 2014-01-15

We deposited 1 nm (one nanometer - about 10 atomic layers) of platinum on a silicon wafer. The process used is called "atomic layer deposition" - ALD. In this video I am proving that the surface is indeed covered by platinum, even though the layer is too thin to be visible by the naked eye. I pipette some diluted hydrogen peroxide on the surface of the wafer. The effervescence of the liquid is the result of hydrogen peroxide's decomposition into water and oxygen - a reaction that is catalysed by platinum. Without the presence of a catalyst, the reaction would be so slow as to be imperceptible.

The cameraman is my friend and colleague Giovanni Marin.