12 November 2018: MRS/E-MRS Materials science lecture by Prof. dr. Robert Hamers Nov 12, 2018
Mevrouw Aslihan BABAYIGIT
Diamond’s negative electron affinity allows us to be an unusually good emitter of electrons when excited with above-bandgap light. While these electron emissive properties have long been used in vacuum applications, we have recently established that diamond can also be used as a solid-state emitter of electrons into water and other liquids, forming solvated electrons and other high-energy chemical species. The efficiency of electron emission is limited by diamond’s weak absorbance. In an effort to enhance electron emission, we have incorporated silver nanoparticles into the diamond films by using thermally induced de-wetting from continuous films, followed by encapsulation by a second diamond layer. Here, I will discuss diamond’s photo-excited electron emission into water and the properties of diamond-encapsulated nanoparticle films.