2018 Materials science lecture series: advanced materials - 12 November 2018
Nov 12, 2018 - 14.00 uur
Agoralaan Gebouw D
Lokaal Room C105
Mevrouw Aslihan BABAYIGIT
MRS/E-MRS joint chapter of Hasselt University: 2018 materials science lecture series: advanced materials.
Speaker: Dr. Robert Hamers, Steenbock Professor of physical sciences, University of Wisconsin-Madison, USA
Topic: Electron emission from diamond and from diamond-encapsulated naoonoparticle thin films
Chaired by: Prof. Dr. Ken Haenen, IMO-IMOMEC, Hasselt University
Monday 12 November 2018, 14:00 -15:00
Room C105, Building D, Hasselt University, Campus Diepenbeek.
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.