Dr. Louis Piper
Louis Piper joined the faculty of the Department of Physics, Applied Physics and Astronomy in Fall 2010. He received a PhD in physics from the University of Warwick (United Kingdom) in 2003. He was a post-doctoral researcher and later a research Assistant Professor at Boston University, his role included being the contact beamline scientist for X1B at the National Synchrotron Light Source. Dr Piper’s research expertise and interest center on the application of X-ray spectroscopy techniques, especially photoemission for the study of advanced materials and processes. Previous research activities have included III-nitride semiconductor interfaces, transparent conducting oxides, π-conjugated small molecules and transition metal oxides (see below for current interests). Dr Piper has published nearly 50 referred journal articles in journals including Physical Review Letters, Physical Review B, Applied Physics Letters, and Journal of Physical Chemistry C. His awards include the European Materials Research Society Young Scientist Award (Nice, 2006 and Warsaw, 2005) and the 2010 NSLS/CFN User’s meeting Poster Session Award Winner (Condensed Matter Physics).
Research Information in Brief:
Dr. Louis Piper's research interests are in the areas of experimental condensed matter physics, specifically the electronic structure and surface chemistry of functional metal oxides, using a combination of x-ray spectroscopic techniques. Functional metal oxides include: transparent conducting oxides; photo-catalysts for water splitting; polar metal oxide terminations; and, solid oxide fuel cell cathodes. Of particular interest is the electronic structure and surface chemistry at the surfaces and interfaces of these materials, due to its importance in determining the device’s performance. From energy/momentum conservation and dipole selection rules, a tremendous amount of information can be gleaned from shining monochromatic UV/X-rays onto samples and measuring the emitted photons and electrons. Electromagnetic radiation is created by the acceleration of charged particles, with Synchrotron radiation referring to the extremely bright broad band (IR to hard X-ray) radiation produced by charged particles at relativistic velocities. Dr Piper is a frequent user of dedicated Synchrotron facilities at Brookhaven National Laboratory and Lawrence Berkeley National Laboratory.
His current projects include: examining the p-type conductivity of novel oxychalcogenide layered compounds (e.g. LaCuOSe and BiCuOSe); role of Bi 6s orbitals in determining the band edge electronic structure of the photocatalyst BiVO4; and, examining the bulk electronic structure and surface chemistry of amorphous InGaZnO compounds. He is currently developing an ultra-high vacuum surface preparation chamber with UV/X-ray photoemission capabilities at the Advanced Diagnostics Laboratory at Binghamton University, in order to complement his Synchrotron spectroscopy studies.