http://www3.interscience.wiley.com/journal/122211041/abstract Is There a ZnO Face Stable to Atomic Hydrogen? Advanced Materials Volume 21, Issue 17, Date: May 4, 2009, Pages: 1700-1706 Giovanni Bruno, Maria Michela Giangregorio, Graziella Malandrino, Pio Capezzuto, Ignazio L. Fragalà, Maria Losurdo