Preparation of Au Single Crystals for Study of the ECALE Deposition of CdTe

摘要

A sequence of questions concerning the preparation of atomically flat Au surfacesis addressed. In addition, the formation of a 1/2 monolayer Te adlayer of a Au(100) is discussed. The 1/2 coverage of Au(100)-Te surface is desired as a first step in the electrodeposition of CdTe by the ECALE methodology. The use of oxidation/reduction cycles (ORCs) to clean the Au(100) surface is shown to be counter productive, if atomically flat planes are also desired. Roughening results from the ORCs as the surface reconstructs at low potentials, then unreconstructs at high potentials. The reconstructed surface contains excess surface atoms, such that upon lifting of the reconstruction, monoatomically high