COLL 549 |
| David Sholl1, Aravind Asthagiri1, Andrew J. Francis2, Lisa Porter2, and Paul Salvador2. (1) Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, (2) Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213 |
| One limitation to current methods for creating intrinsically chiral metal surfaces such as Pt(643) is that they are limited to crystals with small surface areas. An attractive means to create chiral metal films with larger surface areas is to deposit metals on appropriate metal oxide substrates. We will describe a joint experimental and theoretical study of Pt heteroepitaxy on SrTiO3 substrates with the aim of creating chiral Pt films. This metal/metal-oxide pair is well suited for our purpose because of the small lattice mismatch between the two materials. We have examined Pt deposition on each of the atomically flat planes of SrTiO3, (100), (111), and (110), and shown that epitaxial Pt films can be achieved. We have applied similar techniques to the deposition of Pt on SrTiO3(620) and (622), two surfaces with atomically straight steps, and SrTiO3(621), an intrinsically chiral surface. |
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Chiral Surfaces
Division of Colloid and Surface Chemistry |