| AVS 55th International Symposium & Exhibition | |
| Surface Science | Thursday Sessions |
| Session SS2-ThA |
| Session: | Novel Reactive Surfaces |
| Presenter: | A.D. Jewell, Tufts University |
| Authors: | A.D. Jewell, Tufts University J.W. Han, Georgia Tech D.O. Bellisario, Tufts University A.E. Baber, Tufts University H.L. Tierney, Tufts University D.S. Sholl, Georgia Tech E.C.H. Sykes, Tufts University |
| Correspondent: | Click to Email |
While chiral Cu surfaces have been shown to be enantioselective for certain dehalogenation reactions,1,2 we seek to develop a surface with a much more general enantiospecific reactivity. To this end, Cu surfaces have been alloyed with a range of more reactive atoms. Simulations of the segregation of different metals to the step edges of Cu(322) has shown that Pd and Ag are promising candidates for segregation to the chiral kink sites of a Cu surface. Depositing reactive atoms selectively at the kink sites will allow us to increase the reactivity while preserving the chiral nature of the kink and thus tune the surface’s enantiospecificity. Low-temperature scanning tunneling microscopy has been used to follow the preferred adsorption site of Pd and Ag atoms deposited at step edges on a Cu{111} surface at a variety of temperatures. The Cu{111} is an ideal test bed for this study as it contains large terraces, step edges and equal numbers of R and S kink sites. Alloyed kink sites composed of both Cu and Ag or Pd atoms will have both structural and chemical asymmetry and thus one can expect their enantioselectivity to be enhanced.
1 Rampulla, D. M.; Gellman, A. J., Surf. Sci. 2006, 600, 2823-2829.
2 Rampulla, D. M.; Francis, A. J.; Knight, K. S.; Gellman, A. J., J. Phys. Chem. B 2006, 110, 10411-10420.