| AVS 55th International Symposium & Exhibition | |
| Surface Science | Wednesday Sessions |
| Session SS2+NC-WeM |
| Session: | Functional Metal Oxides and Quantum Metal Structures |
| Presenter: | L. Bartels, University of California at Riverside |
| Authors: | Z. Cheng, University of California at Riverside G. Pawin, University of California at Riverside D. Sun, University of California at Riverside M. Luo, University of California at Riverside D. Kim, University of California at Riverside Y. Zhu, University of California at Riverside L. Bartels, University of California at Riverside |
| Correspondent: | Click to Email |
The diffusion of isolated adsorbates at extended low-index metal surfaces has been studied by scanning tunneling microscopy at many places, yet the behavior of isolated molecules may significantly differ from that of molecules at higher coverages and in confined structures such as nanometer-size metal clusters. We investigate the behavior of coverages of CO molecules confined to 4nm pores formed on Cu(111). While high-coverages form ordered patterns, in which vacancy diffusion and the behavior of dislocation lines can be studied, intermediate coverages aggregate to disordered islands or disperse completely across a pore, thus resembling a 2D liquid and gas, respectively. Isolated molecules show different diffusive behavior at the perimeters of the pore and at their center, revealing the importance of substrate confinement for the molecular behavior.