### Abstract

Fundamental to an atomistic understanding of many surface phenomena is how atoms and small atomic clusters behave on the surface and what energies are involved in various atomic processes. Using the field ion microscope, we have measured diffusion parameters of small Pd clusters with two to nine Pd atoms on the W(110) surface. The average activation energy of the center of mass diffusion increases with the number of Pd atoms in the clusters. From the probability of observing different atomic configurations during diffusion, possible cluster diffusion mechanisms are probed. A small Pd cluster can form either a one-dimensional (1D) linear-chain or a two-dimensional island-like structure. The stability of linear chains remains until the number of atoms reaches eight. From the probability of observing different structures approaching thermal equilibrium, we discuss the importance of many body effects in the adatom-adatom interaction.

Original language | English |
---|---|

Pages (from-to) | 143-148 |

Number of pages | 6 |

Journal | Applied Surface Science |

Volume | 219 |

Issue number | 1-2 |

DOIs | |

Publication status | Published - 2003 Oct 15 |

### Fingerprint

### Keywords

- Adatom-adatom interaction
- Cluster
- Diffusion
- Field ion microscopy
- Palladium
- Tungsten

### ASJC Scopus subject areas

- Surfaces, Coatings and Films

### Cite this

*Applied Surface Science*,

*219*(1-2), 143-148. https://doi.org/10.1016/S0169-4332(03)00596-8

**Structure and diffusion of Pd clusters on the W(1 1 0) surface.** / Fu, Tsu-Yi; Hwang, Yi Ju; Tsong, T. T.

Research output: Contribution to journal › Article

*Applied Surface Science*, vol. 219, no. 1-2, pp. 143-148. https://doi.org/10.1016/S0169-4332(03)00596-8

}

TY - JOUR

T1 - Structure and diffusion of Pd clusters on the W(1 1 0) surface

AU - Fu, Tsu-Yi

AU - Hwang, Yi Ju

AU - Tsong, T. T.

PY - 2003/10/15

Y1 - 2003/10/15

N2 - Fundamental to an atomistic understanding of many surface phenomena is how atoms and small atomic clusters behave on the surface and what energies are involved in various atomic processes. Using the field ion microscope, we have measured diffusion parameters of small Pd clusters with two to nine Pd atoms on the W(110) surface. The average activation energy of the center of mass diffusion increases with the number of Pd atoms in the clusters. From the probability of observing different atomic configurations during diffusion, possible cluster diffusion mechanisms are probed. A small Pd cluster can form either a one-dimensional (1D) linear-chain or a two-dimensional island-like structure. The stability of linear chains remains until the number of atoms reaches eight. From the probability of observing different structures approaching thermal equilibrium, we discuss the importance of many body effects in the adatom-adatom interaction.

AB - Fundamental to an atomistic understanding of many surface phenomena is how atoms and small atomic clusters behave on the surface and what energies are involved in various atomic processes. Using the field ion microscope, we have measured diffusion parameters of small Pd clusters with two to nine Pd atoms on the W(110) surface. The average activation energy of the center of mass diffusion increases with the number of Pd atoms in the clusters. From the probability of observing different atomic configurations during diffusion, possible cluster diffusion mechanisms are probed. A small Pd cluster can form either a one-dimensional (1D) linear-chain or a two-dimensional island-like structure. The stability of linear chains remains until the number of atoms reaches eight. From the probability of observing different structures approaching thermal equilibrium, we discuss the importance of many body effects in the adatom-adatom interaction.

KW - Adatom-adatom interaction

KW - Cluster

KW - Diffusion

KW - Field ion microscopy

KW - Palladium

KW - Tungsten

UR - http://www.scopus.com/inward/record.url?scp=0042383005&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0042383005&partnerID=8YFLogxK

U2 - 10.1016/S0169-4332(03)00596-8

DO - 10.1016/S0169-4332(03)00596-8

M3 - Article

AN - SCOPUS:0042383005

VL - 219

SP - 143

EP - 148

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

IS - 1-2

ER -