Novel atomic dynamics at W (111) surfaces

Tsu Y. Fu, Weng J. Wong, Tien T. Tsong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ultra high vacuum- field ion microscopy was used to study the atomic dynamics at W (111) surfaces. Over hundreds of the observations for atomic processes such as the terrace diffusion, ascending, descending, detachment motion on W (111) surfaces, we find that the activation energy of W clusters diffusion on W (111) as a function of cluster size has an oscillatory and increasing behavior. But, the activation energy of a single W atom is high anomalously. The compact geometric structures are more stable and have higher activation energies of surface diffusion than structures with extra atoms at the periphery. Unlike the general systems, the occurrence temperatures of different processes at W (111) are quite near. These experimental results were used to discuss the formation mechanism of single atom W tips.

Original languageEnglish
Title of host publicationINEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings
Pages885-886
Number of pages2
DOIs
Publication statusPublished - 2010
Event2010 3rd International Nanoelectronics Conference, INEC 2010 - Hongkong, China
Duration: 2010 Jan 32010 Jan 8

Other

Other2010 3rd International Nanoelectronics Conference, INEC 2010
CountryChina
CityHongkong
Period10/1/310/1/8

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Fu, T. Y., Wong, W. J., & Tsong, T. T. (2010). Novel atomic dynamics at W (111) surfaces. In INEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings (pp. 885-886). [5425152] https://doi.org/10.1109/INEC.2010.5425152