Vacancy Clusters at Nanoparticle Surfaces.

Xu, J. ; Moxom, J. ; Somieski, B. ; White, C. W. ; Mills, A. P. ; Suzuki, R. ; Ishibashi, S. ; Ueda, A. ; Henderson, D.

Technical Information Center Oak Ridge Tennessee

关键词: Annihilation;    Positrons;    Particles;    Surfaces;    Vacancy clusters;   

RP-ID  :  DE2001772460

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The authors detect vacancy clusters at Au nanoparticle surfaces using a combination of positron lifetime spectroscopy, 1- detector, and 2-detector measurements of Doppler broadening of annihilation radiation. Gold nanoparticles are formed by MeV implantation of gold ions into MgO (100) followed by annealing. Clusters of two Mg and two O vacancies (v(sub 4)) are attached to the gold nanoparticle surfaces within the projected range (R(sub p)).