Vacancy Clusters on Surfaces of Au Nanoparticles Embedded in MgO

Journal Article · Mon Nov 29 00:00:00 EST 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.83.4586· OSTI ID:20217982

Xu, Jun ^[1]; Mills, Jr, A P ^[2]; Ueda, A ^[3]; Henderson, D O ^[3]; Suzuki, R ^[4]; Ishibashi, S ^[4]

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1. Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6142 (United States)
2. Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, New Jersey 07974 (United States)
3. Chemical Physics Laboratory, Physics Department, Fisk University, 1000 17th Avenue North, Nashville, Tennessee 37208 (United States)
4. Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba, Ibaraki 305, (Japan)

MeV implantation of gold ions into MgO(100) followed by annealing is a method to form gold nanoparticles for obtaining modified optical properties. We show from variable-energy positron spectroscopy that clusters of 2 Mg and 2 O vacancies (v{sub 4}) are attached to the gold nanoparticle surfaces within the projected range (R{sub p}) . We also find that v{sub 4} vacancy clusters are created at depths less than R{sub p} , and extend into the region greater than R{sub p} due to damage induced by knock-on collisions. (c) 1999 The American Physical Society.

• OSTI ID: 20217982
• Journal Information: Physical Review Letters, Vol. 83, Issue 22; Other Information: PBD: 29 Nov 1999; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
GOLD
MAGNESIUM OXIDES
ION IMPLANTATION
VACANCIES
MEV RANGE 01-10
DOPPLER BROADENING
POSITRON BEAMS
ELECTRONIC STRUCTURE
ANNEALING
EXPERIMENTAL DATA