Actions for Probing of Unembedded Metallic Quantum Dots with Positrons [electronic resource].

Email RIS file
Bookmark
Report an Issue

Probing of Unembedded Metallic Quantum Dots with Positrons [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2003.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
PDF-FILE: 7 ; SIZE: 0.5 MBYTES pages
Additional Creators
Lawrence Livermore National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
We employed the two detector coincident Doppler Broadening Technique (coPAS) to investigate Ag, Au and Ag/Au alloy quantum dots of varying sizes which were deposited in thin layers on glass slides. The Ag quantum dots range from 2 to 3 nm in diameter, while the Ag/Au alloy quantum dots exhibit Ag cores of 2 nm and 3 nm and Au shells of varying thickness. We investigate the possibility of positron confinement in the Ag core due to positron affinity differences between Ag and Au. We describe the results and their significance to resolving the issue of whether positrons annihilate within the quantum dot itself or whether surface and positron escape effects play an important role.
Report Numbers
E 1.99:ucrl-jc-154745
ucrl-jc-154745
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
08/01/2003.
"ucrl-jc-154745"
The 13th International Conference on Positron Annihilation, Kyoto (JP), 09/07/2003--09/13/2003.
Fischer, C G; Lynn, K G; Wilcoxon, J P; Weber, M H; Denison, A B; Woessner, S.
Funding Information
W-7405-ENG-48
View MARC record | catkey: 14447470