Co-investigators
Nachal D. Subramanian; James J. Spivey
Faculty Mentor
Naidu V. Seetala
Location
Farrar Hall, Room 114
Session
Session 2
Start Date
20-4-2012 1:15 PM
End Date
20-4-2012 2:15 PM
Description
A wet-chemical method was used for the synthesis of Cu core – porous Mn3O4 shell nanoparticles. We used positron lifetime spectroscopy to study the variations in nano-porosity due to oxidation. Positron lifetime in pure Cu has been reported to be 0.115 ns. Thus, the observed 0.169 ns value indicates that Cu-core has some disorders such as vacancies/dislocations. The positronium lifetime variations indicate that there is no significant change in the pore structure (pore size and concentration) due to oxidation. However, a drastic change in first and second lifetime components between as-made and oxidized particles indicates the oxidation of the Cu-core.
Positron Lifetime Studies of Cu/Mn3O4 Core/Shell Nanoparticles
Farrar Hall, Room 114
A wet-chemical method was used for the synthesis of Cu core – porous Mn3O4 shell nanoparticles. We used positron lifetime spectroscopy to study the variations in nano-porosity due to oxidation. Positron lifetime in pure Cu has been reported to be 0.115 ns. Thus, the observed 0.169 ns value indicates that Cu-core has some disorders such as vacancies/dislocations. The positronium lifetime variations indicate that there is no significant change in the pore structure (pore size and concentration) due to oxidation. However, a drastic change in first and second lifetime components between as-made and oxidized particles indicates the oxidation of the Cu-core.