1. Nano-porosity in GaSb induced by swift heavy ion irradiation
- Author
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Ryan Weed, Wen Lei, Patrick Kluth, Rodney C. Ewing, Boshra Afra, Weixing Li, Leandro Araujo, Mark C Ridgway, Raquel Giulian, Thomas Bierschenk, Matias Rodriguez, James Sullivan, and Claudia Schnohr
- Subjects
Materials science ,Physics and Astronomy (miscellaneous) ,Bombardeamento de ions ,Microscopia eletrônica de transmissão ,Crystallographic defect ,Ion ,Condensed Matter::Materials Science ,Swift heavy ion ,Transmission electron microscopy ,Chemical physics ,Vacancy defect ,Materiais porosos ,Crystallite ,Irradiation ,Atomic physics ,Porous medium - Abstract
Nano-porous structures form in GaSb after ion irradiation with 185 MeV Au ions. The porous layer formation is governed by the dominant electronic energy loss at this energy regime. The porous layer morphology differs significantly from that previously reported for low-energy, ion-irradiated GaSb. Prior to the onset of porosity, positron annihilation lifetime spectroscopy indicates the formation of small vacancy clusters in single ion impacts, while transmission electron microscopy reveals fragmentation of the GaSb into nanocrystallites embedded in an amorphous matrix. Following this fragmentation process, macroscopic porosity forms, presumably within the amorphous phase.
- Published
- 2014