Abstract
Zinc sulphide nanorods were doped with manganese ions and the structural changes weremonitored through positron annihilation measurements. X-ray diffraction andhigh-resolution transmission electron microscopy revealed a transformation from hexagonalto cubic structure, and we observed characteristic changes in the measured positronlifetimes, their intensities and Doppler broadened lineshapes. These features wereexplained on the basis of positron trapping and subsequent annihilation at thenanorod surfaces. Further incorporation of manganese resulted in an increase of thediameter of the nanorods, and the effect was reflected in the decreasing lifetime ofpositrons. At sufficiently high concentration of manganese ions, Mn–Mn clusters wereformed. The results are compared with those obtained for ZnS nanoparticleswhere vacancies within the grains trapped a significant fraction of positrons.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
