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Proceedings Paper

Electron microscopy and cathodoluminescence in electrospun nanodimensional structures: challenges and opportunities
Author(s): E. M. Campo; A. Meléndez; K. Morales; J. Poplawsky; J. J. Santiago-Avilés; I. Ramos
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Paper Abstract

GaN nanofibers were sintered by electrospinning and analyzed by electron microscopy techniques to study morphology and grain size. After heat treatment, the fibers showed thinner mats with polycrystalline grains with size on the order of 10 nm. For the first time in electospun GaN, optical properties were investigated by room temperature cathodoluminescence. Despite polycrystallinity, the fibers produced a luminescence signal. The NBE might be blueshitfted (by 1.1 eV) by the electron-confinement effect of excitons in the nm-sized grains. The origin of the other two emissions is also compared to GaN fibres sintered by alternative techniques. The existence of a NBE signal from GaN nanofibres could open the door to applications in nanophotonics.

Paper Details

Date Published: 10 June 2010
PDF: 6 pages
Proc. SPIE 7729, Scanning Microscopy 2010, 77290T (10 June 2010); doi: 10.1117/12.866761
Show Author Affiliations
E. M. Campo, Ctr. Nacional de Microelectrónica (Spain)
Lehigh Univ. (United States)
A. Meléndez, Univ. de Puerto Rico en Humacao (United States)
K. Morales, Univ. de Puerto Rico en Humacao (United States)
J. Poplawsky, Lehigh Univ. (United States)
J. J. Santiago-Avilés, Univ. of Pennsylvania (United States)
I. Ramos, Univ. de Puerto Rico en Humacao (United States)

Published in SPIE Proceedings Vol. 7729:
Scanning Microscopy 2010
Michael T. Postek; Dale E. Newbury; S. Frank Platek; David C. Joy, Editor(s)

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