Direct observation of elemental segregation in InGaN nanowires by X-ray nanoprobe

6533b825fe1ef96bd12826f9

RESEARCH PRODUCT

Direct observation of elemental segregation in InGaN nanowires by X-ray nanoprobe

J. Malindretos Gema Martínez-criado M. Gómez-gómez Christian Denker A. Rizzi Juan Angel Sans J. Segura-ruiz Andrés Cantarero Rémi Tucoulou Núria Garro I. Snigireva Peter Cloetens

subject

010302 applied physics X-ray nanoprobe Photoluminescence Chemistry Analytical chemistry Nanowire Nanoprobe 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Epitaxy 01 natural sciences symbols.namesake 0103 physical sciences symbols General Materials Science 0210 nano-technology Raman spectroscopy Raman scattering Molecular beam epitaxy

description

Using synchrotron radiation nanoprobe, this work reports on the elemental distribution in single Inx Ga1–xN nanowires (NWs) grown by molecular beam epitaxy directly on Si(111) substrates. Single NWs dispersed on Al covered sapphire were characterized by nano-X-ray fluorescence, Raman scattering and photoluminescence spectroscopy. Both Ga and In maps reveal an inhomogeneous axial distribution inside sin- gle NWs. The analysis of NWs from the same sample but with different dimensions suggests a decrease of In segregation with the reduction of NW diameter, while Ga distribution seems to remain unaltered. Photoluminescence and Raman scattering measurements carried out on ensembles of NWs exhibit relevant signatures of the compositional disorder. (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

year	journal	country	edition	language
2011-01-17	physica status solidi (RRL) - Rapid Research Letters

https://doi.org/10.1002/pssr.201004527

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