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Raman Spectral Mapping of III–V Nitride and Graphene Nanostructures

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Abstract

Among several spectroscopic imaging techniques to visualise the nanostructures, Raman spectral imaging is one of the most indispensible non-destructive tools. We discuss the limitations and the importance of each step involved in the Raman imaging in the visualization of different nanostructures and illustrated with examples. Raman spectroscopic imaging of nanostructures is demonstrated for differentiation of morphology in InN nanorods, crystallographic orientation for single square faceted GaN nanotube and layer thickness of graphene layers. The limitations of the spatial and spectral resolutions of the Raman maps are evaluated in the illustration.

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Acknowledgments

We thank S. Kataria, Surface Engineering Division, CSIR-National Aerospace Laboratories, Bangalore for growing graphene samples. We thank C.-P. Liu, Department of Materials Science and Engineering, National Cheng Kung University, Taiwan exclusively for supplying InN nanorod samples. We also thank P. Sahoo; A. K. Tyagi and C. S. Sundar at IGCAR for their respective contributions. One of us (AP) acknowledges Department of Atomic Energy for the financial aid.

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Authors and Affiliations

  1. Surface and Nanoscience Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India

    Avinash Patsha, Kishore K. Madapu & S. Dhara

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  1. Avinash Patsha
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  2. Kishore K. Madapu
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  3. S. Dhara
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Correspondence to S. Dhara.

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Patsha, A., Madapu, K.K. & Dhara, S. Raman Spectral Mapping of III–V Nitride and Graphene Nanostructures. MAPAN 28, 279–283 (2013). https://doi.org/10.1007/s12647-013-0082-9

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  • DOI: https://doi.org/10.1007/s12647-013-0082-9

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