Raman spectroscopy to identify nanostructural properties

TEHRAN, Nov. 07 (MNA) – Researchers in Shiraz University and Institute for Research in Fundamental Sciences have studied links between Raman spectroscopy frequencies and different properties of nanostructures.

Headquarters for Development of Nanotechnology informed Mehr News of the paper in a report; “recent developments of nanotechnology have helped synthesis of nanostructures with different properties and geometric shape, which include fullerenes, multi- and single-walled carbon nanotubes, graphene sheets, nanoparticles, nanowires, etc.,” said the report.

One of the most important concern for research literature after developing nanostructures, is identification and estimation of their properties. Esmail Ghavanlou, senior researcher of the paper ‘Analysis of radial breathing-mode of nanostructures with various morphologies: a critical review,’ told the Headquarters that the sheer size of the structures made measurement of its properties through direct methods very difficult or extremely expensive; “therefore, finding simple and cheap methods to estimate the properties gains importance; our paper reviewed an empirical method in identification of different nanostructures, with results making possible determining the mechanical properties of nanomaterial in a cheap method,” he added.

“An effective experiment to identify nanostrucutes is Raman spectroscopy, and its important outcome frequency of Radial Breathing Mode (RBM); this frequency helps measuring the size and properties of the material; different studies in literature have addressed determination of carbon nanotubes frequency, with some concluding that only in nanotubes such frequencies are detectable, while the vibrations have been detected in Raman spectroscopy of other nanostructures as well,” he detailed. “Drawing upon this premise, we studied the vibrations of different nanostructures to determine their structural and mechanical properties; there is a one-to-one correspondence between the geometrical characteristics of the nanostructures and their RBM frequencies; thus, an overview of the current literature discussing the RBM frequency of carbon nanostructures and their geometrical characterization is presented,” Ghavanloo said. The findings of the study provide effective help in identifying properties of nanomaterial.

 

SH/2959346

 

News Code 111734

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