Resonance Raman spectroscopy in one-dimensional carbon materials

Mildred S Dresselhaus,Marcos A Pimenta,Ado Jorio

doi:10.1590/s0001-37652006000300004

Abstract

Brazil has played an important role in the development and use of resonance Raman spectroscopy as a powerful characterization tool for materials science. Here we present a short history of Raman scattering research in Brazil, highlighting the important contributions to the field coming from Brazilian researchers in the past. Next we discuss recent and important contributions where Brazil has become a worldwide leader, that is on the physics of quasi-one dimensional carbon nanotubes. We conclude this article by presenting results from a very recent resonance Raman study of exciting new materials, that are strictly one-dimensional carbon chains formed by the heat treatment of very pure double-wall carbon nanotube samples.

Highlights

This article is devoted to the important contributions given by Brazilians to one research subfield of Condensed Matter Physics, that of Raman spectroscopy
An important contribution Brazilians have recently made is to recognize how Raman scattering could become a useful tool for nanoscience, even though the wavelength of light is much larger than the nanometer scale
A strong and sharp feature at ∼ 1850 cm−1 was observed in the Raman spectra of double wall nanotube (DWNT) samples heat treated at high temperatures (Endo et al 2006) and, since this Raman feature only appears at specific annealing temperatures (Thtt) that occur just below the Thtt needed for full coalescence of DWNTs, it was named the coalescence-inducing mode (CIM)

Summary

INTRODUCTION

This article is devoted to the important contributions given by Brazilians to one research subfield of Condensed Matter Physics, that of Raman spectroscopy. The Brazilians in the past have an impressive historical record for important contributions to Raman Spectroscopy. Their leadership in the field has benefited Brazilian Science overall by giving excellent training to young people and giving them a vision that they can contribute importantly to world science much more broadly. Others may have had this capability, but they did not develop this approach into a form where interesting three-dimensional maps highlighting important physical effects could be made With this tunable laser system many findings were made that could not have been observed before, and these findings have had a lot of impact. We briefly list some of the recent contributions from Brazilians to nanoscience

RAMAN SCATTERING RESEARCH IN BRAZIL

FINAL REMARKS