Roberto A. R. Junior

Silvia L. Fernandes¹, 

Lucas J. Affonço², 

Roberto A. R. Junior², 

José H. D. da Silva², 

Elson Longo¹, 

Carlos F. de O. Graeff² 

¹Chemistry Department, Federal University of São Carlos (UFSCAR), 

²Physics Department, School of Sciences, São Paulo State University (UNESP)