Author/Authors :
Kim، نويسنده , , Yoong-Ahm and Muramatsu، نويسنده , , Hiroyuki and Kojima، نويسنده , , Masahito and Hayashi، نويسنده , , Takuya and Endo، نويسنده , , Morinobu and Terrones، نويسنده , , Mauricio and Dresselhaus، نويسنده , , Mildred S.، نويسنده ,
Abstract :
Here, we carried out Raman study on chemically doped single wall carbon nanotube (SWNT)/double-walled carbon nanotube (DWNT) mixed bucky-papers. Their highly different Raman responses (e.g., a large upshift of tangential mode of SWNT and no large changes in the frequencies of tangential mode assigned to the outer tubes of the DWNT) upon doping with the sulfuric acid could be used as a qualitative indicator of the purity of the DWNT samples with the concentration of its SWNTs contents.
