%0 Journal Article %1 WOS:000334730300046 %A Alencar, R S %A Aguiar, A L %A Paschoal, A R %A Freire, P T C %A Kim, Y A %A Muramatsu, H %A Endo, M %A Terrones, H %A Terrones, M %A San-Miguel, A %A Dresselhaus, M S %A Filho, A G Souza %C 1155 16TH ST, NW, WASHINGTON, DC 20036 USA %D 2014 %I AMER CHEMICAL SOC %J JOURNAL OF PHYSICAL CHEMISTRY C %K imported %N 15 %P 8153-8158 %R 10.1021/jp4126045 %T Pressure-Induced Selectivity for Probing Inner Tubes in Double- and Triple-Walled Carbon Nanotubes: A Resonance Raman Study %V 118 %X The dependence of the radial breathing modes (RBMs) and the tangential mode (G-band) of triple-wall carbon nanotubes (TWCNTs) under hydrostatic pressure is reported. Pressure screening effects are observed for the innermost tubes of TWCNTs similar to what has been already found for DWCNTs. However, using the RBM pressure coefficients in conjunction with the histogram of the diameter distribution, we were able to separate the RBM Raman contribution related to the intermediate tubes of TWCNTs from that related to the inner tubes of DWCNTs. By combining Raman spectroscopy and high-pressure measurements, it was possible to identify these two categories of inner tubes even if the two tubes exhibit the same diameters because their pressure response is different. Furthermore, it was possible to observe similar RBM profiles for the innermost tubes of TWCNTs using different resonance laser energies but also under different pressure conditions. This is attributed to changes in the electronic transition energies caused by small pressure-induced deformations. By using Raman spectroscopy, it was possible to estimate the displacement of the optical energy levels with pressure.

@article{WOS:000334730300046, abstract = {The dependence of the radial breathing modes (RBMs) and the tangential mode (G-band) of triple-wall carbon nanotubes (TWCNTs) under hydrostatic pressure is reported. Pressure screening effects are observed for the innermost tubes of TWCNTs similar to what has been already found for DWCNTs. However, using the RBM pressure coefficients in conjunction with the histogram of the diameter distribution, we were able to separate the RBM Raman contribution related to the intermediate tubes of TWCNTs from that related to the inner tubes of DWCNTs. By combining Raman spectroscopy and high-pressure measurements, it was possible to identify these two categories of inner tubes even if the two tubes exhibit the same diameters because their pressure response is different. Furthermore, it was possible to observe similar RBM profiles for the innermost tubes of TWCNTs using different resonance laser energies but also under different pressure conditions. This is attributed to changes in the electronic transition energies caused by small pressure-induced deformations. By using Raman spectroscopy, it was possible to estimate the displacement of the optical energy levels with pressure.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, author = {Alencar, R S and Aguiar, A L and Paschoal, A R and Freire, P T C and Kim, Y A and Muramatsu, H and Endo, M and Terrones, H and Terrones, M and San-Miguel, A and Dresselhaus, M S and Filho, A G Souza}, biburl = {https://www.bibsonomy.org/bibtex/2bf08c324368296d70f54f069d1cc1d68/ppgfis_ufc_br}, doi = {10.1021/jp4126045}, interhash = {56afe3c57f80f71b66b2ca0b54021e87}, intrahash = {bf08c324368296d70f54f069d1cc1d68}, issn = {1932-7447}, journal = {JOURNAL OF PHYSICAL CHEMISTRY C}, keywords = {imported}, number = 15, pages = {8153-8158}, publisher = {AMER CHEMICAL SOC}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Pressure-Induced Selectivity for Probing Inner Tubes in Double- and Triple-Walled Carbon Nanotubes: A Resonance Raman Study}, tppubtype = {article}, volume = 118, year = 2014 }