Search Results - "Filho, A.G. Souza"

Effects of pressure on the structural and electronic properties of linear carbon chains encapsulated in double wall carbon nanotubes by Neves, W.Q., Alencar, R.S., Ferreira, R.S., Torres-Dias, A.C., Andrade, N.F., San-Miguel, A., Kim, Y.A., Endo, M., Kim, D.W., Muramatsu, H., Aguiar, A.L., Souza Filho, A.G.

“…High-pressure resonance Raman experiments were performed on linear carbon chains Cn confined in double-wall carbon nanotubes (Cn@DWCNT). Our results indicate…”
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Linear carbon chains encapsulated in multiwall carbon nanotubes: Resonance Raman spectroscopy and transmission electron microscopy studies by Andrade, N.F., Vasconcelos, T.L., Gouvea, C.P., Archanjo, B.S., Achete, C.A., Kim, Y.A., Endo, M., Fantini, C., Dresselhaus, M.S., Souza Filho, A.G.

“…In this paper we report the characterization of linear carbon chains encapsulated in multiwalled carbon nanotubes by using Raman spectroscopy and transmission…”
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From high pressure radial collapse to graphene ribbon formation in triple-wall carbon nanotubes by Silva-Santos, S.D., Alencar, R.S., Aguiar, A.L., Kim, Y.A., Muramatsu, H., Endo, M., Blanchard, N.P., San-Miguel, A., Souza Filho, A.G.

“…The radial stability and the irreversible transformation of triple-wall carbon nanotubes (TWCNTs) bundles are investigated at high pressure conditions both…”
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Delamination of multilayer graphene stacks from its substrate through wrinkle formation under high pressures by Amaral, I.R., Forestier, A., Piednoir, A., Galafassi, R., Bousige, C., Machon, D., Pierre-Louis, O., Alencar, R.S., Souza Filho, A.G., San-Miguel, A.

“…There is a need to find new paths for van der Waals 2D-systems detachment and transfer or to control their adhesion state in different environments. We have…”
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Raman resonance tuning of quaterthiophene in filled carbon nanotubes at high pressures by Alencar, R.S., Aguiar, A.L., Ferreira, R.S., Chambard, R., Jousselme, B., Bantignies, J.-L., Weigel, C., Clément, S., Aznar, R., Machon, D., Souza Filho, A.G., San-Miguel, A., Alvarez, L.

“…Filling carbon nanotubes with molecules is a route for the development of electronically modified one-dimensional hybrid structures for which the interplay…”
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Pressure-induced radial collapse in few-wall carbon nanotubes: A combined theoretical and experimental study by Alencar, R.S., Cui, Wenwen, Torres-Dias, A.C., Cerqueira, Tiago F.T., Botti, Silvana, Marques, Miguel A.L., Ferreira, O.P., Laurent, Ch, Weibel, A., Machon, D., Dunstan, D.J., Souza Filho, A.G., San-Miguel, A.

“…We study the pressure induced collapse of single-, double- and triple-wall carbon nanotubes. Theoretical simulations were performed using density-functional…”
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Ab initio study of covalently functionalized carbon nanotubes by Veloso, Marcos V., Souza Filho, A.G., Mendes Filho, J., Fagan, Solange B., Mota, R.

“…In this Letter, the electronic and structural properties of the –COOH, –NH 2, and –CONH 2 groups, used as sidewall functionalizations by interacting with an…”
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Ab initio study of 2,3,7,8-tetrachlorinated dibenzo-p-dioxin adsorption on single wall carbon nanotubes by Fagan, Solange B., Santos, E.J.G., Souza Filho, A.G., Mendes Filho, J., Fazzio, A.

“…The interaction of 2,3,7,8-tetrachlorinated dibenzo-p-dioxin (dioxin) with carbon nanotubes is analyzed by ab initio methods. It was found that the dioxin…”
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Charge transfer effects in acid treated single-wall carbon nanotubes by Barros, E.B., Filho, A.G. Souza, Lemos, V., Filho, J. Mendes, Fagan, S.B., Herbst, M.H., Rosolen, J.M., Luengo, C.A., Huber, J.G

“…Single-wall carbon nanotubes (SWNTs) prepared by the arc discharge method were oxidized using nitric acid. The samples were analyzed by using Raman scattering…”
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Size-controllable synthesis of nanosized-TiO2 anatase using porous Vycor glass as template by Mazali, I.O., Filho, A.G. Souza, Viana, B.C., Filho, J. Mendes, Alves, O.L.

“…In this paper we report the synthesis and characterization of TiO^sub 2^ nanocrystal dispersed into a porous Vycor glass. We have obtained very small TiO^sub…”
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Optical absorption of graphite and single-wall carbon nanotubes by SAITO, R, GRÜNEIS, A, SAMSONIDZE, G. G, DRESSELHAUS, G, DRESSELHAUS, M. S, JORIO, A, CANCADO, L. G, PIMENTA, M. A, SOUZA, A. G

“…A review of the electronic dipole transitions in graphite and single-wall carbon nanotubes is presented. Because of its singular electronic structure, the…”
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Dispersive Raman spectra observed in graphite and single wall carbon nanotubes by Saito, R., Jorio, A., Souza Filho, A.G., Grueneis, A., Pimenta, M.A., Dresselhaus, G., Dresselhaus, M.S.

“…The disorder-induced D-band and some other non-zone center Raman modes of graphite and single wall carbon nanotubes are assigned to phonon modes in their…”
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Resonant Raman spectra of carbon nanotube bundles observed by perpendicularly polarized light by Grüneis, A., Saito, R., Jiang, J., Samsonidze, Ge.G., Pimenta, M.A., Jorio, A., Souza Filho, A.G., Dresselhaus, G., Dresselhaus, M.S.

“…We calculated the resonance condition for the radial breathing Raman mode for single wall carbon nanotube (SWNT) bundles for light polarization parallel and…”
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Probing the electronic trigonal warping effect in individual single-wall carbon nanotubes using phonon spectra by Souza Filho, A.G, Jorio, A, Samsonidze, Ge.G, Dresselhaus, G, Dresselhaus, M.S, Swan, Anna K, Ünlü, M.S, Goldberg, B.B, Saito, R, Hafner, J.H, Lieber, C.M, Pimenta, M.A

“…We have studied the trigonal warping effect in metallic carbon nanotubes using resonance Raman scattering and examining the G ′-band profile for individual…”
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Structural and vibrational properties of nanocrystals by Mazali, I.O., Viana, B.C., Alves, O.L., Mendes Filho, J., Souza Filho, A.G.

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Advances in single nanotube spectroscopy: Raman spectra from cross-polarized light and chirality dependence of Raman frequencies by Jorio, A., Pimenta, M.A., Fantini, C., Souza, M., Souza Filho, A.G., Samsonidze, Ge.G., Dresselhaus, G., Dresselhaus, M.S., Saito, R.

“…This work discusses new results obtained from analysis of Raman signal from isolated single wall carbon nanotubes. (1) Study of tangential (G band) modes…”
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Pressure-induced structural transformations on linear carbon chains encapsulated in carbon nanotubes: A potential route for obtaining longer chains and ultra-hard composites by Neves, W.Q., Ferreira, R.S., Kim, Y.A., Endo, M., Choi, G.B., Muramatsu, H., Aguiar, A.L., Alencar, R.S., Souza Filho, A.G.

“…In this paper, we report high-pressure Raman experiments (0 − 28 GPa) in two different systems, i.e., linear carbon chains encapsulated by multi-walled…”
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Computational study of elastic, structural stability and dynamics properties of penta-graphene membrane by De Sousa, J.M., Aguiar, A.L., Girão, E.C., Fonseca, Alexandre F., Souza Filho, A.G., Galvão, D.S.

“…Recently, a new two-dimensional carbon allotrope called Penta-graphene membrane was proposed. The Penta-graphene membrane exhibits interesting mechanical and…”
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Elastic properties of graphyne-based nanotubes by De Sousa, J.M., Bizao, R.A., Sousa Filho, V.P., Aguiar, A.L., Coluci, V.R., Pugno, N.M., Girao, E.C., Souza Filho, A.G., Galvao, D.S.

“…[Display omitted] Graphyne nanotubes (GNTs) are nanostructures obtained from rolled up graphyne sheets, in the same way carbon nanotubes (CNTs) are obtained…”
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Biochar as a carbonaceous material to enhance soil quality in drylands ecosystems: A review by Nascimento, Ícaro Vasconcelos do, Fregolente, Laís Gomes, Pereira, Arthur Prudêncio de Araújo, Nascimento, Carla Danielle Vasconcelos do, Mota, Jaedson Cláudio Anunciato, Ferreira, Odair Pastor, Sousa, Helon Hébano de Freitas, Silva, Débora Gonçala Gomes da, Simões, Lucas Rodrigues, Souza Filho, A.G., Costa, Mirian Cristina Gomes

“…Drylands are fragile environments that should be carefully managed to improve their quality and functions to achieve sustainable development. Their major…”
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