Browsing División de Nanociencias y Materiales by Author "López Urías, Florentino"
Now showing items 1-20 of 32
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Carbon sponge-type nanostructures based on coaxial nitrogen-doped multiwalled carbon nanotubes grown by CVD using benzylamine as precursor
Muñoz Sandoval, Emilio; Cortés López, Alejandro Javier; Flores Gómez, Beatriz; Fajardo Díaz, Juan Luis; Sánchez Salas, Roque; López Urías, Florentino (2017)"Carbon sponges-type nanostructures (CSTN) based on coaxial nitrogen-doped multiwalled carbon nanotubes (CA-MWCNTs) were synthesized using the aerosol assisted chemical vapor deposition method involving the decomposition ... -
Cement pastes and mortars containing nitrogen-doped and oxygen-functionalized multiwalled carbon nanotubes
Martínez Alanis, Mauricio; López Urías, Florentino (Hindawi, 2016)"Cement pastes and mortars based on ordinary Portland cement containing nitrogen-doped multiwalled carbon nanotubes (MWCNT-Nx) or oxygen-functionalized multiwalled carbon nanotubes (MWCNT-Ox) are investigated. To incorporate ... -
Cobalt double-ring and double-dot structures: Magnetic properties
López Urías, Florentino; Torres Heredia, José Jesús; Muñoz Sandoval, Emilio (2016)"The magnetization reversal mechanism of nanostructures of cobalt double-rings (D-rings) and double-dots (D-dots) is investigated in the framework of micromagnetic simulations. The arrays contain two identical coupled rings ... -
Concreto reforzado con nanotubos de carbono dopados con oxígeno y dopados con nitrógeno
Martínez Alanis, Mauricio (2015-05)"En éste trabajo se describen los efectos de la incorporación de nanotubos de carbono multipared en mezclas de morteros hidráulicos basados en cemento gris tipo Portland. Los nanotubos de carbono fabricados presentan ... -
Degradación enzimática de nanotubos de carbono dopados con nitrógeno
Azuara Tuexi, Gabriela; López Urías, Florentino; Quintana, M.; Muñoz Sandoval, Emilio (2017)"Es bien conocido que a la fecha la toxicidad de los nanotubos de carbono aún no está bien estudiada. Muy recientemente se estableció que los nanotubos de carbono llamados MWCNT-7 sean clasificados como posiblemente ... -
Effects of functionalization and doping in carbon nanotubes for fabricating field effect transistors and cluster-nanotube systems: theory and experiment
Gracia Espino, Edgar Eduardo (2011-09)"This Thesis work has the experimental and theoretical results on modified carbon nanotubes with different functional groups, doped or decorated with nanoparticles, which modify their properties and interaction with the ... -
Efficient carbon nanotube sponges production boosted by acetone in CVD-Synthesis
Cortés López, Alejandro Javier; Muñoz Sandoval, Emilio; López Urías, Florentino (2018)"A high production of nitrogen-doped carbon nanotube sponges (N-CNS) was obtained at 1020 °C with 4 h of growth in an aerosol-assisted chemical vapor deposition (AACVD) experiment modified with two independent sprayers ... -
Electron transport study on functionalized armchair graphene nanoribbons: DFT calculations
Gracia Espino, Edgar Eduardo; López Urías, Florentino; Terrones Maldonado, Humberto; Terrones Maldonado, Mauricio (2016)"Quantum transport studies are performed on doped and functionalized 8- and 11-armchair graphene nanoribbons (aGNRs) by means of density functional theory. Substitutional doping is performed by introducing boron, nitrogen, ... -
Esponjas de Nanotubos de Carbono a partir de Alcoholes
Cortés López, Alejandro Javier (2020-10)"Las esponjas de carbono están definidas como aquellas estructuras formadas por nanotubos de carbono dispuestos en un arreglo tipo tridimensional y muestran propiedades interesantes tales como: superhidrofobicidad, porosidad, ... -
Estudio experimental de nanotubos de carbono dopados con nitrógeno y de óxido de grafeno
Sánchez Salas, Roque (10/07/2017)"En esta tesis se presentan la segunda parte del estudio sistemático de síntesis y caracterización de nanotubos de carbono dopados con nitrógeno (CNx) mediante la técnica de deposición química de vapores (CVD). Partimos ... -
Furan and Pyran Functional Groups Driven the Surface of Nitrogen-Doped Nanofiber Sponges
Fajardo Díaz, Juan Luis; Rodríguez Corvera, Cristina de Lourdes; Muñoz Sandoval, Emilio; López Urías, Florentino (Wiley, 2020)"Highly surface oxidized, nitrogen?doped, and nitrogen functionalized carbon nanotube sponge (N?CFS) were produced at 1020?°C using two sprayers approach in an aerosol?assisted chemical vapor deposition (AACVD) experiment. ... -
GaN haeckelite single-layered nanostructures: monolayer and nanotubes
Camacho Mojica, Dulce Carolina; López Urías, Florentino (2015-12)"Nowadays, III-V semiconductors are interesting candidate materials for the tailoring of two dimensional (2D) graphene-like structures. These new 2D materials have attracted profound interest opening the possibility to ... -
Highly efficient production of nitrogen-doped multiwalled carbon nanotubes using banded iron formation from the Bundelkhand craton located in the north of India
Jiménez Ramírez, Luis Ernesto (2018)"Los polvos de formación de hierro bandeado (FHB) son rocas sedimentarias de la era precámbrica, formadas principalmente por bandas de óxidos de hierro y sílice. Hemos utilizado polvos de FHB del cráter de Bundelkhand, ... -
Identification of individual and few layers of WS2 using Raman Spectroscopy
Botello Méndez, Andrés Rafael; Perea López, Néstor; Elías Arriaga, Ana Laura; Vincent Crespi; López Urías, Florentino; Terrones Maldonado, Humberto; Terrones Maldonado, Mauricio (2013-04)"The Raman scattering of single-and few-layered WS2 is studied as a function of the number of S-W-S layers and the excitation wavelength in the visible range (488, 514 and 647 nm). For the three excitation wavelengths used ... -
Magnetism of carbon nanostructures and in situ TEM dynamic transformations of carbon-based nanomaterials.
Rodríguez Manzo, Julio Alejandro (2007)"Durante las últimas dos décadas se ha logrado sintetizar materiales de carbono con distintas formas estructurales y dimensiones en el orden de nanómetros, siendo los fullerenos y los nanotubos de carbono (NTC) dos ejemplos ... -
Nanoestructuras de carbono dopadas con fósforo
Martínez Iniesta, Armando David (2020)"El dopaje de nanoestructuras de carbono empleando átomos tales como B, N, O, P, entre otros, ha demostrado la capacidad de modificar sus propiedades físicas químicas, tales como la dureza, conductividad eléctrica, reducción ... -
Nitrogen–phosphorus doped graphitic nano onion-like structures: experimental and theoretical studies
Martínez Iniesta, Armando David; Morelos Gómez, Aarón; Muñoz Sandoval, Emilio; López Urías, Florentino (Royal Society of Chemistry, 2021)"Onion-like graphitic structures are of great importance in different fields. Pentagons, heptagons, and octagons are essential features of onion-like graphitic structures that could generate important properties for diverse ... -
Novel hetero-layered materials with tunable direct band gaps by sandwiching different metal disulfides and diselenides
Terrones Maldonado, Humberto; López Urías, Florentino; Terrones Maldonado, Mauricio (2013-03)"Although bulk hexagonal phases of layered semiconducting transition metal dichalcogenides (STMD) such as MoS2, WS2, WSe2 and MoSe2 exhibit indirect band gaps, a mono-layer of STMD possesses a direct band gap which could ... -
Observation of magnetic edge state in graphene nanoribbons
Joly, V. L.Joseph; Kiguchi, Manabu; Hao, Sijia; Takai, Kazuyuki; Enoki, Toshiaki; Sumii, Ryouhei; Amemiya, Kenta; Muramatsu, Hiroyukim; Hayashi, Takuya; Kim, Yoong Ahm; Endo, Morinobu; Campos Delgado, Jessica Rosaura; López Urías, Florentino; Botello Méndez, Andrés Rafael; Terrones Maldonado, Humberto; Terrones Maldonado, Mauricio; Dresselhaus, Mildred (2010-06)"The electronic structure and spin magnetism for few-layer-graphene nanoribbons synthesized by chemical vapor deposition have been investigated using near-edge x-ray absorption fine structure (NEXAFS) and electron-spin ... -
Oxygenated surface of carbon nanotube sponges: electroactivity and magnetic studies
Cortés López, Alejandro Javier; Muñoz Sandoval, Emilio; López Urías, Florentino (American Chemical Society, 2019)"We report the synthesis of nitrogen-doped carbon nanotube sponges (N-CNSs) by pyrolysis of solutions of benzylamine, ferrocene, thiophene, and isopropanol-based mixture at 1020 degrees C for 4 h using an aerosol-assisted ...