Repositorio IPICyT: Recent submissions

Now showing items 1421-1440 of 2290

    • Synthesis and characterization of GaN rods prepared by ammono-chemical vapor deposition 

      Carbajal Arizaga, Gregorio Guadalupe; Chávez Hernández, Karina Viridiana; Cayetano Castro, Nicolás; Herrera Zaldívar, Manuel; García Gutiérrez, Rafael; Contreras López, Oscar Edel (2012-04)
      "GaN rods were deposited by chemical vapor deposition (CVD) onto sapphire (0 0 0 1) and amorphous quartz. The reactive Ga species in vapor the phase was formed with NH4Cl and gallium. The unidirectional growth was catalyzed ...

    • Refrigerant capacity of austenite in as-quenched and annealed Ni51.1Mn31.2In17.7 melt spun ribbons 

      Sánchez Llamazares, José Luis; Flores Zúñiga, Horacio; Sánchez Valdés, Cesar Fidel; Ross, Caroline A.; Garcia, Carlos (2012-04)
      "The thermal dependence of the magnetic entropy change (Delta S-M(T)) and refrigerant capacity (RC) of austenite in as-quenched ribbons of chemical composition Ni51.1Mn31.2In17.7 produced by melt spinning at a high cooling ...

    • Transformation behavior and inverse caloric effects in magnetic shape memory Ni44-xCuxCo6Mn39Sn11 ribbons 

      Wójcik, Anna; Maziarz, Wojciech; Szczerba, Maciej; Sikora, Marcin; Zywczak, Antoni; Aguilar Ortiz, Christian Omar; Álvarez Alonso, Pablo; Villa, Elena; Flores Zúñiga, Horacio; Cesari, Eduard; Dutkiewicz, Jan; Chernenko, Volodymyr (2017-10)
      "An influence of the Cu doping on structural, magnetic and thermoelastic properties of the Heusler Ni44-xCuxCo6Mn39Sn11 (x = 1–4 at%) ribbons has been investigated. It is found that the addition of Cu stabilizes austenite ...

    • Electrochemical and mechanical behavior in polycrystalline CoNi-Ga shape memory alloys 

      Sánchez Carrillo, Mario; Flores de los Ríos, Juan Pablo; Huape Padilla, Engelbert; Bautista Margulis, Raúl Germán; Flores Zúñiga, Horacio; Chacón Nava, José Guadalupe; Martínez Villafañe, Alberto (2014)
      "Electrochemical behavior and microstructure was studied in polycrystalline Co38.3Ni32.1Ga29.6 alloy using the electrochemical technique of polarization curves in a medium of 3.5 wt % NaCl and 0.5M H2SO4. The importance ...

    • Kinetic arrest of direct and reverse martensitic transformation and exchange bias effect in Mn49.5Ni40.4In10.1 melt spun ribbons 

      Sánchez Llamazares, José Luis; Hernando, Blanca; Suñol, Joan Josep.; Garcia, Carlos; Ross, Caroline A. (2010-05)
      "Phase coexistence phenomena related to direct and reverse martensitic transformation have been studied in melt spun ribbons of the magnetic shape memory alloy Mn49.5Ni40.4In10.1. For magnetic fields above 10 kOe martensitic ...

    • Analysis of Ostwald ripening in Ni-rich Ni–Ti alloys by diffusion couples 

      Garay Reyes, Carlos. G.; Hernández Santiago, Felipe.; Cayetano Castro, Nicolás; Martínez Sánchez, Roberto; Hernández Rivera, José Luis; Dorantes Rosales, Héctor Javier; Cruz Rivera, José de Jesús. (2014)
      "The coarsening kinetics of gamma' precipitates in Ni-rich Ni-Ti alloys are studied using a Ni-11-5 wt% Ti and pure Ni diffusion couple. The formed concentration gradient allowed to study the aging process at 1023 K (750 ...

    • Enhanced refrigerant capacity and magnetic entropy flattening using a two-amorphous FeZrB(Cu) composite 

      Álvarez Alonso, Pablo; Sánchez Llamazares, José Luis; Gorria, Pedro; Blanco Rodríguez, Jesús Angel (2011-12)
      "The temperature dependence of the isothermal magnetic entropy change, Delta S-M, and the magnetic field dependence of the refrigerant capacity, RC, have been investigated in a composite system xA + (1 - x) B, based on ...

    • Design of graphene electronic devices using nanoribbons of different widths 

      Gerardo Naumis; Terrones Maldonado, Mauricio; Terrones Maldonado, Humberto; Gaggero Sager, Luis Manuel (2009-10)
      "We present a simple design of a field effect transistor based on graphene nanoribbons, taking advantage of the metallic and semiconductor nature of nanoribbons with different widths. Such device could be constructed by ...

    • Large and reversible elastocaloric effect near room temperature in a Ga-doped Ni–Mn–In metamagnetic shape-memory alloy 

      Camarillo García, Juan Pablo Ramón; Aguilar Ortiz, Christian Omar; Flores Zúñiga, Horacio; Ríos Jara, David; Soto-Parra, Daniel Enrique; Stern Taulats, Enric; Mañosa, Lluis; Planes, Antoni (2017-02)
      "We report a giant elastocaloric effect near room temperature in a polycrystalline Ga-doped Ni-Mn-In ferromagnetic shape-memory alloy. The elastocaloric effect has been quantified by measuring both isothermal stress-induced ...

    • Controlled growth of one-dimensional clusters of molybdenum atoms using double-walled carbon nanotube templating 

      Tao, Yousheng; Muramatsu, Hiroyukim; Hayashi, Takuya; Kim, Yoong Ahm; Shimamoto, Daisuke; Endo, Morinobu; Kaneko, Katsumi; Terrones Maldonado, Mauricio; Dresselhaus, Mildred (2009)
      "We report the controlled growth of one-dimensional clusters of molybdenum atoms inside the inner cores of double-walled carbon nanotubes. A combined characterization including high resolution transmission electron microscopy, ...

    • Strong and stable photoluminescence from the semiconducting inner tubes within double walled carbon nanotubes 

      Shimamoto, Daisuke; Muramatsu, Hiroyukim; Hayashi, Takuya; Endo, Morinobu; Park, Jin Sung; Saito, Riichiro; Terrones Maldonado, Mauricio; Dresselhaus, Mildred (2009-01)
      "We examined the optical features of single wall carbon nanotubes (SWNTs) and the inner tubes within double walled carbon nanotubes (DWNTs) having the same (n,m) chirality. The brighter and more stable photoluminescence ...

    • Diameter-selective separation of double-walled carbon nanotubes 

      Kim, Jin-hee; Kataoka, Masaskazu; Kim, Yoong Ahm; Shimamoto, Daisuke; Muramatsu, Hiroyukim; Hayashi, Takuya; Endo, Morinobu; Terrones Maldonado, Mauricio; Dresselhaus, Mildred (2008-12)
      "Here, we report a simple and effective way of separating double-walled carbon nanotubes as a function of their diameter using individually dispersed nanotube solutions with the aid of long and random single-stranded DNA. ...

    • Modelling adsorption isotherms of binary mixtures of carbon dioxide, methane and nitrogen 

      Castro Esparza, Martín Gilberto; Martínez Bórquez, Alejandro; Gil-Villegas Montiel, Alejandro (2011)
      "A molecular-based approach for modelling mixtures adsorbed onto solid surfaces using the Statistical Associating Fluid Theory for Potentials of Variable Range (SAFT-VR) for three- and two-dimensional systems is presented ...

    • Nonlinear optical absorption and reflection of single wall carbon nanotube thin films by ZZ-scan technique 

      Terrones Maldonado, Mauricio (2008-02)
      "Both the nonlinear optical transmission and reflection characteristics of HiPco-based single wall carbon nanotube (SWNT) thin films are studied by using the ZZ-scan method with femtosecond laser pulses at a wavelength of ...

    • CdSe quantum dot-decorated double walled carbon nanotubes: the effect of chemical moieties 

      Kim, Yoong Ahm; Muramatsu, Hiroyukim; Park, Ki-chul; Shimamoto, Daisuke; Jung, Yong-chae; Kim, Jin-hee; Hayashi, Takuya; Saito, Yasunori; Endo, Morinobu; Terrones Maldonado, Mauricio; Dresselhaus, Mildred (2008-08)
      "We report that fluorine atoms on the outer tubes of double walled carbon nanotubes (DWNTs) are more effective for nucleating and growing CdSe nanoparticles than oxygen-containing functional groups. The CdSe particles with ...

    • Adiabatic magnetocaloric effect in Ni50Mn35In15 ribbons 

      Álvarez Alonso, Pablo; Aguilar Ortiz, Christian Omar; Camarillo García, Juan Pablo Ramón; Salazar Jaramillo, Daniel; Flores Zúñiga, Horacio; Chernenko, Volodymyr (2016-11)
      "Heusler-type Ni-Mn-based metamagnetic shape memory alloys (MetaMSMAs) are promising candidates for magnetic refrigeration. To increase heat exchange rate and efficiency of cooling, the material should have a high ...

    • Enhanced thermal conductivity of carbon fiber/phenolic resin composites by the introduction of carbon nanotubes 

      Kim, Yoong Ahm; Kamio, S.; Tajiri, Takeyuki; Hayashi, Takuya; Song, Sungmoo; Endo, Morinobu; Terrones Maldonado, Mauricio; Dresselhaus, Mildred (2007-02)
      "The authors report a significant enhancement in the thermal conductivity of a conventional carbon fiber/phenolic resin composite system when adding highly crystalline multiwalled carbon nanotubes. They demonstrate that ...

    • An anticorrosive magnesium/carbon nanotube composite 

      Endo, Morinobu; Hayashi, Takuya; Itoh, Isao; Kim, Yoong Ahm; Shimamoto, Daisuke; Muramatsu, Hiroyukim; Shimizu, Yasuo; Morimoto, Shingo; Terrones Maldonado, Mauricio; Iinou, Satoshi; Koide, S. (2008-02)
      "Here, we report a drastically improved anticorrosive characteristic of magnesium alloy composites with the introduction of multiwalled carbon nanotubes. Highly depressed corrosion of nanotube-filled magnesium composite ...

    • Enhanced refrigerant capacity in two-phase nanocrystalline/amorphous NdPrFe17 melt-spun ribbons 

      Sánchez Valdés, Cesar Fidel; Ibarra Gaytán, Pablo Jesús; Sánchez Llamazares, José Luis; Ávalos Borja, Miguel; Álvarez Alonso, Pablo; Gorria, Pedro; Blanco Rodríguez, Jesús Angel (2014-05)
      "he magnetocaloric properties of NdPrFe17 melt-spun ribbons composed of nanocrystallites surrounded by an intergranular amorphous phase have been studied. The nanocomposite shows two successive second-order magnetic phase ...

    • Enhanced refrigerant capacity in Gd-Al-Co microwires with a biphase nanocrystalline/amorphous structure 

      Shen, Hongexian; Xing, Dawei; Sánchez Llamazares, José Luis; Sánchez Valdés, Cesar Fidel; Belliveau, H. F.; Wang, Huan; Qin, Faxiang; Liu, Yanfen; Sun, Jianfei; Srikanth, Hariharan; Phan, Manhhuong (2016-02)
      "A class of biphase nanocrystalline/amorphous Gd(50+5x)Al(30-5x)Co20 (x = 0, 1, 2) microwires fabricated directly by melt-extraction is reported. High resolution transmission electron microscopy and Fourier function transform ...