Listar por autor "Castro-García, Socorro"

Mostrando ítems 1-20 de 24

    • A simple solvothermal synthesis of MFe2O4 (M=Mn, Co and Ni) nanoparticles 

      Yáñez Vilar, Susana; Sánchez-Andújar, Manuel; Gómez Aguirre, Lilián Claudia; Mira Pérez, Jorge; Señarís-Rodríguez, M. A.; Castro-García, Socorro (Elsevier, 2009-10)
      [Abstract] Nanoparticles of MFe2O4 (M=Mn, Co and Ni), with diameters ranging from 5 to 10 nm, have been obtained through a solvothermal method. In this synthesis, an alcohol (benzyl alcohol or hexanol) is used as both a ...

    • Anomalous and Colossal Thermal Expansion, Photoluminescence, and Dielectric Properties in Lead Halide-Layered Perovskites With Cyclohexylammonium and Cyclopentylammonium Cations 

      Cuquejo-Cid, Alberto; García-Fernández, Alberto; Popescu, Catalin; Bermúdez-García, Juan Manuel; Señarís-Rodríguez, M. A.; Castro-García, Socorro; Vázquez, Digna; Sánchez-Andújar, Manuel (Elsevier, 2022-06-03)
      [Abstract] A detailed study of lead halide-layered perovskites with general formula A2PbX4 (where A is cyclohexylammonium (CHA) or cyclopentylammonium (CPA) cation and X is Cl− or Br− anion) is presented. Using variable ...

    • Apparent colossal dielectric constants in nanoporous Metal Organic Frameworks 

      Sánchez-Andújar, Manuel; Yáñez-Vilar, Susana; Pato-Doldán, Breogán; Gómez-Aguirre, Claudia; Castro-García, Socorro; Señarís-Rodríguez, M. A. (American Chemical Society (ACS), 2012-05-30)
      [Abstract] In this work, we show that the hybrid material Co2(1,4-bdc)2(dabco)•[4DMF•1H2O], shows an apparent colossal dielectric constant at room temperature (r5000 at 300 K for =100 Hz). Nevertheless, such response ...

    • Charge ordering and dielectric properties in the near half-doped Pr0.79Na0.21MnO3 perovskite 

      Sánchez-Andújar, Manuel; Yáñez Vilar, Susana; Castro-García, Socorro; Señarís-Rodríguez, M. A. (Elsevier, 2008-06)
      [Abstract] The Pr0.79Na0.21MnO3 perovskite has been prepared in polycrystalline form by a ceramic method. We have carried out its structural characterization by synchrotron X-ray powder diffraction (SXRPD) at room temperature ...

    • Coexistence of magnetic and electrical order in the new perovskite-like (C3N2H5)[Mn(HCOO)3] formate 

      Pato Doldán, Breogán; Gómez Aguirre, Lilián Claudia; Bermúdez-García, Juan Manuel; Sánchez-Andújar, Manuel; Fondado Fondado, Alfonso; Mira Pérez, Jorge; Castro-García, Socorro; Señarís-Rodríguez, M. A. (The Royal Society of Chemistry, 2013-09)
      [Abstract] In this work we further the structural characterization of the recently discovered (C3N2H5)[Mn(HCOO)3] metal–organic framework with perovskite-like structure, and we present its magnetic and dielectric properties ...

    • Diimidazolium Halobismuthates [Dim]2[Bi2X10] (X = Cl–, Br–, or I–): A New Class of Thermochromic and Photoluminescent Materials 

      García-Fernández, Alberto; Marcos-Cives, Ismael; Platas-Iglesias, Carlos; Castro-García, Socorro; Vázquez, Digna; Fernández, Alberto; Sánchez-Andújar, Manuel (American Chemical Society (ACS), 2018-06-12)
      [Abstract] We present a novel family of polyhalide salts of Bi(III) with the general formula [Dim]2[Bi2X10], where Dim2+ is the diimidazolium cation (C9H14N4)2+ and X is Cl–, Br–, or I–. Single-phase materials are easily ...

    • Discovery of Colossal Breathing-Caloric Effect under Low Applied Pressure in the Hybrid Organic–Inorganic MIL-53(Al) Material 

      García Ben, Javier; López-Beceiro, Jorge; Artiaga, Ramón; Salgado-Beceiro, Jorge; Delgado Ferreiro, Ignacio; Kolen'ko, Yury V.; Castro-García, Socorro; Señarís-Rodríguez, M. A.; Sánchez-Andújar, Manuel; Bermúdez-García, Juan Manuel (American Chemical Society, 2022-03-30)
      [Abstract] In this work, “breathing-caloric” effect is introduced as a new term to define very large thermal changes that arise from the combination of structural changes and gas adsorption processes occurring during ...

    • Empowering CO2Eco-Refrigeration With Colossal Breathing-Caloric-Like Effects in MOF-508b 

      Gelpi Santos, María; García Ben, Javier; Rodríguez-Hermida, Sabina; López-Beceiro, Jorge; Artiaga, Ramón; Baaliña Insua, Alvaro; Romero Gómez, Manuel; Romero Gómez, Javier; Zaragoza, Sonia; Salgado-Beceiro, Jorge; Walker, Julian; McMonagle, Charles James; Castro-García, Socorro; Sánchez-Andújar, Manuel; Señarís-Rodríguez, M. A.; Bermúdez-García, Juan Manuel (Wiley, 2024)
      [Abstract] Today,≈20% of the electric consumption is devoted to refrigeration; while,≈50% of the final energy is dedicated to heating applications. In this scenario,many cooling devices and heat-pumps are transitioning ...

    • Influence of aluminum doping on the properties of LiCoO2 and LiNi0.5Co0.5O2 oxides 

      Castro-García, Socorro; Castro Couceiro, Ada; Señarís-Rodríguez, M. A.; Soulette, F.; Julien, C. (Elsevier, 2003-01)
      We have prepared LiCo1−yAlyO2 and LiNi0.5−yAlyCo0.5O2 (0≤y≤0.3) powder samples by a low temperature sol–gel method using succinic acid as chelating agent. We have studied the details of their crystallographic and local ...

    • IR characterization of Ln2−xSrxCoO4 (x≥1; Ln=La, Nd) oxides 

      Castro-García, Socorro; Sánchez-Andújar, Manuel; Rey Cabezudo, Carlos José; Señarís-Rodríguez, M. A.; Julien, C. (Elsevier, 2001-07)
      [Abstract] We have recorded the FTIR spectra of powder samples of Ln2−xSrxCoO4 (Ln=La, Nd) at room temperature. We have identified the infrared active modes (3A2u+4Eu), and analyzed how they change as a function of Ln and ...

    • Layered LiNi0.5Co0.5O2 cathode materials grown by soft-chemistry via various solution methods 

      Julien, C.; Letranchant, C.; Rangan, S.; Lemal, M.; Ziolkiewicz, S.; Castro-García, Socorro; El-Farh, L.; Benkaddour, M. (Elsevier, 2000-07)
      [Abstract] The lithiated nickel–cobalt oxide LiNi0.5Co0.5O2 used as cathode material was grown at low-temperature using different aqueous solution methods. The wet chemistry involved the mixture of metal salts (acetates ...

    • LiCo1−yMyO2 positive electrodes for rechargeable lithium batteries: II. Nickel substituted materials grown by the citrate method 

      Julien, C.; Amdouni, A.; Castro-García, Socorro; Selmane, M.; Rangan, S. (Elsevier, 2006-03)
      [Abstract] The layered LiCo1−yNiyO2 microcrystalline powders were synthesized by a sol–gel method using citric acid as a chelating agent in the range 0.2 ≤ y ≤ 0.8. Submicron-sized particles of the precursor were obtained ...

    • Lithiated cobaltates for lithium-ion batteries: Structure, morphology and electrochemistry of oxides grown by solid-state reaction, wet chemistry and film deposition 

      Julien, C.; Castro-García, Socorro (Elsevier, 2001-07)
      [Abstract] We present the structural (XRD and Raman) and electrochemical properties of various oxides of the cobaltate family (with the α-NaFeO2-type structure) grown by solid-state reaction, wet chemistry and film deposition ...

    • Magnetic and electronic properties of lithium cobalt oxide substituted by nickel 

      Gendron, F.; Castro-García, Socorro; Popova, E.; Ziolkiewicz, S.; Soulette, F.; Julien, C. (Elsevier, 2003-02)
      [Abstract] We measured susceptibility, electron-spin resonance, magnetization and electrical conductivity of LiCo1−yNiyO2 powders synthesized by wet-chemistry method using succinic acid as chelating agent. We found unusual ...

    • Magnetoelectric behavior in the complex CaMn7O12 perovskite 

      Sánchez-Andújar, Manuel; Yáñez Vilar, Susana; Biskup, Nevenko; Castro-García, Socorro; Mira Pérez, Jorge; Rivas Rey, José; Señarís-Rodríguez, M. A. (Elsevier, 2009)
      [Abstract] We report a magnetoelectric effect in the double perovskite CaMn7O12, that shows a complex magnetic behavior below 90 K with two magnetic phases coexisting (one ferrimagnetic and the other modulated). A second ...

    • Narrowing the Tolerance Factor Limits for Hybrid Organic-Inorganic Dicyanamide-Perovskites 

      García Ben, Javier; García-Fernández, Alberto; Dafonte Rodríguez, Pedro; Delgado Ferreiro, Ignacio; Cappel, Ute; Castro-García, Socorro; Sánchez-Andújar, Manuel; Bermúdez-García, Juan Manuel; Señarís-Rodríguez, M. A. (Elsevier, 2022-10-11)
      [Abstract] In this work we focus in setting the limits of the tolerance factor and the size of the A-cations that stabilize the perovskite structure in hybrid dicyanamide compounds [A][Mn(dca)3]. For this purpose, we propose ...

    • Near Room Temperature Dielectric Transition in the Perovskite Formate Framework [(CH₃)₂NH₂][Mg(HCOO)₃] 

      Pato Doldán, Breogán; Sánchez-Andújar, Manuel; Gómez Aguirre, Lilián Claudia; Yáñez Vilar, Susana; López-Beceiro, Jorge; Gracia Fernández, Carlos; Haghighirad, A. A.; Ritter, F.; Castro-García, Socorro; Señarís-Rodríguez, M. A. (The Royal Society of Chemistry, 2012-05)
      [Abstract] We report that the hybrid organic–inorganic compound [(CH₃)₂NH₂][Mg(HCOO)₃] shows a marked dielectric transition around Tₜ ∼ 270 K, associated to a structural phase transition from SG R[3 with combining macron]c ...

    • Near-Room-Temperature Reversible Giant Barocaloric Effects in [(CH₃)₄N]Mn[N₃]₃ Hybrid Perovskite 

      Salgado-Beceiro, Jorge; Silva, Ariel Nonato Almeida de Abreu; Silva, Rosivaldo Xavier da; García-Fernández, Alberto; Sánchez-Andújar, Manuel; Castro-García, Socorro; Stern-Taulats, Enric; Señarís-Rodríguez, M. A.; Moya, Xavier; Bermúdez-García, Juan Manuel (Royal Society of Chemistry, 2020-09-25)
      [Abstract] We report giant reversible barocaloric effects in [(CH₃)₄N]Mn[N₃]₃ hybrid organic–inorganic perovskite, near its first-order cubic-monoclinic structural phase transition at 𝑇₀ ∼ 305 K. When driving the transition ...

    • Peculiarities in the electrical and magnetic properties of cobalt perovskites Ln1−xMxCoO3 (Ln3+: La3+, M2+: Ca2+, Sr2+, Ba2+; Ln3+: Nd3+, M2+: Sr2+) 

      Señarís-Rodríguez, M. A.; Breijo, M.P.; Castro-García, Socorro; Rey Cabezudo, Carlos José; Sánchez, M.; Sánchez, R.D.; Mira Pérez, Jorge; Fondado Fondado, Alfonso; Rivas Rey, José (Elsevier, 1999-09)
      We refer here to the electrical and magnetic properties of the Ln1−xMxCoO3 systems (Ln3+: La3+, M2+: Ca2+, Sr2+, Ba2+; Ln3+: Nd3+, M2+: Sr2+), paying special attention to those ferromagnetic compounds that display M–I ...

    • Preparation of Functionalized Magnetic Nanoparticles Conjugated with Feroxamine and Their Evaluation for Pathogen Detection 

      Martínez Matamoros, Diana; Castro-García, Socorro; Balado, Miguel; Matamoros Veloza, Adriana; Camargo-Valero, Miller Alonso; Óscar, Céspedes; Rodríguez, Jaime; Lemos, Manuel L.; Jiménez, Carlos (Royal Society of Chemistry, 2019-05-01)
      [Abstract] This work reports the preparation of a conjugate between amino-functionalized silica magnetite and the siderophore feroxamine. The morphology and properties of the conjugate and intermediate magnetic nanoparticles ...