Departamento de Geología

Laboratorio Microscopio de Transmisión de Alta Resolución (HR-TEM)

 Laboratorio Microscopio de Transmisión de Alta Resolución (HR-TEM)

Descripción

El microscopio de electrónico de transmisión (TEM, por sus siglas en inglés) es una herramienta analítica que permite observar características micro y nanoestructurales de materiales sólidos. Con el TEM es posible resolver a escala atómica la estructura cristalina de metales, óxidos, cerámicas, materiales bidimensionales y carbonosos, así como también analizar su composición elemental a escala nanométrica. TEM es una herramienta fundamental para la investigación en Ingeniería y Ciencias, Ciencia de Materiales y Geología. Permite determinar e identificar distribuciones de fases; la estructura cristalográfica mediante difracción de electrones, medidas de tamaños y morfología y estudiar defectos cristalinos.

El equipo con que cuenta LabMET es el TEM con capacidades analíticas más avanzado en Chile, el que fue adquirido e instalado en la FCFM el año 2006 a través de la Red Nacional de Programas de Doctorado en Ciencia de los Materiales (UCH 0205) de la Universidad de Chile, Universidad de Santiago y Pontificia Universidad Católica de Chile, constituyendo una parte central del Programa de Mejoramiento de la Calidad y la Equidad de la Educación Superior (MECESUP). El equipo es un Tecnai G2 F20 S-TWIN, equipado con EDS, STEM y cámara CCD.

Equipos e instrumentos

Microscopio: Tecnai G2 F20 S-TWIN 2005, que puede operar entre 80 y 200 kV, marca FEI (actual Thermo Fisher), con filamento FEG, equipado con EDS, STEM y cámara CCD.

Equipos de preparación de muestras: Twin-Jet Electropolisher Stuers; Ultrasonic Disk Cutter; Dimpling Grinder y Ion Mill.

Académicos responsables del Departamento de Química, Biotecnología y Materiales

Proyectos asociados

Publicaciones indexadas ISI (últimos 10 años)

  1. T. Arun, T. K. Kumar, R. Udayabhaskar, and R. V Mangalaraja, A. Akbari-Fakhrabadi. Nano hexagonal Co3O4 platelets for supercapacitor applications. Materials Research Exp. 6: 0850b1 (2019) DOI: 10.1088/2053-1591/ab24e8
  2. S. Farhang-Sahlevani, T. Pandiyarajan, F. Sanhueza, A. Akbari-Fakhrabadi, H.D. Mansilla, D. Contreras, R.V. Mangalaraja, M.A. Gracia-Pinilla. A facile hydrothermal synthesis of CeO2 nanocubes decorated ZnO nanostructures: optical and enhanced photocatalytic properties. J. Mater. Sci. Mater. Electron. (2019). DOI: 10.1007/s10854-019-01521-8
  3. A. Thirumurugan, K. Prabakaran, R. Udayabhaskar, R.V. Mangalaraja, A. Akbari-Fakhrabadi. Carbon decorated octahedral shaped Fe3O4 and α-Fe2O3 magnetic hybrid nanomaterials for next generation supercapacitor applications. Applied Surface Science 485: 147-157 (2019). DOI: 10.1016/j.apsusc.2019.04.177.
  4. T. Jayaramudu, K. Varaprasad, R. D. Pyarasani, K. K. Reddy, K. D. Kumar, A. Akbari-Fakhrabadi, R.V. Mangalaraja, J. Amalraj. Chitosan capped copper oxide/copper nanoparticles encapsulated microbial resistant nanocomposite films. International Journal of Biological Macromolecules 128: 499-508 (2019). DOI: 10.1016/j.ijbiomac.2019.01.145.
  5. A. Akbari-Fakhrabadi, O. Rodriguez, R. Rojas, V. Meruane, M.H. Pishahang. Ferroelastic behavior of LaCoO⁠3: A comparison of impression and compression techniques. Journal of European Ceramic Society 39: 1569-1576 (2019). DOI: 10.1016/j.jeurceramsoc.2018.11.008
  6. R. Tamayo, R. Espinoza-González, F. Gracia, U. Pereira Rodrigues-Filho, M. Flores and E. Sacari. As(III) Removal from Aqueous Solution by Calcium Titanate Nanoparticles Prepared by the Sol Gel Method. Nanomaterials 9-5: 733 (2019). DOI: 10.3390/nano9050733
  7. H. Fernández, S. Ordoñez, H. Pesenti, R. Espinoza González, M. Leoni. Microstructure homogeneity of milled aluminum A356–Si3N4 metal matrix composite powders. Journal of Materials Research & Technology 8-3: 2969-2977 (2019). DOI: 10.1016/j.jmrt.2019.05.004
  8. F. Guzmán‑Olivos, R. Espinoza‑González, V. Fuenzalida and G. Morell. Field emission properties of carbon nanowalls prepared by RF magnetron sputtering. Applied Physics A 125: 354 (2019). DOI: 10.1007/s00339-019-2645-2
  9. D. Guzmán, C. Aguilar, P. Rojas, J. M. Criado, M.J. Diánez, R. Espinoza, A. Guzmán, C. Martínez. Production of Ag−ZnO powders by hot mechanochemical processing. Transactions of Nonferrous Metals Society of China 29: 365−373 (2019). DOI: 10.1016/S1003-6326(19)64946-0
  10. N. Bruna, B. Collao, A. Tello, P. Caravantes, N. Díaz-Silva, J.P. Monrás, N. Órdenes-Aenishanslins, M. Flores, R. Espinoza-Gonzalez, D. Bravo and J. M. Pérez-Donoso. Synthesis of salt-stable fluorescent nanoparticles (quantum dots) by polyextremophile halophilic bacteria. Scientific Reports 9: 1953 (2019). DOI: 10.1038/s41598-018-38330-8
  11. R. Dinamarca, R. Espinoza-González, C.H. Campos and G. Pecchi. Magnetic Fe2O3–SiO2–MeO2–Pt (Me = Ti, Sn, Ce) as Catalysts for the Selective Hydrogenation of Cinnamaldehyde. Effect of the Nature of the Metal Oxide. Materials 12: 413 (2019). DOI: 10.3390/ma12030413
  12. B. Ghosh, S.C. Ray, R. Espinoza-González, R. Villarroel, S.A. Hevia, P. Álvarez-Vega. Surface plasmon effect in electrodeposited diamond-like carbon films for photovoltaic application. Chemical Physics Letters 698: 60-66 (2018). DOI: 10.1016/j.cplett.2018.03.004
  13. M. Romero-Sáez, A.B. Dongil, N. Benito, R. Espinoza-González, N. Escalona, F. Gracia. CO2 methanation over nickel-ZrO2 catalyst supported on carbon nanotubes: A comparison between two impregnation strategies. Applied Catalysis B: Environmental 237: 817-825 (2018). DOI: 10.1016/j.apcatb.2018.06.045
  14. G. Ulloa, C.P. Quezada, M. Araneda, B. Escobar, E. Fuentes, S.A. Álvarez, M. Castro, N. Bruna, R. Espinoza-González, D. Bravo, J.M. Pérez-Donoso. Phosphate Favors the Biosynthesis of CdS Quantum Dots in Acidithiobacillus thiooxidans ATCC 19703 by Improving Metal Uptake and Tolerance. Frontiers in Microbiology 9: 234 (2018). DOI: 10.3389/fmicb.2018.00234
  15. A. Akbari-Fakhrabadi, E.G. Toledo, J.I. Canales, V. Meruane, S.H. Chan, M.A. Gracia-Pinilla. Effect of Sr2+ and Ba2+ doping on structural stability and mechanical properties of La2NiO4+δ. Ceramics International 44: 10551-10557 (2018). DOI: 10.1016/j.ceramint.2018.03.077
  16. J.P. Sanhueza, D. Rojas, O. Prat, J. García, R. Espinoza, C. Montalba, M.F. Melendrez. Precipitation kinetics in a 10.5%Cr heat resistant steel: Experimental results and simulation by TC-PRISMA/DICTRA. Materials Chemistry and Physics 200: 342-353 (2017). DOI: 10.1016/j.matchemphys.2017.07.083
  17. V. Salinas, C. Aguilar, R. Espinoza-González, F. Lund, N. Mujica. In situ monitoring of dislocation proliferation during plastic deformation using ultrasound. International Journal of Plasticity 97: 178-193 (2017). DOI: 10.1016/j.ijplas.2017.06.001
  18. B. Ghosh, R. Tamayo-Calderón, R. Espinoza-González, S. Hevia. Enhanced dielectric properties of PVDF/CaCu3Ti4O12:Ag composite films. Materials Chemistry and Physics 196: 302-309 (2017). DOI: 10.1016/j.matchemphys.2017.05.009
  19. E. Donoso, M.J. Dianez, J.M. Criado, R. Espinoza, E. Mosquera. Non-isothermal characterization of the precipitation hardening of a Cu-11Ni-19Zn-1Sn alloy. Metallurgical and Materials Transactions A 48A: 3090-3095 (2017).
  20. B. Ghosh, F. Guzmán-Olivos, R. Espinoza-González. Plasmon-enhanced optical absorption with graded bandgap in diamond-like carbon (DLC) films. Journal of Materials Science 52(1): 218-228 (2017). DOI: 10.1007/s10853-016-0324-7
  21. A. Akbari-Fakhrabadi, V. Meruane, M. Jamshidijam, M.A. Gracia, R. Garcia, M. Orellana. Structural and mechanical properties of La0.6Sr0.4M0.1Fe0.9O3-δ (M: Co, Ni and Cu) perovskites. Ceramic International 43: 2089-2094 (2017). DOI: 10.1016/j.ceramint.2016.10.185
  22. S. León-Ríos, R. Espinoza González, S. Fuentes, E. Chávez, A. Echeverría, A.E. Serrano, C.S. Demergasso, R.A. Zárate. One-Dimensional TiO2-B Crystals Synthesized by Hydrothermal Process and Their Antibacterial Behaviour on Escherichia coli. Journal of Nanomaterials 2016: 7213672 (2016).
  23. Guzmán-Olivos, Fernando; Espinoza-González, Rodrigo; Fuenzalida, Victor. Nanocrystalline carbon flakes deposited by RF magnetron sputtering. Materials Letters 167: 242-245 (2016).
  24. E. Donoso, M.J. Dianez, J.M. Criado, R. Espinoza, E. Mosquera. Influence of tin additions on the precipitation processes in a Cu-Ni-Zn alloys. Revista de Metalurgia 52(1) (2016).
  25. R. Saravanan, M.M. Khan, F. Gracia, J. Qin, V.K. Gupta, A. Stephen. Ce3+-ion-induced visible-light photocatalytic degradation and electrochemical activity of ZnO/CeO2 nanocomposite. Scientific Reports 6: 31641 (2016).
  26. R. Saravanan, E. Sacari, F. Gracia, M.M. Khan, E. Mosquera, V.K. Gupta. Conducting PANI simulated ZnO system for visible light photocatalytic degradation of coloured dyes. J. Molecular Liquids 221: 1029-1033 (2016).
  27. A. Akbari-Fakhrabadi, , P. Sathishkumar, K. Ramam, R. Palma, R.V. Mangalaraja. Low frequency ultrasound assisted synthesis of La0.6Sr0.4Co0.2Fe0.8O3 − δ (LSCF) perovskite nanostructures. Powder Technology 276: 200-203 (2015). DOI: 10.1016/j.powtec.2015.02.043
  28. Barra, Felipe; Espinoza-Gonzalez, Rodrigo; Fernandez, Henry; Lund, Fernando; Maruel, Agnes; Pagneux, Vincet. The Use of Ultrasound to Measure Dislocation Density. JOM 67(8): 1856-1863 (2015).
  29. Morel, M.; Mosquera, E. Diaz-Droguett, D.E.; Carvajal, N.; Roble, M.; Rojas, V.; Espinoza-Gonzalez, R. Mineral magnetite as precursor in the synthesis of multi-walled carbon nanotubes and their capabilities of hydrogen adsorption. International Journal of Hydrogen Energy Volume 40(45): 15540-15548 (2015).
  30. R. Espinoza-González, E. Mosquera, I. Moglia, R. Villarroel, V.M. Fuenzalida. Hydrothermal growth and characterization of zirconia nanostructures on non-stoichiometric zirconium oxide. Ceramics International 40-10: 15577-15584 (2014). DOI: 10.1016/j.ceramint.2014.07.034
  31. E. Mosquera, D.E. Diaz-Droguett, N. Carvajal, M. Roble, M. Morel, R. Espinoza. Characterization and hydrogen storage in multi-walled carbon nanotubes grown by aerosol-assisted CVD method. Diamond and Related Materials 43: 66-71 (2014). DOI: 10.1016/j.diamond.2014.01.016
  32. M. Manotas-Albor, A. Vargas-Uscategui, R. Palma, E. Mosquera. In situ production of tantalum carbide nanodispersoids in a copper matrix by reactive milling and hot extrusion. J. of Alloys and Compounds 598: 126-132 (2014). DOI: 10.1016/j.jallcom.2014.01.191
  33. E. Mosquera, N. Carvajal. Low temperature synthesis and blue photoluminescence of ZnS submicronparticles. Materials Letters 129: 8-11 (2014). DOI: 10.1016/j.matlet.2014.05.037
  34. E. Mosquera, I. del Pozo, M. Morel. Structure and red shift of optical band gap in CdO-ZnO nanocomposite synthesized by the sol gel method. Journal of Solid State Chemistry 206: 265-271 (2014)
  35. A. Vargas-Uscategui, E. Mosquera, L. Cifuentes. Transmission electron microscopy study of electrodeposited rhenium and rhenium oxides. Materials Letters 94: 44-46 (2013).
  36. E. Mosquera, J. Bernal, R.A. Zarate, F. Mendoza, R.S. Katiyar and G. Morell. Growth and electron field-emission of single crystalline ZnO nanowires. Materials Letters 93: 326-329 (2013).
  37. A. Vargas-Uscategui, E. Mosquera, L. Cifuentes. Analysis of the electrodeposition process of rhenium and rhenium oxides in alkaline aqueous electrolyte. Electrochemica Acta 109: 283-290 (2013).
  38. N. Mujica, M.T. Cerda, R. Espinoza, J. Lisoni, F. Lund. Ultrasound as a probe of dislocation density in aluminum. Acta Materialia 60: 5828–5837 (2012).
  39. E. Donoso; R. Espinoza; M. J. Diánez; J.M.Criado. Microcalorimetric study of the annealing hardening mechanism of a Cu–2.8Ni–1.4Si (at%) alloy. Materials Science & Engineering A 556: 612-616 (2012).
  40. D.E. Diaz-Droguett, A. Zuñiga, G. Solorzano, et al. Electron beam-induced structural transformations of MoO3 and MoO3-x crystalline nanostructures. Journal of Nanoparticles Research 14: 679 (2012).
  41. E. Mosquera, J. Bernal, M. Morel, R.A. Zarate. Structural and Optical Studies of Zinc Oxide Nanowires Grown Directly on Zinc Foil Substrate by Thermal Evaporation Method. J. of Nanoengineering and Nanomanufacturing 2(3): 253-258 (2012).
  42. S. Fuentes, R.A. Zarate, R. Espinoza. Characterization of hydrated titanium oxide with sheet-like and tube-like structures prepared by a hydrothermal processing. Journal of the Chilean Chemical Society 56: 729-733 (2011).
  43. R.A. Espinoza-González, D.E. Diaz-Droguett, J.I. Ávila, C.A. González-Fuentes, V.M. Fuenzalida. Hydrothermal growth of zirconia nanobars on zirconium oxide. Materials Letters 65: 2121-2123 (2011).
  44. D.E. Díaz-Droguet; R. Espinoza and V.M. Fuenzalida. Copper nanoparticles grown under hydrogen: study of the surface oxide. Applied Surface Science 257(10): 4597-4602 (2011).
  45. H. Palza, J. Vera, M. Wilhelm, et al. Spherulite Growth Rate in Polypropylene/Silica Nanoparticle Composites: Effect of Particle Morphology and Compatibilizer. Macromolecular materials and engineering 296-8: 744-751 (2011)
  46. H. Palza, R. Vergara, P. Zapata. Composites of polypropylene melt blended with synthesized silica nanoparticles. Composites Sience and Technology 71(4): 535-540 (2011).
  47. V.M. Fuenzalida, D.G. Galvez-Arancibia, I.J. Olavarria-Contreras, et al. Tungsten oxide nanoparticles grown by condensation in gas using domestic appliances. Materials Letters 65: 3061-3063 (2011).
  48. D.E. Diaz-Droguett, V.M. Fuenzalida. Gas effects on the chemical and structural characteristics of porous MoO3 and MoO3-x grown by vapor condensation in helium and hydrogen. Materials Chemistry and Physics 126: 82-90 (2011).
  49. S. Fuentes; R.A. Zárate; E. Chávez; P. Muñoz; M. Ayala; R. Espinoza-González; and P. Leyton. Synthesis and characterization of BaTiO3 nanoparticles in oxygen atmosphere. Journal of Alloys and Compounds 505(2): 568-572 (2010).
  50. H. Palza, R. Vergara, P. Zapata. Improving the Thermal Behavior of Poly(propylene) by Addition of Spherical Silica Nanoparticles. Macromolecular Materials and Engineering 295-10: 899-905 (2010).
  51. C. Covarrubias, F. Gracia, H: Palza. Catalytic degradation of polyethylene using nanosized ZSM-2 zeolite. Applied Catalysis A: General 384: 186-191 (2010).
  52. M. Reich, S.L. Chryssoulis, A. Deditius, Artur, et al. Invisible" silver and gold in supergene digenite (Cu1.8S). Geochimica et Cosmochimica Acta 74(21): 6157-6173 (2010).
  53. D.E. Diaz-Droguett, V.M. Fuenzalida. One-Step Synthesis of MoO3 and MoO(3-x) Nanostructures by Condensation in Gas: Effect of the Carrier Gas. Journal of Nanoscience and Nanotechnology 10(10): 6694-6706 (2010).