Browsing by Author "5053a44f-2eda-4358-9325-e150ce4aef2f"

Now showing items 1-12 of 12

    • Archaeometric analysis of ceramic production in Tiwanaku state (c.500-1000ce): An exploratory study 
      Ogalde, J. P.; Korpisaari, A.; Riera Soto, C.; Arriaza, B.; Paipa, C.; Leyton, P.; Campos Vallette, M.; Lara, N.; Chacama, J. (Wiley, 2020)
      The chemical and mineralogical characterization of seven ceramic fragments produced within Tiwanaku state (c.500-1000 ce) is reported. The instrumental techniques used included X-ray elemental and mineralogical chemical ...
    • Detection of PAHs on calixarene-functionalized metal surfaces by means of SERS spectroscopy Detección de ... 
      García Ramos, J. V.; Sánchez-Cortés, S.; Leyton, P.; Campos Vallette, Marcelo (2007)
      Polycyclic Aromatic Hydrocarbons (PAHs) were detected at trace concentrations. In order to accomplish that, new SERS substrates were developed based on silver nanoparticles, both in suspension and immobilized in glass. ...
    • Fluorescence and surface-enhanced vibrational spectroscopies of lawsone and plumbagin 
      Aliaga, A. E.; Leyton, P.; Clavijo Campos, Ernesto; Campos Vallette, Marcelo (Taylor and Francis Inc., 2016)
      © 2016, Copyright © Taylor & Francis Group, LLC. The natural dyes lawsone and plumbagin (1,4-naphthoquinones) were studied by using fluorescence, Raman, infrared (IR), surface-enhanced Raman scattering (SERS), and ...
    • Importance of metal-adsorbate interactions for the surface-enhanced raman scattering of molecules adsorbed ... 
      Guerrini, L.; Jurasekova, Z.; Domingo, C.; Pérez-Méndez, M.; Leyton, P.; Campos Vallette, Marcelo; Garcia-Ramos, J. V.; Sanchez-Cortes, S. (2007)
      The interaction between adsorbates of different nature and plasmonic nanoparticles is reviewed here on the basis of the work done in our laboratory in the past few years. The paper is structured for analyzing the interaction ...
    • Influence of TiO 2 on prebiotic thermal synthesis of the Gly-Gln polymer 
      Leyton, P.; Saladino, R.; Crestini, C.; Campos Vallette, Marcelo; Paipa, C.; Berríos, A.; Fuentes, S.; Zárate, R. A. (2012)
      The role of the titanium dioxide (rutile and anatase) with and without room light on the thermal synthesis of the glycine-l-glutamine (Gly-Gln) polymer is described. The efficiency in percentage of polymerization with room ...
    • Preparation of SrTiO3 nanomaterial by a sol–gel-hydrothermal method 
      Fuentes, S.; Zárate Aliaga, Ramón; Chávez, Edgar; Muñoz, P.; Díaz Droguett, Donovan Enrique; Leyton, P. (Springer, 2010)
      A new synthetic route to obtain high-purity strontium titanate, SrTiO3, using the sol–gel-hydrothermal reaction of TiCl4 and a SrCl2 solution in an oxygen atmosphere has been developed. In the synthesized products the ...
    • SERS spectrum of red dyes in the Mapuche belts from the beginning of the XXth century 
      Campos Vallette, Marcelo; Rodríguez, M. J.; Chapanoff, M. A.; Clavijo Campos, Ernesto; Gómez Jeria, Juan; Aliaga, A. E.; Jara, G. P.; Celis, F.; Paipa, C.; Leyton, P. (Wiley, 2017)
      Red dyes in seven belts (trariwe) belonging to the Mapuche culture, dated as beginning of the XXth century and stored in Museo Regional de la Araucania, Chile, were studied by using ultraviolet-visible, liquid chromatography ...
    • Surface enhanced Raman scattering study of l-lysine 
      Aliaga, A. E.; Osorio Román, Igor; Garrido, C.; Leyton, P.; Cárcamo Vega, José; Clavijo Campos, Ernesto; Gómez Jeria, Juan; Díaz Fleming, Guillermo; Campos Vallette, Marcelo (2009)
      Different SERS spectra of lysine (Lys) in Ag colloidal surface were obtained. No identical SERS spectra of Lys were observed after a stabilization period, suggesting that a unique conformation and orientation on the metal ...
    • Surface-enhanced micro-raman detection and characterization of calix[4]arene-polycyclic aromatic hydrocarbon ... 
      Leyton, P.; Sánchez Cortés, S.; Campos Vallette, Marcelo; Domingo, C.; Garcia-Ramos, J. V.; Saitz, C. (2005)
      Surface-enhanced micro-Raman spectroscopy (micro-SERS) was used to detect traces of the hazardous pollutant polycyclic aromatic hydrocarbons (PAHs) pyrene and benzo[c]phenanthrene deposited onto a calix[4]arene-functionalized ...
    • Surface-enhanced Raman scattering and theoretical studies of the C-terminal peptide of the β-subunit human ... 
      Aliaga, A. E.; Aguayo, T.; Garrido, C.; Clavijo Campos, Ernesto; Hevia, E.; Gómez Jeria, Juan; Leyton, P.; Campos Vallette, Marcelo; Sánchez Cortés, S. (2011)
      Raman and surface-enhanced Raman scattering (SERS) spectra of the synthetic carboxy terminal peptide of human chorionic gonadatropin β-subunit free of carbohydrate moieties (P37) are reported. The spectral analysis is ...
    • Surface-enhanced Raman scattering study of L-tryptophan 
      Aliaga, A. E.; Osorio Román, Igor; Leyton, P.; Garrido, C.; Cárcamo, J.; Caniulef, C.; Célis, F.; Díaz Fleming, Guillermo; Clavijo Campos, Ernesto; Gómez Jeria, Juan; Campos Vallette, Marcelo (2009)
      Surface-enhanced Raman scattering (SERS) spectra of tryptophan (Trp) were obtained. A unique SERS spectrum of Trp, corresponding to the most stable conformation and orientation on the metal surface, is observed after a ...
    • Toxic Pigment in a Capacocha Burial: Instrumental Identification of Cinnabar in Inca Human Remains from ... 
      Arriaza, B.; Ogalde, J. P.; Campos M., Mónica; Paipa, C.; Leyton, P.; Lara, N. (Blackwell Publishing Ltd, 2018)
      © 2018 University of Oxford We report on the analysis of a red pigment found in a lavish Inca burial from Cerro Esmeralda, Chile, associated with the human sacrifice of two young girls. The outcome shows that the red pigment ...