Listar Investigación y Desarrollo por autor "Celis, Freddy"
Mostrando ítems 1-3 de 3
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Article
A simple method to estimate the mean number of lipophilic molecules on nanoparticle surfaces by fluorescence measurements (2021)
Adura, Carolina; Aliaga, Carolina; Silva, Francisco; Vera, Cristian; Pino, Eduardo; Celis, Freddy; Aracena, Andrés; Tirapegui, Cristian (NLM (Medline), 2021-05-14)Measurements of fluorescence intensity of the hydrophobic pyridinium salt (DTPSH) remaining in the organic phase after partition experiments in the DCM/H2O system allowed an approximate method to be developed to estimate ... -
Article
Identification of coexisting indigo species in an ancient green thread using direct plasmon-enhanced Raman spectroscopy (2020)
Celis, Freddy; Tirapegui, Cristian; García, Macarena; Aracena, Andrés; Aliaga, Álvaro. E.; Campos-Vallette, Marcelo (Sociedad Chilena de Quimica, 2020-06-30)A green ancient thread sample from a Chilean mummy turban was analyzed by plasmon-enhanced Raman scattering spectroscopy using a direct drop-colloidal method. The enhanced-Raman signals in the sample are associated with ... -
Article
Structural, morphological and magnetic properties of iron oxide thin films obtained by atomic layer deposition as a function of their thickness (2021)
Márquez, Paulina; Alburquenque, Daniela; Celis, Freddy; Melo Freire, Rafael; Escrig, Juan (Elsevier B.V., 2021-07-15)Hematite (α-Fe2O3) thin films with different thicknesses between 4 and 16 nm were synthesized by atomic layer deposition, employing 500 to 2000 cycles of FeCp2/O3. After a thermal reduction process, under a controlled ...