Publicaciones 2011-2020

@article{RN418,
title = {A preliminary FTIR-ATRand XRFanalyses of the cellulose of four postcards from the Reichskommissariat Ostland and theGerman occupations of Pleskau (Russia) and Latvia},
author = {J.S. Gomez-Jeria and Sebastian Gutierrez and Guadalupe Pizarro},
url = {http://chemrj.org/download/vol-4-iss-3-2019/chemrj-2019-04-03-48-57.pdf},
issn = {2455-8990},
year = {2019},
date = {2019-01-01},
journal = {Chemistry Research Journal},
volume = {4},
pages = {48-57},
publisher = {Leon Publications},
abstract = {FTIR-ATR and XRF techniques have been employed to carry out a preliminary characterization of the cellulose of four postcards issued during the Third Reich war in the East. Two postcards were printed in Berlin while the other two corresponded to communist Russian postcards with German overprints. The XRF results show that only the paper of the German postcards contains potassium. The four postcards present Fe and Cu that could oxidize cellulose. The possible presence of cotton is suggested but not proved.},
keywords = {cellulose, FTIR-ATR, German occupation of Latvia, German occupation of Russia, infrared spectroscopy, Latvia, philately, Pleskau, Postcards, raman, Reichskommissariat Ostland, Russia, Third Reich, X-Ray fluorescence, xrf},
pubstate = {published},
tppubtype = {article}
}

@article{RN1014,
title = {A preliminary FTIR-ATRand XRFanalyses of the cellulose of four postcards from the Reichskommissariat Ostland and theGerman occupations of Pleskau (Russia) and Latvia},
author = {J.S. Gomez-Jeria and S. Gutierrez and G. Pizarro},
url = {http://chemrj.org/download/vol-4-iss-3-2019/chemrj-2019-04-03-48-57.pdf},
issn = {2455-8990},
year = {2019},
date = {2019-01-01},
journal = {Chemistry Research Journal},
volume = {4},
pages = {48-57},
publisher = {Leon Publications},
abstract = {FTIR-ATR and XRF techniques have been employed to carry out a preliminary characterization of the cellulose of four postcards issued during the Third Reich war in the East. Two postcards were printed in Berlin while the other two corresponded to communist Russian postcards with German overprints. The XRF results show that only the paper of the German postcards contains potassium. The four postcards present Fe and Cu that could oxidize cellulose. The possible presence of cotton is suggested but not proved.},
keywords = {cellulose, FTIR-ATR, German occupation of Latvia, German occupation of Russia, infrared spectroscopy, Latvia, philately, Pleskau, Postcards, raman, Reichskommissariat Ostland, Russia, Third Reich, X-Ray fluorescence, xrf},
pubstate = {published},
tppubtype = {article}
}

@article{RN378,
title = {Raman of Indigo on a Silver Surface. Raman and Theoretical Characterization of Indigo Deposited on Silicon Dioxide-Coated and Uncoated Silver Nanoparticles},
author = { G. Corales and F. Celis and J.S. Gomez-Jeria and M. Campos-Vallette and J.J. Carcamo},
url = {/brokenurl#<Go to ISI>://WOS:000404931300004},
doi = {10.1080/00387010.2017.1324493},
issn = {0038-7010},
year = {2017},
date = {2017-01-01},
journal = {Spectroscopy Letters},
volume = {50},
number = {6},
pages = {316-321},
abstract = {Raman, surface-enhanced Raman scattering, and shell isolated nanoparticles-enhanced Raman scattering techniques were used to study the indigo-nanoparticle interaction nature. Silver nanoparticles were employed with and without a silicon dioxide spacer inert layer. The SERS spectral profile, obtained using silver nanoparticles, is different from the Raman one, which led to the proposition that the indigo-silver interaction is in the range of intermolecular interactions. SERS spectral reproducibility suggests identical organization and orientation of the analyte on the metal surface. The shell isolated nanoparticles enhanced Raman scattering spectrum of indigo, obtained by using silicon dioxide coated silver nanoparticles resulted similar to its Raman spectrum. This result indicates that the indigo structure is chemically unmodified by the silicon dioxide-coated silver surface. From the shell-isolated nanoparticles-enhanced Raman scattering experiments, the electromagnetic mechanism is proposed as the reason for the spectral enhancement. Theoretical calculations allow one to infer both the indigo-silver surface interaction nature and the orientation of indigo on the surface.},
keywords = {analysis, approximations, dioxide-coated fluorescence, identification, indigo, molecular-orbital nanoparticles, raman, scattering, sers sers, shiners, silicon silver spectroscopic theories},
pubstate = {published},
tppubtype = {article}
}

@article{RN261,
title = {Raman and Surface Enhanced Raman Signals of the Sensor 1-(4-Mercaptophenyl)-2,4,6-Triphenylpyridinium Perchlorate},
author = { F. Celis and M. Campos-Vallette and J.C. Vega and J.S. Gomez-Jeria and C. Aliaga},
url = {/brokenurl#<Go to ISI>://WOS:000361545700018},
doi = {10.4067/S0717-97072015000200018},
issn = {0717-9707},
year = {2015},
date = {2015-01-01},
journal = {Journal of the Chilean Chemical Society},
volume = {60},
number = {2},
pages = {2944-2948},
abstract = {The sensor 1-(4-mercaptophenyl)-2,4,6-triphenylpyridinium perchlorate compound was vibrationally characterized using Raman and the Surface-Enhanced Raman techniques, SERS and Shell-Isolated Nanoparticles-Enhanced Raman Spectroscopy (SHINERS). The Raman spectrum was analyzed and the band assignment was supported using DFT data at the B3LYP/6-31G(d) level. SERS data allowed infer about the orientation of the analyte on the naked Ag surface. EHT calculations for an Ag/analyte model represent well the SERS spectrum supporting the Ag-S bond formation. The SHINERS spectrum was obtained by using Ag
@SiO2 nanoparticles prepared at two different time of the SiO2 coating process. The most intense SHINERS spectral signals of the compound (100 nM) were obtained after 20 minutes of the Ag
@SiO2 formation. No charge-transfer was concluded from the SHINERS experiments.},
keywords = {density dft dyes, dynamics, eht halochromism, hydrocarbons, perchlorate, raman, scattering, sers, shiners, silver, solvent spectroscopy},
pubstate = {published},
tppubtype = {article}
}

@article{RN212,
title = {A Vibrational Approach for the Study of Historical Weighted and Dyed Silks},
author = { T. Aguayo and M.C. Araya and T.M. Icaza and M. Campos-Vallette},
url = {/brokenurl#<Go to ISI>://WOS:000342254500056},
doi = {10.1016/j.molstruc.2014.07.016},
issn = {0022-2860},
year = {2014},
date = {2014-01-01},
journal = {Journal of Molecular Structure},
volume = {1075},
pages = {471-478},
publisher = {2014 Elsevier B.V.},
abstract = {Samples from six different historic silk objects were studied with the Raman and ATR-IR vibrational techniques. A set of degummed and weighted silks was prepared in order to recognize the vibrational signature associated with the processes used. The spectral information allowed the identification of the weighting process and the dyes used in some of the cases. The different spectra also allowed infer about the deterioration observed in the samples. The silk fibroin displays slight conformational modifications by the weighting process. The degumming process seems to have no chemical effect on the fibroin stability.},
keywords = {atr, bombyx bombyx-mori, conformation, conservation, degradation, deterioration, enhanced infrared-spectroscopy, inks, mori, proteins, raman, raman-scattering, silk, textiles weighted},
pubstate = {published},
tppubtype = {article}
}

@article{carcamo2012raman,
title = {Raman Study of the Shockwave Effect on Collagens},
author = { J.J. Carcamo and A.E. Aliaga and E. Clavijo and M. Branes and M. Campos-Vallette},
url = {/brokenurl#<Go to ISI>://WOS:000300515500052},
doi = {10.1016/j.saa.2011.10.049},
issn = {1386-1425},
year = {2012},
date = {2012-01-01},
journal = {Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy},
volume = {86},
pages = {360-365},
publisher = {2011 Elsevier B.V.},
abstract = {The Raman spectra (1800-200 cm(-1)) of isolated dried collagen types land ill were recorded at different times after shockwave (SW) application in aqueous media. SWs were applied in a single session. One week after the SW application the vibrational data analysis indicates changes in the conformation of the collagens; orientational changes are also inferred. During the next three weeks collagens tended to recover the conformation and orientation existing before SW application.},
keywords = {amino-acids, collagens, conformation, dependence, infrared-spectra, raman, scattering, shockwaves, spectroscopy, time tissues},
pubstate = {published},
tppubtype = {article}
}

@article{RN39i,
title = {Raman and Surface-Enhanced Raman Scattering in the Study of Human Rotator Cuff Tissues after Shock Wave Treatment},
author = { J.J. Carcamo and A.E. Aliaga and E. Clavijo and M. Branes and M. Campos-Vallette},
url = {/brokenurl#<Go to ISI>://WOS:000300836900011},
doi = {10.1002/jrs.3019},
issn = {0377-0486},
year = {2012},
date = {2012-01-01},
journal = {Journal of Raman Spectroscopy},
volume = {43},
number = {2},
pages = {248-254},
publisher = {2011 John Wiley & Sons, Ltd.},
abstract = {Important improvements of diseases of the rotator cuff supraspinatus tendons are seen after shock wave (SW) treatment. Neo-angiogenesis stimulation and hypercellularization result from short periods of treatment. The present work is an attempt to provide a first approach to these bioprocesses, most likely associated with structural aspects resulting from biochemical changes brought about by the SW. Immunohistochemical data indicate that collagen areas in the tissues are influenced the most by the SW. Presence of additional collagens I and III by the SW treatment is inferred from an observed increase of the tissue's tinctorial properties. The tools selected for our studies are Raman spectroscopy and the ultrasensitive surface-enhanced Raman scattering (SERS). Here we extract information from 1016 SERS spectra of 52 biopsies of human tendon tissues on Ag nanoparticles before and after the SW treatment. The spectral information is analyzed on the basis of Raman and SERS data of collagen types I and III and their most abundant amino acid components. SERS spectra of tissues reveal the presence of characteristic modes related mainly to amino acids. It has been found that the main differences between both tissue samples could be correlated with the structural conformational aspects of collagen.},
keywords = {amino-acids, collagen, collagens, cuff, gold infrared-spectra, nanoparticles, raman, rotator sers, shockwaves, silver, single-molecule, spectroscopy},
pubstate = {published},
tppubtype = {article}
}

@article{RN41f,
title = {Raman, Infrared, Sers and Theoretical Study of 3-(1-Phenylpropan-2-Ylamino) Propanenitrile, Fenproporex},
author = { G. Diaz-Fleming and F. Celis and M. Campos-Vallette and A.E. Aliaga and M. Escobar and R. Koch},
url = {/brokenurl#<Go to ISI>://WOS:000293001000003},
doi = {10.1002/jrs.2882},
issn = {0377-0486},
year = {2011},
date = {2011-01-01},
journal = {Journal of Raman Spectroscopy},
volume = {42},
number = {7},
pages = {1497-1504},
publisher = {2011 John Wiley & Sons, Ltd.},
abstract = {Infrared, Raman and surface-enhanced Raman scattering (SERS) spectra of 3-(1-phenylpropan-2-ylamino) propanenitrile (fenproporex) have been recorded. Density functional theory (DFT) with the B3LYP functional was used for optimizations of ground state geometries and simulation of Raman and SERS vibrational spectra of this molecule. Bands of the vibrational spectra were assigned in detail. The comparison of SERS spectra obtained by using colloidal silver and gold nanoparticles with the corresponding Raman spectrum reveals enhancement and shifts in bands, suggesting a possible partial charge-transfer mechanism in the SERS effect. Information about the orientation of fenproporex on the nanometer-sized metal structures is also obtained.},
keywords = {calculations, density-functional dft elements, fenproporex, gold, infrared, raman, scattering, sers, silver, spectroscopy, surface-enhanced temperature theory},
pubstate = {published},
tppubtype = {article}
}