Publicaciones 2011-2020

@article{marcaida2017optimization,
title = {Optimization of Sample Treatment for the Identification of Anthraquinone Dyes by Surface-Enhanced Raman Spectroscopy},
author = { I. Marcaida and M. Maguregui and H. Morillas and C. Garcia-Florentino and V. Pintus and T. Aguayo and M. Campos-Vallette and J. Madariaga},
url = {/brokenurl#<Go to ISI>://WOS:000395057500024},
doi = {10.1007/s00216-016-0169-6},
issn = {1618-2642},
year = {2017},
date = {2017-01-01},
journal = {Analytical and Bioanalytical Chemistry},
volume = {409},
number = {8},
pages = {2221-2228},
abstract = {The study and characterization of old artifacts such as pigments requires the use of techniques that need a small amount of sample to perform the analysis because of the high value of these samples. In recent years, organic molecules such as anthraquinone dyes have been identified by surface-enhanced Raman spectroscopy (SERS). However, different sample treatments must be applied to isolate the organic dye from the mordant, which produces great fluorescence in the Raman measurements. In this work, optimization of sample treatment for the SERS analysis of anthraquinone dyes was performed. Sample mass, the organic solvent, and its volume were optimized and different slide materials and excitation lasers were compared to choose the best conditions for the identification of the dyes. The optimization of sample treatment resulted in 5 mg of sample as the optimum amount. Further, two consecutive extractions with 0.5 mL of ethyl acetate was the best option for the extraction of the dye. A quartz slide was used instead of a glass slide to reduce background signal, and an excitation laser of 532 nm offers better results than one of 785 nm. The optimized method was applied to the characterization of the dyes used in Pompeian pink and purple lake pigments. Alizarin and purpurin anthraquinone dyes, obtained from madder lake, were identified as the organic colorants. The SERS results were confirmed by those obtained by means of UV-visible spectroscopy.},
keywords = {anthraquinone, dyestuffs, extraction, lake lake, liquid-liquid madder nanoparticles, pigment, pigments, purple, raman scattering, sers, silver, spectroscopy, surface-enhanced},
pubstate = {published},
tppubtype = {article}
}

@article{RN323,
title = {Surface-Enhanced Raman Scattering Activity of Negatively Charged Bio-Analytes from a Modified Silver Colloid},
author = { C. Garrido and B. Weiss-Lopez and M. Campos-Vallette},
url = {/brokenurl#<Go to ISI>://WOS:000364784800003},
doi = {10.1080/00387010.2015.1046606},
issn = {0038-7010},
year = {2016},
date = {2016-01-01},
journal = {Spectroscopy Letters},
volume = {49},
number = {1},
pages = {11-18},
abstract = {A modification to the traditional synthesis of reduced silver metal nanoparticles with hydroxylamine hydrochloride is proposed. The new colloid, obtained by decreasing the concentration of hydroxide and chloride ions, is stable in a large pH range. The low negative surface charge density of the nanoparticles allowed to obtain surface-enhanced Raman scattering (SERS) spectral activity of bio-analytes containing negatively charged groups in aqueous solution. The new colloidal system, characterized by electronic spectroscopy, atomic force microscopy, and zeta potential measurements, was used in the SERS study of the bio-analytes aspartic acid, four oligopeptides, one polypeptide and a probe, the organic dye fluorescein.},
keywords = {bio-analytes, charged colloidal fluorescein, nanoparticles, negatively peptides, raman reduction scattering, sers, silver spectroscopy, surface, surface-enhanced},
pubstate = {published},
tppubtype = {article}
}