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Your search keyword '"Heredia‐Guerrero, José Alejandro"' showing total 36 results
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36 results on '"Heredia‐Guerrero, José Alejandro"'

4. Micro‐ and Nano‐Structured Bacteria Growth Media for Planar Bio‐Photonics

Author

Caligiuri, Vincenzo, primary, Leone, Francesca, additional, Favale, Olga, additional, De Santo, Maria, additional, Bruno, Mauro Daniel Luigi, additional, Mileti, Olga, additional, Pane, Alfredo, additional, Patra, Aniket, additional, Petti, Lucia, additional, Guzman‐Puyol, Susana, additional, Heredia‐Guerrero, José Alejandro, additional, Krahne, Roman, additional, Baldino, Noemi, additional, Bartolino, Roberto, additional, Galluccio, Michele, additional, Annesi, Ferdinanda, additional, and De Luca, Antonio, additional

Published
2023
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6. Micro‐ and Nano‐Structured Bacteria Growth Media for Planar Bio‐Photonics.

Author

Caligiuri, Vincenzo, Leone, Francesca, Favale, Olga, De Santo, Maria, Bruno, Mauro Daniel Luigi, Mileti, Olga, Pane, Alfredo, Patra, Aniket, Petti, Lucia, Guzman‐Puyol, Susana, Heredia‐Guerrero, José Alejandro, Krahne, Roman, Baldino, Noemi, Bartolino, Roberto, Galluccio, Michele, Annesi, Ferdinanda, and De Luca, Antonio

Subjects
PHOTONIC crystals, BIOMATERIALS, BACTERIAL growth, QUASICRYSTALS, BACTERIA, QUANTUM optics
Abstract

Bio‐inspired and biodegradable quantum optics scenarios constitute a pathway toward environmentally friendly front‐end technologies. Such an inspiring perspective necessitates the replacement of classic gain materials with a biological counterpart like photoluminescent bacteria. It is easy to imagine that, in this case, a planar and cell‐viable substitute of classic bulk solid‐states resonators can be highly beneficial. In this paper a micro‐ and nano‐photonic structuration of both a standard and a functionalized version of a typical bacterial growth medium (Luria‐Bertani Agar – LBA) is successfully realized. Three structures belonging to the categories of photonic crystals are replicated, such as quasi‐crystals and meta‐surfaces, demonstrating how the proposed media can be used as templates for high‐end photonic applications. The optical quality of the replicated structures is confirmed by far‐field diffraction measurements. The structured growth media allow for a broad control of the surface wettability by accessing a so‐called Wenzel state, in which the original hydrophilicity of a material is increased due to the photonic structuration. Finally, the suitability of the nano‐structured LBA as a plasmonic platform is evidenced. The proposed micro‐and nano‐structured photonic growth media constitute the first, fundamental step toward quantum optical frameworks from biological media. [ABSTRACT FROM AUTHOR]

Published
2024
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10. Zinc Polyaleuritate Ionomer Coatings as a Sustainable, Alternative Technology for Bisphenol A-Free Metal Packaging

Author

Morselli, Davide, primary, Cataldi, Pietro, additional, Paul, Uttam Chandra, additional, Ceseracciu, Luca, additional, Benitez, Jose Jesus, additional, Scarpellini, Alice, additional, Guzman-Puyol, Susana, additional, Heredia, Antonio, additional, Valentini, Paola, additional, Pompa, Pier Paolo, additional, Marrero-López, David, additional, Athanassiou, Athanassia, additional, and Heredia-Guerrero, José Alejandro, additional

Published
2021
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13. Biodegradable and Insoluble Cellulose Photonic Crystals and Metasurfaces

Author

Caligiuri, Vincenzo, primary, Tedeschi, Giacomo, additional, Palei, Milan, additional, Miscuglio, Mario, additional, Martin-Garcia, Beatriz, additional, Guzman-Puyol, Susana, additional, Hedayati, Mehdi Keshavarz, additional, Kristensen, Anders, additional, Athanassiou, Athanassia, additional, Cingolani, Roberto, additional, Sorger, Volker J., additional, Salerno, Marco, additional, Bonaccorso, Francesco, additional, Krahne, Roman, additional, and Heredia-Guerrero, José Alejandro, additional

Published
2020
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15. Biodegradable and Insoluble Cellulose Photonic Crystals and Metasurfaces.

Author

Caligiuri, Vincenzo, Tedeschi, Giacomo, Palei, Milan, Miscuglio, Mario, Martin-Garcia, Beatriz, Guzman-Puyol, Susana, Hedayati, Mehdi Keshavarz, Kristensen, Anders, Athanassiou, Athanassia, Cingolani, Roberto, Sorger, Volker J., Salerno, Marco, Bonaccorso, Francesco, Krahne, Roman, and Heredia-Guerrero, José Alejandro

Published
2021
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27. Transparent and flexible amorphous cellulose-acrylic hybrids

Author

Tran, Thi Nga, primary, Paul, Uttam, additional, Heredia-Guerrero, José Alejandro, additional, Liakos, Ioannis, additional, Marras, Sergio, additional, Scarpellini, Alice, additional, Ayadi, Farouk, additional, Athanassiou, Athanassia, additional, and Bayer, Ilker S., additional

Published
2016
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33. Insolubilization and thermal stabilization of a long-chain polyester by noncatalyzed melt-polycondensation synthesis in air.

Author

Benítez, José Jesús, Heredia‐Guerrero, José Alejandro, Cruz‐Carrillo, Miguel Antonio, Barthel, Markus Joachim, Knicker, Heike Elisabeth, and Heredia, Antonio

Subjects
THERMAL stability, POLYCONDENSATION, PALMITIC acid, POLYESTERS, NUCLEAR magnetic resonance, INFRARED spectroscopy, ALUMINUM foil
Abstract

ABSTRACT Self-standing films of poly(ω-hydroxyl hexadecanoic acid) [poly(ω-OHC16)] have been prepared by noncatalyzed melt-polycondensation in air at 150, 175, and 200 °C. Poly(ω-OHC16)s obtained are characterized as polyesters by infrared spectroscopy (FT-IR) and solid state magic angle spinning 13C nuclear magnetic resonance (13C MAS-NMR). Structurally, poly(ω-OHC16)s are quite crystalline as revealed by wide angle X-ray diffraction (WAXD). The presence of oxygen in the reaction atmosphere causes a mild oxidation in the form of peroxyester species, tentatively at the interphase between poly(ω-OHC16) crystallites, and the structure amorphization. The interfacial peroxyester phase ends up in the encapsulation of the polyester grains and provides a barrier towards the action of solvents. Thermal stabilization and insolubility resulting from the synthesis conditions used are interesting features to prepare solvent and heat resistant poly(ω-OHC16) coatings. Thus, a few microns thick poly(ω-OHC16) layer has been fabricated on aluminum foil and its resistivity towards a chloroform:methanol (1:1, v:v) mixture has been confirmed. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44350. [ABSTRACT FROM AUTHOR]

Published
2017
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34. Polyester films obtained by noncatalyzed melt-condensation polymerization of aleuritic (9,10,16-trihydroxyhexadecanoic) acid in air.

Author

Benítez, José Jesús, Heredia‐Guerrero, José Alejandro, Guzmán‐Puyol, Susana, Domínguez, Eva, and Heredia, Antonio

Subjects
POLYESTER films, POLYCONDENSATION, BIOMIMETIC chemicals, ACIDS, ESTERIFICATION, AIR
Abstract

ABSTRACT To mimic nontoxic and fully biodegradable biopolymers like the plant cutin, polyester films from a natural occurring fatty polyhydroxyacid like aleuritic (9,10,16-trihydroxyhexadecanoic) acid have been prepared by noncatalyzed melt-polycondensation at moderate temperature (150°C) directly in air. The course of the reaction has been followed by infrared spectroscopy, 13C magic angle spinning nuclear magnetic resonance spectroscopy, differential scanning calorimetry and X-ray diffraction and well differentiated stages are observed. First, a high conversion esterification reaction leads to an amorphous rubbery, infusible, and insoluble material whose structure is made out of ester linkages mostly involving primary hydroxyls and partially branched by minor esterification with secondary ones. Following the esterification stage, the cleavage of vicinal secondary hydroxyls and further oxidation to carboxylic acid is observed at the near surface region of films. New carboxylic groups created also undergo esterification and generate cross-linking points within the polymer structure. Additionally, and despite the harsh preparation conditions used, very little additional side reaction like peroxidation and dehydration are observed. Results demonstrate the feasibility of polyester films fabrication from a reference fatty polyhydroxyacid like aleuritic acid by noncatalyzed melt-polycondensation directly in air. The methodology can potentially be extended to similar natural occurring hydroxyacids to obtain films and coatings to be used, for instance, as nontoxic and biodegradable food packaging material. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41328. [ABSTRACT FROM AUTHOR]

Published
2015
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35. Long-Chain Polyhydroxyesters from Natural Occurring Aleuritic Acid as Potential Material for Food Packaging.

Author

Benítez, José Jesús, Heredia-Guerrero, José Alejandro, Guzmán-Puyol, Susana, Domínguez, Eva, and Heredia, Antonio

Subjects
*FOOD packaging, *PACKAGING materials, *BIODEGRADABLE materials, *MONOMERS, *CUTIN, *POLYCONDENSATION
Abstract

Fatty polyhydroxyesters (C≥16) are present in nature as barrier polymers like cutin in some protective tissues of higher plants. The mimicry of these biopolymers is regarded as a strategy to design nontoxic and fully biodegradable food packaging films and coatings. To obtain cutin inspired materials we have used a natural occurring polyhydroxylated monomer like aleuritic (9,10,16-trihydroxypalmitic) acid and a direct and scalable synthesis route consisting in the noncatalyzed melt-condensation polymerization in air. To reduce the number of hydroxyl groups and to increase hydrophobicity, palmitic acid has been used as a capping agent. Aleuritic-palmitic polyhydroxyesteres films have been obtained and characterized. [ABSTRACT FROM PUBLISHER]

Published
2015
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