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Open AccessEditorial

Statement of Peer Review

by Luis Zamora-Peredo and Marcos Luna-Cervantes

Mater. Proc. 2025, 28(1), 10; https://doi.org/10.3390/materproc2025028010 - 6 Jan 2026

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(This article belongs to the Proceedings of The International Symposium on Nanotechnology for Medicine, Environment and Energy)

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Open AccessEditorial

Preface of the International Symposium on Nanotechnology for Medicine, Environment and Energy

by Luis Zamora-Peredo and Marcos Luna-Cervantes

Mater. Proc. 2025, 28(1), 11; https://doi.org/10.3390/materproc2025028011 - 6 Jan 2026

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(This article belongs to the Proceedings of The International Symposium on Nanotechnology for Medicine, Environment and Energy)

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7 pages, 886 KB

Open AccessProceeding Paper

ZnO Nanoparticle-Based Pickering Emulsions with Improved Rheology and Functional Performance: A Comparative Approach

by César Uriel Rodríguez-Fuentes, Oscar O. Romero-Chapol and Cynthia Cano-Sarmiento

Mater. Proc. 2025, 28(1), 1; https://doi.org/10.3390/materproc2025028001 - 9 Dec 2025

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Abstract

The use of natural compounds and nanostructured systems offers an alternative photoprotection strategy with fewer adverse effects. This study developed a Pickering emulsion based on green coffee oil and quercetin, stabilized with zinc oxide nanoparticles, and compared its rheological and spreading properties with [...] Read more.

The use of natural compounds and nanostructured systems offers an alternative photoprotection strategy with fewer adverse effects. This study developed a Pickering emulsion based on green coffee oil and quercetin, stabilized with zinc oxide nanoparticles, and compared its rheological and spreading properties with commercial sunscreens. Flow curve, thixotropy, and oscillatory tests were conducted to assess structural stability and shear response. The emulsion exhibited gel-like behavior, a higher yield stress, and superior spreading performance. Although its bioactivity was not evaluated, the formulation proved to be a viable and functional alternative for topical photoprotection applications. Full article

(This article belongs to the Proceedings of The International Symposium on Nanotechnology for Medicine, Environment and Energy)

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8 pages, 2170 KB

Open AccessProceeding Paper

Characterization of Nanocapsules of Sodium Alginate and Moringa oleifera Extract by AFM as a Therapeutic Alternative

by Erick Barrita Marroquín, Antonio Canseco Urbieta, Francisco Emanuel Velásquez Hernández, Fernando Mejía Zarate, Arturo Zapién Martínez and Ivonne Arisbeth Diaz Santiago

Mater. Proc. 2025, 28(1), 2; https://doi.org/10.3390/materproc2025028002 - 11 Dec 2025

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Abstract

Alginate nanocapsules loaded with Moringa oleifera extract, a plant traditionally used for its hypoglycemic properties, were developed as a therapeutic alternative for type II diabetes mellitus. The nanocapsules were obtained by manually spraying a WO emulsion with an airbrush and were stabilized in [...] Read more.

Alginate nanocapsules loaded with Moringa oleifera extract, a plant traditionally used for its hypoglycemic properties, were developed as a therapeutic alternative for type II diabetes mellitus. The nanocapsules were obtained by manually spraying a WO emulsion with an airbrush and were stabilized in 2% calcium chloride. Characterization by atomic force microscopy revealed spherical particles with an average diameter of 10.087 nm, an area of 298.441 nm², and a density of 0.207556/nm², confirming efficient encapsulation and uniform morphology. This low-cost method is promising for the creation of controlled release systems in resource-limited settings. Full article

(This article belongs to the Proceedings of The International Symposium on Nanotechnology for Medicine, Environment and Energy)

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7 pages, 1757 KB

Open AccessProceeding Paper

Effect of Voltage and Ag Concentration on the Formation of Ag Nanostructures on TiO₂ Nanotubes

by Guadalupe Mata, Alan Maytorena, Oscar Velázquez, Marbeyalit Tiburcio, Luiz Zamora, Julián Hernández, Leandro García, Teresita Olivares and Leticia Pérez

Mater. Proc. 2025, 28(1), 3; https://doi.org/10.3390/materproc2025028003 - 9 Dec 2025

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Abstract

Surface-enhanced Raman spectroscopy (SERS) is a highly sensitive technique for detecting heavy metals through the plasmonic effect of metallic nanoparticles. In this study, TiO₂ nanotubes were used as substrates due to their stability, large surface area, and ordered morphology. Silver nanostructures were [...] Read more.

Surface-enhanced Raman spectroscopy (SERS) is a highly sensitive technique for detecting heavy metals through the plasmonic effect of metallic nanoparticles. In this study, TiO₂ nanotubes were used as substrates due to their stability, large surface area, and ordered morphology. Silver nanostructures were electrodeposited to enhance the SERS response by generating hot spots. The influence of voltage and Ag concentration on electrodeposition was analyzed using methylene blue (1 × 10⁻⁵ M) as a probe molecule. Higher voltages and concentrations promoted dendritic growth, reaching Raman intensities above 70,000 a.u., optimizing sensitivity. All experiments were conducted in triplicate to ensure reproducibility. Full article

(This article belongs to the Proceedings of The International Symposium on Nanotechnology for Medicine, Environment and Energy)

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9 pages, 816 KB

Open AccessProceeding Paper

Hierarchical Ag-Doped Hydroxyapatite Coatings on TiO₂ Nanotubes Formed on Ti-407 Alloy: Antibacterial Evaluation Against Escherichia coli

by Angie P. Tamayo-Jimenez, Frank E. Melendez-Anzures, Maria P. Barron-Gonzalez, Enrique M. Lopez-Cuellar, Yadira Quiñones-Gutierrez, Javier A. Garza-Guajardo and Azael Martinez-De la Cruz

Mater. Proc. 2025, 28(1), 4; https://doi.org/10.3390/materproc2025028004 - 11 Dec 2025

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Abstract

Postoperative infections in orthopedic implants remain a major complication, particularly in open fractures, where early bacterial colonization and the limited bioactivity of titanium alloys hinder osseointegration. This study reports a hierarchical coating synthesized in situ on Ti-407 alloy, integrating bioactive and antibacterial functions. [...] Read more.

Postoperative infections in orthopedic implants remain a major complication, particularly in open fractures, where early bacterial colonization and the limited bioactivity of titanium alloys hinder osseointegration. This study reports a hierarchical coating synthesized in situ on Ti-407 alloy, integrating bioactive and antibacterial functions. TiO₂ nanotube arrays were formed by anodization and subsequently functionalized by sequential electrodeposition of Ag nanoparticles and doped hydroxyapatite (HA) (Ca, P, Mg, Zn). SEM/EDS confirmed uniform coatings with a Ca/P ratio near stoichiometric HA (1.61). Agar diffusion assays against E. coli ATCC® 25922™ revealed well-defined inhibition zones, confirming the antibacterial efficacy of the coatings. These findings highlight the potential of hierarchical coatings to enhance bone integration while reducing infection risk in orthopedic implants. Full article

(This article belongs to the Proceedings of The International Symposium on Nanotechnology for Medicine, Environment and Energy)

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5 pages, 694 KB

Open AccessProceeding Paper

Characterization of Chitosan Nanocapsules as a Biocompatible Polymeric System

by Rodrigo Emmanuel Ruiz Cruz, Antonio Canseco Urbieta, Francisco Emanuel Velásquez Hernández, Gabriel Sánchez Cruz, Joel Jiménez Ochoa, Alfonso Jesús Bautista Ramírez and Ivonne Arisbeth Díaz Santiago

Mater. Proc. 2025, 28(1), 5; https://doi.org/10.3390/materproc2025028005 - 11 Dec 2025

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In this study, the solvent displacement method was used. This is a low-energy technique that generates a spontaneous “oil-in-water” nanoemulsion by diffusing ethanol from the oily phase to the aqueous phase. Subsequently, chitosan, a biocompatible and biodegradable cationic polymer, was incorporated, applying ionic [...] Read more.

In this study, the solvent displacement method was used. This is a low-energy technique that generates a spontaneous “oil-in-water” nanoemulsion by diffusing ethanol from the oily phase to the aqueous phase. Subsequently, chitosan, a biocompatible and biodegradable cationic polymer, was incorporated, applying ionic gelation with sodium sulfate (Na₂SO₄) to achieve uniform coatings. Atomic force microscopy (AFM) characterization revealed nanocapsules with defined morphology and regular topography. Analysis with WSxM 4.0 Beta 10 software revealed a partially ordered hexagonal arrangement, which was evidence of controlled synthesis and the potential of chitosan as a polymeric system. Full article

(This article belongs to the Proceedings of The International Symposium on Nanotechnology for Medicine, Environment and Energy)

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9 pages, 599 KB

Open AccessProceeding Paper

Synthesis, Suspension Stability, and Bioactivity of Curcumin-Carrying Chitosan Polymeric Nanoparticles

by Manuel Iza-Anaya, César Uriel Rodríguez-Fuentes, Abigail Varela-Pérez and Cynthia Cano-Sarmiento

Mater. Proc. 2025, 28(1), 6; https://doi.org/10.3390/materproc2025028006 - 17 Dec 2025

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Abstract

Curcumin is a phenolic compound with antioxidant and anti-inflammatory properties; however, due to its low bioavailability, the use of encapsulation systems is recommended. Chitosan-based polymeric nanoparticles produced via ionic gelation offer controlled release, though their storage stability remains limited. In this work, the [...] Read more.

Curcumin is a phenolic compound with antioxidant and anti-inflammatory properties; however, due to its low bioavailability, the use of encapsulation systems is recommended. Chitosan-based polymeric nanoparticles produced via ionic gelation offer controlled release, though their storage stability remains limited. In this work, the incorporation of collagen-derived peptides, NaCl, and Tween^® 80 was evaluated as a strategy to enhance physicochemical performance. A 2³ factorial design was used to identify the most relevant formulation components, resulting in four stable systems capable of retaining curcumin and preserving its antioxidant and anti-inflammatory activity during storage. These findings highlight the potential of chitosan-based systems for improving the functional performance of curcumin and suspension stability. Full article

(This article belongs to the Proceedings of The International Symposium on Nanotechnology for Medicine, Environment and Energy)

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7 pages, 3422 KB

Open AccessProceeding Paper

Silver Nanostars Spread on Cu(OH)₂ Nanowires for SERS Substrates

by José Luis Zamora Navarro, Diana Jiménez Girón, Hector Ariel Renteral Rodríguez, Yuri Okolodkov, Marcos Luna Cervantes, Guillermo Santana Rodríguez, Julián Hernández Torres and Luis Zamora Peredo

Mater. Proc. 2025, 28(1), 7; https://doi.org/10.3390/materproc2025028007 - 11 Dec 2025

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In this work, the plasmonic performance of SERS substrates fabricated by two methods was evaluated: the first method involves simultaneously reducing and depositing silver nanostars (AgNSs) onto copper hydroxide nanowires (Cu(OH)₂-NWs), and the second method involves dripping a pre-synthesized and concentrated [...] Read more.

In this work, the plasmonic performance of SERS substrates fabricated by two methods was evaluated: the first method involves simultaneously reducing and depositing silver nanostars (AgNSs) onto copper hydroxide nanowires (Cu(OH)₂-NWs), and the second method involves dripping a pre-synthesized and concentrated solution of AgNSs onto the surface of the Cu(OH)₂-NWs. The distribution of AgNSs was characterized by SEM and compared with those deposited on glass after reaction times from 1 to 21 h. A more homogeneous AgNS distribution was observed on the nanowires. The SERS performance was evaluated using methylene blue (MB) as a probe molecule. The SERS intensity on substrates with Cu(OH)₂-NWs was 10 times better than the substrates with glass. Furthermore, the SERS intensity was tripled by dripping a more concentrated solution of AgNSs. This demonstrates that Cu(OH)₂-NWs significantly improve the homogeneity of SERS substrates by increasing the distribution of the metallic nanostructures. Full article

(This article belongs to the Proceedings of The International Symposium on Nanotechnology for Medicine, Environment and Energy)

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1316 KB

Open AccessProceeding Paper

Silicon Fiber Optic Coating with Zinc Oxide Nanoparticles Characterized by AFM

by Saira Ximena Mendoza-Lopez, Jaime Gutiérrez-Gutiérrez, Marciano Vargas-Treviño, Antonio Canseco-Urbieta, Rosa María Velázquez-Cueto, Ivonne Arisbeth Díaz-Santiago and José Luis Cano-Pérez

Mater. Proc. 2025, 28(1), 8; https://doi.org/10.3390/materproc2025028008 (registering DOI) - 17 Dec 2025

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This paper presents the preparation and characterization of single-mode optical fibers coated with zinc oxide (ZnO) nanoparticles using the immersion technique. The study was carried out in three stages: the first consisted of pretreating the fiber by means of controlled immersion in HCl [...] Read more.

This paper presents the preparation and characterization of single-mode optical fibers coated with zinc oxide (ZnO) nanoparticles using the immersion technique. The study was carried out in three stages: the first consisted of pretreating the fiber by means of controlled immersion in HCl and H₂SO₄ solutions and exposure in a muffle furnace; the second involved the growth and deposition of ZnO nanoparticles synthesized in a laboratory; and the third was characterization by means of atomic force microscopy (AFM). In this last stage, we obtained through AFM that Sample 1, considered optimized, presented high particle density (9.203 particles/µm²), an RMS roughness (Rq) of 2.98 nm, and average roughness (Ra) of 1.82 nm, as well as an average height of 1.117 nm. These parameters reflect a uniform and stable surface, desirable conditions for applications in the development of high-sensitivity optical sensors and biosensors. Full article

(This article belongs to the Proceedings of The International Symposium on Nanotechnology for Medicine, Environment and Energy)

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14 pages, 1652 KB

Open AccessProceeding Paper

Enhancing the Structural and Capacitance Properties of BiCeO₃ Through Thiourea Doping for Supercapacitor Applications

by Yael Bedolla-Pluma, Dulce Y. Medina-Velázquez, Luis A. Garcés-Patiño, Abraham Pacio-Castillo, Efraín Meneses-Juárez, Eduardo López-López, Angel Castro-Agüero and Arturo Ortiz-Arroyo

Mater. Proc. 2025, 28(1), 9; https://doi.org/10.3390/materproc2025028009 - 23 Dec 2025

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Abstract

Supercapacitors based on mixed metal oxides are being developed as potential devices for large-scale energy storage applications with physical flexibility, thanks to their low cost and good electrochemical performance. This work demonstrates a novel approach to enhancing the electrochemical performance of bismuth–cerium oxide [...] Read more.

Supercapacitors based on mixed metal oxides are being developed as potential devices for large-scale energy storage applications with physical flexibility, thanks to their low cost and good electrochemical performance. This work demonstrates a novel approach to enhancing the electrochemical performance of bismuth–cerium oxide BiCeO₃ (BC) through thiourea doping. The incorporation of sulfur, confirmed by EDS, induced significant structural modifications, including a reduction in crystallite size from 42.5 nm to 34.8 nm and the emergence of new diffraction planes (002) and (222) in XRD patterns. These changes, indicative of successful lattice doping, yielded a more nanostructured morphology with increased active surface area and a 20% reduction in the optical band gap. Electrochemically, the thiourea-doped BiCeO₃ (BCT) electrode delivered a marked improvement, exhibiting a specific capacitance of 150 F·g⁻¹ at 25 mV·s⁻¹, a 17.2% increase over the pure BiCeO₃ (128 F·g⁻¹). Furthermore, BCT demonstrated superior rate capability and a 43% reduction in overall impedance, underscoring enhanced charge transfer kinetics and ionic conductivity. The synergy between sulfur-induced structural defects, increased electroactive surface area, and improved electronic structure establishes thiourea doping as an effective strategy for developing high-performance BiCeO₃-based supercapacitors. Full article

(This article belongs to the Proceedings of The International Symposium on Nanotechnology for Medicine, Environment and Energy)

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