Pub Date : 2023-05-22DOI: 10.47566/2023_syv36_1-230501
A. González-Hernández, E. Suárez-Domínguez, E. Izquierdo-Kulich, A. Morales‐Cepeda
Surface coating is a method used for protection against corrosion and environmental impact for metals. In the case of solid surfaces, coatings can be achieved by radio-frequency magnetron sputtering or other corrosion-resistant substances, which may involve the deposition of one or more layers, depending on the procedure involved, modifying the morphology of the surface and surface area. This work aims to study the relationship of two surface morphological methods through roughness and fractal dimension measurements in top-surface coatings, bilayer Ti/WTiN/WTiC (named as n = 1); multilayer [Ti/WTiN/WTiC] (named as n = 40) deposited by RF-magnetron sputtering. The measurements were obtained by profilometer and image processing pixel intensity. The topography of each coating exhibited texture with impurities as domes distributed in small cluster island types. The surface roughness were 9.42 and 18.63 nm; fractal dimension measurements were 2.55 and 2.32, respectively, with a low correlation between roughness and fractal dimension. The R-squared analysis exhibited a good relationship between the fractal dimension values, tending linear regression negative. The result of factorial design 22 confirmed the performance correlation and linear regression analyses. The fractal dimension measurements by the optical method can be great potential to evaluate surface roughness complementary in applications such as laboratories and even in scale industrial. Thus the result of statistical treatment shows high accuracy in the measurements.
{"title":"Relationship analysis of surface roughness measurements on coatings using AFM and fractal dimension by mesoscopic model methods","authors":"A. González-Hernández, E. Suárez-Domínguez, E. Izquierdo-Kulich, A. Morales‐Cepeda","doi":"10.47566/2023_syv36_1-230501","DOIUrl":"https://doi.org/10.47566/2023_syv36_1-230501","url":null,"abstract":"Surface coating is a method used for protection against corrosion and environmental impact for metals. In the case of solid surfaces, coatings can be achieved by radio-frequency magnetron sputtering or other corrosion-resistant substances, which may involve the deposition of one or more layers, depending on the procedure involved, modifying the morphology of the surface and surface area. This work aims to study the relationship of two surface morphological methods through roughness and fractal dimension measurements in top-surface coatings, bilayer Ti/WTiN/WTiC (named as n = 1); multilayer [Ti/WTiN/WTiC] (named as n = 40) deposited by RF-magnetron sputtering. The measurements were obtained by profilometer and image processing pixel intensity. The topography of each coating exhibited texture with impurities as domes distributed in small cluster island types. The surface roughness were 9.42 and 18.63 nm; fractal dimension measurements were 2.55 and 2.32, respectively, with a low correlation between roughness and fractal dimension. The R-squared analysis exhibited a good relationship between the fractal dimension values, tending linear regression negative. The result of factorial design 22 confirmed the performance correlation and linear regression analyses. The fractal dimension measurements by the optical method can be great potential to evaluate surface roughness complementary in applications such as laboratories and even in scale industrial. Thus the result of statistical treatment shows high accuracy in the measurements.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134438617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-12DOI: 10.47566/2023_syv36_1-230401
Y. Kudriavtsev, Claudia Hernandez-Mosqueira, R. Asomoza
In this paper, we have shown the results of the analysis by the SIMS method of mouse fibroblast cells (3T3-F44A2 line) grown on the silicon surface and fixed by using different chemicals. It was concluded that the standard method of dehydration and fixation of cells with the help of glutaraldehyde allows us to prepare relevant samples for analysis by the SIMS in ultrahigh vacuum. Ion images of chemical elements inside cells with a sufficiently high lateral resolution were obtained, allowing us to study, among other things, the internal structure of cells. The use of SIMS looks preferable for the analysis of cellular metabolism, cell differentiation, ischemia and other processes in cells and tissues grown using special medications and (or) reagents with an artificial isotopic composition of stable isotopes.
{"title":"TOF–SIMS analysis of mouse fibroblasts cells","authors":"Y. Kudriavtsev, Claudia Hernandez-Mosqueira, R. Asomoza","doi":"10.47566/2023_syv36_1-230401","DOIUrl":"https://doi.org/10.47566/2023_syv36_1-230401","url":null,"abstract":"In this paper, we have shown the results of the analysis by the SIMS method of mouse fibroblast cells (3T3-F44A2 line) grown on the silicon surface and fixed by using different chemicals. It was concluded that the standard method of dehydration and fixation of cells with the help of glutaraldehyde allows us to prepare relevant samples for analysis by the SIMS in ultrahigh vacuum. Ion images of chemical elements inside cells with a sufficiently high lateral resolution were obtained, allowing us to study, among other things, the internal structure of cells. The use of SIMS looks preferable for the analysis of cellular metabolism, cell differentiation, ischemia and other processes in cells and tissues grown using special medications and (or) reagents with an artificial isotopic composition of stable isotopes.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134212415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.47566/2022_syv35_0-220001
M. A. Santana-Aranda
We are grateful to our contributor authors for choosing Superficies y Vacío to disseminate their research results, as well as the selfless contribution of the peers who accepted to review the received manuscripts, helping to keep a high-quality standard for the articles that we publish. We hope for both communities to grow further in the times to come. We are pleased to highlight the integration of some updates to our publishing process: registration of Digital Object Identifier (DOI), through CrossRef, along with automatic registration to the authors’ Open Researcher and Contributor ID (ORCID), within an Open Journal Systems (OJS) editorial platform; and to the print format of the published articles, keeping our usual author grouping by institution, and adding the standard ordered authorship list below the title. We also transitioned our review process from single- to double-blind. And have been fulfilling a self-imposed ‘1.5 weeks’ deadline for a first answer with recommendations from a member of the editorial board, which is successfully reducing the time span of our peer review process.
{"title":"Closing Editorial Note","authors":"M. A. Santana-Aranda","doi":"10.47566/2022_syv35_0-220001","DOIUrl":"https://doi.org/10.47566/2022_syv35_0-220001","url":null,"abstract":"We are grateful to our contributor authors for choosing Superficies y Vacío to disseminate their research results, as well as the selfless contribution of the peers who accepted to review the received manuscripts, helping to keep a high-quality standard for the articles that we publish. We hope for both communities to grow further in the times to come.\u0000We are pleased to highlight the integration of some updates to our publishing process: registration of Digital Object Identifier (DOI), through CrossRef, along with automatic registration to the authors’ Open Researcher and Contributor ID (ORCID), within an Open Journal Systems (OJS) editorial platform; and to the print format of the published articles, keeping our usual author grouping by institution, and adding the standard ordered authorship list below the title. We also transitioned our review process from single- to double-blind. And have been fulfilling a self-imposed ‘1.5 weeks’ deadline for a first answer with recommendations from a member of the editorial board, which is successfully reducing the time span of our peer review process.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126145468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-29DOI: 10.47566/2022_syv35_1-221202
Johan Andrés Vargas Rueda, A. Alonso, M. Meléndez-Lira
In order to control the deposition of Zn-related films by chemical bath deposition, the effects of Zn-complexing agent are analyzed. ZnS films were produced by chemical bath deposition technique employing sodium citrate, ethanolamine and Triethanolamine as complexing agents. The deposition conditions for ZnS (ZnO) thin films were obtained through a thermodynamic analysis, using distribution diagrams for molar fraction of Zn complexes. From species distribution diagrams of Zn-ethanolamine, Zn-Triethanolamine and Zn-citrate. It was found that for pH values between 4 and 6 the highest Zn fraction is obtained. The results highlight the importance of complexing agent morphology, while the use of ethanolamine and triethanolamine produce ZnO films due to their high reactivity; the use of sodium citrate produce ZnS films. Deposited ZnS films have a cubic structure, n-type conductivity, resistivity of 8.36×104 ??cm with a 3.75 eV bandgap.
{"title":"The role of Zn-complexing agents in the chemical bath deposition of ZnO and ZnS thin films","authors":"Johan Andrés Vargas Rueda, A. Alonso, M. Meléndez-Lira","doi":"10.47566/2022_syv35_1-221202","DOIUrl":"https://doi.org/10.47566/2022_syv35_1-221202","url":null,"abstract":"In order to control the deposition of Zn-related films by chemical bath deposition, the effects of Zn-complexing agent are analyzed. ZnS films were produced by chemical bath deposition technique employing sodium citrate, ethanolamine and Triethanolamine as complexing agents. The deposition conditions for ZnS (ZnO) thin films were obtained through a thermodynamic analysis, using distribution diagrams for molar fraction of Zn complexes. From species distribution diagrams of Zn-ethanolamine, Zn-Triethanolamine and Zn-citrate. It was found that for pH values between 4 and 6 the highest Zn fraction is obtained. The results highlight the importance of complexing agent morphology, while the use of ethanolamine and triethanolamine produce ZnO films due to their high reactivity; the use of sodium citrate produce ZnS films. Deposited ZnS films have a cubic structure, n-type conductivity, resistivity of 8.36×104 ??cm with a 3.75 eV bandgap.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"52 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132496781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-23DOI: 10.47566/2022_syv35_1-221201
M. F. Ramírez-Ayala, T. Pérez-Juache, A. Herrera-González, A. Guerrero
In this work, neodymium (Nd3+) doped strontium hexaferrite was obtained using the sol–gel based Pechini method. The cation distribution was modified by doping with different amounts of Nd3+ ions when 0.0 ? x ? 0.4 according to the chemical expression Sr1-xNdxFe12O19 the powders were sintered at 1100 °C for 1 h. The influence of the neodymium was analyzed, and the magnetic and structural properties have been associated with the fabrication method. The crystalline phases, structure, and particle morphology of the samples were determined by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. In addition, the magnetic properties were measured at room temperature using a vibrating sample magnetometer with an applied field of up to 20 kOe. Moreover, magnetization and coercivity values are influenced by the neodymium content. The results showed that the Pechini sol-gel method allows a limited solubility of the Nd3+ ions on the hexaferrite structure.
{"title":"Effect of the neodymium doping on the magnetic and structural properties of the Sr-hexaferrite obtained by the Pechini method","authors":"M. F. Ramírez-Ayala, T. Pérez-Juache, A. Herrera-González, A. Guerrero","doi":"10.47566/2022_syv35_1-221201","DOIUrl":"https://doi.org/10.47566/2022_syv35_1-221201","url":null,"abstract":"In this work, neodymium (Nd3+) doped strontium hexaferrite was obtained using the sol–gel based Pechini method. The cation distribution was modified by doping with different amounts of Nd3+ ions when 0.0 ? x ? 0.4 according to the chemical expression Sr1-xNdxFe12O19 the powders were sintered at 1100 °C for 1 h. The influence of the neodymium was analyzed, and the magnetic and structural properties have been associated with the fabrication method. The crystalline phases, structure, and particle morphology of the samples were determined by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. In addition, the magnetic properties were measured at room temperature using a vibrating sample magnetometer with an applied field of up to 20 kOe. Moreover, magnetization and coercivity values are influenced by the neodymium content. The results showed that the Pechini sol-gel method allows a limited solubility of the Nd3+ ions on the hexaferrite structure.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128288468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-31DOI: 10.47566/2022_syv35_1-221001
Yanet E. Aguirre-Chagala, V. Altuzar, H. Beltrán, S. Muñoz-Aguirre, Efraín Garrido, R. Ruiz-Ramos, Claudia Mendoza Barrera
Bioinspired membranes as extracellular matrices are desired for skin regeneration. Herein, we fabricate four systems of fibrillar membranes composed of polycaprolactone (PCL), aminolyzed PCL, denatured collagen type I (C), and the blend of collagen hydrolysate types I and III (bC) or elastin (E), fabricated by the electrospinning process. The superficial features by SEM and optical profilometry, mechanical properties by puncture strength assays, and biological evaluation with a human keratinocyte cell line (HaCaT) for one day of aPCL6bCE (aPCL/collagen hydrolysate type I and III/Elastin), aPCL6CE (aPCL/denaturated Col I/elastin), aPCL6bC (aPCL/collagen hydrolysate type I and III), and PCL6bCE (PCL/collagen hydrolysate type I and III/Elastin) membranes are described. The aPCL6bCE and aPCL6CE fibers resulted in better structural properties for culturing cells, while aPCL6bC and PCL6bCE membranes have shown lower viability for keratinocytes, probably due to their different chemical surface and nanotopography. The roughness of these materials varied from 4.53 to 114.4 µm, depending on their diameter values. Puncture strength results were not significantly different within 2.25–2.66 MPa. Our results suggest that aPCL6bCE and aPCL6CE fibers have potential applications in skin tissue engineering, where the synergy among aminolyzed PCL and E seems to be a prerequisite to developing such activity.
{"title":"Mechanical properties and Keratinocytes cellular evaluation of Polycaprolactone/Collagen/Elastin Electrospun Fiber Scaffolds","authors":"Yanet E. Aguirre-Chagala, V. Altuzar, H. Beltrán, S. Muñoz-Aguirre, Efraín Garrido, R. Ruiz-Ramos, Claudia Mendoza Barrera","doi":"10.47566/2022_syv35_1-221001","DOIUrl":"https://doi.org/10.47566/2022_syv35_1-221001","url":null,"abstract":"Bioinspired membranes as extracellular matrices are desired for skin regeneration. Herein, we fabricate four systems of fibrillar membranes composed of polycaprolactone (PCL), aminolyzed PCL, denatured collagen type I (C), and the blend of collagen hydrolysate types I and III (bC) or elastin (E), fabricated by the electrospinning process. The superficial features by SEM and optical profilometry, mechanical properties by puncture strength assays, and biological evaluation with a human keratinocyte cell line (HaCaT) for one day of aPCL6bCE (aPCL/collagen hydrolysate type I and III/Elastin), aPCL6CE (aPCL/denaturated Col I/elastin), aPCL6bC (aPCL/collagen hydrolysate type I and III), and PCL6bCE (PCL/collagen hydrolysate type I and III/Elastin) membranes are described. The aPCL6bCE and aPCL6CE fibers resulted in better structural properties for culturing cells, while aPCL6bC and PCL6bCE membranes have shown lower viability for keratinocytes, probably due to their different chemical surface and nanotopography. The roughness of these materials varied from 4.53 to 114.4 µm, depending on their diameter values. Puncture strength results were not significantly different within 2.25–2.66 MPa. Our results suggest that aPCL6bCE and aPCL6CE fibers have potential applications in skin tissue engineering, where the synergy among aminolyzed PCL and E seems to be a prerequisite to developing such activity.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"156-157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124046915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-20DOI: 10.47566/2022_syv35_1-220801
Hermicenda Perez Vidal, María Antonia Lunagómez Rocha, S. García Hernández, J.G. Pacheco Sosa, J.G. Torres Torres, T.A. Zepeda Partida
Se sintetizaron una serie de catalizadores de paladio (0.5, 1.5 y 3.0% en peso), mediante impregnación a volumen de poro en un tamiz molecular mesoporoso a base de sílice (SBA-15). Todos los materiales se caracterizaron por Fisisorción de N2, DRX, MEB y HR-TEM. La actividad catalítica se evaluó en la oxidación catalítica vía húmeda (OCVH) del fenol a 160°C, 10 bar, 200 mg de catalizador y 200 mL de fenol de una solución de 500 ppm. Los resultados de la caracterización muestran una gran influencia del contenido metálico de Pd; el área específica disminuye al introducir un mayor porcentaje de paladio. Los materiales presentaron textura, estructura y morfología acorde a lo reportado en la literatura. Se encontró que el tamaño de las especies de óxido de paladio soportadas, formadas durante la etapa de calcinación fue menor en el catalizador con menor contenido metálico (Pd0.5/SBA-15) y este fue el más activo en la degradación de fenol y degradó 64 % de fenol, siendo el más activo de los catalizadores.
{"title":"Catalizadores Pd/SBA-15 en la oxidación catalítica vía húmeda del fenol","authors":"Hermicenda Perez Vidal, María Antonia Lunagómez Rocha, S. García Hernández, J.G. Pacheco Sosa, J.G. Torres Torres, T.A. Zepeda Partida","doi":"10.47566/2022_syv35_1-220801","DOIUrl":"https://doi.org/10.47566/2022_syv35_1-220801","url":null,"abstract":"Se sintetizaron una serie de catalizadores de paladio (0.5, 1.5 y 3.0% en peso), mediante impregnación a volumen de poro en un tamiz molecular mesoporoso a base de sílice (SBA-15). Todos los materiales se caracterizaron por Fisisorción de N2, DRX, MEB y HR-TEM. La actividad catalítica se evaluó en la oxidación catalítica vía húmeda (OCVH) del fenol a 160°C, 10 bar, 200 mg de catalizador y 200 mL de fenol de una solución de 500 ppm. Los resultados de la caracterización muestran una gran influencia del contenido metálico de Pd; el área específica disminuye al introducir un mayor porcentaje de paladio. Los materiales presentaron textura, estructura y morfología acorde a lo reportado en la literatura. Se encontró que el tamaño de las especies de óxido de paladio soportadas, formadas durante la etapa de calcinación fue menor en el catalizador con menor contenido metálico (Pd0.5/SBA-15) y este fue el más activo en la degradación de fenol y degradó 64 % de fenol, siendo el más activo de los catalizadores.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114689307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-08DOI: 10.47566/2022_syv35_1-220601
Miguel Ángel González Morales, J. C. Cruz Bueno, Gerardo Villa Martínez, Manolo Ramírez López, Daniel Flores Ramírez, Patricia Rodríguez Fragoso, Jose Luis Herrera Pérez, Yenny Lucero Casallas Moreno, J. Mendoza Álvarez
We report the growth of In0.145Ga0.855As0.132Sb0.868 layers on GaSb(100) substrates by the liquid phase epitaxy (LPE) technique using the ramp-cooling method. We achieved a near-lattice-matched epitaxial growth with a lattice mismatch of between the quaternary layer and GaSb(100) substrate due to optimal growth parameters. Aberration-corrected scanning transmission electron microscope (AC-STEM) confirmed the high crystalline quality of the quaternary layer and the low lattice mismatch in the heterostructure, without the presence of linear or planar defects. Also, the Secondary Ion Mass Spectrometry (SIMS) technique evidenced a uniform distribution of the atomic elements along the quaternary layer and an abrupt interface between the In0.145Ga0.855As0.132Sb0.868 layer and the GaSb substrate. Plasmon-phonon interactions were observed by Raman spectroscopy indicating that the crystalline quality increases at greater depth in the sample with respect to the surface. The quaternary layer presented a uniform and flat morphology, and luminescence emission attributed to the recombination of bound exciton states at 641 meV. The structural, chemical, and optical properties of the In0.145Ga0.855As0.132Sb0.868 layer demonstrated that it could be auspicious material for infrared range optoelectronic applications. Likewise, the LPE technique successfully shows that it should be used to grow near-lattice-matched heterostructures.
{"title":"Importance of liquid phase epitaxy on achieving near-lattice-matched growth of In0.145Ga0.855As0.132Sb0.868 layers on GaSb(100) substrates","authors":"Miguel Ángel González Morales, J. C. Cruz Bueno, Gerardo Villa Martínez, Manolo Ramírez López, Daniel Flores Ramírez, Patricia Rodríguez Fragoso, Jose Luis Herrera Pérez, Yenny Lucero Casallas Moreno, J. Mendoza Álvarez","doi":"10.47566/2022_syv35_1-220601","DOIUrl":"https://doi.org/10.47566/2022_syv35_1-220601","url":null,"abstract":"We report the growth of In0.145Ga0.855As0.132Sb0.868 layers on GaSb(100) substrates by the liquid phase epitaxy (LPE) technique using the ramp-cooling method. We achieved a near-lattice-matched epitaxial growth with a lattice mismatch of between the quaternary layer and GaSb(100) substrate due to optimal growth parameters. Aberration-corrected scanning transmission electron microscope (AC-STEM) confirmed the high crystalline quality of the quaternary layer and the low lattice mismatch in the heterostructure, without the presence of linear or planar defects. Also, the Secondary Ion Mass Spectrometry (SIMS) technique evidenced a uniform distribution of the atomic elements along the quaternary layer and an abrupt interface between the In0.145Ga0.855As0.132Sb0.868 layer and the GaSb substrate. Plasmon-phonon interactions were observed by Raman spectroscopy indicating that the crystalline quality increases at greater depth in the sample with respect to the surface. The quaternary layer presented a uniform and flat morphology, and luminescence emission attributed to the recombination of bound exciton states at 641 meV. The structural, chemical, and optical properties of the In0.145Ga0.855As0.132Sb0.868 layer demonstrated that it could be auspicious material for infrared range optoelectronic applications. Likewise, the LPE technique successfully shows that it should be used to grow near-lattice-matched heterostructures.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131282944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-07DOI: 10.47566/2022_syv35_1-220407
C. Hernandez-Aguilar, Maria del Carmen Valderrama-Bravo, A. Dominguez-Pacheco, Raul Romero-Galindo, Otoniel Igno-Rosario, Eder Contreras-Gallegos, Rumen Ivanov Tsonchev, A. Cruz-Orea
En esta investigación se planteó como objetivo caracterizar color, textura y calidad sanitaria de pan adicionado con maíz criollo y cúrcuma. Se realizaron 14 diferentes panes empleando seis tipos de maíces (M1, M2, M3, M4, M5 y M6). Los principales hallazgos fueron a) El color de los maíces, harinas nixtamalizada y masas tuvieron diferencia significativa (p < 0.05) al comparar valores medios de parámetros de Luminosidad, a* y b*. Los maíces azules y rojizo M2 (37.01), M3 (44.06) y M6 (41.07) y, amarillos y amarillo-naranja M1 (21.26), M4 (15.92) y M5 (26.01) presentaron los valores inferiores en L* y superiores en b*, respectivamente. La menor diferencia en color ?E encontrada en el proceso de transformación de maíz a harina y masa, fue para maíces amarillos. b) En el pan de maíz se encontraron diferencias significativas en variable a* al compararse el mismo tipo de pan durante tres días consecutivos, en los panes BM1, BM5 y BM6, con una disminución de 7.5, 2.6 y 16.9%, con respecto al primer día. c) La calidad sanitaria del pan de trigo mejora con la adición de maíz nixtamalizado y cúrcuma. En los panes adicionados de maíz los que presentaron menor cantidad de colonias de hongos fueron los maíces azules y rojo (M2, M3 y M6). d) La dureza del pan de maíz criollo y cúrcuma no presentó diferencias durante tres días consecutivos beneficiando su conservación. El pan de maíz amarillo y cúrcuma BM1-C mostró incrementos en la dureza en los días 2 y 3.
{"title":"Caracterización colorimétrica, textura y calidad sanitaria de panes adicionados con maíces criollos y Curcuma longa","authors":"C. Hernandez-Aguilar, Maria del Carmen Valderrama-Bravo, A. Dominguez-Pacheco, Raul Romero-Galindo, Otoniel Igno-Rosario, Eder Contreras-Gallegos, Rumen Ivanov Tsonchev, A. Cruz-Orea","doi":"10.47566/2022_syv35_1-220407","DOIUrl":"https://doi.org/10.47566/2022_syv35_1-220407","url":null,"abstract":"En esta investigación se planteó como objetivo caracterizar color, textura y calidad sanitaria de pan adicionado con maíz criollo y cúrcuma. Se realizaron 14 diferentes panes empleando seis tipos de maíces (M1, M2, M3, M4, M5 y M6). Los principales hallazgos fueron a) El color de los maíces, harinas nixtamalizada y masas tuvieron diferencia significativa (p < 0.05) al comparar valores medios de parámetros de Luminosidad, a* y b*. Los maíces azules y rojizo M2 (37.01), M3 (44.06) y M6 (41.07) y, amarillos y amarillo-naranja M1 (21.26), M4 (15.92) y M5 (26.01) presentaron los valores inferiores en L* y superiores en b*, respectivamente. La menor diferencia en color ?E encontrada en el proceso de transformación de maíz a harina y masa, fue para maíces amarillos. b) En el pan de maíz se encontraron diferencias significativas en variable a* al compararse el mismo tipo de pan durante tres días consecutivos, en los panes BM1, BM5 y BM6, con una disminución de 7.5, 2.6 y 16.9%, con respecto al primer día. c) La calidad sanitaria del pan de trigo mejora con la adición de maíz nixtamalizado y cúrcuma. En los panes adicionados de maíz los que presentaron menor cantidad de colonias de hongos fueron los maíces azules y rojo (M2, M3 y M6). d) La dureza del pan de maíz criollo y cúrcuma no presentó diferencias durante tres días consecutivos beneficiando su conservación. El pan de maíz amarillo y cúrcuma BM1-C mostró incrementos en la dureza en los días 2 y 3.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130310195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-16DOI: 10.47566/2021_syv34_1-211201
G. Vázquez Bautista, M. Zapata Torres, F. Chalé-Lara, M. Meléndez Lira, E. Hernández Rodríguez, E. Valaguez Velázquez
Amber is a fossilized natural resin found in specific areas of the world; its geographical origin is associated to a characteristic color. Amber all over the world share basic characteristics due to a common polymeric matrix; however, its color is associated to the environment where it was formed. In this work, based on a compositional analysis, it is proposed that yellow color of Mexican amber is originated from the sulfur physical and chemical interaction within its polymeric matrix. The effect of sulfur present in yellow Mexican amber is studied by employing X-ray photoelectron and UV-Vis spectroscopies. Results show that sulfur is incorporated inside the polymer matrix with two different chemical environments; one related with sulfur-carbon bonds and the other with sulfur-sulfur bonds. The optical transmission spectrum simulated considering amber as a composite material reproduce the scattering contribution observed experimentally.
{"title":"Is sulfur the responsible for color of yellow Chiapas Amber?","authors":"G. Vázquez Bautista, M. Zapata Torres, F. Chalé-Lara, M. Meléndez Lira, E. Hernández Rodríguez, E. Valaguez Velázquez","doi":"10.47566/2021_syv34_1-211201","DOIUrl":"https://doi.org/10.47566/2021_syv34_1-211201","url":null,"abstract":"Amber is a fossilized natural resin found in specific areas of the world; its geographical origin is associated to a characteristic color. Amber all over the world share basic characteristics due to a common polymeric matrix; however, its color is associated to the environment where it was formed. In this work, based on a compositional analysis, it is proposed that yellow color of Mexican amber is originated from the sulfur physical and chemical interaction within its polymeric matrix. The effect of sulfur present in yellow Mexican amber is studied by employing X-ray photoelectron and UV-Vis spectroscopies. Results show that sulfur is incorporated inside the polymer matrix with two different chemical environments; one related with sulfur-carbon bonds and the other with sulfur-sulfur bonds. The optical transmission spectrum simulated considering amber as a composite material reproduce the scattering contribution observed experimentally.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126942328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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