Mazin M. Alalousi, Jamal M. Rzaij, I. Ibrahim, A. Ramizy, M. H. Eisa
Titanium dioxide and gold nanoparticles were synthesized using an environmentally friendly method to deposit undoped and Au-doped TiO2 thin films on silicon and glass substrates via the spray pyrolysis technique. The effect of the Au nanoparticles concentrations on structural, morphological, and hydrogen sulfide (H2S) gas sensing characteristics of TiO2 thin films were investigated. An X-ray diffraction pattern confirmed the polycrystalline structure of the films deposited on glass and Si substrates with a dominant rutile phase and the formation of additional mixed-phases of Ti-Au bonding. According to a Field Emission-Scanning Electron Microscopy investigation, the cluster size ranged from 20 to 180 nm depending on the concentration of AuNPs. The sensing response of the prepared films was tested against H2S at different operating temperatures. The effect of growing a mixture of titanium-gold phases as a suitable catalyst for hydrogen sulfide sensitivity is also discussed.
{"title":"Sensing Enhancement of Gold Nanoparticles Doped-TiO2 Thin Films as H2S Gas Sensor","authors":"Mazin M. Alalousi, Jamal M. Rzaij, I. Ibrahim, A. Ramizy, M. H. Eisa","doi":"10.4028/p-05yh45","DOIUrl":"https://doi.org/10.4028/p-05yh45","url":null,"abstract":"Titanium dioxide and gold nanoparticles were synthesized using an environmentally friendly method to deposit undoped and Au-doped TiO2 thin films on silicon and glass substrates via the spray pyrolysis technique. The effect of the Au nanoparticles concentrations on structural, morphological, and hydrogen sulfide (H2S) gas sensing characteristics of TiO2 thin films were investigated. An X-ray diffraction pattern confirmed the polycrystalline structure of the films deposited on glass and Si substrates with a dominant rutile phase and the formation of additional mixed-phases of Ti-Au bonding. According to a Field Emission-Scanning Electron Microscopy investigation, the cluster size ranged from 20 to 180 nm depending on the concentration of AuNPs. The sensing response of the prepared films was tested against H2S at different operating temperatures. The effect of growing a mixture of titanium-gold phases as a suitable catalyst for hydrogen sulfide sensitivity is also discussed.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"7 1","pages":"1 - 10"},"PeriodicalIF":0.4,"publicationDate":"2022-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87562956","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}
S. Phadkule, K. Navin, Archana Nigrawal, R. Ball, R. Kurchania
Nanocomposite films were prepared with polyvinyl alcohol (PVA) as a base matrix and ZnO, SiO2 nanoparticles as a filler material. SiO2 and ZnO nanoparticles were synthesized using sol-gel and co-precipitation methods, respectively. PVA-ZnO, PVA-SiO2, and PVA-ZnO-SiO2 hybrid nanocomposite films were prepared by a solution film casting method. The presence of ZnO and SiO2 nanoparticles within the films has been confirmed by structural and morphological analysis of the films. Water solubility, water absorption and tensile strength was evaluated for all the films produced. The addition of both types of nanoparticles in the PVA matrix led to a reduction in water absorption in addition to the water solubility capability of the material when compared to the pure PVA film. Addition of nanoparticles resulted in an increase in the tensile strength of the composite films compared to the pure PVA films by 14%, 23%, and 66% for the PVA-ZnO, PVA-SiO2, and PVA-ZnO-SiO2 films respectively. This work provides a simple route to tune the properties of PVA embedded with metal oxide nanoparticles for food packaging and medical applications.
{"title":"Effects of ZnO and SiO2 Nanoparticle Additions on the Structural, Water Absorption and Mechanical Properties of Polyvinyl Alcohol (PVA) Films","authors":"S. Phadkule, K. Navin, Archana Nigrawal, R. Ball, R. Kurchania","doi":"10.4028/p-9y7z3x","DOIUrl":"https://doi.org/10.4028/p-9y7z3x","url":null,"abstract":"Nanocomposite films were prepared with polyvinyl alcohol (PVA) as a base matrix and ZnO, SiO2 nanoparticles as a filler material. SiO2 and ZnO nanoparticles were synthesized using sol-gel and co-precipitation methods, respectively. PVA-ZnO, PVA-SiO2, and PVA-ZnO-SiO2 hybrid nanocomposite films were prepared by a solution film casting method. The presence of ZnO and SiO2 nanoparticles within the films has been confirmed by structural and morphological analysis of the films. Water solubility, water absorption and tensile strength was evaluated for all the films produced. The addition of both types of nanoparticles in the PVA matrix led to a reduction in water absorption in addition to the water solubility capability of the material when compared to the pure PVA film. Addition of nanoparticles resulted in an increase in the tensile strength of the composite films compared to the pure PVA films by 14%, 23%, and 66% for the PVA-ZnO, PVA-SiO2, and PVA-ZnO-SiO2 films respectively. This work provides a simple route to tune the properties of PVA embedded with metal oxide nanoparticles for food packaging and medical applications.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"10 1","pages":"41 - 54"},"PeriodicalIF":0.4,"publicationDate":"2022-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74285872","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}
Silica (SiO2) is a basic raw material that is widely used in optical, ceramics and other industries. Therefore, there is important need to study and improve its optical properties. In this study, silica was extracted and precipitated from maize cob and sodium silicate respectively using simple chemical methods. Silica-silver nanocomposite was produced by hybridization of silica with silver nanoparticles synthesized from plant extract. The source of silica that has been chosen for hybridization is sodium silicate which is effective compared to maize cob. The samples were characterized by UV-Visible, TEM and XRD analyses. UV-Visible results confirmed the presence of silica at 290nm and silver at 425nm. TEM image shows the dispersion of silver within the silica matrixes which gives silica capped silver morphology which is also evidence of hybridization. XRD also confirmed the presence and mixture of silica and silver at 2Ɵ° values between 18.5°-34.5° and 39.5°-65° respectively. The increase in absorbance value of silica before and after hybridization (0.5 to 1.0 respectively) confirms the improvement in optical properties of silica which is an effect of silver in enhancing the optical properties of silica. Therefore, silica-silver nanocomposite can be used for various optical materials.
{"title":"Synthesis and Optical Properties of Silica-Silver Nanocomposite","authors":"I. David, E. O. Dare, Olayinka J. Olaniyan","doi":"10.4028/p-vdn61s","DOIUrl":"https://doi.org/10.4028/p-vdn61s","url":null,"abstract":"Silica (SiO2) is a basic raw material that is widely used in optical, ceramics and other industries. Therefore, there is important need to study and improve its optical properties. In this study, silica was extracted and precipitated from maize cob and sodium silicate respectively using simple chemical methods. Silica-silver nanocomposite was produced by hybridization of silica with silver nanoparticles synthesized from plant extract. The source of silica that has been chosen for hybridization is sodium silicate which is effective compared to maize cob. The samples were characterized by UV-Visible, TEM and XRD analyses. UV-Visible results confirmed the presence of silica at 290nm and silver at 425nm. TEM image shows the dispersion of silver within the silica matrixes which gives silica capped silver morphology which is also evidence of hybridization. XRD also confirmed the presence and mixture of silica and silver at 2Ɵ° values between 18.5°-34.5° and 39.5°-65° respectively. The increase in absorbance value of silica before and after hybridization (0.5 to 1.0 respectively) confirms the improvement in optical properties of silica which is an effect of silver in enhancing the optical properties of silica. Therefore, silica-silver nanocomposite can be used for various optical materials.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"180 1","pages":"33 - 40"},"PeriodicalIF":0.4,"publicationDate":"2022-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80136790","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}
In this study, the water hyacinth was used as a reinforcement of green composites. The chemicals for treatment of water hyacinth were solutions of alkaline, soap and water to determine water absorption. The chemical treated process of the water hyacinth fibers had important influences to the chemical structures and mechanical properties of the green composites. Micrographs analyses of scanning electron microscope (SEM) showed obviously roughness of fiber surface after the chemical treatment as well as arrangement of structures among the water hyacinth fibers. Similarly, the results of analysis by Fourier transform infrared spectroscopy (FT-IR) showed that most of the intensity of the absorbed peaks was decreased markedly at the wavenumbers of 1375 cm-1 and 1542 cm-1. These are related to lignin extraction with alkaline solution, effectively. In particular, the compressive strength of the water hyacinth/roving composite has high value approximately to that of fiberglass composites (unfriendly composites). The water hyacinth/roving composites have significantly improvements in flexural and compressive strengths and this proves that the environmentally friendly composite responded to high requirements for various applications.
{"title":"Treatment of Water Hyacinth Fibers to Improve Mechanical and Microstructural Properties of Green Composite Materials","authors":"Hoc Thang Nguyen, T. H. Nguyen","doi":"10.4028/p-30xboe","DOIUrl":"https://doi.org/10.4028/p-30xboe","url":null,"abstract":"In this study, the water hyacinth was used as a reinforcement of green composites. The chemicals for treatment of water hyacinth were solutions of alkaline, soap and water to determine water absorption. The chemical treated process of the water hyacinth fibers had important influences to the chemical structures and mechanical properties of the green composites. Micrographs analyses of scanning electron microscope (SEM) showed obviously roughness of fiber surface after the chemical treatment as well as arrangement of structures among the water hyacinth fibers. Similarly, the results of analysis by Fourier transform infrared spectroscopy (FT-IR) showed that most of the intensity of the absorbed peaks was decreased markedly at the wavenumbers of 1375 cm-1 and 1542 cm-1. These are related to lignin extraction with alkaline solution, effectively. In particular, the compressive strength of the water hyacinth/roving composite has high value approximately to that of fiberglass composites (unfriendly composites). The water hyacinth/roving composites have significantly improvements in flexural and compressive strengths and this proves that the environmentally friendly composite responded to high requirements for various applications.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"33 1","pages":"111 - 122"},"PeriodicalIF":0.4,"publicationDate":"2022-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89380595","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}
N. Kiratzis, Andreas Barbatsis, Nikolaos Kosmarikos, A. Bisbas, C. Matsouka, L. Nalbandian
Solution Spray Pyrolysis (SST) was successfully implemented to fabricate thin perovskite and fluorite films on dense Yttria Stabilized Zirconia (YSZ) and Lanthanum Strontium Ferrate (LSF70) substrates. These composite structures are ubiquitous in solid oxide fuel cells and electrolyzers, CO gas sensors and ceramic membranes. With this technique, successful in situ manipulation of the film’s functional characteristics such as porosity and thickness is easily achieved by adjusting its functional parameters.In the present contribution, we report on the optimization of the physicochemical parameters of this open atmosphere technique with respect to the substrate temperature and deposition time for the fabrication of films of suitable morphology. Sintered films were characterized by XRD and SEM while thermal analysis was performed on the precursor salts. In addition, AC Impedance analysis was performed on some CGO films in order to assess their electron blocking capability in contact with the LSF substrates.
{"title":"Fabrication of Fluorite and Perovskite Functional Films by Solution Spray Pyrolysis","authors":"N. Kiratzis, Andreas Barbatsis, Nikolaos Kosmarikos, A. Bisbas, C. Matsouka, L. Nalbandian","doi":"10.4028/p-fmd63b","DOIUrl":"https://doi.org/10.4028/p-fmd63b","url":null,"abstract":"Solution Spray Pyrolysis (SST) was successfully implemented to fabricate thin perovskite and fluorite films on dense Yttria Stabilized Zirconia (YSZ) and Lanthanum Strontium Ferrate (LSF70) substrates. These composite structures are ubiquitous in solid oxide fuel cells and electrolyzers, CO gas sensors and ceramic membranes. With this technique, successful in situ manipulation of the film’s functional characteristics such as porosity and thickness is easily achieved by adjusting its functional parameters.In the present contribution, we report on the optimization of the physicochemical parameters of this open atmosphere technique with respect to the substrate temperature and deposition time for the fabrication of films of suitable morphology. Sintered films were characterized by XRD and SEM while thermal analysis was performed on the precursor salts. In addition, AC Impedance analysis was performed on some CGO films in order to assess their electron blocking capability in contact with the LSF substrates.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"53 1","pages":"47 - 52"},"PeriodicalIF":0.4,"publicationDate":"2022-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76483991","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}
All-solid-state battery is a promising next-generation energy storage and conversion device and the development of solid electrolyte is very important as the core of all solid-state batteries. Herein lithium-indium chloride solid electrolyte is successfully prepared and the ionic conductivity is increased from 1.07 to 1.41 mS/cm by optimizing the vacuum parameter in the process of preparation. The samples have typical C2/m space group of cubic crystal system, and the vacuum optimized sample has more regular ion arrangement, better crystallinity and fewer lattice defects. The prepared sample is used as the electrolyte layer and the electrolyte part of the composite cathode, and the layered oxide LiNi0.6Co0.2Mn0.2O2 without surface modification was used as the active material. After assembling the cell, the initial discharge specific capacity of the cell was tested to be 157.5mAh/g. In addition, the phase transition of the composite cathode is analyzed under different charge and discharge state. It is found that the use of the lithium-indium chloride solid electrolyte in composite electrode does not affect the REDOX reaction of LiNi0.6Co0.2Mn0.2O2 layered oxide, indicating that the electrolyte material is stable and compatible with layered cathode material, showing its excellent application prospect.
{"title":"Optimized Lithium-Indium Chloride Solid Electrolyte for High Energy All-Solid-State Batteries","authors":"Guoping Xu","doi":"10.4028/p-xk5392","DOIUrl":"https://doi.org/10.4028/p-xk5392","url":null,"abstract":"All-solid-state battery is a promising next-generation energy storage and conversion device and the development of solid electrolyte is very important as the core of all solid-state batteries. Herein lithium-indium chloride solid electrolyte is successfully prepared and the ionic conductivity is increased from 1.07 to 1.41 mS/cm by optimizing the vacuum parameter in the process of preparation. The samples have typical C2/m space group of cubic crystal system, and the vacuum optimized sample has more regular ion arrangement, better crystallinity and fewer lattice defects. The prepared sample is used as the electrolyte layer and the electrolyte part of the composite cathode, and the layered oxide LiNi0.6Co0.2Mn0.2O2 without surface modification was used as the active material. After assembling the cell, the initial discharge specific capacity of the cell was tested to be 157.5mAh/g. In addition, the phase transition of the composite cathode is analyzed under different charge and discharge state. It is found that the use of the lithium-indium chloride solid electrolyte in composite electrode does not affect the REDOX reaction of LiNi0.6Co0.2Mn0.2O2 layered oxide, indicating that the electrolyte material is stable and compatible with layered cathode material, showing its excellent application prospect.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"15 1","pages":"3 - 8"},"PeriodicalIF":0.4,"publicationDate":"2022-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89293369","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}
Ti-based composites with advanced properties were fabricated by the explosion of the wires and magnetic-pulsed compaction methods. After the wire explosion the “metal core – oxide (or nitride) shell” structure is formed. Magnetic-pulsed treatment of such poorly conductive powder leads to the destruction of the shells and to the appearance of an electrical conductivity. This conductivity is only 4-7 times higher than that of pure titanium. As a result of the dynamic compaction of 100-150 nm powder the hot-pressed Ti+9TiO2 composition appeared to have the best combination of mechanical properties: relative density – 95 %, microhardness - 4.2 GPa, reduced modulus of elasticity – 143 GPa, creep under constant load – 105 nm. The coefficients of thermal extension of three materials with different titanium oxide content: 6, 9 and 15 wt. % were measured. The nitride-containing composites were ~30% more porous and had low mechanical properties compared to Ti+TiO2 compacts.
{"title":"Synthesis of Titanium-Based Composites by Pulsed Methods","authors":"A. Kaygorodov, Sergey Vladimirovich Zayats","doi":"10.4028/p-r3v8k2","DOIUrl":"https://doi.org/10.4028/p-r3v8k2","url":null,"abstract":"Ti-based composites with advanced properties were fabricated by the explosion of the wires and magnetic-pulsed compaction methods. After the wire explosion the “metal core – oxide (or nitride) shell” structure is formed. Magnetic-pulsed treatment of such poorly conductive powder leads to the destruction of the shells and to the appearance of an electrical conductivity. This conductivity is only 4-7 times higher than that of pure titanium. As a result of the dynamic compaction of 100-150 nm powder the hot-pressed Ti+9TiO2 composition appeared to have the best combination of mechanical properties: relative density – 95 %, microhardness - 4.2 GPa, reduced modulus of elasticity – 143 GPa, creep under constant load – 105 nm. The coefficients of thermal extension of three materials with different titanium oxide content: 6, 9 and 15 wt. % were measured. The nitride-containing composites were ~30% more porous and had low mechanical properties compared to Ti+TiO2 compacts.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"49 1","pages":"17 - 22"},"PeriodicalIF":0.4,"publicationDate":"2022-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81508153","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}
Silicon-based materials are significant candidates for electronic and optoelectronic applications because of their high electron and hole mobility. Si1-xGex, Si1-xSnx and Ge1-xSnx are currently hot materials in the field of fabricanting silicon-based light-emitting sources. At present, GeSn has been experimentally proved to have a direct band gap structure and achieve photoluminescence. But the more practical electroluminescence has not been realized. There are two reasons of these: one is the cost of experiment is high, which makes it impossible to conduct a comprehensive and in-depth study on these materials; Additionally, the variational laws of the lattice constants have not been reported due to the lack of theoretical and experimental data. In this paper, the lattice constants and bowing factor of Si1-xGex, Si1-xSnx and Ge1-xSnx have been studied by the first-principles method based on density functional theory (DFT) combined with the Special Quasirandom Structures (SQS) and hybrid function of Heyd-Scuseria-Ernzerhof (HSE) functional correction. Comparing the calculated data with the reported theoretical and experimental data, the results show our method is more accurate. In addition, the lattice constant fitting formulas of Si1-xGex, Si1-xSnx and Ge1-xSnx are given, it shows Si1-xSnx can reduce the lattice mismatch when Si1-xSnx as the buffer between Si and GeSn alloy.
{"title":"First-Principal Investigation of Lattice Constants of Si1-xGex, Si1-xSnx and Ge1-xSnx","authors":"Shengdong Sun, Li Zhang, Wenqi Huang, Zhenying Chen, Hao Wang, Chunguang Zhang","doi":"10.4028/p-uk1s72","DOIUrl":"https://doi.org/10.4028/p-uk1s72","url":null,"abstract":"Silicon-based materials are significant candidates for electronic and optoelectronic applications because of their high electron and hole mobility. Si1-xGex, Si1-xSnx and Ge1-xSnx are currently hot materials in the field of fabricanting silicon-based light-emitting sources. At present, GeSn has been experimentally proved to have a direct band gap structure and achieve photoluminescence. But the more practical electroluminescence has not been realized. There are two reasons of these: one is the cost of experiment is high, which makes it impossible to conduct a comprehensive and in-depth study on these materials; Additionally, the variational laws of the lattice constants have not been reported due to the lack of theoretical and experimental data. In this paper, the lattice constants and bowing factor of Si1-xGex, Si1-xSnx and Ge1-xSnx have been studied by the first-principles method based on density functional theory (DFT) combined with the Special Quasirandom Structures (SQS) and hybrid function of Heyd-Scuseria-Ernzerhof (HSE) functional correction. Comparing the calculated data with the reported theoretical and experimental data, the results show our method is more accurate. In addition, the lattice constant fitting formulas of Si1-xGex, Si1-xSnx and Ge1-xSnx are given, it shows Si1-xSnx can reduce the lattice mismatch when Si1-xSnx as the buffer between Si and GeSn alloy.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"33 1","pages":"77 - 82"},"PeriodicalIF":0.4,"publicationDate":"2022-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90721395","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}
Group-IV SiGeSn ternary alloy is a hot spot in the field of fabricating high-efficient Si-based light source due to its large lattice constant and bandgap variation range. However, due to the high cost and low speed of experimental and computational research, it is difficult to obtain their lattice constants comprehensively and quickly. Machine learning prediction based on statistics is an advanced method to solve this problem. In this paper, based on the existing data of group IV alloys, three machine learning methods such as Random Forest (RF), Support Vector Regression (SVR) and Gradient Boosting Decision Tree (GBDT) have been built to predict the lattice constants of SiGeSn. Firstly, the lattice constants of Group-IV alloys are collected to construct data set; Then, the data set are used to train the machine learning models which describe the quantitative relationship between concentrations and lattice constants; Finally, the prediction performance of these models are compared with each other, and the concentrations with appropriate lattice constants are predicted. The results show the comprehensive performance of SVR model is better than the other two, which means the SVR model can be used to directly predict the lattice constants of SiGeSn.
{"title":"The Investigation of Lattice Properties for Group-IV Sigesn Ternary Alloy: By Using Machine Learning Method","authors":"Li Zhang, Shengying Sun, Wenqi Huang, Zhenji Chen, Hao Wang, Chunguang Zhang","doi":"10.4028/p-o9669j","DOIUrl":"https://doi.org/10.4028/p-o9669j","url":null,"abstract":"Group-IV SiGeSn ternary alloy is a hot spot in the field of fabricating high-efficient Si-based light source due to its large lattice constant and bandgap variation range. However, due to the high cost and low speed of experimental and computational research, it is difficult to obtain their lattice constants comprehensively and quickly. Machine learning prediction based on statistics is an advanced method to solve this problem. In this paper, based on the existing data of group IV alloys, three machine learning methods such as Random Forest (RF), Support Vector Regression (SVR) and Gradient Boosting Decision Tree (GBDT) have been built to predict the lattice constants of SiGeSn. Firstly, the lattice constants of Group-IV alloys are collected to construct data set; Then, the data set are used to train the machine learning models which describe the quantitative relationship between concentrations and lattice constants; Finally, the prediction performance of these models are compared with each other, and the concentrations with appropriate lattice constants are predicted. The results show the comprehensive performance of SVR model is better than the other two, which means the SVR model can be used to directly predict the lattice constants of SiGeSn.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"34 1","pages":"83 - 88"},"PeriodicalIF":0.4,"publicationDate":"2022-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83627082","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}
Chuan Xue Yang, Yi Fan Zhang, Qiong Ying Wu, Wenjun Le
Stimulus-response nanomaterials holds great potential in applications such as drug delivery, disease diagnosis and treatment, and tissue engineering. These nanomaterials can be intelligently controlled via dissolution or transformation upon exposure to stimuli such as enzymes, temperature, light, humidity, pH, etc. In this review, we summarize different stimulus-response groups, building units of smart nanomaterials, synthesis methods, and application prospects of intelligent nanomaterials. Our aim is to arouse broader research interest in smart nanomaterials in the biomedical field to develop more intelligent and controllable nanomaterials and realize precise nanomedicine.
{"title":"Controllable Modification and Synthesis of Intelligent Nanomaterials: A Brief Review","authors":"Chuan Xue Yang, Yi Fan Zhang, Qiong Ying Wu, Wenjun Le","doi":"10.4028/p-rkzu2o","DOIUrl":"https://doi.org/10.4028/p-rkzu2o","url":null,"abstract":"Stimulus-response nanomaterials holds great potential in applications such as drug delivery, disease diagnosis and treatment, and tissue engineering. These nanomaterials can be intelligently controlled via dissolution or transformation upon exposure to stimuli such as enzymes, temperature, light, humidity, pH, etc. In this review, we summarize different stimulus-response groups, building units of smart nanomaterials, synthesis methods, and application prospects of intelligent nanomaterials. Our aim is to arouse broader research interest in smart nanomaterials in the biomedical field to develop more intelligent and controllable nanomaterials and realize precise nanomedicine.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"16 1","pages":"53 - 60"},"PeriodicalIF":0.4,"publicationDate":"2022-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82172151","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：