Pub Date : 2022-12-26DOI: 10.55713/jmmm.v32i4.1549
Riva Alkarsifi, J. Ackermann, O. Margeat
Thanks to huge research efforts, organic solar cells have become serious candidates in the field of renewable energy sources, with reported power conversion efficiencies above 19% and operating lifetime surpassing decades. In the thin film stack composing the organic solar cell, the transport layers at interfaces play a key role, as important as the photoactive material itself. Both electron (ETL) and hole (HTL) transport layers are indeed directly involved in the efficiency and stability of the devices, due to the very specific properties required for these interfaces. Focusing on the HTL interface, a large number of materials has been used in organic solar cells, such as 2D materials, conductive polymers or transition metal oxides. In this review, we present the evolution and recent advances in HTL materials that have been employed in manufacturing organic solar cells, by describing their properties and deposition processes, and also relating their use with the fullerene or the new non-fullerene acceptors in the active layer.
{"title":"Hole transport layers in organic solar cells: A review","authors":"Riva Alkarsifi, J. Ackermann, O. Margeat","doi":"10.55713/jmmm.v32i4.1549","DOIUrl":"https://doi.org/10.55713/jmmm.v32i4.1549","url":null,"abstract":"Thanks to huge research efforts, organic solar cells have become serious candidates in the field of renewable energy sources, with reported power conversion efficiencies above 19% and operating lifetime surpassing decades. In the thin film stack composing the organic solar cell, the transport layers at interfaces play a key role, as important as the photoactive material itself. Both electron (ETL) and hole (HTL) transport layers are indeed directly involved in the efficiency and stability of the devices, due to the very specific properties required for these interfaces. Focusing on the HTL interface, a large number of materials has been used in organic solar cells, such as 2D materials, conductive polymers or transition metal oxides. In this review, we present the evolution and recent advances in HTL materials that have been employed in manufacturing organic solar cells, by describing their properties and deposition processes, and also relating their use with the fullerene or the new non-fullerene acceptors in the active layer.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"31 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74419590","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}
Rubber tree bark (RTB) is a biomass that consists of wood and rubber parts, with high volatile and ash contents. This research reports the utilization of RTB as a carbon source in Electric Arc Furnace steelmaking processes. RTB was mixed with coal at a ratio of 1:1 by weight, and heated at 1000℃ under an argon atmosphere for 1 h. The chars were brought to contact with Electric Arc Furnace slag (37.86 wt% Fe2O3) at 1550℃ for 15 min to investigate their interaction and compared to coal. Coal showed short slag foaming behavior with a foaming time of 4 min, while complete FeO reduction was seen thereafter with the DOM of 65.14%. For RTB, slag foaming sustains over 15 min, but small extent of FeO reduction was observed with the DOM of 42.57%. For the Mixture, foaming time was 8 min, while iron droplets were seen since 8 min with the DOM of 54.63%. It was likely that interaction between the mixture and slag was due to the synergistic effect between coal and RTB. This research unlocks the potential of using RTB biomass for steelmaking process and the consumption of coal could be deducted by up to 50 wt%.
{"title":"Utilization of rubber tree bark as a carbon source for electric arc furnace steelmaking: Carbon/slag interaction at 1550℃","authors":"Wasutha Bandityaruck, Weerayut Srichaisiriwaech, Somyote Kongkarat","doi":"10.55713/jmmm.v32i4.1539","DOIUrl":"https://doi.org/10.55713/jmmm.v32i4.1539","url":null,"abstract":"Rubber tree bark (RTB) is a biomass that consists of wood and rubber parts, with high volatile and ash contents. This research reports the utilization of RTB as a carbon source in Electric Arc Furnace steelmaking processes. RTB was mixed with coal at a ratio of 1:1 by weight, and heated at 1000℃ under an argon atmosphere for 1 h. The chars were brought to contact with Electric Arc Furnace slag (37.86 wt% Fe2O3) at 1550℃ for 15 min to investigate their interaction and compared to coal. Coal showed short slag foaming behavior with a foaming time of 4 min, while complete FeO reduction was seen thereafter with the DOM of 65.14%. For RTB, slag foaming sustains over 15 min, but small extent of FeO reduction was observed with the DOM of 42.57%. For the Mixture, foaming time was 8 min, while iron droplets were seen since 8 min with the DOM of 54.63%. It was likely that interaction between the mixture and slag was due to the synergistic effect between coal and RTB. This research unlocks the potential of using RTB biomass for steelmaking process and the consumption of coal could be deducted by up to 50 wt%.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"31 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74578774","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 : 2022-12-26DOI: 10.55713/jmmm.v32i4.1528
C. Tan, Z. H. Che Daud, Z. Asus, M. H. Idris, I. Mazali, M. I. Ardani, Mohd Kameil ABDUL HAMID
Spinel structured lithium cobalt manganese tetroxide (LiCoMnO4) which exhibit unrivalled reduction potential of 5.3V (vs. Li0 | Li+) was identified to be one of the potential cathode candidates for next generation lithium-ion batteries offering high voltage output and energy density. The focal point of this article is to holistically review relevant techniques established for the synthesis of LiCoMnO4 compound, particularly solid-state reaction, sol-gel synthesis, flux method and hydrothermal technology. Electrochemical performances of lithium cobalt manganese tetroxide (LiCoMnO4) synthesised via the four distinctive approaches as well as the critical process parameters will be compared and scrutinised. Adversities associated with deoxygenation in the course of synthesis process at high temperature and proposed countermeasure via fluorine-substitution will also be discussed.
{"title":"A holistic review on the synthesis techniques of spinel structured lithium cobalt manganese tetroxide","authors":"C. Tan, Z. H. Che Daud, Z. Asus, M. H. Idris, I. Mazali, M. I. Ardani, Mohd Kameil ABDUL HAMID","doi":"10.55713/jmmm.v32i4.1528","DOIUrl":"https://doi.org/10.55713/jmmm.v32i4.1528","url":null,"abstract":"Spinel structured lithium cobalt manganese tetroxide (LiCoMnO4) which exhibit unrivalled reduction potential of 5.3V (vs. Li0 | Li+) was identified to be one of the potential cathode candidates for next generation lithium-ion batteries offering high voltage output and energy density. The focal point of this article is to holistically review relevant techniques established for the synthesis of LiCoMnO4 compound, particularly solid-state reaction, sol-gel synthesis, flux method and hydrothermal technology. Electrochemical performances of lithium cobalt manganese tetroxide (LiCoMnO4) synthesised via the four distinctive approaches as well as the critical process parameters will be compared and scrutinised. Adversities associated with deoxygenation in the course of synthesis process at high temperature and proposed countermeasure via fluorine-substitution will also be discussed.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"180 S463","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72407521","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 : 2022-12-26DOI: 10.55713/jmmm.v32i4.1538
Anuak Silachai, Suriya Prasomthong
High-strength steel and aluminum alloys are used to manufacture modern vehicles. The objective was to reduce the weight and fuel consumption of the vehicles. In this study the optimum parameters for the friction stir spot welding (FSSW) process between Al6061-T6 aluminum alloy and HSS590 high-strength steel were determined. Response surface methodology based on central composite design (CCD) with three parameters, five levels, and 19 runs was used to conduct experiments and develop mathematical regression models. The three joint parameters were tool speed, welding feed, and dwell time. Analysis of variance was then performed to examine the adequacy of the developed models. Finally, the effects of the process parameters on the mechanical properties were investigated using mathematical models. In addition, the distribution of the chemical composition and fracture characteristics of the joints was examined using scanning electron microscopy (SEM). The investigation found that the optimum welding parameters were a tool speed of 1576 rpm, welding feed rate of 45 mm∙min-1, and dwell time of 10 s. Furthermore, the results confirmed that the mathematical models and experiments were consistent.
{"title":"Optimized parameter of dissimilar joining between Al6061-T6 and height-strength steel with friction stir spot welding process (FSSW)","authors":"Anuak Silachai, Suriya Prasomthong","doi":"10.55713/jmmm.v32i4.1538","DOIUrl":"https://doi.org/10.55713/jmmm.v32i4.1538","url":null,"abstract":"High-strength steel and aluminum alloys are used to manufacture modern vehicles. The objective was to reduce the weight and fuel consumption of the vehicles. In this study the optimum parameters for the friction stir spot welding (FSSW) process between Al6061-T6 aluminum alloy and HSS590 high-strength steel were determined. Response surface methodology based on central composite design (CCD) with three parameters, five levels, and 19 runs was used to conduct experiments and develop mathematical regression models. The three joint parameters were tool speed, welding feed, and dwell time. Analysis of variance was then performed to examine the adequacy of the developed models. Finally, the effects of the process parameters on the mechanical properties were investigated using mathematical models. In addition, the distribution of the chemical composition and fracture characteristics of the joints was examined using scanning electron microscopy (SEM). The investigation found that the optimum welding parameters were a tool speed of 1576 rpm, welding feed rate of 45 mm∙min-1, and dwell time of 10 s. Furthermore, the results confirmed that the mathematical models and experiments were consistent.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"70 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86115761","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 : 2022-12-26DOI: 10.55713/jmmm.v32i4.1535
Nattapong Pinpru, V. Intasanta, Thitirat Charoonsuk, Supharada Khaisaat, Oubonwan Sawanakarn, N. Vittayakorn, Somsak Woramongkolchai
This research aims to reduce production capital costs and added value to natural products. The bio-mulching film was prepared by bacterial cellulose (BC) “Acetobacter xylinum”, extracted from three rotten fruits, grape, coconut, and pineapple under standard tests in the laboratory. The analysis from the FTIR technique confirmed to cellulose molecular vibration of BC films. XRD pattern was matched to structure crystallinity of JCPDS standard file which possessed a high percentage of crystallinity. The SEM micrographs were also revealed the 3D nanofiber network structure. The absorption capability of BC films could highly hold water in its structure. In addition, the mechanical properties of BC films came from rotten coconut, given the highest tensile strength (7.2 ± 1.1 MPa) according to nano-fiber symmetric with its dense structure. Nevertheless, the soil burial testing emphasized BC films could reduce soil temperature and increase moisture content in the soil as well. The biodegradation rate of BC films in 30 days was moderately fair. The BC film from rotten coconut had the slowest biodegradation rate (approximately 22.3 4.2%), applicable to biodegradable mulching film.
{"title":"Preparation of bacterial cellulose film from rotten fruits for mulching film application","authors":"Nattapong Pinpru, V. Intasanta, Thitirat Charoonsuk, Supharada Khaisaat, Oubonwan Sawanakarn, N. Vittayakorn, Somsak Woramongkolchai","doi":"10.55713/jmmm.v32i4.1535","DOIUrl":"https://doi.org/10.55713/jmmm.v32i4.1535","url":null,"abstract":" This research aims to reduce production capital costs and added value to natural products. The bio-mulching film was prepared by bacterial cellulose (BC) “Acetobacter xylinum”, extracted from three rotten fruits, grape, coconut, and pineapple under standard tests in the laboratory. The analysis from the FTIR technique confirmed to cellulose molecular vibration of BC films. XRD pattern was matched to structure crystallinity of JCPDS standard file which possessed a high percentage of crystallinity. The SEM micrographs were also revealed the 3D nanofiber network structure. The absorption capability of BC films could highly hold water in its structure. In addition, the mechanical properties of BC films came from rotten coconut, given the highest tensile strength (7.2 ± 1.1 MPa) according to nano-fiber symmetric with its dense structure. Nevertheless, the soil burial testing emphasized BC films could reduce soil temperature and increase moisture content in the soil as well. The biodegradation rate of BC films in 30 days was moderately fair. The BC film from rotten coconut had the slowest biodegradation rate (approximately 22.3 4.2%), applicable to biodegradable mulching film.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"6 6 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90313720","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}
Large quantities of discarded flowers from religious observances are left at temples and other places of worship, causing global disposal and environmental issues. Recycling and transforming such organic waste into value-added products is one of the most effective and beneficial solutions to the problem. The main goal of this study is to convert the most abundant temple wastes of marigold (Tagetes erecta) flowers into an eco-friendly dyestuff for the textile industry. Our study assessed the suitability of dye extract from garland waste for dyeing hemp fabric and valuated indicators including color strength (K/S) and fastness properties using tannic acid as a bio-mordant. Response surface methodology (RSM) was used for optimization of the dyeing process and evaluation of the interaction effects of various operating parameters. The optimal conditions were determined to be pH of 4.23, dyeing temperature of 99.98°C, and dyeing time of 82.64 min. To validate the optimal conditions identified by RSM, performance evaluations were conducted, including color fastness properties of the dyed hemp fabrics as well as the total color difference after repeated standard washing. These results demonstrate the use of aqueous extract from temple garland waste combined with bio-mordant represents a promising approach for textile dyeing.
{"title":"Extraction of lutein dye from Tagetes erecta garland waste for green dyeing of hemp fabric using response surface methodology","authors":"Pisutsaran Chitichotpanya, Nattaya Vuthiganond, Thitirat Inprasit, Benjamas Klaykruayat, Seranee Srisuk","doi":"10.55713/jmmm.v32i4.1527","DOIUrl":"https://doi.org/10.55713/jmmm.v32i4.1527","url":null,"abstract":"Large quantities of discarded flowers from religious observances are left at temples and other places of worship, causing global disposal and environmental issues. Recycling and transforming such organic waste into value-added products is one of the most effective and beneficial solutions to the problem. The main goal of this study is to convert the most abundant temple wastes of marigold (Tagetes erecta) flowers into an eco-friendly dyestuff for the textile industry. Our study assessed the suitability of dye extract from garland waste for dyeing hemp fabric and valuated indicators including color strength (K/S) and fastness properties using tannic acid as a bio-mordant. Response surface methodology (RSM) was used for optimization of the dyeing process and evaluation of the interaction effects of various operating parameters. The optimal conditions were determined to be pH of 4.23, dyeing temperature of 99.98°C, and dyeing time of 82.64 min. To validate the optimal conditions identified by RSM, performance evaluations were conducted, including color fastness properties of the dyed hemp fabrics as well as the total color difference after repeated standard washing. These results demonstrate the use of aqueous extract from temple garland waste combined with bio-mordant represents a promising approach for textile dyeing.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"16 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81826882","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 : 2022-12-26DOI: 10.55713/jmmm.v32i4.1534
Watcharaporn Thongjoon, K. Aiempanakit, Itsarapong Chuasontia, Chantana Aiempanakit
In this study, nickel oxide (NiO) films were prepared on indium tin oxide (ITO) glass by a chemical bath deposition (CBD) at different nickel sulfate (NiSO4) concentrations. The NiO films were verified for their structural properties with field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) while the optical properties were investigated using a spectrophotometer. Moreover, the NiO films were studied to assess their electrochemical properties by cyclic voltammetry in potassium hydroxide (KOH) electrolyte. The results showed that annealed NiO films exhibited the dominant crystal structure of the (111) plane. Meanwhile, the NiSO4 concentration controlled morphological structure between dense and porous structures. The porous structure of NiO film was produced with the NiSO4 concentration in the range of 0.2 M to 1.0 M and the most porous structure was NiSO4 concentration at 0.8 M with a porosity of 64.56%. The optical contrast was calculated between bleached and colored states which were obtained at a maximum of 51.39% for NiO films at 0.8 NiSO4 concentration. Morphological effects and electrochromic properties were highly consistent. Analysis of the cyclic voltammetry (CV) results revealed that the cyclic stability for the highly porous structure of NiO films was more deteriorating than the less porous films.
{"title":"Morphology and electrochromic property of chemical bath deposited NiO films at different NiSO4 concentration","authors":"Watcharaporn Thongjoon, K. Aiempanakit, Itsarapong Chuasontia, Chantana Aiempanakit","doi":"10.55713/jmmm.v32i4.1534","DOIUrl":"https://doi.org/10.55713/jmmm.v32i4.1534","url":null,"abstract":" In this study, nickel oxide (NiO) films were prepared on indium tin oxide (ITO) glass by a chemical bath deposition (CBD) at different nickel sulfate (NiSO4) concentrations. The NiO films were verified for their structural properties with field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) while the optical properties were investigated using a spectrophotometer. Moreover, the NiO films were studied to assess their electrochemical properties by cyclic voltammetry in potassium hydroxide (KOH) electrolyte. The results showed that annealed NiO films exhibited the dominant crystal structure of the (111) plane. Meanwhile, the NiSO4 concentration controlled morphological structure between dense and porous structures. The porous structure of NiO film was produced with the NiSO4 concentration in the range of 0.2 M to 1.0 M and the most porous structure was NiSO4 concentration at 0.8 M with a porosity of 64.56%. The optical contrast was calculated between bleached and colored states which were obtained at a maximum of 51.39% for NiO films at 0.8 NiSO4 concentration. Morphological effects and electrochromic properties were highly consistent. Analysis of the cyclic voltammetry (CV) results revealed that the cyclic stability for the highly porous structure of NiO films was more deteriorating than the less porous films.\u0000 ","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"11 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75654093","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 : 2022-12-26DOI: 10.55713/jmmm.v32i4.1541
H. Sadabadi, S. Allahkaram, Omid Ghader, P. Rohatgi
This paper presents the results of the study of microcapsules synthesized using a novel hybrid shell of polyureaformaldehyde/SiO2 (PUF/SiO2) and a core of linseed oil. The synthesis was accomplished by facial polymerization combined with sol-gel of TEOS, and urea-formaldehyde resin to form the hybrid shell under optimal process parameters. The microcapsules were embedded in a metal coating using the electrodeposition method. Microcapsules were characterized by scanning electron microscope (SEM, FE-SEM), energy-dispersive spectroscopy (EDS), particle size analyzer (PSA), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The experimental results indicated that the average size of capsules synthesized umder the optimum processing parameters were in the range of 5 µm to 200 µm with a hybrid shell thickness of less than 1 µm. The internal surface of the shell contained more SiO2 compared to the external PUF/SiO2 layer, as indicated by EDS. While the internal surfaces were smooth, the outer surface of the microcapsules were composed of rough branched-like structures of urea-formaldehyde particles. It was shown by thermal analysis that initial decomposition starts at 225℃ which proved excellent thermal stability. Electrodeposition was carried out with the current density of 25 mA∙cm-2 to embed the synthesized microcapsules into the Ni-Co alloy coating, which was investigated by SEM, and corrosion test (OCP, LP) to characterize the corrosion behavior of these potentially self-healing coatings.
{"title":"Synthesis and characterization of hybrid shell microcapsules for anti-corrosion Ni-Co coating","authors":"H. Sadabadi, S. Allahkaram, Omid Ghader, P. Rohatgi","doi":"10.55713/jmmm.v32i4.1541","DOIUrl":"https://doi.org/10.55713/jmmm.v32i4.1541","url":null,"abstract":"This paper presents the results of the study of microcapsules synthesized using a novel hybrid shell of polyureaformaldehyde/SiO2 (PUF/SiO2) and a core of linseed oil. The synthesis was accomplished by facial polymerization combined with sol-gel of TEOS, and urea-formaldehyde resin to form the hybrid shell under optimal process parameters. The microcapsules were embedded in a metal coating using the electrodeposition method. Microcapsules were characterized by scanning electron microscope (SEM, FE-SEM), energy-dispersive spectroscopy (EDS), particle size analyzer (PSA), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The experimental results indicated that the average size of capsules synthesized umder the optimum processing parameters were in the range of 5 µm to 200 µm with a hybrid shell thickness of less than 1 µm. The internal surface of the shell contained more SiO2 compared to the external PUF/SiO2 layer, as indicated by EDS. While the internal surfaces were smooth, the outer surface of the microcapsules were composed of rough branched-like structures of urea-formaldehyde particles. It was shown by thermal analysis that initial decomposition starts at 225℃ which proved excellent thermal stability. Electrodeposition was carried out with the current density of 25 mA∙cm-2 to embed the synthesized microcapsules into the Ni-Co alloy coating, which was investigated by SEM, and corrosion test (OCP, LP) to characterize the corrosion behavior of these potentially self-healing coatings. ","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"3 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84628856","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 : 2022-12-26DOI: 10.55713/jmmm.v32i4.1572
Supannika Boonjamnian, Varunee Sadsri, Voravee P. HOVEN, Piyaporn Na Nongkhai
The traditional agglutination assays especially those based on polystyrene beads have been recognized as convenient tools for disease diagnosis despite their limited detection range and low sensitivity. Unlike other particles namely polystyrene beads, SiO2 and gold nanoparticles having insignificant magnetic properties, magnetic nanoparticles (MNPs) offer unique advantages as their magnetic properties for agglutination methods. In the presence of magnet, not only can they be used to enrich the samples, but also their aggregation can also be induced, providing sensitive and rapid measurements. This work aims to develop MNPs for aggregation-based biomolecular detection. The MNPs were surface-modified with PMAMPC via an in situ coating method, then biotin as the target-specific probe was immobilized. The biotin-conjugated PMAMPC-MNPs were used for capturing and detecting the complementary protein, streptavidin in human serum samples. With the magnetic-induction, the nanoparticles would aggregate in the presence of streptavidin, resulting in a short detection time even in undiluted human serum. The concentration range for the detection was 35 nM to 150 nM and the lowest concentration of detection was 35 nM or equivalent to 2.5 mg⸳mL-1. The fact that this is simple, rapid and instrument-free method for biomolecular detection broadens their potential use in a variety of diagnostic applications.
{"title":"Magnetic nanoparticles coated with zwitterionic copolymer as an advanced material for rapid and instrument-free biomolecular detection in human serum","authors":"Supannika Boonjamnian, Varunee Sadsri, Voravee P. HOVEN, Piyaporn Na Nongkhai","doi":"10.55713/jmmm.v32i4.1572","DOIUrl":"https://doi.org/10.55713/jmmm.v32i4.1572","url":null,"abstract":"The traditional agglutination assays especially those based on polystyrene beads have been recognized as convenient tools for disease diagnosis despite their limited detection range and low sensitivity. Unlike other particles namely polystyrene beads, SiO2 and gold nanoparticles having insignificant magnetic properties, magnetic nanoparticles (MNPs) offer unique advantages as their magnetic properties for agglutination methods. In the presence of magnet, not only can they be used to enrich the samples, but also their aggregation can also be induced, providing sensitive and rapid measurements. This work aims to develop MNPs for aggregation-based biomolecular detection. The MNPs were surface-modified with PMAMPC via an in situ coating method, then biotin as the target-specific probe was immobilized. The biotin-conjugated PMAMPC-MNPs were used for capturing and detecting the complementary protein, streptavidin in human serum samples. With the magnetic-induction, the nanoparticles would aggregate in the presence of streptavidin, resulting in a short detection time even in undiluted human serum. The concentration range for the detection was 35 nM to 150 nM and the lowest concentration of detection was 35 nM or equivalent to 2.5 mg⸳mL-1. The fact that this is simple, rapid and instrument-free method for biomolecular detection broadens their potential use in a variety of diagnostic applications.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"47 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85842343","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 : 2022-12-26DOI: 10.55713/jmmm.v32i4.1544
Vignesh Nayak Ullal, Shivaramu H T, Aveen K P
Asian countries rely massively on rice to feed and sustain its massive population. For long the staple food has provided nourishment to the masses and the classes. Rice is grown in large quantities in Asian countries. A by-product of its cultivation is its husk. The husk of the rice grain is mainly utilized as a fuel for the boilers in the rice mills. The uncontrolled burnt rice husk referred to as rice husk ash consists majorly of silica. silica is used in a wide variety of commercial and industrial applications. Use of rice husk ash in various products serves to reduce the pollution caused by its pileup in localities especially close to the rice mills. More sustainable and an affordable source of Si would benefit the society rather than disposing rice husk ash in the fields and landfills. This brief review provides insights into the synthesis, applications, and properties of rice husk ash incorporated products either directly in the as received conditions or under modified conditions.
{"title":"Rice husk ash utilization, composition and properties: A brief review","authors":"Vignesh Nayak Ullal, Shivaramu H T, Aveen K P","doi":"10.55713/jmmm.v32i4.1544","DOIUrl":"https://doi.org/10.55713/jmmm.v32i4.1544","url":null,"abstract":"Asian countries rely massively on rice to feed and sustain its massive population. For long the staple food has provided nourishment to the masses and the classes. Rice is grown in large quantities in Asian countries. A by-product of its cultivation is its husk. The husk of the rice grain is mainly utilized as a fuel for the boilers in the rice mills. The uncontrolled burnt rice husk referred to as rice husk ash consists majorly of silica. silica is used in a wide variety of commercial and industrial applications. Use of rice husk ash in various products serves to reduce the pollution caused by its pileup in localities especially close to the rice mills. More sustainable and an affordable source of Si would benefit the society rather than disposing rice husk ash in the fields and landfills. This brief review provides insights into the synthesis, applications, and properties of rice husk ash incorporated products either directly in the as received conditions or under modified conditions.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"192 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85006794","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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