Pub Date : 2024-08-11DOI: 10.1088/2053-1591/ad6afa
Nader Amini, Kazhal Naderi, Abbas Ahmadi, Kambiz Hassanzadeh, Mohammad-Nazir Menbari, Mohammad Abdi, Ebrahim Ghaderi and Mohammad-Rezgar Zarehbin
In this study, the electrochemical properties of aqueous chlorpromazine hydrochloride (CPZ) in the presence of Fe (II) were investigated by cyclic voltammetry at a boron-doped diamond (BDD) electrode. The results showed that an EC′ reaction mechanism occurs, where electrochemically generated CPZ species (cation radical) are reduced by Fe (II) back to the parent CPZ, and Fe (II) is oxidized to Fe (III). The detection limit, sensitivity, and dynamic concentration ranges were 2.8 μM, 0.0188 μA μM−1 and 10–166 μM. Based on the electrochemical results, the interaction of chlorpromazine (CPZ), a widely used antipsychotic tranquillizer, with the allosteric protein, hemoglobin, has been studied. First, four groups of six female rats weighing 400–450 g were selected. The rats were injected with different concentrations of chlorpromazine over a 3-week period, and the concentrations of hemoglobin, methemoglobin, red blood cells (RBCs), and hematocrit (HCT) were analyzed in the blood of each rat. After injection of different concentrations of the drug, the amount of hemoglobin) as a source of Fe (II)) decreased, but the amount of methemoglobin (as a source of Fe (III) increased. In addition, UV spectroscopic measurements in the range of 200–700 nm indicate the conversion of hemoglobin to methemoglobin in chlorpromazine-treated rats compared to the normal sample, and there was a direct relationship between the increasing methemoglobin concentration of chlorpromazine. Furthermore, the amount of RBC and HCT was measured. The results showed that RBC (21.05%–56.52%) and HCT (10.04%–53.19%) decreased. Finally, this study demonstrates a new mechanism for the effects of CPZ on hemoglobin iron in rat blood based on electrochemical results.
本研究在掺硼金刚石（BDD）电极上通过循环伏安法研究了盐酸氯丙嗪（CPZ）水溶液在铁（II）存在下的电化学性质。结果表明发生了 EC′ 反应机制，即电化学生成的 CPZ 物种（阳离子自由基）被 Fe (II) 还原成 CPZ 母体，而 Fe (II) 被氧化成 Fe (III)。检测限、灵敏度和动态浓度范围分别为 2.8 μM、0.0188 μA μM-1 和 10-166 μM。根据电化学结果，研究了氯丙嗪（CPZ）这种广泛使用的抗精神病镇定剂与异构蛋白血红蛋白的相互作用。首先，研究人员选取了四组体重为 400-450 克的六只雌性大鼠。给大鼠注射不同浓度的氯丙嗪，为期 3 周，分析每只大鼠血液中血红蛋白、高铁血红蛋白、红细胞（RBC）和血细胞比容（HCT）的浓度。注射不同浓度的药物后，作为铁（II）来源的血红蛋白量减少，但作为铁（III）来源的高铁血红蛋白量增加。此外，200-700 纳米范围内的紫外光谱测量结果表明，与正常样本相比，氯丙嗪处理的大鼠血红蛋白转化为高铁血红蛋白，而高铁血红蛋白浓度的增加与氯丙嗪有直接关系。此外，还测量了 RBC 和 HCT 的数量。结果显示，RBC（21.05%-56.52%）和 HCT（10.04%-53.19%）均有所下降。最后，本研究根据电化学结果证明了 CPZ 对大鼠血液中血红蛋白铁影响的新机制。
{"title":"Electrochemical oxidation of Fe (II) using chlorpromazine drug at boron-doped diamond electrode: application to in vivo mechanism study interaction of chlorpromazine on hemoglobin iron and evaluation of some biomolecules","authors":"Nader Amini, Kazhal Naderi, Abbas Ahmadi, Kambiz Hassanzadeh, Mohammad-Nazir Menbari, Mohammad Abdi, Ebrahim Ghaderi and Mohammad-Rezgar Zarehbin","doi":"10.1088/2053-1591/ad6afa","DOIUrl":"https://doi.org/10.1088/2053-1591/ad6afa","url":null,"abstract":"In this study, the electrochemical properties of aqueous chlorpromazine hydrochloride (CPZ) in the presence of Fe (II) were investigated by cyclic voltammetry at a boron-doped diamond (BDD) electrode. The results showed that an EC′ reaction mechanism occurs, where electrochemically generated CPZ species (cation radical) are reduced by Fe (II) back to the parent CPZ, and Fe (II) is oxidized to Fe (III). The detection limit, sensitivity, and dynamic concentration ranges were 2.8 μM, 0.0188 μA μM−1 and 10–166 μM. Based on the electrochemical results, the interaction of chlorpromazine (CPZ), a widely used antipsychotic tranquillizer, with the allosteric protein, hemoglobin, has been studied. First, four groups of six female rats weighing 400–450 g were selected. The rats were injected with different concentrations of chlorpromazine over a 3-week period, and the concentrations of hemoglobin, methemoglobin, red blood cells (RBCs), and hematocrit (HCT) were analyzed in the blood of each rat. After injection of different concentrations of the drug, the amount of hemoglobin) as a source of Fe (II)) decreased, but the amount of methemoglobin (as a source of Fe (III) increased. In addition, UV spectroscopic measurements in the range of 200–700 nm indicate the conversion of hemoglobin to methemoglobin in chlorpromazine-treated rats compared to the normal sample, and there was a direct relationship between the increasing methemoglobin concentration of chlorpromazine. Furthermore, the amount of RBC and HCT was measured. The results showed that RBC (21.05%–56.52%) and HCT (10.04%–53.19%) decreased. Finally, this study demonstrates a new mechanism for the effects of CPZ on hemoglobin iron in rat blood based on electrochemical results.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1088/2053-1591/ad6dbc
Tariq Mohiuddin, S. Al-Kamiyani, Tanveer Iqbal, Amal Al Ghaferi
Carbon-based materials are commonly utilized in water filtration and purification due to their affordability and environmental friendliness. This study investigates the effectiveness of four different carbon-based materials: activated carbon (AC), graphene oxide (GO), reduced graphene oxide (rGO), and polyethylene (PE) in crude oil-water separation. To test the effectiveness of the separation, light transmission measurements were carried out with the aid of Arduino UNO using a red, green, and blue (RGB) light spectral sensor. The results revealed that the emulsions with AC was the most effective material in the separation, followed by rGO, and GO was the least effective. To explain the mechanism behind the separation performance, the carbon materials have been characterized by X-ray photoelectron spectroscopy (XPS) and Fourier Transform Infrared Spectroscopy (FTIR). The effectiveness of AC and rGO in the separation process was directly related to the quantity of surface oxides. The experimental results are perfectly agreed with published Density functional theory (DFT) calculations of HOMO-LUMO gap energies. AC shows the best performance and the smallest gap, which indicates that it requires less energy for electrons transition between the HOMO and LUMO. This phenomenon can be attributed to the affinity towards hydrogen in the hydrocarbon chains in crude oil.
碳基材料因其经济实惠和环境友好而常用于水过滤和净化。本研究调查了四种不同的碳基材料：活性炭 (AC)、氧化石墨烯 (GO)、还原氧化石墨烯 (rGO) 和聚乙烯 (PE) 在原油-水分离中的有效性。为了测试分离效果，我们借助 Arduino UNO 使用红、绿、蓝（RGB）光光谱传感器进行了透光率测量。结果显示，含有 AC 的乳液是分离效果最好的材料，其次是 rGO，而 GO 的效果最差。为了解释分离性能背后的机理，我们利用 X 射线光电子能谱（XPS）和傅立叶变换红外光谱（FTIR）对碳材料进行了表征。AC 和 rGO 在分离过程中的有效性与表面氧化物的数量直接相关。实验结果与已发表的密度泛函理论（DFT）计算的 HOMO-LUMO 间隙能完全吻合。AC 的性能最好，间隙最小，这表明它在 HOMO 和 LUMO 之间的电子转换所需的能量较少。这一现象可归因于原油中碳氢链对氢的亲和性。
{"title":"Crude oil-water separation with the aid of carbon based materials","authors":"Tariq Mohiuddin, S. Al-Kamiyani, Tanveer Iqbal, Amal Al Ghaferi","doi":"10.1088/2053-1591/ad6dbc","DOIUrl":"https://doi.org/10.1088/2053-1591/ad6dbc","url":null,"abstract":"\u0000 Carbon-based materials are commonly utilized in water filtration and purification due to their affordability and environmental friendliness. This study investigates the effectiveness of four different carbon-based materials: activated carbon (AC), graphene oxide (GO), reduced graphene oxide (rGO), and polyethylene (PE) in crude oil-water separation. To test the effectiveness of the separation, light transmission measurements were carried out with the aid of Arduino UNO using a red, green, and blue (RGB) light spectral sensor. The results revealed that the emulsions with AC was the most effective material in the separation, followed by rGO, and GO was the least effective. To explain the mechanism behind the separation performance, the carbon materials have been characterized by X-ray photoelectron spectroscopy (XPS) and Fourier Transform Infrared Spectroscopy (FTIR). The effectiveness of AC and rGO in the separation process was directly related to the quantity of surface oxides. The experimental results are perfectly agreed with published Density functional theory (DFT) calculations of HOMO-LUMO gap energies. AC shows the best performance and the smallest gap, which indicates that it requires less energy for electrons transition between the HOMO and LUMO. This phenomenon can be attributed to the affinity towards hydrogen in the hydrocarbon chains in crude oil.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141924349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1088/2053-1591/ad6dba
M. B H, P. S. Shivakumar Gouda, K. M. Dutt, Ramesh M C, Rajesh K, Prashanth B N, Ramesh S, Gajanan Anne
Natural fiber composites are an ecologically beneficial and sustainable alternative to conventional materials, lowering their environmental impact. Aging tests are essential for assessing natural fiber composites' long-term mechanical performance and durability in various environments to ensure their reliability and safety over time. The ecological aging behavior of jutarebanana fiber phenol-formaldehyde (JBP-F) hybrid composites with varying phenol-formaldehyde (PF) weight percentages ranging from 40% to 70% is investigated in this study. The moisture resistance, accelerated water resistance, thermal and hydrothermal aging, soil burial, and accelerated weathering have all been tested on these composites. The degree of deterioration was determined by analyzing changes in the hybrid fiber composite's weight and tensile properties. In moisture resistance and soil burial tests, the composite with 70% PF and 30% fibers by weight exhibited the least weight gain and the least weight loss. According to the experimental results, a composite containing equal quantities of fiber and resin (50% jute-banana fiber and 50% PF) (JBP-F50) showed strong fiber-matrix interaction and was suitable for outdoor applications. This composite experienced minimal weight gain in moisture durability and accelerated water resistance tests, and it exhibited weight loss in thermal aging, hydrothermal aging, soil burial, and accelerated weathering tests. Additionally, it consistently showed higher tensile strength compared to the other composites. (60% jute- banana fiber and 40% PF). The JBP-F60 composite, on the other hand, demonstrated high modulus values in all aging tests except the thermal aging test.
{"title":"The Impact of Ecological Aging on the Mechanical Performance of Jute-Banana Fibre Phenol-Formaldehyde Hybrid Composites","authors":"M. B H, P. S. Shivakumar Gouda, K. M. Dutt, Ramesh M C, Rajesh K, Prashanth B N, Ramesh S, Gajanan Anne","doi":"10.1088/2053-1591/ad6dba","DOIUrl":"https://doi.org/10.1088/2053-1591/ad6dba","url":null,"abstract":"\u0000 Natural fiber composites are an ecologically beneficial and sustainable alternative to conventional materials, lowering their environmental impact. Aging tests are essential for assessing natural fiber composites' long-term mechanical performance and durability in various environments to ensure their reliability and safety over time. The ecological aging behavior of jutarebanana fiber phenol-formaldehyde (JBP-F) hybrid composites with varying phenol-formaldehyde (PF) weight percentages ranging from 40% to 70% is investigated in this study. The moisture resistance, accelerated water resistance, thermal and hydrothermal aging, soil burial, and accelerated weathering have all been tested on these composites. The degree of deterioration was determined by analyzing changes in the hybrid fiber composite's weight and tensile properties. In moisture resistance and soil burial tests, the composite with 70% PF and 30% fibers by weight exhibited the least weight gain and the least weight loss. According to the experimental results, a composite containing equal quantities of fiber and resin (50% jute-banana fiber and 50% PF) (JBP-F50) showed strong fiber-matrix interaction and was suitable for outdoor applications. This composite experienced minimal weight gain in moisture durability and accelerated water resistance tests, and it exhibited weight loss in thermal aging, hydrothermal aging, soil burial, and accelerated weathering tests. Additionally, it consistently showed higher tensile strength compared to the other composites. (60% jute- banana fiber and 40% PF). The JBP-F60 composite, on the other hand, demonstrated high modulus values in all aging tests except the thermal aging test.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141923727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-08DOI: 10.1088/2053-1591/ad6d35
Kang Qi, Long Jiang
Coatings with different boron content were prepared by magnetic field-assisted Co-based laser metal deposition on 300 M ultra-high strength steel. The effects of boron content on the magnetic properties, mechanical properties, friction and wear properties, and corrosion resistance of the coating were investigated. The research results indicate that adding 6 wt% of boron to cobalt alloy in a 35 mT alternating magnetic field is beneficial for refining the microstructure, which can improve the mechanical properties of the coating. This research also discusses the effect of boron content on the wear and corrosion resistance of the coating. The results show that adding boron content enhances the magnetostrictive effect, and reduces the elastic modulus of the laser metal deposition coating while ensuring its hardness, thereby improving the wear and corrosion resistance of the laser metal deposition layer. The hardness of the coating can reach 1215 HV. The friction coefficient and corrosion current density of the coating are reduced by 26.9% and 60.2% respectively compared with the substrate. This work can help promote the application of laser metal deposition technology, reduce costs, and ensure performance.
通过磁场辅助 Co 基激光金属沉积法在 300 M 超高强度钢上制备了不同硼含量的涂层。研究了硼含量对涂层磁性能、机械性能、摩擦磨损性能和耐腐蚀性能的影响。研究结果表明，在 35 mT 交变磁场中向钴合金中添加 6 wt% 的硼有利于细化微观结构，从而改善涂层的机械性能。本研究还讨论了硼含量对涂层耐磨性和耐腐蚀性的影响。结果表明，硼的加入增强了磁致伸缩效应，在保证硬度的同时降低了激光金属沉积涂层的弹性模量，从而提高了激光金属沉积层的耐磨性和耐腐蚀性。涂层硬度可达 1215 HV。与基体相比，涂层的摩擦系数和腐蚀电流密度分别降低了 26.9% 和 60.2%。这项工作有助于促进激光金属沉积技术的应用，降低成本，确保性能。
{"title":"Effects of boron on microstructure, wear and corrosion properties of external magnetic field assisted laser metal deposition coatings","authors":"Kang Qi, Long Jiang","doi":"10.1088/2053-1591/ad6d35","DOIUrl":"https://doi.org/10.1088/2053-1591/ad6d35","url":null,"abstract":"\u0000 Coatings with different boron content were prepared by magnetic field-assisted Co-based laser metal deposition on 300 M ultra-high strength steel. The effects of boron content on the magnetic properties, mechanical properties, friction and wear properties, and corrosion resistance of the coating were investigated. The research results indicate that adding 6 wt% of boron to cobalt alloy in a 35 mT alternating magnetic field is beneficial for refining the microstructure, which can improve the mechanical properties of the coating. This research also discusses the effect of boron content on the wear and corrosion resistance of the coating. The results show that adding boron content enhances the magnetostrictive effect, and reduces the elastic modulus of the laser metal deposition coating while ensuring its hardness, thereby improving the wear and corrosion resistance of the laser metal deposition layer. The hardness of the coating can reach 1215 HV. The friction coefficient and corrosion current density of the coating are reduced by 26.9% and 60.2% respectively compared with the substrate. This work can help promote the application of laser metal deposition technology, reduce costs, and ensure performance.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141927073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-08DOI: 10.1088/2053-1591/ad68cd
Dun Wu, Nan Wang, Jiaming Zhao, Jiaqi Liu, Rudong Zhou, Junfeng Cheng and Chunlin Liu
Hydrogen production via electrocatalytic water splitting is generally considered as an efficient and eco-friendly strategy for energy storage. The exploration of novel electrocatalytic cathode material towards hydrogen evolution reaction (HER) has never ended. Laser induced graphene (LIG), as a cheap and porous material with large surface area, not only can be used as a carrier of active substances for collaborative catalysis towards hydrogen evolution, but also can be directly used as catalytic electrode via heteroatoms doping. We synthesized Fe3O4 embedded LIG via laser ablation of polyimide (PI)/Fe(acac)3 film and tested its HER electrocatalytic performance. An overpotential of 269 mV was obtained under the current density of 10 mA cm−2 with a slight current decay in the 10 h chronoamperometric examination in 1 M KOH electrolyte. This work provides an insight into methods of optimizing electrochemical properties and improving catalytic activity of LIG based materials. The performance of our Fe3O4 embedded LIG demonstrates the potential of LIG based materials as next generation HER electrocatalyst.
人们普遍认为，通过电催化分水制氢是一种高效、环保的储能策略。针对氢进化反应（HER）的新型电催化阴极材料的探索从未停止过。激光诱导石墨烯（LIG）作为一种廉价且比表面积大的多孔材料，不仅可以作为活性物质的载体协同催化氢气进化，还可以通过掺杂杂原子直接用作催化电极。我们通过激光烧蚀聚酰亚胺（PI）/Fe(acac)3 薄膜合成了嵌入 Fe3O4 的 LIG，并测试了其 HER 电催化性能。在 1 M KOH 电解液中，电流密度为 10 mA cm-2 时，过电位为 269 mV，10 h 的计时电流测试中电流略有衰减。这项研究为优化基于 LIG 的材料的电化学特性和提高其催化活性的方法提供了启示。我们的嵌入式 Fe3O4 LIG 的性能证明了基于 LIG 的材料作为下一代 HER 电催化剂的潜力。
{"title":"Synthesis of Fe3O4 embedded LIG via laser ablation of PI/Fe(acac)3 film for enhanced electrocatalytic hydrogen evolution","authors":"Dun Wu, Nan Wang, Jiaming Zhao, Jiaqi Liu, Rudong Zhou, Junfeng Cheng and Chunlin Liu","doi":"10.1088/2053-1591/ad68cd","DOIUrl":"https://doi.org/10.1088/2053-1591/ad68cd","url":null,"abstract":"Hydrogen production via electrocatalytic water splitting is generally considered as an efficient and eco-friendly strategy for energy storage. The exploration of novel electrocatalytic cathode material towards hydrogen evolution reaction (HER) has never ended. Laser induced graphene (LIG), as a cheap and porous material with large surface area, not only can be used as a carrier of active substances for collaborative catalysis towards hydrogen evolution, but also can be directly used as catalytic electrode via heteroatoms doping. We synthesized Fe3O4 embedded LIG via laser ablation of polyimide (PI)/Fe(acac)3 film and tested its HER electrocatalytic performance. An overpotential of 269 mV was obtained under the current density of 10 mA cm−2 with a slight current decay in the 10 h chronoamperometric examination in 1 M KOH electrolyte. This work provides an insight into methods of optimizing electrochemical properties and improving catalytic activity of LIG based materials. The performance of our Fe3O4 embedded LIG demonstrates the potential of LIG based materials as next generation HER electrocatalyst.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141969716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-08DOI: 10.1088/2053-1591/ad6957
Maithili K Rao, Selvaraj Paramasivam, M Selvakumar, M S Santosh, M G Mahesha and S Senthilkumar
This study delves into the intricate dynamics of ligand engineering for the synthesis of Methyl Ammonium Lead Bromide (MAPbBr3) nanocrystals (NCs), which exhibit immense potential in optoelectronic and photovoltaic applications. Our focus centres on the role of the quaternary ammonium molecule CTAB as a ligand in stabilizing MAPbBr3 NCs. This also addresses the challenges related to the stability and surface defects of NCs that hinder their commercial viability. Employing a modified ligand-assisted reprecipitation technique (LARP) with a dual solvent system, we optimized the CTAB concentration to 0.05 mmol, resulting in MAPbBr3 NCs with an impressive 88% quantum yield. XPS and FTIR analyses confirm the presence and binding of CTAB on the NC surface. The MAPbBr3-CTAB NCs exhibit higher exciton–phonon binding energy, enhancing their optical properties. Despite an unfavourable geometric fit, CTAB is effective in surface defect passivation due to its binding, solvation, and desorption energy during the dynamic binding process. 2D-DOSY NMR reveals approximately 66% CTAB bound to the NC surface. A comparative study involving MAPbBr3-OA, OLA, and MAPbBr3-CTAB deposited on LEDs demonstrates the superior performance of the latter, achieving a luminous efficiency of 42.18 lm W−1 at 1.2 ml deposition. These findings highlight the efficacy of CTAB in achieving high-purity green luminescence, aligning with BT.2020 display colour standards and paving the way for advanced optoelectronic applications. The successful synthesis and improved performance of MAPbBr3-CTAB NCs underscore their potential as a promising material for future optoelectronic and photovoltaic technologies.
{"title":"In-situ synthesis of quaternary alkylammonium ligand capped organic-inorganic hybrid halide perovskite for high pure green luminescence in display application","authors":"Maithili K Rao, Selvaraj Paramasivam, M Selvakumar, M S Santosh, M G Mahesha and S Senthilkumar","doi":"10.1088/2053-1591/ad6957","DOIUrl":"https://doi.org/10.1088/2053-1591/ad6957","url":null,"abstract":"This study delves into the intricate dynamics of ligand engineering for the synthesis of Methyl Ammonium Lead Bromide (MAPbBr3) nanocrystals (NCs), which exhibit immense potential in optoelectronic and photovoltaic applications. Our focus centres on the role of the quaternary ammonium molecule CTAB as a ligand in stabilizing MAPbBr3 NCs. This also addresses the challenges related to the stability and surface defects of NCs that hinder their commercial viability. Employing a modified ligand-assisted reprecipitation technique (LARP) with a dual solvent system, we optimized the CTAB concentration to 0.05 mmol, resulting in MAPbBr3 NCs with an impressive 88% quantum yield. XPS and FTIR analyses confirm the presence and binding of CTAB on the NC surface. The MAPbBr3-CTAB NCs exhibit higher exciton–phonon binding energy, enhancing their optical properties. Despite an unfavourable geometric fit, CTAB is effective in surface defect passivation due to its binding, solvation, and desorption energy during the dynamic binding process. 2D-DOSY NMR reveals approximately 66% CTAB bound to the NC surface. A comparative study involving MAPbBr3-OA, OLA, and MAPbBr3-CTAB deposited on LEDs demonstrates the superior performance of the latter, achieving a luminous efficiency of 42.18 lm W−1 at 1.2 ml deposition. These findings highlight the efficacy of CTAB in achieving high-purity green luminescence, aligning with BT.2020 display colour standards and paving the way for advanced optoelectronic applications. The successful synthesis and improved performance of MAPbBr3-CTAB NCs underscore their potential as a promising material for future optoelectronic and photovoltaic technologies.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141947053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-08DOI: 10.1088/2053-1591/ad6d34
Abisha Meji M, U. D, Ashwin B M
Green synthesis techniques have recently become more popular due to the expanding interest in nanotechnology and the need for ecologically friendly synthesis processes. This work examines the environment friendly production of Zinc Oxide Nanoparticles (ZnO NPs) by a microwave-assisted technique, utilizing Pistia Stratiotes leaf extract as a reducing agent. The optical and structural properties of the produced ZnO NPs were analyzed using UV-Vis spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), and X-ray Diffraction (XRD). The findings indicated that the ZnO NPs displayed shapes consisting spherical, flower and sheet, with an average size of 35 nm which was verified by SEM and TEM. The XRD examination confirmed the presence of a hexagonal wurtzite crystalline structure, while the FTIR analysis identified a distinct peak at 578 cm-1, which indicates the stretching mode of Zn-O bonds. The antibacterial and antifungal properties of the substance were evaluated against Staphylococcus Aureus, Escherichia Coli, and Candida Albicans. The results demonstrated notable effectiveness, as indicated by inhibition zones measuring 16-20.4 mm, 17-21.3 mm, and 13-17.2 mm correspondingly. In addition, the ZnO NPs exhibited specific anti-cancer effects on SK-MEL-28 melanoma cell lines, with an IC50 value of 51.05 µg/ml, suggesting potential uses in therapy. This study demonstrates the feasibility of using microwave-assisted green synthesis to create ZnO NPs with favorable characteristics for biomedical purposes, with a particular focus on sustainable manufacturing of nanomaterials. The results indicate that these ZnO NPs show great potential for application in antibacterial, antifungal, and anticancer therapies, leading to developments in the field of medical nanotechnology.
{"title":"Microwave-Assisted Green Synthesis of Zinc Oxide Nanoparticles Using Pistia Stratiotes for Anticancer and Antibacterial Applications","authors":"Abisha Meji M, U. D, Ashwin B M","doi":"10.1088/2053-1591/ad6d34","DOIUrl":"https://doi.org/10.1088/2053-1591/ad6d34","url":null,"abstract":"\u0000 Green synthesis techniques have recently become more popular due to the expanding interest in nanotechnology and the need for ecologically friendly synthesis processes. This work examines the environment friendly production of Zinc Oxide Nanoparticles (ZnO NPs) by a microwave-assisted technique, utilizing Pistia Stratiotes leaf extract as a reducing agent. The optical and structural properties of the produced ZnO NPs were analyzed using UV-Vis spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), and X-ray Diffraction (XRD). The findings indicated that the ZnO NPs displayed shapes consisting spherical, flower and sheet, with an average size of 35 nm which was verified by SEM and TEM. The XRD examination confirmed the presence of a hexagonal wurtzite crystalline structure, while the FTIR analysis identified a distinct peak at 578 cm-1, which indicates the stretching mode of Zn-O bonds. The antibacterial and antifungal properties of the substance were evaluated against Staphylococcus Aureus, Escherichia Coli, and Candida Albicans. The results demonstrated notable effectiveness, as indicated by inhibition zones measuring 16-20.4 mm, 17-21.3 mm, and 13-17.2 mm correspondingly. In addition, the ZnO NPs exhibited specific anti-cancer effects on SK-MEL-28 melanoma cell lines, with an IC50 value of 51.05 µg/ml, suggesting potential uses in therapy. This study demonstrates the feasibility of using microwave-assisted green synthesis to create ZnO NPs with favorable characteristics for biomedical purposes, with a particular focus on sustainable manufacturing of nanomaterials. The results indicate that these ZnO NPs show great potential for application in antibacterial, antifungal, and anticancer therapies, leading to developments in the field of medical nanotechnology.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-08DOI: 10.1088/2053-1591/ad6d36
Chenyang Wang, Fei Xing, Xiangyu Liu, Hongyou Bian, Weijun Liu
Wire-feed laser metal deposition (LMD-W) offers a high deposition rate and low cost, making it an effective solution for reducing costs and enhancing efficiency in manufacturing large-scale titanium aerospace components. Currently, the material used for LMD-W is typically a single alloy wire, which limits the flexibility and functionality of manufacturing composite materials. This work employed a novel concurrent wire-powder feeding laser metal deposition (LMD-WP) process to manufacture TiC/Ti-6Al-4V composite. In the LMD-WP method, Ti-6Al-4V wire was fed laterally, while TiC particles were delivered coaxially. Only 1.0 wt.% TiC particles were added to prevent excessive TiC, which could cause stress concentration and increase crack sensitivity. The microstructure and mechanical properties of Ti-6Al-4V alloy and TiC/Ti-6Al-4V composite were investigated. The results indicate that with coaxial TiC particle addition, the α-Ti in TiC/Ti-6Al-4V is noticeably refined. Additionally, in-situ TiC acts as heterogeneous nucleation sites, restricting α-Ti growth and reducing its aspect ratio. Furthermore, TiC particles weakened the α-Ti texture in the (0001) and (11-20) directions. Moreover, adding TiC particles significantly enhanced tensile strength, with the yield strength reaching 950 MPa and the ultimate tensile strength reaching 1048 MPa. Compared to Ti-6Al-4V alloy fabricated by LMD-W, this represents an increase of 11.25% and 10.72%, respectively. The improvement in tensile properties is principally ascribed to grain boundary strengthening, Orowan strengthening and dislocation density strengthening. This work introduces an innovative approach and abundant data for the additive manufacturing of TiC/Ti-6Al-4V composite with high efficiency and low cost.
{"title":"Microstructure and mechanical property improvement of concurrent wire-powder feeding laser melting deposition Ti-6Al-4V via TiC addition","authors":"Chenyang Wang, Fei Xing, Xiangyu Liu, Hongyou Bian, Weijun Liu","doi":"10.1088/2053-1591/ad6d36","DOIUrl":"https://doi.org/10.1088/2053-1591/ad6d36","url":null,"abstract":"\u0000 Wire-feed laser metal deposition (LMD-W) offers a high deposition rate and low cost, making it an effective solution for reducing costs and enhancing efficiency in manufacturing large-scale titanium aerospace components. Currently, the material used for LMD-W is typically a single alloy wire, which limits the flexibility and functionality of manufacturing composite materials. This work employed a novel concurrent wire-powder feeding laser metal deposition (LMD-WP) process to manufacture TiC/Ti-6Al-4V composite. In the LMD-WP method, Ti-6Al-4V wire was fed laterally, while TiC particles were delivered coaxially. Only 1.0 wt.% TiC particles were added to prevent excessive TiC, which could cause stress concentration and increase crack sensitivity. The microstructure and mechanical properties of Ti-6Al-4V alloy and TiC/Ti-6Al-4V composite were investigated. The results indicate that with coaxial TiC particle addition, the α-Ti in TiC/Ti-6Al-4V is noticeably refined. Additionally, in-situ TiC acts as heterogeneous nucleation sites, restricting α-Ti growth and reducing its aspect ratio. Furthermore, TiC particles weakened the α-Ti texture in the (0001) and (11-20) directions. Moreover, adding TiC particles significantly enhanced tensile strength, with the yield strength reaching 950 MPa and the ultimate tensile strength reaching 1048 MPa. Compared to Ti-6Al-4V alloy fabricated by LMD-W, this represents an increase of 11.25% and 10.72%, respectively. The improvement in tensile properties is principally ascribed to grain boundary strengthening, Orowan strengthening and dislocation density strengthening. This work introduces an innovative approach and abundant data for the additive manufacturing of TiC/Ti-6Al-4V composite with high efficiency and low cost.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141927827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-08DOI: 10.1088/2053-1591/ad6d32
Brianda L. Cruz-Sanchez, J. Díaz-Guillén, Hdz- García, Pedro Perez-Cortes, Antonio F. Fuentes
This study evaluates the impact of incorporating varying contents (10-40 wt%) and molar concentrations (0.001-1M) of citric acid solutions, as transient liquid phases in the Cold Sintering Assisted Sintering (CSAS) process of dysprosium zirconate (Dy2Zr2O7). CSAS processed samples achieved relative densities up to 98% of the theoretical maximum and significantly increased Vickers microhardness by over 2.5 times, compared to the traditional “press and fired” sintering method. The Dy2Zr2O7 crystal structure remained consistent with the fluorite-type, with no secondary phases detected. Our findings underscore the benefits of using CSAS to enhance the mechanical strength of Dy2Zr2O7, while reducing the lengthy processing times at very high temperatures typically required for sintering refractory materials such as lanthanide zirconates.
{"title":"Enhancing Mechanical Properties of Lanthanide Zirconates through the Cold Sintering Assisted Sintering Process","authors":"Brianda L. Cruz-Sanchez, J. Díaz-Guillén, Hdz- García, Pedro Perez-Cortes, Antonio F. Fuentes","doi":"10.1088/2053-1591/ad6d32","DOIUrl":"https://doi.org/10.1088/2053-1591/ad6d32","url":null,"abstract":"\u0000 This study evaluates the impact of incorporating varying contents (10-40 wt%) and molar concentrations (0.001-1M) of citric acid solutions, as transient liquid phases in the Cold Sintering Assisted Sintering (CSAS) process of dysprosium zirconate (Dy2Zr2O7). CSAS processed samples achieved relative densities up to 98% of the theoretical maximum and significantly increased Vickers microhardness by over 2.5 times, compared to the traditional “press and fired” sintering method. The Dy2Zr2O7 crystal structure remained consistent with the fluorite-type, with no secondary phases detected. Our findings underscore the benefits of using CSAS to enhance the mechanical strength of Dy2Zr2O7, while reducing the lengthy processing times at very high temperatures typically required for sintering refractory materials such as lanthanide zirconates.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141926259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-08DOI: 10.1088/2053-1591/ad6d33
Puteri Intan Zulaikha SYED MAHADZIR, M. Mottakin, Muhammad Amirul Aizat Mohd Abdah, Puteri Nor Aznie Fahsyar, K. Jumbri, M. H. Mahyuddin, S. Sepeai, M. A. Mat Teridi, Norasikin Ahmad Ludin, M. Su'ait, Khaja Nazeeruddin
Spiro-OMeTAD is a widely used hole-transporting material (HTM) that plays a crucial role in achieving highly efficient perovskite solar cells (PSCs). In this work, a series of demethylated functionalized spiro-OMeTAD-based derivatives with different numbers of hydroxyl substituted groups (named as SOH2, SOH4, and SOH6) were synthesized, and their thermal, optical, electrical, and electrochemical properties have been investigated as potential HTMs for PSCs. It has been found that the molecule with six hydroxyl substituted groups on the spiro-OMeTAD-based structure SOH6 exhibited the highest glass transition temperature (Tg) and melting point (Tm) as compared to SOH2 and SOH4 molecules. The UV-Vis absorption spectra portrayed a distinct pattern with the increase in hydroxyl substituted groups as it was slightly blue-shifted for the SOH6 molecule compared to red-shifted for SOH2 and SOH4 molecules. Carrier mobility shows a notable improvement with the hydroxyl substitution. The density functional theory (DFT) has provided useful insight into identifying the chemical stability of spiro-OMeTAD derivatives. In the device simulation, hydroxyl substituted spiro SOH2 was found to outperform its pristine counterpart, achieving a peak PCE of 17.61% with a Voc of 0.98 V, a Jsc of 22.69 mA/cm2, and an FF of 80.67% within the device structure FTO/TiO2/MAPbI3/HTMs/Au. This investigation provided insight into the development of novel spiro-OMeTAD-based derivatives with enhanced optoelectronic properties and showed promising potential for addressing the limitations of traditional HTMs in PSCs.
{"title":"Demethylation strategies for spiro-OMeTAD to enhance the thermo-opto-electronic properties as potential hole transport materials in perovskite solar cells","authors":"Puteri Intan Zulaikha SYED MAHADZIR, M. Mottakin, Muhammad Amirul Aizat Mohd Abdah, Puteri Nor Aznie Fahsyar, K. Jumbri, M. H. Mahyuddin, S. Sepeai, M. A. Mat Teridi, Norasikin Ahmad Ludin, M. Su'ait, Khaja Nazeeruddin","doi":"10.1088/2053-1591/ad6d33","DOIUrl":"https://doi.org/10.1088/2053-1591/ad6d33","url":null,"abstract":"\u0000 Spiro-OMeTAD is a widely used hole-transporting material (HTM) that plays a crucial role in achieving highly efficient perovskite solar cells (PSCs). In this work, a series of demethylated functionalized spiro-OMeTAD-based derivatives with different numbers of hydroxyl substituted groups (named as SOH2, SOH4, and SOH6) were synthesized, and their thermal, optical, electrical, and electrochemical properties have been investigated as potential HTMs for PSCs. It has been found that the molecule with six hydroxyl substituted groups on the spiro-OMeTAD-based structure SOH6 exhibited the highest glass transition temperature (Tg) and melting point (Tm) as compared to SOH2 and SOH4 molecules. The UV-Vis absorption spectra portrayed a distinct pattern with the increase in hydroxyl substituted groups as it was slightly blue-shifted for the SOH6 molecule compared to red-shifted for SOH2 and SOH4 molecules. Carrier mobility shows a notable improvement with the hydroxyl substitution. The density functional theory (DFT) has provided useful insight into identifying the chemical stability of spiro-OMeTAD derivatives. In the device simulation, hydroxyl substituted spiro SOH2 was found to outperform its pristine counterpart, achieving a peak PCE of 17.61% with a Voc of 0.98 V, a Jsc of 22.69 mA/cm2, and an FF of 80.67% within the device structure FTO/TiO2/MAPbI3/HTMs/Au. This investigation provided insight into the development of novel spiro-OMeTAD-based derivatives with enhanced optoelectronic properties and showed promising potential for addressing the limitations of traditional HTMs in PSCs.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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