Materials Technology最新文献

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Synthesis and piezocatalytic performance of β-BaTi2O5 nanorods by hydrothermal method from dried gel 干凝胶水热法制备β-BaTi2O5纳米棒及其压催化性能

IF 3.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Technology

Pub Date : 2022-12-27 DOI: 10.1080/10667857.2022.2163474

Xia Li, Hongjuan Zheng, J. Liu, Hongchen Li, Jing Wang, K. Yan, Jingsong Liu, Feng Dang, K. Zhu

ABSTRACT β-BaTi2O5 (β-BT2) nanorods were obtained for the first time by a simple hydrothermal method from a dried gel precursor. The influence of NaOH solution concentration sfrom 0.1 M to 2 M on crystallisation and microstructure was discussed. β-BT2 nanorod with a single-crystal structure exhibited obvious piezoelectric response and piezocatalytic capability for rhodamine B. The degradation of RhB by β-BT2 nanorods under ultrasonic irradiation demonstrated that β-BT2 was a potential piezocatalyst. The proposed strategy can serve as a valuable reference for the synthesis of β-BT2 nanorods and their application in piezocatalysis.

引用次数: 2

Band Gap Reduction and Improved Ferromagnetic Ordering via Bound Magnetic Polarons in Zn(Al, Ce)O Nanoparticles Zn(Al, Ce)O纳米粒子中束缚极化子的带隙减小和铁磁有序性的改善

IF 3.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Technology

Pub Date : 2022-11-30 DOI: 10.1080/10667857.2022.2151114

Ankit Sharma, R. Khangarot, S. Chattopadhyay, K. Misra, R. Misra, P. D. Babu

ABSTRACT Polycrystalline nanoparticles of Al-doped and Ce-co-doped ZnO were processed through sol-gel co-precipitation. Crystallite sizes determined from XRD were in the range of 10.90 to 48.77 nm. FTIR spectra indicated a stretching mode of Zn-O bond. The insertion of Al and Ce at Zn-O site created Al-O and Ce-O bonds. UV-vis spectra favoured the formation of impurity levels by doping and co-doping. Their overlapping with the conduction band edge led to the reduction of band-gap. Blue-green emission which arises from radiative recombination of a photogenerated hole with an electron occupying oxygen vacancy was observed in photoluminescence spectra. FESEM suggested granular growth in undoped ZnO which changed to diverse structures such as nano-bar and cluster of elongated grains. Significant improvement in room temperature ferromagnetism (RTFM) was noticed by co-doping of Ce in Al-doped ZnO. Formation of bound magnetic polarons (Ce3+-Vo-Ce3+) was the primary mechanism responsible for the improvement in RTFM.

引用次数: 2

Comment on “In-situ synthesis of Co3O4 nanocrystal clusters on graphene as high-performance oxygen reduction reaction electrocatalysts” by Juanjuan Yin et al 对尹娟娟等人“在石墨烯上原位合成Co3O4纳米晶簇作为高性能氧还原反应电催化剂”的评论

IF 3.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Technology

Pub Date : 2022-11-30 DOI: 10.1080/10667857.2022.2152962

V. Johánek

引用次数: 0

Laser-cladding of high entropy alloy coatings: an overview 激光熔覆高熵合金涂层的研究进展

IF 3.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Technology

Pub Date : 2022-11-26 DOI: 10.1080/10667857.2022.2151696

Na Gong, Tzee Luai Meng, Jing Cao, Yong Wang, Rahul Karyappa, Chee Kiang Ivan Tan, Ady Suwardi, Qiang Zhu, Andrew Chun Yong Ngo, Kamakhya Prakash Misra, R. D. K Misra, Hongfei Liu

ABSTRACT

High entropy alloys (HEAs), consisting of five or more elements with nearly equal atomic composition with one another (5–35%), are new-generation alloys that have attracted significant interest since their advent in 2004 because of their unique structural and mechanical properties and thermodynamic and chemical stability. Some characteristics, including high mechanical strength at elevated temperatures, high ductility and fracture toughness at cryogenic temperatures and high corrosion, erosion and wear resistance, have been demonstrated for HEAs that outperform traditional alloys and superalloys. Laser-cladding (LC) is an additive manufacturing technique that has good feasibility in designing and processing HEAs for advanced structural components and protective coatings. This overview provides a glimpse of recent advances in LC of HEAs in terms of design fundamentals, metallurgical phase and microstructure, specific properties for advanced coating applications and the effect of ceramic particles reinforcement in LC deposition of HEA coatings.

摘要:熵合金(HEAs)是新一代合金，由5种或5种以上的元素组成，它们的原子组成几乎相等(5-35%)，自2004年问世以来，由于其独特的结构和力学性能以及热力学和化学稳定性而引起了人们的极大兴趣。HEAs的一些特性，包括高温下的高机械强度，低温下的高延展性和断裂韧性，以及高腐蚀、侵蚀和耐磨性，已经证明其优于传统合金和高温合金。激光熔覆(LC)是一种增材制造技术，在先进结构部件和防护涂层的HEAs设计和加工中具有良好的可行性。本文概述了HEA LC在设计基础、冶金相和微观结构、高级涂层应用的特定性能以及陶瓷颗粒增强在HEA涂层LC沉积中的作用等方面的最新进展。

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引用次数: 8

Microstructural and dielectric properties of Mo-doped barium strontium titanate nanopowders 掺钼钛酸锶钡纳米粉体的微观结构和介电性能

IF 3.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Technology

Pub Date : 2022-11-24 DOI: 10.1080/10667857.2022.2151685

Kiflom Gebremedhn Kelele, H. Murthy, R. Balachandran, Aschalew Tadesse, K. Tan

ABSTRACT The goal of this research was to examine how the dielectric properties of barium strontium titanate (BST) differ from those of BST that has been doped with molybdenum. The slow injection sol-gel technique was used. The addition of Mo6+ ions into the lattice of BST caused reduction of the mean crystallite sizes of BST, from 19.35 nm to 17.84 nm. Similarly, the mean particle size decreased from 26.02 nm all the way to 18.58 nm following the addition of Mo within the BST structure. Ultimately, the dielectric constant of BST was elevated with a maximum value of 946.3 at 1 MHz as compared to the value of 233.8 for BST. After Mo was added to BST, a reduction in dielectric loss (0.15576 to 0.0356) was also attained. Because of this, the Mo dopant in BST has significantly altered its microstructural and dielectric properties, making it suitable for multiple applications.

摘要:本研究的目的是研究钛酸锶钡(BST)的介电性能与掺杂钼的BST的介电性能有何不同。采用慢速注射溶胶-凝胶技术。在BST晶格中加入Mo6+离子使BST的平均晶粒尺寸从19.35 nm减小到17.84 nm。同样，在BST结构中加入Mo后，平均粒径从26.02 nm一路减小到18.58 nm。最终，BST的介电常数升高，在1 MHz时最大值为946.3，而BST的介电常数为233.8。在BST中加入Mo后，介质损耗也降低了(0.15576 ~ 0.0356)。因此，BST中的Mo掺杂剂显著改变了其微结构和介电性能，使其适合多种应用。

引用次数: 1

Silybin-based herbal nanocarriers: an advancement in anticancer therapy 基于水飞蓟宾的草药纳米载体:抗癌治疗的进展

IF 3.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Technology

Pub Date : 2022-11-10 DOI: 10.1080/10667857.2022.2081286

Meghanath B. Shete, A. S. Deshpande, P. Shende

ABSTRACT Silybin is a key bioactive component of silymarin that display health-promoting actions in many chronic diseases. However, its clinical applicability is curtailed by its inherent issues like low aqueous solubility, poor bioavailability, high metabolism, fast elimination, and poor penetration in intestinal epithelial cells. In this context, nanotechnology plays a crucial role to address several issues of the broad range of bioactives. In this review, the authors have discussed the anticancer mechanism of silybin and its synergistic combinations. Further, it summarizes the emerging nanocarriers used to deliver silybin alone or in combination like lipid-based, polymeric micelles, polymeric nanoparticles, carbon nanotubes, gold nanoparticles, nanoemulsion, nanosuspension, and hydrogel. Besides, it presents the repercussions of nano-silybin and the present scenario of clinical studies in the field of cancer. The application of nanotechnology brings the opportunity for silybin to be used as an alternative for effective therapy in cancer management in near future. ABSTRACT

水飞蓟宾是水飞蓟素的重要生物活性成分，对许多慢性疾病具有促进健康的作用。然而，其固有的水溶性低、生物利用度差、代谢高、消除快、肠上皮细胞渗透性差等问题限制了其临床适用性。在这种情况下，纳米技术在解决广泛生物活性的几个问题方面起着至关重要的作用。本文就水飞蓟宾的抗癌作用机制及其增效组合作一综述。此外，它还总结了用于单独或联合递送水飞蓟宾的新兴纳米载体，如脂基、聚合物胶束、聚合物纳米粒子、碳纳米管、金纳米粒子、纳米乳液、纳米悬浮液和水凝胶。此外，还介绍了纳米水飞蓟宾在癌症领域的影响和临床研究的现状。纳米技术的应用为水飞蓟宾在不久的将来作为一种有效的癌症治疗方法提供了机会。摘要

引用次数: 2

Pregelatinized starch as a cohesion promoter improves mechanical property and surgical performance of calcium phosphate bone cement: the effect of starch type 预糊化淀粉作为内聚促进剂改善磷酸钙骨水泥的力学性能和手术性能:淀粉类型的影响

IF 3.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Technology

Pub Date : 2022-11-08 DOI: 10.1080/10667857.2022.2127640

Rui Zhang, Huiling Liu, H. Zhou, Chunyong Liang, X. Wang, Huilin Yang, Yanjie Bai, Lei Yang

ABSTRACT Calcium phosphate cement (CPC) has potentials in orthopaedics and orthodontics but it has significant limitations such as low mechanical strength, low injectability and instability in body. Starches from five botanical sources were used as cohesion additives to prepare calcium phosphate bone cement (CPB) and the starch source showed significant impact on physicochemical properties of the CPBs. CPB modified by pregelatinised waxy maize starch (CPB-W) had the highest mechanical strength, longest setting time, and most compact structure compared with other CPBs. As the amylose content increased, the viscosity of starch modified cement paste increased, and the cured cement had lower density and mechanical strength. It appears that starch with a low amylose content significantly improves the surgical performance and mechanical strength of CPC. CPB-W also exhibited good cytocompatibility to MC3T3-E1 cells. Starch modified CPBs are considered as promising injectable bone cements for minimally invasive surgery applications like vertebroplasty and kyphoplasty.

磷酸钙骨水泥(CPC)在骨科和正畸学中具有很大的应用潜力，但存在机械强度低、注射性差、体内不稳定等明显的局限性。以5种植物源淀粉为内聚剂制备磷酸钙骨水泥(CPB)，淀粉源对CPB的理化性能有显著影响。预糊化糯玉米淀粉(CPB- w)改性的CPB具有机械强度最高、凝结时间最长、结构最致密的特点。随着直链淀粉含量的增加，淀粉改性水泥浆体的粘度增加，固化水泥的密度和机械强度降低。结果表明，低直链淀粉含量的淀粉可以显著提高CPC的手术性能和机械强度。CPB-W对MC3T3-E1细胞也表现出良好的细胞相容性。淀粉改性CPBs被认为是一种很有前途的可注射骨水泥，可用于微创手术，如椎体成形术和后凸成形术。

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引用次数: 1

Ultrasonic Nano emulsification of Apricot Kernel Oil and Its Therapeutics Effects on Suppression of Human Lung Cancer Cells (A549) 超声纳米乳化杏仁油及其对人肺癌细胞的抑制作用

IF 3.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Technology

Pub Date : 2022-11-07 DOI: 10.1080/10667857.2022.2141170

A. Etminan, A. Neamati, S. Balanezhad, Atie Etminan

ABSTRACT This study was conducted with the aim of synthesising nanoemulsion of apricot kernel oil (AKO-NE) and evaluating its cytotoxic, pro-apoptotic, antioxidant and anti-angiogenic effects. The AKO-NE was synthesised by ultrasound (150 watt for 2 min) using a combination of Tween 20 and 80 as surfactant and ethylene glycol as co surfactant. Antioxidant capacity (ABTS, DPPH scavenging free radicals) and toxicity of AKO-NE (MTT assay) and its effects on the process of apoptosis (Flow cytometry and qPCR for BCL-2, Caspase 3, 7, 9) were evaluated by specialised methods. Then, the effect of AKO-NE on angiogenesis was measured by CAM and qPCR (VEGF and VEGFR) methods. The AKO-NE showed acceptable antioxidant power and selective toxicity effects against lung cancer cells (162.7 µl/mL). The pro-apoptotic effects of AKO-NE were confirmed by increasing the number of SubG1 phase cells in flow cytometry and increasing the expression of Cas-3, 7 and 9 genes and decreasing the expression of BCL-2 gene in qPCR method. Decreased vascular and foetal growth factors in the CAM model as well as decreased expression of VEGF and VEGF-R genes in AKO-NE-treated cells confirmed the inhibitory effects of AKO-NE on angiogenesis. Inhibitory effects of AKO-NE on the growth and proliferation of A549 cancer cells and induction of apoptosis, as well as its effects on reducing angiogenesis, can suggest this nanoemulsion as a useful combination in cancer therapy.

摘要:本研究旨在合成杏仁油纳米乳(AKO-NE)，并评价其细胞毒、促凋亡、抗氧化和抗血管生成作用。以Tween 20和80作为表面活性剂，乙二醇作为co表面活性剂，通过超声波(150瓦，2分钟)合成了aco - ne。通过专门的方法评估AKO-NE的抗氧化能力(ABTS, DPPH清除自由基)和毒性(MTT法)及其对凋亡过程的影响(流式细胞术和qPCR检测BCL-2, Caspase 3, 7, 9)。然后，采用CAM和qPCR (VEGF和VEGFR)方法检测AKO-NE对血管生成的影响。AKO-NE对肺癌细胞具有良好的抗氧化能力和选择性毒性作用(162.7µl/mL)。通过流式细胞术检测增加SubG1期细胞数量，qPCR检测增加cas3、7、9基因表达，降低BCL-2基因表达，证实了AKO-NE的促凋亡作用。CAM模型中血管和胎儿生长因子的减少以及AKO-NE处理细胞中VEGF和VEGF- r基因的表达减少证实了AKO-NE对血管生成的抑制作用。AKO-NE对A549癌细胞的生长增殖和诱导凋亡的抑制作用，以及其减少血管生成的作用，表明该纳米乳是一种有效的癌症治疗组合。

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引用次数: 1

Ecofriendly surface modification of cotton fabric to enhance the adhesion of CuO nanoparticles for antibacterial activity 环保型表面改性棉织物，增强CuO纳米颗粒的粘附性，提高抗菌活性

IF 3.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Technology

Pub Date : 2022-11-04 DOI: 10.1080/10667857.2022.2141169

S. B. Tharchanaa, T. Anupriyanka, G. Shanmugavelayutham

ABSTRACT The present study employs a facile and environmentally cleaner plasma technology to induce adhesion between the cotton fabric and CuO nanoparticles. The oxygen plasma pre-treatment of cotton fabric was performed using DC glow discharge plasma for different plasma treatment times (5, 10 and 15 min) with constant pressure and power. The untreated and plasma treated cotton fabrics were analysed by contact angle, AFM, XPS, XRD, FESEM and elemental mapping analysis. From the AFM results, it is observed that the surface roughness of treated fabric increases with plasma treatment time. XPS analysis reveals that the oxygen plasma treatment introduces oxygen-rich functional groups on the surface which provides the adhesion property of cotton fabric. The 15 min oxygen plasma treated cotton fabric is optimised to coat the CuO nanoparticles based on the AFM and XPS analyses. Furthermore, the CuO nanoparticles coated plasma treated cotton fabric are analysed for antibacterial test and a significant antibacterial activity was identified for gram-positive and gram-negative bacteria. Graphical abstract

摘要:本研究采用一种简单、环保的等离子体技术诱导棉织物与CuO纳米颗粒之间的粘附。采用直流辉光放电等离子体，在恒压恒功率条件下，对棉织物进行不同等离子体处理时间(5、10、15 min)的氧等离子体预处理。采用接触角、原子力显微镜(AFM)、XPS、XRD、FESEM和元素图分析等方法对未经处理和等离子处理的棉织物进行了分析。AFM结果表明，织物表面粗糙度随等离子体处理时间的延长而增加。XPS分析表明，氧等离子体处理在织物表面引入富氧官能团，使织物具有良好的附着力。根据AFM和XPS分析，优化了15分钟氧等离子体处理棉织物，以覆盖CuO纳米颗粒。此外，对CuO纳米粒子包覆等离子体处理的棉织物进行抗菌测试，发现其对革兰氏阳性和革兰氏阴性细菌具有显著的抗菌活性。图形抽象

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引用次数: 2

Boosting performance of triboelectric nanogenerator via polydimethylsiloxane modified with perovskite BiFeO3 nanoparticles 钙钛矿BiFeO3纳米粒子修饰聚二甲基硅氧烷提高摩擦电纳米发电机性能

IF 3.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Technology

Pub Date : 2022-10-26 DOI: 10.1080/10667857.2022.2138804

Kun Zhao, Xueting Zhang, Haoran Lv, Wanru Sun, Ming Zhong, Maocheng Liu, Hongjie Liu, Ding Zhang

ABSTRACT Triboelectric nanogenerators (TENGs) have great potential applications in the field of microelectronics. However, the low surface charge density of the triboelectric layer is one of the key problems greatly limiting its output performance. Herein, we report a high-performance TENG using BiFeO3@polydimethylsiloxane (BFO@PDMS) composite film as a triboelectric layer. The results indicate that doping a small amount of BFO particles can significantly increase the dielectric constant and surface area of the PDMS film, which maximises the surface charge density of the triboelectric layer. With an optimized doping concentration , the dielectric constant of BFO@PDMS composite film is 14.2% higher than that of the pure PDMS film. The BFO@PDMS-based TENG delivers a maximum output voltage and current of 180 V and 30 μA, corresponding to 200% and 500% increases compared with pure PDMS film, respectively, which can drive an electronic watch and light 52 LEDs, indicating potential applications in microelectronic devices.

摩擦纳米发电机(TENGs)在微电子领域具有巨大的应用潜力。摩擦电层表面电荷密度低是制约摩擦电层输出性能的关键问题之一。在此，我们报告了使用BiFeO3@polydimethylsiloxane (BFO@PDMS)复合薄膜作为摩擦电层的高性能TENG。结果表明，少量BFO颗粒的掺杂可以显著提高PDMS膜的介电常数和表面积，使摩擦电层的表面电荷密度达到最大。优化掺杂浓度后，BFO@PDMS复合膜的介电常数比纯PDMS膜的介电常数高14.2%。BFO@PDMS-based TENG的最大输出电压和电流分别为180 V和30 μA，与纯PDMS薄膜相比分别提高了200%和500%，可驱动一块电子表和点亮52个led，在微电子器件中具有潜在的应用前景。

引用次数: 2

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全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

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