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The past to the current advances in the synthesis and applications of silica nanoparticles 纳米二氧化硅的合成和应用从过去到现在的进展
IF 5.45 Q1 Physics and Astronomy Pub Date : 2024-11-02 DOI: 10.1016/j.nanoso.2024.101395
Abdullah Al Ragib , Rupesh Chakma , Junzheng Wang , Yousef Mohammed Alanazi , Mohanad El-Harbawi , Gulshan Akter Arish , Tariqul Islam , Md. Abu Bakar Siddique , Abu Reza Md. Towfiqul Islam , Tapos Kormoker
To deal with different important and updated applications like biomedical, pharmaceutical, industrial, agricultural, environmental, food, cosmetics, and even water purification, the synthetic approaches of solid silica nanoparticles (SSiNPs) and its porous variant mesoporous silica nanoparticles (MSiNPs) become a matter of attention. The outstanding non-toxic nature and exceptional properties like bio-mobilizability, easy surface modifiability, stability, micro or meso pore structure, volume, and high surface area make them versatile contributors and potential candidates in human civilization. This review article comprises a brief summarization of the synthesis of SiNPs chemically as well as through a green approach along with its noteworthy characteristics in which it is clearly shown how the functional molecules change the particle size and shape for multiple purposes. This article mainly focuses greatly effective all conventional chemical and green approaches of both silica nanoparticles (SiNPs) and MSiNPs (a total of 21 synthesis techniques). Also, the newly modified methods are cited in this review paper along with challenges and prospects. One of the most important discussions regarding sustainable, reliable, and eco-friendly (green) synthesis techniques and their available sources, advantages, and principles are mentioned in this paper. Finally, several relevant recent applications by many researchers are also noted with possible research in the industrial, chemical, agricultural, and biomedical life-related sectors. This review will help the researchers to gain the necessary information in perfect order which can be applied in the near future to invent and modify new methods on a bigger scale.
为了应对生物医学、制药、工业、农业、环境、食品、化妆品甚至水净化等不同的重要和最新应用,固体二氧化硅纳米颗粒(SSiNPs)及其多孔变体介孔二氧化硅纳米颗粒(MSiNPs)的合成方法成为人们关注的问题。它们具有出色的无毒性和特殊性能,如生物可移动性、易表面改性、稳定性、微孔或中孔结构、体积和高比表面积,使它们成为人类文明的多功能贡献者和潜在候选者。这篇综述文章简要概述了通过化学方法和绿色方法合成 SiNPs 及其显著特点,其中清楚地表明了功能分子如何改变颗粒的大小和形状以达到多种目的。本文主要关注二氧化硅纳米粒子(SiNPs)和 MSiNPs 的所有传统化学方法和绿色方法(共 21 种合成技术)。此外,本文还列举了新近改进的方法,以及这些方法所面临的挑战和前景。本文还提到了有关可持续、可靠和生态友好型(绿色)合成技术及其可用来源、优势和原理的最重要讨论之一。最后,本文还提到了许多研究人员最近的一些相关应用,以及在工业、化学、农业和生物医学生命相关领域可能开展的研究。这篇综述将有助于研究人员有序地获取必要的信息,并在不久的将来应用于更大规模的新方法发明和改良。
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引用次数: 0
Fabrication and characterization of Carbon Dot-induced Fe MOF for the detection and destruction of cancer cell 用于检测和破坏癌细胞的碳点诱导铁 MOF 的制备和特性分析
IF 5.45 Q1 Physics and Astronomy Pub Date : 2024-11-02 DOI: 10.1016/j.nanoso.2024.101401
Sayani Maiti , Suvendu Nandi , Swarup Krishna Bhattacharyya , Aparajita Pal , Baidyanath Roy , Samit Kumar Ray , Mahitosh Mandal , Narayan Ch. Das , Susanta Banerjee
Developing an effective drug delivery system that targets cancer cells while minimizing the side effects of chemotherapy continues to be a significant challenge in the field of cancer therapy. This work introduces a bio-degradable metal organic framework (MOF) scaffold system that is enhanced with carbon dots (CDs) to facilitate the precise delivery of drugs and tracing of their pathways within cancer cells. We synthesized and reduced an iron based MOF (rMOF) to enable Fenton reactions in cancer cells. The carbon dots derived from folic acid were crosslinked with the rMOF using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide (EDC-NHS) crosslinking chemistry to provide bio-sensing capabilities and subsequent incorporation of the anticancer drug 5 fluorouracil (5 FU) into this system for targeted anticancer activity. The rMOF-CD linkage is disrupted in acidic environments because of amine group protonation, which results in disintegration of the MOF structure and release of Fe2+ ions. These ions are capable of destroying cancer cells by engaging in Fenton reactions with the presence of H2O2 in the cells. Simultaneously, the release of CDs initiates fluorescence, which has been previously suppressed by the molecular structure. 5 FU exhibits substantial anticancer activity, as evidenced by its favourable release profile under acidic conditions (60.42 %). Cellular uptake and viability assessments of HeLa (cervical cancer) and MCF-7 (breast cancer) cell lines, as well as non-cancerous L929 cells, have produced promising results, particularly for folate rich HeLa cells. This study illustrates a novel method of bio-sensing by fluorescent CDs and targeted drug delivery, which is combined with MOF mediated destruction of cancer cells and Fenton reactions.
开发一种既能靶向癌细胞又能最大限度减少化疗副作用的有效给药系统仍然是癌症治疗领域的一项重大挑战。这项工作介绍了一种生物可降解金属有机框架(MOF)支架系统,该系统通过碳点(CD)增强,可促进药物的精确输送并追踪药物在癌细胞内的路径。我们合成并还原了一种铁基 MOF(rMOF),使其能在癌细胞中进行芬顿反应。我们使用 1-乙基-3-(3-二甲氨基丙基)碳二亚胺和 N-羟基琥珀酰亚胺(EDC-NHS)交联化学方法将叶酸衍生的碳点与 rMOF 交联,以提供生物传感能力,并随后将抗癌药物 5 氟尿嘧啶(5 FU)纳入该系统,以获得靶向抗癌活性。由于胺基质子化作用,rMOF-CD 连接在酸性环境中会被破坏,从而导致 MOF 结构解体并释放出 Fe2+ 离子。这些离子能与细胞中的 H2O2 发生 Fenton 反应,从而摧毁癌细胞。与此同时,CD 的释放也引发了荧光,而这种荧光之前一直被分子结构所抑制。5 FU 具有很强的抗癌活性,其在酸性条件下的良好释放曲线(60.42%)就证明了这一点。对 HeLa(宫颈癌)和 MCF-7(乳腺癌)细胞系以及非癌细胞 L929 进行的细胞吸收和存活率评估结果令人鼓舞,尤其是富含叶酸的 HeLa 细胞。这项研究展示了一种通过荧光 CD 进行生物传感和靶向给药的新方法,该方法与 MOF 介导的癌细胞破坏和 Fenton 反应相结合。
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引用次数: 0
QbD decorated ellagic acid loaded polymeric nanoparticles: Factors influencing desolvation method and preliminary evaluations QbD 装饰鞣花酸负载聚合物纳米颗粒:影响脱溶方法的因素及初步评估
IF 5.45 Q1 Physics and Astronomy Pub Date : 2024-10-31 DOI: 10.1016/j.nanoso.2024.101378
Priya Patel , Ashish Thanki , Devesh U. Kapoor , Bhupendra G. Prajapati
Polymeric nanoparticles are one of the emerging drug delivery systems in the field of oncology. Ellagic acid is a polyphenolic compound with vast effects like anti-cancer, anti-viral, and anti-oxidant. The ellagic acid nanoparticles was prepared by desolvation method. Formulating ellagic acid NPs using BSA enhances the stability and solubility of ellagic acid. Quality by design (QbD) based approach was adopted to improve the final quality and effectiveness of the formulation. The Critical quality attribute (CQAs) was defined and risk assessment was performed with the help of the Ishikawa fishbone diagram. Solubility analysis was done for the drug with methanol, ethanol, water, and acetone. Preliminary studies were performed to study the effect of type of desolvating agent, the concentration of polymer the pH of the polymer solution, amount of desolvating agent on the particle size and entrapment efficiency of the nanoparticles. A greater quantity of desolvating agent results in a narrower particle size because of thorough desolvation, and the increased encapsulation efficiency is linked to reduced protein-protein interactions. Desolvation process can cause the protein to gradually change structure, form clumps, and eventually form nanoparticles, so might be its shows increase in entrapment efficiency. A desolvating agent volume of 4 ml resulted in a particle size of 1724 ± 1.27 nm. When the amount of desolvating agent was increased to 6 ml and 8 ml, the particle size decreased to 160 ± 0.66 nm and 218 ± 0.47 nm, respectively. Fourier Transform Infrared Spectroscopy (FTIR) data showed no incompatibilities were observed between drug and polymer. In-vitro dissolution showed the nanoparticles may follow the control release pattern over 24 hours. All the formulated batches of zeta potential were found to be in the range −30 mV to +30 mV which indicated good colloidal stability of the NPs and the PDI value ranging from 0.18 to 2.8. The higher drug encapsulation of the drug was more than 50 % which gives higher drug release at a site of action and in-vitro drug release of more than 80 % may improve the dosage frequency. The in vitro drug release data was also studied by various kinetic models. The in vitro drug release analysis shows sustained release of drug from nanoparticles and follow Korsmeyer-Peppas model. All these findings were in good agreement which may open a new gateway for future research in the field of oral oncology.
聚合纳米粒子是肿瘤学领域新兴的给药系统之一。鞣花酸是一种多酚化合物,具有抗癌、抗病毒和抗氧化等多种功效。鞣花酸纳米粒子采用脱溶法制备。使用 BSA 配制鞣花酸 NPs 可提高鞣花酸的稳定性和可溶性。为提高制剂的最终质量和效果,采用了基于质量设计(QbD)的方法。在石川鱼骨图的帮助下,定义了关键质量属性(CQAs)并进行了风险评估。对药物在甲醇、乙醇、水和丙酮中的溶解度进行了分析。初步研究了脱溶剂的类型、聚合物的浓度、聚合物溶液的 pH 值、脱溶剂的用量对纳米颗粒的粒度和夹持效率的影响。脱溶剂用量越大,脱溶越彻底,粒径越窄,包封效率越高,这与蛋白质与蛋白质之间的相互作用减少有关。脱溶过程会使蛋白质逐渐改变结构,形成团块,最终形成纳米颗粒,因此可能会显示出包封效率的提高。脱溶剂用量为 4 ml 时,粒径为 1724 ± 1.27 nm。当脱溶剂的量增加到 6 毫升和 8 毫升时,粒径分别减小到 160 ± 0.66 nm 和 218 ± 0.47 nm。傅立叶变换红外光谱(FTIR)数据显示,药物和聚合物之间没有不相容现象。体外溶解显示,纳米颗粒可在 24 小时内遵循控制释放模式。所有配制批次的 zeta 电位都在 -30 mV 至 +30 mV 之间,这表明 NPs 具有良好的胶体稳定性,PDI 值在 0.18 至 2.8 之间。药物的封装率超过 50%,这使得药物在作用部位的释放率更高,体外药物释放率超过 80%,可提高用药频率。体外药物释放数据也通过各种动力学模型进行了研究。体外药物释放分析表明,药物从纳米颗粒中持续释放,并遵循 Korsmeyer-Peppas 模型。所有这些研究结果都非常吻合,为今后口腔肿瘤学领域的研究开辟了一条新途径。
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引用次数: 0
Impact of marine collagen on nanocosmetics: A comprehensive review 海洋胶原蛋白对纳米化妆品的影响:全面回顾
IF 5.45 Q1 Physics and Astronomy Pub Date : 2024-10-31 DOI: 10.1016/j.nanoso.2024.101394
Geeta Patel, Heema Chokshi, Bhupendra Prajapati
Collagen, a fundamental protein in the extracellular matrix, plays a pivotal role in maintaining skin health, elasticity, and overall appearance. In recent years, marine-derived collagen has gained significant attention due to its unique properties, sustainable sourcing, and potential applications in pharmaceuticals, drug delivery systems, food industry, biomedical and cosmetic industry. Marine collagen, derived from marine organisms, has emerged as a valuable ingredient in cosmetic formulations due to its superior biocompatibility, biodegradability, and high tensile strength. In nanocosmetics, marine collagen is often incorporated into nanoparticles to improve its delivery and efficacy. The incorporation of marine collagen in nanocosmetics not only leverages its anti-aging benefits but also enhances the stability and bioavailability of other active ingredients in the formulation. This review summarizes various properties, extraction methods, processing, purification, applications and regulatory requirements of marine collagen. Additionally, potential benefits challenges, and future directions of marine collagen nanoparticles discussed in this article would be beneficial for researchers for developing newer formulations.
胶原蛋白是细胞外基质中的一种基本蛋白质,在保持皮肤健康、弹性和整体外观方面发挥着举足轻重的作用。近年来,海洋提取的胶原蛋白因其独特的性质、可持续的来源以及在制药、给药系统、食品工业、生物医学和化妆品行业的潜在应用而备受关注。从海洋生物中提取的海洋胶原蛋白因其卓越的生物相容性、生物可降解性和高拉伸强度,已成为化妆品配方中的重要成分。在纳米化妆品中,海洋胶原蛋白通常被掺入纳米颗粒中,以提高其传递性和功效。在纳米化妆品中加入海洋胶原蛋白不仅能利用其抗衰老功效,还能提高配方中其他活性成分的稳定性和生物利用度。本综述总结了海洋胶原蛋白的各种特性、提取方法、加工、纯化、应用和监管要求。此外,本文所讨论的海洋胶原蛋白纳米粒子的潜在优势、挑战和未来发展方向将有助于研究人员开发更新的配方。
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引用次数: 0
Enhanced photocatalytic performance of magnetically reclaimable N-doped g-C3N4/Fe3O4 nanocomposites for efficient tetracycline degradation 增强磁性可回收 N 掺杂 g-C3N4/Fe3O4 纳米复合材料的光催化性能,实现四环素的高效降解
IF 5.45 Q1 Physics and Astronomy Pub Date : 2024-10-28 DOI: 10.1016/j.nanoso.2024.101392
Paramasivam Shanmugam , Mohan Gopalakrishnan , Siwaporn Meejoo Smith , Apanee Luengnaruemitchai , Soorathep Kheawhom , Supakorn Boonyuen
The growing environmental challenge posed by the persistence of tetracycline (TC) antibiotics in natural waters is of increasing concern. To address this, there is an imperative need for advanced methods to mitigate TC residues. Herein, we demonstrate the preparation of nitrogen-doped graphitic carbon nitride integrated with magnetic Fe3O4 (N-g-CN/Fe3O4) composites, showcasing narrow band gaps optimized for TC degradation. These advanced materials, conceived through a thermal poly-condensation approach, utilize citric acid and melamine as precursors for nitrogen and g-CN, respectively. These composites exhibit a face-centered cubic architecture, with particle dimensions between 8 to 12 nm and encompassing both meso and microporous structure. The results of the Brunauer–Emmett–Teller analysis indicated specific surface areas of 6.73 m²/g for g-CN, 69.80 m²/g for N-g-CN, 62.55 m²/g for Fe3O4, and 148.32 m²/g for N-g-CN/Fe3O4. These values demonstrate an increase in surface area upon the incorporation of heteroatom of nitrogen and Fe3O4, into the g-CN matrix, thus influence the photocatalytic performance. Under solar light exposure, the synthesized photocatalysts demonstrated photocatalytic activity with a degradation efficiency of 94.16 % within 120 min. Specifically, the N-g-CN/Fe3O4 (22.5 %) composites exhibited remarkable photocatalytic efficiency due to the narrow band gap energy between N-g-CN and Fe3O4, enhanced light absorption in the visible range, and effective charge carrier separation and transportation to the pollutants. N-g-CN/Fe3O4 (22.5 %) composites demonstrated good recyclability (five cycles), magnetic sustainability, and stability for the degradation of TC and emerging pollutants from wastewater using photocatalysts. Similarly, FGCN composites exhibited good recyclability (five cycles), magnetic retrievability, and stability for degrading organic and emerging pollutants from wastewater through photocatalysis. This efficiency can be attributed to the harmonious combination of nitrogen doping, refined surface area, and the natural heterojunction between N-g-CN and Fe3O4.
四环素(TC)抗生素在天然水域中的持久性所带来的日益严峻的环境挑战正日益引起人们的关注。为解决这一问题,迫切需要先进的方法来减少四环素类抗生素的残留。在本文中,我们展示了氮掺杂氮化石墨与磁性 Fe3O4(N-g-CN/Fe3O4)复合材料的制备方法,其窄带隙可优化 TC 降解。这些先进材料采用热缩聚方法,分别以柠檬酸和三聚氰胺作为氮和 g-CN 的前体。这些复合材料呈现出面心立方结构,颗粒尺寸在 8 到 12 nm 之间,包含中孔和微孔结构。布鲁瑙尔-艾美特-泰勒分析结果表明,g-CN 的比表面积为 6.73 m²/g,N-g-CN 为 69.80 m²/g,Fe3O4 为 62.55 m²/g,N-g-CN/Fe3O4 为 148.32 m²/g。这些数值表明,氮和 Fe3O4 的杂原子加入 g-CN 基质后,表面积增大,从而影响了光催化性能。在太阳光照射下,合成的光催化剂具有光催化活性,120 分钟内的降解效率达到 94.16%。具体而言,N-g-CN/Fe3O4(22.5%)复合材料表现出显著的光催化效率,这是由于 N-g-CN 和 Fe3O4 之间的带隙能较窄,增强了可见光范围内的光吸收,并有效地将电荷载流子分离和传输到污染物中。N-g-CN/Fe3O4 (22.5%) 复合材料在利用光催化剂降解废水中的三氯甲烷和新污染物方面表现出良好的可回收性(五次循环)、磁性可持续性和稳定性。同样,FGCN 复合材料在通过光催化降解废水中的有机污染物和新污染物方面也表现出良好的可回收性(五个周期)、磁性可回收性和稳定性。这种效率可归因于氮掺杂、细化表面积以及 N-g-CN 和 Fe3O4 之间天然异质结的和谐组合。
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引用次数: 0
The effect of external force on the crack propagation of aluminum nanoplate using molecular dynamics approach: Insights into the fracture mechanisms of metallic nanomaterials under external loading condition 利用分子动力学方法研究外力对纳米铝板裂纹扩展的影响:外部加载条件下金属纳米材料断裂机制的启示
IF 5.45 Q1 Physics and Astronomy Pub Date : 2024-10-28 DOI: 10.1016/j.nanoso.2024.101397
Shaymaa Abed Hussein , Rassol Hamed Rasheed , Murtadha M. Al-Zahiwat , Abrar A. Mohammed , Soheil Salahshour , Sh. Baghaei
It is crucial to comprehend how external forces (EFs) affect crack propagation (CP) in aluminum (Al) nanoplates to develop and create nanomaterials with enhanced mechanical characteristics. The creation of novel materials for a variety of uses, such as the aerospace, electronics, and energy sectors, may benefit from this expertise. Additionally, insights into the fracture mechanisms of nanomaterials can aid in designing more reliable and durable structures at the nanoscale. This study utilized computer models to investigate the effect of EFs on fractures in Al nanoplates. The results suggest that an EF can significantly alter CP within nanoplates. The findings provide insights into the fracture mechanisms of metallic nanomaterials under external loading conditions. Simulation results in current research showed the physical stability of modeled Al nanoplates at T=300 K as the initial temperature. Numerically, the total energy (TE) of pristine nanoplate converged to −34762.953 eV after thermodynamic equilibrium detection inside the computational box. Furthermore, the simulation results show that EF caused the crack growth procedure intensity to increase. In the present study, the crack length value increased to 33.902 Å between our modeled samples. This result led to the conclusion that in real-world applications, it is important to consider the effect of EFs on the development of cracks within Al nanoplates.
了解外力(EF)如何影响铝(Al)纳米板的裂纹扩展(CP),对于开发和创造具有更强机械特性的纳米材料至关重要。为航空航天、电子和能源等多种用途创造新型材料可能会受益于这一专业知识。此外,深入了解纳米材料的断裂机制有助于设计出更可靠、更耐用的纳米级结构。本研究利用计算机模型研究了 EF 对铝纳米板断裂的影响。结果表明,EF 能显著改变纳米板内的 CP。这些发现为了解金属纳米材料在外部加载条件下的断裂机制提供了启示。当前研究的模拟结果表明,在初始温度为 T=300 K 时,模型铝纳米板具有物理稳定性。通过数值计算,原始纳米板的总能量(TE)在计算盒内经过热力学平衡检测后收敛至-34762.953 eV。此外,模拟结果表明,EF 导致裂纹生长过程强度增加。在本研究中,建模样品之间的裂纹长度值增加到 33.902 Å。这一结果得出的结论是,在实际应用中,考虑 EF 对铝纳米板内部裂纹发展的影响非常重要。
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引用次数: 0
Comprehensive evaluation of TiO2 nanofluid stability: Insights from pH, EC measurements, and UV-Vis spectroscopy 全面评估 TiO2 纳米流体的稳定性:从 pH 值、导电率测量和紫外可见光谱中获得的启示
IF 5.45 Q1 Physics and Astronomy Pub Date : 2024-10-28 DOI: 10.1016/j.nanoso.2024.101387
Chakar Khadija , Asdiou Nouhaila , Salhi Anas , Salhi Imane , El Mouden Mahmoud , Hajjaji Abdelowahed , Muthanna H. Al-Dahhan
This study delves into assessing the stability of different nanofluids containing TiO2 nanoparticles, employing either ethylene glycol (EG) or water as the base fluid. The results obtained will be applied to photovoltaic panels in future work, in particular to solve the cooling problems facing these systems, in order to improve their efficiency and durability. The nanoparticles, approximately 75 nm in size as determined by the Debye-Scherrer equation and X-ray diffraction (XRD), were utilized to formulate nanofluids at concentrations of 0.1 %, 0.3 %, and 0.5 % using a two-step method. To gauge the stability of these prepared nanofluids, practical investigations were conducted involving pH and electrical conductivity (EC) measurements, along with UV-Vis spectroscopy spanning the wavelength range of 200–800 nm. The findings reveal that nanofluids with 0.1 % and 0.5 % TiO2 in water demonstrated promising stability. Moreover, the absorbance levels of nanofluids containing 0.1 %, 0.3 %, and 0.5 % TiO2 in EG, as well as 0.3 % TiO2 in water, decreased with increasing settling time, as observed through UV-Vis spectroscopy analysis, consistent with prior research. Additionally, the study of pH and EC stability for 0.5 % TiO2 in water indicated satisfactory results.
本研究采用乙二醇(EG)或水作为基液,深入评估了含有二氧化钛纳米颗粒的不同纳米流体的稳定性。获得的结果将在今后的工作中应用于光伏电池板,特别是解决这些系统面临的冷却问题,以提高其效率和耐用性。通过德拜-舍勒方程和 X 射线衍射 (XRD) 测定,纳米粒子的尺寸约为 75 纳米,利用这种纳米粒子,采用两步法配制出浓度分别为 0.1%、0.3% 和 0.5% 的纳米流体。为了衡量这些制备的纳米流体的稳定性,进行了实际调查,包括 pH 值和导电率 (EC) 测量,以及波长范围为 200-800 纳米的紫外可见光谱分析。研究结果表明,在水中添加 0.1 % 和 0.5 % TiO2 的纳米流体具有良好的稳定性。此外,通过紫外可见光谱分析观察到,EG 中含 0.1 %、0.3 % 和 0.5 % TiO2 的纳米流体以及水中含 0.3 % TiO2 的纳米流体的吸光度随着沉淀时间的增加而降低,这与之前的研究结果一致。此外,对水中 0.5 % TiO2 的 pH 值和导电率稳定性的研究结果令人满意。
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引用次数: 0
Effect of silver doping on structural, optical and antifungal properties of copper oxide nanoparticles prepared using Colocasia esculenta leaf extract 银掺杂对利用芋叶提取物制备的氧化铜纳米粒子的结构、光学和抗真菌特性的影响
IF 5.45 Q1 Physics and Astronomy Pub Date : 2024-10-28 DOI: 10.1016/j.nanoso.2024.101385
P. Kiran Kumar , Bharathipriya Rajasekaran , Vaidyanathan Vinoth Kumar , Vahulabaranan Rajagopalan , P. Karthik
Copper oxide (CuO) nanoparticles have attracted significant interest for their diverse applications. This study focused on the eco-friendly synthesis of undoped and silver (Ag) doped CuO nanoparticles using Colocasia esculenta leaf extract. XRD analysis revealed a cubic crystal structure in Ag doped nanoparticles with reduced crystallinity compared to undoped counterpart. FTIR spectra confirmed the efficient encapsulation of plant extracts and significant microstructural modification due to doping. Both undoped and Ag-doped CuO nanoparticles exhibited distinct optical property, characterized by a consistent direct band gap energy of 5.3 eV. Ag-doped CuO nanoparticles demonstrated a higher negative zeta potential (-29 mV) and smaller particle size (98.5 nm), resulting in a stable colloidal dispersion with lower polydispersity index. Morphology revealed reduced agglomeration and smaller grain size in doped CuO nanoparticles, leading to more uniform, spherical particles as confirmed by EDX, which indicated the successful inclusion of Ag ions in the CuO lattice. Furthermore, Ag doping significantly enhanced antifungal activities of CuO nanoparticles (p<0.01). The increased generation of reactive oxygen species led to greater microbial cell damage and higher inhibition zones, with a maximum inhibition of 28 nm and 27 nm against Botrytis cinerea and Phoma medicaginis, respectively at a concentration of 250 µg/ml. Hence, the study highlights the potential of green synthesized CuO nanoparticles, especially Ag-doped variants, as effective antifungal agents. Their versatile properties make CuO nanoparticles as a promising candidate for a wide range of applications in biomedicine and agriculture.
氧化铜(CuO)纳米粒子因其用途广泛而备受关注。本研究的重点是利用芋头叶提取物合成未掺杂和掺银(Ag)的环保型氧化铜纳米粒子。XRD 分析表明,与未掺杂的纳米粒子相比,掺银纳米粒子的结晶度降低,呈立方晶体结构。傅立叶变换红外光谱证实了植物提取物的有效封装以及掺杂导致的显著微结构改变。未掺杂和掺银的氧化铜纳米粒子均表现出独特的光学特性,其直接带隙能为 5.3 eV。掺银的 CuO 纳米粒子具有更高的负 zeta 电位(-29 mV)和更小的粒径(98.5 nm),从而形成了具有较低多分散指数的稳定胶体分散体。形态学显示,掺杂的 CuO 纳米颗粒的团聚减少,晶粒尺寸变小,从而形成了更均匀的球形颗粒,这一点已通过 EDX 得到证实,表明银离子成功地加入了 CuO 晶格中。此外,Ag 掺杂大大提高了 CuO 纳米粒子的抗真菌活性(p<0.01)。活性氧生成的增加导致了更大的微生物细胞损伤和更高的抑制区,在浓度为 250 µg/ml 时,对灰霉病菌(Botrytis cinerea)和噬菌体(Phoma medicaginis)的最大抑制作用分别为 28 nm 和 27 nm。因此,该研究强调了绿色合成的 CuO 纳米粒子(尤其是掺杂银的变体)作为有效抗真菌剂的潜力。氧化铜纳米粒子的多功能特性使其有望在生物医学和农业领域得到广泛应用。
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引用次数: 0
A review of corrosion resistance in steel alloys with MOF-embedded coatings 含 MOF 嵌入涂层的钢合金耐腐蚀性综述
IF 5.45 Q1 Physics and Astronomy Pub Date : 2024-10-25 DOI: 10.1016/j.nanoso.2024.101384
Arash Fattah-alhosseini, Shiva Zaheri, Minoo Karbasi
Steel is widely used due to its strength, cost-effectiveness, availability, ease of fabrication, ductility, and design flexibility. However, corrosion is a significant challenge, especially in outdoor environments, leading to gradual degradation. Applying coatings to steel and its alloys is an effective way to protect them from corrosive media. Recently, researchers have explored using metal-organic frameworks (MOFs) in protective coatings for various metal alloys. MOFs, hybrid crystalline materials made of metal ions (or clusters) bonded to organic ligands, have gained substantial interest in both organic and inorganic chemistry. They exhibit remarkable characteristics, such as high specific surface area, tunable structure and functionality, well-organized pore arrangement, and abundant active sites, making them promising anticorrosion materials. This review paper focuses on recent research developments in MOF-based corrosion protection materials and assesses their effectiveness in preventing corrosion.
钢材因其强度高、成本效益高、可用性强、易于制造、延展性好和设计灵活而被广泛使用。然而,腐蚀是一项重大挑战,尤其是在室外环境中,会导致逐渐退化。在钢及其合金上涂覆涂层是保护其免受腐蚀介质侵蚀的有效方法。最近,研究人员探索将金属有机框架(MOFs)用于各种金属合金的保护涂层。MOFs 是由金属离子(或团簇)与有机配体结合而成的混合晶体材料,在有机化学和无机化学领域都受到了广泛关注。它们具有高比表面积、可调结构和功能性、孔隙排列有序、活性位点丰富等显著特点,是很有前途的防腐材料。本综述论文重点介绍基于 MOF 的防腐材料的最新研究进展,并评估其防腐效果。
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引用次数: 0
Multiscale modeling-driven synthesis of Cu40Zn24Ni24Ag8Hg4 high entropy alloy with antibacterial properties 多尺度建模驱动合成具有抗菌性能的 Cu40Zn24Ni24Ag8Hg4 高熵合金
IF 5.45 Q1 Physics and Astronomy Pub Date : 2024-10-25 DOI: 10.1016/j.nanoso.2024.101391
Prince Sharma , Sahil Rohila , Uzma Hasan , P. Hari Krishna , Chima Ugwuegbu , Abhishek Tiwari , Manish Joshi
High-entropy alloys (HEAs) are promising materials across various sectors, yet their potential as antibacterial powders remain underexplored. In this study, we synthesized a novel Cu-Zn-Ni-Ag-Hg-based HEA using CALPHAD and DFT methods coupled with mechanical alloying. The HEA's antibacterial efficacy against Staphylococcus aureus (S. aureus) and Escherichia coli (E. Coli) was systematically evaluated. Computational and experimental analyses confirmed the HEA's single-phase FCC structure. Mechanical alloying for 8 h facilitated the formation of the single-phase HEA, with Ni and Cu initially dissolving into each other, followed by Zn, Ag, and Hg. Antibacterial testing demonstrated minimum inhibitory concentrations of 400 µg/mL for S. aureus and 600 µg/mL for E. coli, highlighting the broad-spectrum antibacterial properties of the synthesized HEA. These results underscore the potential of HEAs in advancing antibacterial materials for biomedical applications.
高熵合金(HEAs)是各行各业都很有前景的材料,但其作为抗菌粉末的潜力仍未得到充分开发。在本研究中,我们采用 CALPHAD 和 DFT 方法以及机械合金化技术合成了一种新型铜-锌-镍-镁-汞基高熵合金。我们系统地评估了 HEA 对金黄色葡萄球菌和大肠杆菌的抗菌效果。计算和实验分析证实了 HEA 的单相 FCC 结构。8 小时的机械合金化促进了单相 HEA 的形成,镍和铜开始相互溶解,随后是锌、银和汞。抗菌测试表明,金黄色葡萄球菌的最低抑菌浓度为 400 µg/mL,大肠杆菌的最低抑菌浓度为 600 µg/mL,这凸显了合成 HEA 的广谱抗菌特性。这些结果凸显了 HEA 在推动生物医学应用抗菌材料方面的潜力。
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引用次数: 0
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Nano-Structures & Nano-Objects
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