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Silver Nanoparticles - Fabrication, Characterization and Applications最新文献

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Synthesis of Silver Nanoparticles 纳米银的合成
Pub Date : 2018-07-18 DOI: 10.5772/INTECHOPEN.75363
Remziye Güzel, G. Erdal
Nanoparticles of noble metals, especially the silver nanoparticles, have been widely used in different fields of science. Their unique properties, which can be incorporated into biosensor materials, composite fibers, cosmetic products, antimicrobial applications, con - ducting materials and electronic components, make them a very important subject to be studied by chemistry, biology, healthcare, electronic and other related branches. These unique properties depend upon size and shape of the silver nanoparticles. Different preparation methods have been reported for the synthesis of the silver nanoparticles, such as electron irradiation, laser ablation, chemical reduction, biological artificial meth -ods, photochemical methods and microwave processing. This chapter aims to inform the synthesis methods of the silver nanoparticles.
贵金属纳米粒子,特别是银纳米粒子,已广泛应用于不同的科学领域。其独特的性能,可用于生物传感器材料,复合纤维,化妆品,抗菌应用,导电材料和电子元件,使其成为化学,生物学,医疗保健,电子和其他相关分支研究的非常重要的课题。这些独特的性质取决于银纳米颗粒的大小和形状。制备纳米银的方法有电子辐照法、激光烧蚀法、化学还原法、生物人工法、光化学法和微波法等。本章主要介绍纳米银的合成方法。
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引用次数: 147
Silver Nanoparticles: Synthesis, Characterization and Applications 纳米银:合成、表征及应用
Pub Date : 2018-07-18 DOI: 10.5772/INTECHOPEN.75611
N. Chouhan
Day by day augmenting importance of metal nanoparticles in the versatile fields like, catalyst, electronic, magnetic, mechanic, optical optoelectronic, materials for solar cell and fuel cell, medical, bioimaging, cosmetic, ultrafast data communication and optical data storage, etc, is increasing their value. Nanoparticles of alkali metals and noble metals (copper, silver, platinum, palladium, and gold, etc.) have a broad absorption band in the visible region of the electromagnetic spectrum of light, because the solutions of these metal nanoparticles show the intense color, which is absent in their bulk counterparts as well as their atomic level. The main cause behind this phenomenon is attributed to the collective oscillations of the free conductive electrons that are induced by an interaction with electromagnetic field. The whole incidence is known as localized surface plasmonic resonance. Out of these, we have selected the silver nanoparticles for the studies. In this article, we will discuss the synthesis, characterization, and application of the silver nanoparticles. Future prospective and challenges in the field commercialization of the nanosilver is also discussed.
金属纳米颗粒在催化剂、电子、磁性、机械、光学光电、太阳能电池和燃料电池材料、医学、生物成像、化妆品、超快数据通信和光数据存储等多用途领域的重要性日益增强,其价值也在不断提高。碱金属和贵金属(铜、银、铂、钯和金等)的纳米粒子在电磁光谱的可见区域有很宽的吸收带,因为这些金属纳米粒子的溶液显示出强烈的颜色,这在它们的体积对应物和原子水平上是不存在的。这一现象背后的主要原因归因于自由导电电子的集体振荡,这些振荡是由电磁场相互作用引起的。整个过程称为局部表面等离子体共振。从中,我们选择了银纳米粒子进行研究。本文将讨论纳米银的合成、表征及其应用。最后讨论了纳米银的应用前景和面临的挑战。
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引用次数: 67
Assessment of Nano-toxicity and Safety Profiles of Silver Nanoparticles 纳米银的纳米毒性及安全性评价
Pub Date : 2018-07-18 DOI: 10.5772/INTECHOPEN.75645
Yasemin Budama-Kilinc, Rabia Cakır-Koc, T. Zorlu, Burak Ozdemir, Z. Karavelioglu, Abdurrahim Can Egil, S. Kecel-Gunduz
Nanotoxicology, which is related with toxic potentials of nanoparticles (NPs) and their adverse effects on living organisms and environment, is a sub-branch of toxicology discipline. Nano-toxicity of NPs depends on their doses, unique chemical, and physical prop- erties. Nowadays, silver (Ag) NPs are used in many consumer and scientific applications such as antimicrobial and pharmaceutical applications, water purification systems, tex- tile industry, and food packaging processes. However, the information that about their nano-toxic potentials is still not complete, and it is considered that several parameters of Ag NPs such as size, shape, surface, and stability affect the toxic potential in different ways. Nano-toxic potentials of Ag NPs were mentioned as in vivo , in vitro and in silico the studies. In this chapter, it was evaluated the common unique properties of NPs are related with nanotoxicology such as size, surface area and modifications, shape, agglomeration status, dose.
纳米毒理学是毒理学的一个分支学科,主要研究纳米颗粒的潜在毒性及其对生物和环境的不良影响。NPs的纳米毒性取决于它们的剂量、独特的化学和物理性质。如今,银(Ag) NPs被用于许多消费和科学应用,如抗菌和制药应用,水净化系统,纺织工业和食品包装工艺。然而,关于其纳米毒性电位的信息仍然不完整,并且认为Ag NPs的几个参数如尺寸、形状、表面和稳定性等以不同的方式影响毒性电位。本文从体内、体外和计算机实验三个方面介绍了银纳米粒子的纳米毒性。在本章中,评估了NPs与纳米毒理学相关的常见独特性质,如尺寸,表面积和修饰,形状,团聚状态,剂量。
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引用次数: 19
Exploring the Effect of Operational Factors and Characterization Imperative to the Synthesis of Silver Nanoparticles 探索操作因素和表征对银纳米粒子合成的影响
Pub Date : 2018-07-18 DOI: 10.5772/INTECHOPEN.76947
A. O. Dada, F. A. Adekola, O. Adeyemi, O. Bello, C. Adetunji, O. J. Awakan, A. G. Femi-Adepoju
The synthesis and application of silver nanoparticles are increasingly becoming attractive. Hence, a critical examination of the various factors needed for the synthesis of silver nanoparticles as well as the characterization is imperative. In light of this, we addressed in this chapter, the nitty-gritty on the operational parameters (factors) and characterization relevant to synthesis of silver nanoparticle. The following characterization protocols were discussed in the context of silver nanoparticle synthesis. These protocols include spectroscopic techniques such as ultraviolet visible spectroscopy (UV–Vis), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray fluorescence (XRF), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). Keywords: silver nanoparticles, characterization, morphology, operational factors
纳米银的合成和应用越来越受到人们的关注。因此,对银纳米颗粒合成和表征所需的各种因素进行严格检查是必要的。鉴于此,我们在本章中讨论了与银纳米颗粒合成相关的操作参数(因素)和表征的本质。在纳米银合成的背景下,讨论了以下表征方案。这些协议包括光谱技术,如紫外可见光谱(UV-Vis)、傅里叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、能量色散x射线光谱(EDX)、x射线荧光(XRF)、x射线衍射(XRD)、热重分析(TGA)和x射线光电子能谱(XPS)。关键词:纳米银,表征,形貌,操作因素
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引用次数: 21
Antibacterial Effect of Silver Nanoparticles Versus Chlorhexidine Against Streptococcus mutans and Lactobacillus casei 纳米银对氯己定对变形链球菌和干酪乳杆菌的抑菌作用
Pub Date : 2018-07-18 DOI: 10.5772/INTECHOPEN.76183
R. Luckie, Rafael Lopez Casatañares, RogelioSchougall, Sarai Carmina Guadarrama Reyes, Víctor SanchezMendieta
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引用次数: 7
Silver Nanoparticles and PDMS Hybrid Nanostructure for Medical Applications 银纳米粒子和PDMS混合纳米结构的医疗应用
Pub Date : 2018-07-18 DOI: 10.5772/INTECHOPEN.74372
Solano-Umaña Victor, Vega-Baudrit José Roberto
For many years, people have known about silver’s antibacterial qualities. Silver nanoparticles are widely used in consumer products, biomedical equipment, textile products and in other applications. Having a larger surface area to coat or spread over another surface, offers a greater contact area, therefore, increases antimicrobial properties. Also, these nanoparticles can be incorporated into polydimethylsiloxane (PDMS) implants as immobilized or occluded particles to improve their performance in the body. PDMS is commonly used for biomedical applications, including components for microfluidics, catheters, implants, valves, punctual plugs, orthopedics and micro gaskets. It can be manufactured easily in different forms such as fibers, fabrics, films, blocks and porous surfaces. The use of silver nanoparticles for their antimicrobial qualities improves PDMS biocompatibility, because it inhibits microbial growth, thereby making it more attractive for biomedical applications. The presence of metal nanoparticles also helps to reduce the hydrophobic nature of PDMS. This property of PDMS does not encourage cell adhesion, which is a very critical requirement for medical implants. Silver nanoparticles improve the silicone’s wettability. The exceptional properties of silver nanoparticles combined with the PDMS have made this hybrid nanostructure applicable to different medical uses.
多年来,人们已经知道银的抗菌特性。银纳米颗粒广泛用于消费品、生物医学设备、纺织产品和其他应用。有更大的表面积涂覆或覆盖在另一个表面上,提供更大的接触面积,因此,增加抗菌性能。此外,这些纳米颗粒可以作为固定或闭塞的颗粒掺入聚二甲基硅氧烷(PDMS)植入物中,以提高其在体内的性能。PDMS通常用于生物医学应用,包括微流体,导管,植入物,阀门,准时塞,骨科和微垫圈的组件。它可以很容易地以不同的形式制造,如纤维,织物,薄膜,块和多孔表面。银纳米粒子的抗菌特性改善了PDMS的生物相容性,因为它抑制了微生物的生长,从而使其在生物医学应用方面更具吸引力。金属纳米颗粒的存在也有助于降低PDMS的疏水性。PDMS的这种特性不会促进细胞粘附,而这是医疗植入物的一个非常关键的要求。银纳米颗粒提高了硅胶的润湿性。银纳米粒子与PDMS结合的特殊性能使这种混合纳米结构适用于不同的医疗用途。
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引用次数: 3
Use of Silver Nanoparticles as Tougheners of Alumina Ceramics 纳米银作为氧化铝陶瓷增韧剂的研究
Pub Date : 2018-07-18 DOI: 10.5772/INTECHOPEN.76949
E. Rocha-Rangel, A. P. L. Fuente, J. Rodriguez-Garcia, E. Armendáriz-Mireles, C. Calles-Arriaga
In this work, alumina/silver composites were produced through powder techniques, which involve the combination of high energy mechanical milling combined with sintering in the presence of a liquid phase and with the idea of having ceramics with good toughness values. From mechanical characterizations, it was found that increases of the silver content in the alumina origins decrease the elastic’s modulus and flexural strength of the final composite. The fracture toughness of alumina increases from 4.2 MPam −0.5 for monolithic alumina to 10 MPam −0.5 for alumina with 2 wt% silver additions. It was determined that the reinforcement mechanism of these materials is due to the deflection of cracks owing to metallic bridges formed by the silver used as toughener material.
在这项工作中,氧化铝/银复合材料是通过粉末技术生产的,其中包括高能机械铣削与液相烧结的结合,以及具有良好韧性值的陶瓷的想法。力学表征表明,随着氧化铝中银含量的增加,复合材料的弹性模量和抗弯强度降低。当添加2 wt%银时,氧化铝的断裂韧性从整体氧化铝的4.2 MPam−0.5提高到10 MPam−0.5。确定了这些材料的增强机制是由于银作为增韧材料形成的金属桥引起裂纹的挠曲。
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引用次数: 0
Biological Activity of Silver Nanoparticles and Their Applications in Anticancer Therapy 纳米银的生物活性及其在抗癌治疗中的应用
Pub Date : 2018-07-18 DOI: 10.5772/INTECHOPEN.77075
M. Skonieczna, D. Hudy
Nanotechnology delivers materials and nanoparticles (NPs) with high biological poten- tial, useful in bioengineering, nanomedicine, and human health protection. Silver nanoparticles (NPs), because of their wide spectrum of activities and physical and chemi- cal properties, are nowadays extensively researched. However, careful studies on living organism should be performed, with strong attention to biocompatibility. Multiple cel- lular effects, displayed after AgNP treatments, show interesting potential of metal-based NPs, not only in bio-nanotechnology but also in molecular medicine and anticancer ther- apy. AgNPs are promising anticancer agents, influencing the cell cycle, inhibiting cancer proliferation, and inducing oxidative stress and propagation of programmed cellular death (apoptosis). Additionally, they protect against bacterial, fungal, and viral infections. During chemo- and radio-therapies, such antimicrobial protection will be desir- able because of the decreased immunological resistance of cancer patients. In conclusion, AgNPs often present in the human environment should be studied for novel findings and better characteristic. This article discusses advantages of AgNP’s “eco-friendly” production, followed by green synthesis, with particular consideration of antimicrobial and anticancer properties. Cellular processes, induced after AgNP treatments, are focused on antiproliferative, pro-oxidative, and pro-apoptotic activities of NPs.
纳米技术提供了具有高生物潜力的材料和纳米粒子(NPs),在生物工程、纳米医学和人类健康保护方面非常有用。银纳米粒子由于具有广泛的活性谱和物理化学性质,目前得到了广泛的研究。然而,应该对活的生物体进行仔细的研究,并高度重视生物相容性。经AgNP处理后的多细胞效应显示出金属基NPs的有趣潜力,不仅在生物纳米技术方面,而且在分子医学和抗癌治疗方面。AgNPs是很有前景的抗癌药物,影响细胞周期,抑制癌细胞增殖,诱导氧化应激和程序性细胞死亡(凋亡)的增殖。此外,它们还能防止细菌、真菌和病毒感染。在化疗和放疗期间,由于癌症患者的免疫抵抗力下降,这种抗菌保护将是可取的。总之,人类环境中经常存在的AgNPs应该进行新的研究,以获得新的发现和更好的特性。本文讨论了AgNP“环保”生产的优势,其次是绿色合成,特别考虑了抗菌和抗癌特性。AgNP处理后诱导的细胞过程主要集中在NPs的抗增殖、促氧化和促凋亡活性上。
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引用次数: 24
Electrochemical Formation of Silver Nanoparticles and Nanoclusters on Multiwall Carbon Nanotube Electrode Films 多壁碳纳米管电极膜上银纳米粒子和纳米团簇的电化学形成
Pub Date : 2018-07-18 DOI: 10.5772/INTECHOPEN.74056
A. A. A. Arcos, M. Miranda-Hernández
The Ag nanoparticles and nanoclusters (AgNP, AgNC) have been widely used due to their multiple applications, for example, in catalysts for CO 2 to CO electrochemical reduction, O 2 reduction in fuel cells, interface design for plasmonic resonance experi- ments and H 2 O 2 or glucose sensors. The chemical methods most used to obtain AgNP, reported in the literature are: borohydride reduction, the Tollens method or the sonication at high concentrations of AgNO 3 . One important disadvantage of these methods is the multiple steps required for electrode design, especially in carbon materials, and one of them is MWCNTs, used in some applications mentioned above. Electrodeposition has been reported in the preparation of metallic particles. In this chapter, we described the electropolishing method in the preparation of AgNP and AgNC supported on MWCNT film. An advantage of this proposed method is that it allows obtaining AgNP and AgNC in situ, supported on carbon matrices, ready to use as electrodes in different applications .
Ag纳米粒子和纳米团簇(AgNP、AgNC)由于其多种用途而得到了广泛的应用,例如在co2到CO的电化学还原催化剂、燃料电池中的o2还原、等离子体共振实验的界面设计以及h2o2或葡萄糖传感器中。在文献报道中,获得AgNP最常用的化学方法有:硼氢化物还原法、Tollens法或高浓度agno3的超声法。这些方法的一个重要缺点是电极设计需要多个步骤,特别是在碳材料中,其中一个是MWCNTs,用于上面提到的一些应用。电沉积法已被报道用于制备金属颗粒。在本章中,我们描述了电抛光法制备AgNP和MWCNT膜上负载的AgNC的方法。这种方法的一个优点是,它允许在原位获得AgNP和AgNC,支持在碳基质上,准备在不同的应用中用作电极。
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引用次数: 2
Synthesis, Characterization and Antimicrobial Properties of Silver Nanocomposites 银纳米复合材料的合成、表征及抗菌性能研究
Pub Date : 2018-04-04 DOI: 10.5772/INTECHOPEN.74623
M. Abbas, Nida Naeem, H. Iftikhar, Usman Latif
Nanoparticles and polymers in their respective fields have contributed greatly in the form of science and hence in daily life application products. But due to lack in emerging technologies for developing silver nanocomposites with polymers and other materials, the nanoparticle-based products have conquered little less attention. Hereby, an effort is made to put a light on already developed functional materials containing silver nanopar - ticles and also to look forward their scope in daily life applications. A little more insight into antimicrobial properties of such materials will also be elaborated. Finally, the opti - mal amounts of silver that cannot be health hazardous to living being especially human and overall environmental impacts of Nanocomposites are presented.
纳米粒子和聚合物在各自的领域为科学和日常生活中的应用产品做出了巨大的贡献。但是由于缺乏与聚合物和其他材料一起开发银纳米复合材料的新兴技术,纳米颗粒基产品受到的关注很少。在此,本文将重点介绍已开发的含纳米银颗粒的功能材料,并展望其在日常生活中的应用范围。对这种材料的抗菌性能也将有更多的了解。最后,提出了纳米复合材料中银的最佳用量,使其不会对生物健康造成危害,尤其是对人类和环境的整体影响。
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引用次数: 10
期刊
Silver Nanoparticles - Fabrication, Characterization and Applications
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