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Microwave Assisted Biosynthesis of Silver Nanoparticles Using the Rhizome Extract of Alpinia galanga and Evaluation of Their Catalytic and Antimicrobial Activities 高良姜根茎提取物微波辅助合成纳米银及其催化抑菌活性评价
Journal of Nanoparticles Pub Date : 2014-05-13 DOI: 10.1155/2014/967802
Siby Joseph, B. Mathew
{"title":"Microwave Assisted Biosynthesis of Silver Nanoparticles Using the Rhizome Extract of Alpinia galanga and Evaluation of Their Catalytic and Antimicrobial Activities","authors":"Siby Joseph, B. Mathew","doi":"10.1155/2014/967802","DOIUrl":"https://doi.org/10.1155/2014/967802","url":null,"abstract":"Biomediated methods are considered to be a safer alternative to conventional physicochemical methods for the fabrication of nanomaterials due to their eco-friendly nature. In the present study, silver nanoparticles (AgNPs) were synthesized by microwave irradiation using aqueous rhizome extract of the medicinal plant Alpinia galanga. The nanoparticles were also synthesized under ambient condition without the assistance of microwave radiation and the former method was found to be much faster than the latter. The silver nanoparticles were characterized by UV-vis., FTIR, XRD, and HR-TEM analysis. UV-vis. spectroscopic studies provided ample evidences for the formation of nanoparticles. The FTIR spectrum confirmed the presence of plant phytochemicals as stabilizing agent around the AgNPs. XRD and HR-TEM analyses clearly proved the crystalline nature of the nanoparticles. From the TEM images, the nanoparticles were found to be roughly spherical in shape with an average diameter of 20.82 ± 1.8 nm. The nanoparticles showed outstanding catalytic activity for the reduction of methyl orange by NaBH4. The AgNPs were also evaluated for their antimicrobial activity by well diffusion method against S. aureus, B. subtilis, V. cholera, S. paratyphi, and A. niger. They were found to be highly toxic against all the tested pathogenic strains.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"51 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2014-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84187122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 46
Copper Oxide Nanoparticles for Advanced Refrigerant Thermophysical Properties: Mathematical Modeling 用于先进制冷剂热物理性质的氧化铜纳米颗粒:数学建模
Journal of Nanoparticles Pub Date : 2014-04-30 DOI: 10.1155/2014/890751
S. Fadhilah, R. Marhamah, A. Izzat
{"title":"Copper Oxide Nanoparticles for Advanced Refrigerant Thermophysical Properties: Mathematical Modeling","authors":"S. Fadhilah, R. Marhamah, A. Izzat","doi":"10.1155/2014/890751","DOIUrl":"https://doi.org/10.1155/2014/890751","url":null,"abstract":"In modern days, refrigeration systems are important for industrial and domestic applications. The systems consume more electricity as compared to other appliances. The refrigeration systems have been investigated thoroughly in many ways to reduce the energy consumption. Hence, nanorefrigerant which is one kind of nanofluids has been introduced as a superior properties refrigerant that increased the heat transfer rate in the refrigeration system. Many types of materials could be used as the nanoparticles to be suspended into the conventional refrigerants. In this study, the effect of the suspended copper oxide (CuO) nanoparticles into the 1,1,1,2-tetrafluoroethane, R-134a is investigated by using mathematical modeling. The investigation includes the thermal conductivity, dynamic viscosity, and heat transfer rate of the nanorefrigerant in a tube of evaporator. The results show enhanced thermophysical properties of nanorefrigerant compared to the conventional refrigerant. These advanced thermophysical properties increased the heat transfer rate in the tube. The nanorefrigerant could be a potential working fluid to be used in the refrigeration system to increase the heat transfer characteristics and save the energy usage.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"25 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2014-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78799675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 39
Influence of Gas Sort on the Nucleation Region Width of Si Nanocrystal Grains Prepared by Pulsed Laser Ablation 气体种类对脉冲激光烧蚀制备硅纳米晶成核区宽度的影响
Journal of Nanoparticles Pub Date : 2014-03-30 DOI: 10.1155/2014/760712
Z. Deng, L. Chu, Xuecheng Ding, Aili Qin, G. Fu, Ying-long Wang
{"title":"Influence of Gas Sort on the Nucleation Region Width of Si Nanocrystal Grains Prepared by Pulsed Laser Ablation","authors":"Z. Deng, L. Chu, Xuecheng Ding, Aili Qin, G. Fu, Ying-long Wang","doi":"10.1155/2014/760712","DOIUrl":"https://doi.org/10.1155/2014/760712","url":null,"abstract":"We have calculated the nucleation region (NR) location of Si nanocrystal grains prepared by pulsed laser ablation (PLA) with fluence of 4 J/cm2 in 10 Pa gas at room temperature, and ambient gases were He, Ne, and Ar, respectively. Results of calculation indicated that NR width in Ne gas was narrowest, while it was widest in He gas. Maximum mean size of grains deposited on substrates under ablated spot, which were placed horizontally, was the smallest in Ne gas. It would be attribute to more effective energy transfer during the process of collision when atomic mass of Si and ambient gas Ne are more close to each other. In this work, an additional gas flow with the same element as ambient gas was introduced, which is vertical to the plume axis at different lateral positions above ablated spot.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"64 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2014-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84781303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Green Chemistry Based Benign Routes for Nanoparticle Synthesis 基于绿色化学的纳米颗粒合成良性途径
Journal of Nanoparticles Pub Date : 2014-03-24 DOI: 10.1155/2014/302429
Parth Malik, R. Shankar, V. Malik, N. Sharma, T. Mukherjee
{"title":"Green Chemistry Based Benign Routes for Nanoparticle Synthesis","authors":"Parth Malik, R. Shankar, V. Malik, N. Sharma, T. Mukherjee","doi":"10.1155/2014/302429","DOIUrl":"https://doi.org/10.1155/2014/302429","url":null,"abstract":"Green chemistry has been an eye catching area of interest since the past few years. With the problem of energy crisis looming high and its constraint being particularly vulnerable on the developing economies, the need for giving alternative traditional chemistry a serious consideration as well as adequate room for development has received significant boost through the coveted efforts of multidisciplinary and interdisciplinary scientific fields. Nanoscience has been the right field in this dimension as it opens up the door to multiple opportunities through enabling a number of chemical, biochemical, and biophysical transformations in a significantly easier and reliable manner. The use of nanoparticles has made the fields of catalysis, synthesis, and enzyme immobilizations as well as molecular interactions a lot much easier, rapid and easily controllable. This review article sheds light on the popular alternative synthesis routes being employed for the synthesis of nanoparticles, the pivotal being from microbes, plants, and chemical routes via sonication, microwaving, and many others.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"9 1","pages":"1-14"},"PeriodicalIF":0.0,"publicationDate":"2014-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79987177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 267
Performance of Water-Based Zinc Oxide Nanoparticle Coolant during Abrasive Grinding of Ductile Cast Iron 水基氧化锌纳米粒子冷却剂在球墨铸铁磨料磨削中的性能
Journal of Nanoparticles Pub Date : 2014-03-05 DOI: 10.1155/2014/175896
M. Rahman, K. Kadirgama
{"title":"Performance of Water-Based Zinc Oxide Nanoparticle Coolant during Abrasive Grinding of Ductile Cast Iron","authors":"M. Rahman, K. Kadirgama","doi":"10.1155/2014/175896","DOIUrl":"https://doi.org/10.1155/2014/175896","url":null,"abstract":"This paper presents the performance of ductile cast iron grinding machining using water-based zinc oxide nanoparticles as a coolant. The experimental data was utilized to develop the mathematical model for first- and second-order models. The second order gives worthy performance of the grinding. The results indicate that the optimum parameters for the grinding model are 20 m/min table speed and 42.43 μm depth of cut for single-pass grinding. For multiple-pass grinding, optimization is at a table speed equal to 35.11 m/min and a depth of cut equal to 29.78 μm. The model fit was adequate and acceptable for sustainable grinding using a 0.15% volume concentration of zinc oxide nanocoolant. This paper quantifies the impact of water-based ZnO nanoparticle coolant on the achieved surface quality. It is concluded that the surface quality is the most influenced by the depth of cut(s) and table speed.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"1 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2014-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90772034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
The Mode of Action of Silver and Silver Halides Nanoparticles against Saccharomyces cerevisiae Cells 银和卤化银纳米颗粒对酿酒酵母细胞的作用模式
Journal of Nanoparticles Pub Date : 2014-02-13 DOI: 10.1155/2014/568635
A. Kudrinskiy, A. Ivanov, E. Kulakovskaya, A. Klimov, P. Zherebin, D. V. Khodarev, Anh-Tuan Le, L. T. Tam, G. Lisichkin, Y. Krutyakov
{"title":"The Mode of Action of Silver and Silver Halides Nanoparticles against Saccharomyces cerevisiae Cells","authors":"A. Kudrinskiy, A. Ivanov, E. Kulakovskaya, A. Klimov, P. Zherebin, D. V. Khodarev, Anh-Tuan Le, L. T. Tam, G. Lisichkin, Y. Krutyakov","doi":"10.1155/2014/568635","DOIUrl":"https://doi.org/10.1155/2014/568635","url":null,"abstract":"Silver and silver halides nanoparticles (NPs) (Ag, AgCl, AgBr, and AgI) capped with two different stabilizers (sodium citrate and nonionic surfactant Tween 80) were obtained via sodium borohydride reduction of silver nitrate in an aqueous solution. The effect of the biocidal action of as-prepared synthesized materials against yeast cells Saccharomyces cerevisiae was compared to the effect produced by silver nitrate and studied through the measurement of cell loss and kinetics of K","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"58 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2014-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85167724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Nanoparticles: Workhorses of Nanoscience 纳米粒子:纳米科学的主力
Journal of Nanoparticles Pub Date : 2014-01-01 DOI: 10.1007/978-3-662-44823-6
C. M. Donegá, Springer
{"title":"Nanoparticles: Workhorses of Nanoscience","authors":"C. M. Donegá, Springer","doi":"10.1007/978-3-662-44823-6","DOIUrl":"https://doi.org/10.1007/978-3-662-44823-6","url":null,"abstract":"","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74970374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 38
Small Angle X-Ray Scattering Technique for the Particle Size Distribution of Nonporous Nanoparticles 无孔纳米颗粒粒径分布的小角x射线散射技术
Journal of Nanoparticles Pub Date : 2013-12-22 DOI: 10.1155/2013/640436
A. Agbabiaka, M. Wiltfong, Chiwoo Park
{"title":"Small Angle X-Ray Scattering Technique for the Particle Size Distribution of Nonporous Nanoparticles","authors":"A. Agbabiaka, M. Wiltfong, Chiwoo Park","doi":"10.1155/2013/640436","DOIUrl":"https://doi.org/10.1155/2013/640436","url":null,"abstract":"Nanoparticles are small particles whose sizes are less than 100 nm. They have many industrial applications due to their unique properties. Their properties are often size-dependent; thus the accurate determination of nanoparticle sizes is important for quality assurance of nanoparticle production processes. A small angle X-ray scattering technique is a promising method used for characterizing nanoparticle sizes. It has distinctive advantages over other techniques such as electron microscope techniques. In this paper, we review the state-of-the-art methods for determining the sizes of nanoparticles with small angle X-ray experiments and discuss the advantages and limitations of the state-of-the-art methods.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"9 1","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2013-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79141778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 38
Magnetization and Specific Absorption Rate Studies of Ball-Milled Iron Oxide Nanoparticles for Biomedicine 生物医学用球磨氧化铁纳米颗粒的磁化及比吸收率研究
Journal of Nanoparticles Pub Date : 2013-09-28 DOI: 10.1155/2013/181820
Philip Burnham, N. Dollahon, Calvin H. Li, A. J. Viescas, G. Papaefthymiou
{"title":"Magnetization and Specific Absorption Rate Studies of Ball-Milled Iron Oxide Nanoparticles for Biomedicine","authors":"Philip Burnham, N. Dollahon, Calvin H. Li, A. J. Viescas, G. Papaefthymiou","doi":"10.1155/2013/181820","DOIUrl":"https://doi.org/10.1155/2013/181820","url":null,"abstract":"Comparative studies are presented of iron oxide nanoparticles in the 7–15 nm average diameter range ball milled in hexane in the presence of oleic acid. Transmission electron microscopy identified spherical particles of decreasing size as milling time and/or surfactant concentration increased. Micromagnetic characterization via Mossbauer spectroscopy at room temperature yielded broadened magnetic spectroscopic signatures, while macromagnetic characterization via vibrating sample magnetometry of 7-8 nm diameter particles showed largely superparamagnetic behavior at room temperature and hysteretic at 2 K. Zero-field and field-cooled magnetization curves exhibited a broad maximum at ~215 K indicating the presence of strong interparticle magnetic interactions. The specific absorption rates of ferrofluids based on these nanoparticle preparations were measured in order to test their efficacies as hyperthermia agents.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"167 1","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2013-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80495389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
Characterization and Modification of Mesoporous Silica Nanoparticles Prepared by Sol-Gel 溶胶-凝胶法制备介孔二氧化硅纳米颗粒的表征与改性
Journal of Nanoparticles Pub Date : 2013-09-25 DOI: 10.1155/2013/102823
Meysam Keshavarz, N. Ahmad
{"title":"Characterization and Modification of Mesoporous Silica Nanoparticles Prepared by Sol-Gel","authors":"Meysam Keshavarz, N. Ahmad","doi":"10.1155/2013/102823","DOIUrl":"https://doi.org/10.1155/2013/102823","url":null,"abstract":"Mesoporous silica nanoparticles (MSNs) were synthesized by sol-gel reaction at normal pressure by using TEOS as a silica source and CTAB as a directing agent in ammonia solution at 323 K subsequently calcined at 823 K. Then inorganic pores were modified with metal-supported MSN with attention to the acidity, surface area, pore size, and ability of ion exchange. Crystalline size was shown to decrease up to 20 molar ratios of Si/Al followed by increasing while further adding nanoparticles-aluminium. Moreover, the XRD patterns revealed the mesostructured material for all with 2D hexagonal structure. The obtained results from the XRD patterns were confirmed by using BET and EDX. The BET surface areas revealed the spherical shape for all samples with a decrease in the pore volume and surface area for various AlMSNs which emphasized that the loading of Al and was compatible with XRD results. MSN was prepared by sol-gel methods followed by loading of Al in order to prepare AlMSN which possess strong Lewis acidic sites. This modification occurred by using various molar ratios of 0, 5, 10, 20, 50, and 100 Si/Al, respectively. The XRD patterns of various ratios of Si/Al were interpreted in terms of strain, nanocrystalline size, and distribution of the particle size by deriving Wiliamson Hall equation.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"44 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2013-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77531880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
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