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Width of Nucleation Region of Si Nanocrystal Grains Prepared by Pulsed Laser Ablation with Different Laser Fluence 不同激光辐照强度下脉冲激光烧蚀制备硅纳米晶的成核区宽度
Journal of Nanoparticles Pub Date : 2015-03-23 DOI: 10.1155/2015/105685
Z. Deng, X. Pang, Xuecheng Ding, L. Chu, Ying-long Wang
{"title":"Width of Nucleation Region of Si Nanocrystal Grains Prepared by Pulsed Laser Ablation with Different Laser Fluence","authors":"Z. Deng, X. Pang, Xuecheng Ding, L. Chu, Ying-long Wang","doi":"10.1155/2015/105685","DOIUrl":"https://doi.org/10.1155/2015/105685","url":null,"abstract":"Si nanocrystal grains were prepared by pulsed laser ablation with different laser fluence in Ar gas of 10 Pa at room temperature. The as-formed grains in the space deposited on the substrates and distributed in a certain range apart from target. According to the depositing position and radius of grains, the nucleation locations of grains in the space were roughly calculated. The results indicated that the width of nucleation region broadened with increasing of ion densities diagnosed by Langmuir probe, which increased with laser fluence from 2 J/cm2 to 6 J/cm2; that is, width of nucleation region broadened with addition of laser fluence. At the same time, the width broadened with the terminal formation position moving backward and the initial formation position of grains moving toward ablated spot. The experimental results were explained reasonably by nucleation thermokinetic theory.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"16 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73318449","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
Issues Affecting the Synthetic Scalability of Ternary Metal Ferrite Nanoparticles 影响三元金属铁氧体纳米颗粒合成可扩展性的问题
Journal of Nanoparticles Pub Date : 2015-01-01 DOI: 10.1155/2015/105862
Lauren Morrow, A. Barron
{"title":"Issues Affecting the Synthetic Scalability of Ternary Metal Ferrite Nanoparticles","authors":"Lauren Morrow, A. Barron","doi":"10.1155/2015/105862","DOIUrl":"https://doi.org/10.1155/2015/105862","url":null,"abstract":"Ternary Mn-Zn ferrite (MnxZn1-xFe2O4) nanoparticles (NPs) have been prepared by the thermal decomposition of an oleate complex, sodium dodecylbenzenesulfonate (SDBS) mediated hydrazine decomposition of the chloride salts, and triethylene glycol (TREG) mediated thermal decomposition of the metal acetylacetonates. Only the first method was found to facilitate the synthesis of uniform, isolable NPs with the correct Mn : Zn ratio (0.7 : 0.3) as characterized by small angle X-ray scattering (SAXS), transmission electron microscopy (TEM), and inductively coupled plasma-optical emission spectroscopy (ICP-OES). Scaling allowed for retention of the composition and size; however, attempts to prepare Zn-rich ferrites did not result in NP formation. Thermogravimetric analysis (TGA) indicated that the incomplete decomposition of the metal-oleate complexes prior to NP nucleation for Zn-rich compositions is the cause.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"82 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74280698","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: 5
Carbon Dot Based Sensing of Dopamine and Ascorbic Acid 基于碳点的多巴胺和抗坏血酸传感
Journal of Nanoparticles Pub Date : 2014-12-29 DOI: 10.1155/2014/178518
Upama Baruah, Neelam Gogoi, Achyut Konwar, M. Deka, D. Chowdhury, G. Majumdar
{"title":"Carbon Dot Based Sensing of Dopamine and Ascorbic Acid","authors":"Upama Baruah, Neelam Gogoi, Achyut Konwar, M. Deka, D. Chowdhury, G. Majumdar","doi":"10.1155/2014/178518","DOIUrl":"https://doi.org/10.1155/2014/178518","url":null,"abstract":"We demonstrate carbon dot based sensor of catecholamine, namely, dopamine and ascorbic acid. Carbon dots (CDs) were prepared from a green source: commercially available Assam tea. The carbon dots prepared from tea had particle sizes of ∼0.8 nm and are fluorescent. Fluorescence of the carbon dots was found to be quenched in the presence of dopamine and ascorbic acid with greater sensitivity for dopamine. The minimum detectable limits were determined to be 33 μM and 98 μM for dopamine and ascorbic acid, respectively. The quenching constants determined from Stern-Volmer plot were determined to be 5 × 10−4 and 1 × 10−4 for dopamine and ascorbic acid, respectively. A probable mechanism of quenching has been discussed in the paper.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"66 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87153333","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: 56
Synthesis of Platinum Nanoparticles from K2PtCl4 Solution Using Bacterial Cellulose Matrix 利用细菌纤维素基质从K2PtCl4溶液合成纳米铂
Journal of Nanoparticles Pub Date : 2014-12-14 DOI: 10.1155/2014/285954
H. Aritonang, D. Onggo, C. Ciptati, C. Radiman
{"title":"Synthesis of Platinum Nanoparticles from K2PtCl4 Solution Using Bacterial Cellulose Matrix","authors":"H. Aritonang, D. Onggo, C. Ciptati, C. Radiman","doi":"10.1155/2014/285954","DOIUrl":"https://doi.org/10.1155/2014/285954","url":null,"abstract":"Platinum (Pt) nanoparticles have been synthesized from a precursor solution of potassium tetrachloroplatinate (K2PtCl4) using a matrix of bacterial cellulose (BC). The formation of Pt nanoparticles occurs at the surface and the inside of the BC membrane by reducing the precursor solution with a hydrogen gas reductant. The Pt nanoparticles obtained from the variations of precursor concentration, between 3 mM and 30 mM, and the formation of Pt nanoparticles have been studied using X-ray diffraction (XRD), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), and thermogravimetry analysis (TGA). Based on X-ray diffraction patterns, Pt particles have sizes between 6.3 nm and 9.3 nm, and the Pt particle size increases with an increase in precursor concentration. The morphology of the Pt nanoparticles was observed by SEM-EDS and the content of Pt particles inside the membrane is higher than that on the surface of BC membranes. This analysis corresponds to the TGA analysis, but the TGA analysis is more representative in how it describes the content of Pt particles in the BC membrane.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"28 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2014-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86900066","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: 26
Aqueous Colloidal Stability of Graphene Oxide and Chemically Converted Graphene 氧化石墨烯和化学转化石墨烯的水性胶体稳定性
Journal of Nanoparticles Pub Date : 2014-11-13 DOI: 10.1155/2014/640281
S. Kashyap, Shashank Mishra, S. Behera
{"title":"Aqueous Colloidal Stability of Graphene Oxide and Chemically Converted Graphene","authors":"S. Kashyap, Shashank Mishra, S. Behera","doi":"10.1155/2014/640281","DOIUrl":"https://doi.org/10.1155/2014/640281","url":null,"abstract":"Graphene oxide (GO) was prepared by modified Hummer’s method, and chemically converted graphene (CCG) was prepared by further reduction of the aqueous GO colloid. The effect of pH on particle size, particle charge, and light absorption of the aqueous colloids of GO and CCG was studied with titration against HCl or NaOH, to find the ideal characteristics for a stable dispersion. The GO colloid was stable in the pH range of 4–11, whereas the CCG colloid gained stability at a relatively narrower pH range of 7–10. Poor stability of the colloids was observed for both GO and CCG colloids at both extremes of the pH scale. Both of the colloids exhibited average size of ~1 micron in the low pH range, whereas for higher pH the size ranged between 300 and 500 nm. The UV-Vis spectra showed absorption peak at 230 nm for GO colloids that shifted to 260 nm for the CCG colloid. Such shift can be ascribed to restoring of electronic conjugation of the C=C bonds in CCG.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81529308","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: 85
Spectropolarimetric Properties of a Gallium Nanoparticle Layer on a Sapphire Substrate 蓝宝石衬底上镓纳米颗粒层的光谱偏振特性
Journal of Nanoparticles Pub Date : 2014-11-02 DOI: 10.1155/2014/408350
Prashanth Raman, K. Fuller, D. Gregory
{"title":"Spectropolarimetric Properties of a Gallium Nanoparticle Layer on a Sapphire Substrate","authors":"Prashanth Raman, K. Fuller, D. Gregory","doi":"10.1155/2014/408350","DOIUrl":"https://doi.org/10.1155/2014/408350","url":null,"abstract":"Gallium nanoparticles (Ga NPs) are currently the subject of vigorous research as possible substrates in surface-enhanced Raman scattering (SERS) experiments in the ultraviolet spectral domain. Verification of any comprehensive model of the interaction of electromagnetic radiation with Ga NPs requires that complete polarimetric measurements be made. These spectropolarimetric properties can be obtained using a Mueller matrix spectropolarimeter (MMSP). The position of localized surface plasmon resonances (LSPRs) and spectral depolarization data of Ga NPs in the 300 to 1100 nm spectral region are presented. Spectral depolarization data may be of value in creating a better understanding of how light couples to individual nanoparticles, as well as the role played by interparticle coupling and the connection to phenomena such as SERS.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"33 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2014-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86536037","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: 2
Plasmonic and Thermooptical Properties of Spherical Metallic Nanoparticles for Their Thermoplasmonic and Photonic Applications 球形金属纳米颗粒的热等离子体和热光学性质及其在热等离子体和光子方面的应用
Journal of Nanoparticles Pub Date : 2014-10-14 DOI: 10.1155/2014/893459
V. Pustovalov, L. Astafyeva, W. Fritzsche
{"title":"Plasmonic and Thermooptical Properties of Spherical Metallic Nanoparticles for Their Thermoplasmonic and Photonic Applications","authors":"V. Pustovalov, L. Astafyeva, W. Fritzsche","doi":"10.1155/2014/893459","DOIUrl":"https://doi.org/10.1155/2014/893459","url":null,"abstract":"Investigations and use of nanoparticles (NPs) as photothermal (PT) agents in laser and optical nanotechnology are fast growing areas of research and applications. The potential benefits of NPs applications include possibility for thermal imaging and treatment of materials containing of NPs, applications of NPs for light-to-thermal energy conversion, in catalysis, laser nanomedicine, and chemistry. Efficiency of applications of metallic NPs for laser and optical nanotechnology depends on plasmonic and thermophysical properties of NPs, characteristics of radiation, and surrounding medium. Here we present the results of comparative analysis of NP properties (plasmonic, thermooptical, and others) allowing selecting their parameters for thermoplasmonic and photonic applications. Plasmonic and thermooptical properties of several metallic (aurum, silver, platinum, cobalt, zinc, nickel, titanium, cuprum, aluminum, molybdenum, vanadium, and palladium) NPs are theoretically investigated and analysis of them is carried out. Investigation of the influence of NPs parameters (type of metal, radii, optical indexes, density, and heat capacity of NP material), characteristics of radiation (wavelength and pulse duration), and ambient parameters on plasmonic and thermophysical properties of NPs has been carried out. It was established that maximum value of thermooptical parameter (maximum NP temperature) can be achieved with the use of absorption efficiency factor of NP smaller than its maximum value.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"29 1","pages":"1-15"},"PeriodicalIF":0.0,"publicationDate":"2014-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86219449","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: 6
Plant-Mediated Green Synthesis of Iron Nanoparticles 植物介导的铁纳米颗粒绿色合成
Journal of Nanoparticles Pub Date : 2014-10-02 DOI: 10.1155/2014/140614
M. Herlekar, S. Barve, Rakesh Kumar
{"title":"Plant-Mediated Green Synthesis of Iron Nanoparticles","authors":"M. Herlekar, S. Barve, Rakesh Kumar","doi":"10.1155/2014/140614","DOIUrl":"https://doi.org/10.1155/2014/140614","url":null,"abstract":"In the recent years, nanotechnology has emerged as a state-of-the-art and cutting edge technology with multifarious applications in a wide array of fields. It is a very broad area comprising of nanomaterials, nanotools, and nanodevices. Amongst nanomaterials, majority of the research has mainly focused on nanoparticles as they can be easily prepared and manipulated. Physical and chemical methods are conventionally used for the synthesis of nanoparticles; however, due to several limitations of these methods, research focus has recently shifted towards the development of clean and eco-friendly synthesis protocols. Magnetic nanoparticles constitute an important class of inorganic nanoparticles, which find applications in different areas by virtue of their several unique properties. Nevertheless, in comparison with biological synthesis protocols for noble metal nanoparticles, limited study has been carried out with respect to biological synthesis of magnetic nanoparticles. This review focuses on various studies outlining the novel routes for biosynthesis of these nanoparticles by plant resources along with outlining the future scope of work in this area.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"15 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77098771","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: 239
Synthesis of Silver Nanoparticles in Photosynthetic Plants 纳米银在光合植物中的合成
Journal of Nanoparticles Pub Date : 2014-09-25 DOI: 10.1155/2014/963961
R. Prasad
{"title":"Synthesis of Silver Nanoparticles in Photosynthetic Plants","authors":"R. Prasad","doi":"10.1155/2014/963961","DOIUrl":"https://doi.org/10.1155/2014/963961","url":null,"abstract":"Nanobiotechnology is emerging as a field of applied biological science and nanotechnology. Synthesis of nanoparticles is done by various physical and chemical methods but the biological methods are relatively simple, cost-effective, nontoxic, and environmentally friendly methods. The present review focuses on the synthesis of nanoparticles with special emphasis on the use of plants parts for the synthesis process, its applications, and future prospectus.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"1 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2014-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87880179","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: 316
Preparation of Cerium Orthophosphate Nanosphere by Coprecipitation Route and Its Structural, Thermal, Optical, and Electrical Characterization 共沉淀法制备正磷酸铈纳米球及其结构、热、光学和电学表征
Journal of Nanoparticles Pub Date : 2014-09-16 DOI: 10.1155/2014/125360
S. Verma, K. Bamzai
{"title":"Preparation of Cerium Orthophosphate Nanosphere by Coprecipitation Route and Its Structural, Thermal, Optical, and Electrical Characterization","authors":"S. Verma, K. Bamzai","doi":"10.1155/2014/125360","DOIUrl":"https://doi.org/10.1155/2014/125360","url":null,"abstract":"Cerium orthophosphate (CePO4) nanoparticles were synthesized via wet chemical coprecipitation technique using cerium nitrate hexahydrate for Ce3","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"98 1","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2014-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90008608","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: 26
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