Nanoscience & Nanotechnology-Asia最新文献

{"title":"Preparation and Characterization of Copper Oxide Nanoparticles Through Solid State Thermal Decomposition of an Aqua Nitrato Copper(II) Complex with a Tridentate Schiff-base Ligand as a New Precursor","authors":"Niaz Monadi, S. Saeednia, P. Iranmanesh, M. H. Ardakani, S. Sinaei","doi":"10.2174/2210681207666170703160109","DOIUrl":"https://doi.org/10.2174/2210681207666170703160109","url":null,"abstract":"\u0000\u0000 In this study the synthesis and characterization of copper oxide nanoparticles\u0000via solid state thermal decomposition of a recently synthesized aqua nitrato copper(II) complex with a\u0000tridentate Schiff-base ligand (1) as a new precursor are reported.\u0000\u0000\u0000\u0000\u0000The copper complexes were obtained by sonochemical and solvothermal process\u0000and characterized by Scanning Electron Microscopy (SEM), X-ray powder Diffraction (XRD) and\u0000FT-IR spectroscopy. The thermal stability of compound (1) was studied by Thermogravimetric Analysis\u0000(TGA). The amount of initial reagents and the role of reaction time on size and morphology of\u0000nanostructure compound (1) were studied. CuO nanoparticles were simply synthesized at 500 oC under\u0000air atmosphere.\u0000\u0000\u0000\u0000\u0000The diameter of CuO nanoparticles was estimated to be about 200 and 30 nm\u0000from copper complex precursor obtained by sonochemical and solvothermal methods respectively.\u0000","PeriodicalId":18979,"journal":{"name":"Nanoscience & Nanotechnology-Asia","volume":"151 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78181550","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}

{"title":"Implications of Metal Nanoparticles on Aquatic Fauna: A Review","authors":"K. Kumari, P. Singh, K. Bauddh, Sweta, Sadhucharan Mallick, R. Chandra","doi":"10.2174/2210681208666171205101112","DOIUrl":"https://doi.org/10.2174/2210681208666171205101112","url":null,"abstract":"Nanomaterials are attractive because of these exhibits catalytic activity, optical, magnetic, electrically conducting properties and biological activities. Besides the potential economic values, the benefits offered by nanomaterials are expected to have significant impacts on almost all sectors of our society. The industries are releasing the nanoparticles into nearby water bodies like ponds, rivers, which causes toxicity to aquatic flora as well as fauna. Nanoparticles, especially which are prepared using heavy metals being toxic to organisms, ranging from phytoplankton (at the bottom of the food chain) to marine invertebrates such as oysters, snails and different types of fish, especially in their immature stages. Many species of fish and shellfish disrupts the ecosystem health on exposure to metals nanoparticles. Albeit, the academicians and researchers are trying to understand the toxicity of metal nanoparticles, particularly with respect to cascade pathways that lead to inflammatory responses, there is need to prepare and urgent implement laws to manage potential risks of nanomaterials which might become a major catastrophe in coming future.In the present review, the emphasis has given on the synthesis, characterization and toxic effects of metal nanoparticles on aquatic fauna and also the future tremendous prospects of these toxicants.","PeriodicalId":18979,"journal":{"name":"Nanoscience & Nanotechnology-Asia","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84397709","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}

{"title":"A Review Paper on Recent Trends in Bio-nanotechnology: Implications and Potentials","authors":"Gulab Khan Rohela, Y. Srinivasulu, M. S. Rathore","doi":"10.2174/2210681208666171204163015","DOIUrl":"https://doi.org/10.2174/2210681208666171204163015","url":null,"abstract":"\u0000\u0000 Nanotechnology, an advanced science discipline has proved to be vital in solving\u0000the major issues or problems, the present world is facing. Nanotechnology has already proved to be the\u0000science of revolutionizing agriculture, energy conversions, applied & medical science and other domains.\u0000\u0000\u0000 In this paper, we present the recent developments taken place in bio-nanotechnology related\u0000to different forms of nanomaterial’s developed along with their application; overcoming hazardous effects\u0000of chemical pesticides, fertilizers and herbicides by promoting green and sustainable agriculture through\u0000the use of nanofertilizers, nano pesticides and detection & control of plant diseases by using nanoparticles;\u0000development of diagnostic tools for detection and control of human diseases; targeted delivery of drugs by\u0000using nanomaterial’s, protection of the environment through nanoparticles based pollution checking,\u0000bioremediation, renewable energy production and role of nanotechnology in applied sciences.","PeriodicalId":18979,"journal":{"name":"Nanoscience & Nanotechnology-Asia","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74124335","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}

{"title":"Meet Our Regional Editor","authors":"M. Reddy","doi":"10.2174/221068120901181226143542","DOIUrl":"https://doi.org/10.2174/221068120901181226143542","url":null,"abstract":"","PeriodicalId":18979,"journal":{"name":"Nanoscience & Nanotechnology-Asia","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79869519","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}

{"title":"An Accurate Drain Current Model for Symmetric Dual Gate Tunnel FET Using Effective Tunneling Length","authors":"S. Sahoo, S. Dash, G. P. Mishra","doi":"10.2174/2210681207666170612081017","DOIUrl":"https://doi.org/10.2174/2210681207666170612081017","url":null,"abstract":"\u0000\u0000 Here we propose an accurate drain current model for a Symmetric Dual\u0000Gate Tunnel FET (SDG-TFET) using effective tunneling length and generation rate of carrier over\u0000tunneling junction area.\u0000\u0000\u0000\u0000\u0000 The surface potential of the model is obtained by solving 2-dimensional\u0000Poisson’s equation and further extends to determine the magnitude of initial tunneling length and\u0000final tunneling length. The different DC performance indicators like drain current (ID), threshold\u0000voltage (Vth), transconductance (gm) and Subthreshold Slope (SS) for the present model are extensively\u0000investigated and the results are compared with that of Single Gate Tunnel FET (SGTFET).\u0000\u0000\u0000 The practical importance of this model relies on its accuracy and improved electrostatic\u0000performance over SG-TFET. The analytical model results are validated using TCAD Sentaurus\u0000(Synopsys) device simulator.\u0000","PeriodicalId":18979,"journal":{"name":"Nanoscience & Nanotechnology-Asia","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91220472","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}

{"title":"Morphology and Electronic Properties of TiO2 Nanotubes Arrays Synthesized by Electrochemical Method","authors":"H. Fraoucene, D. Hatem, F. Vacandio, M. Pasquinelli","doi":"10.2174/2210681208666180411154247","DOIUrl":"https://doi.org/10.2174/2210681208666180411154247","url":null,"abstract":"\u0000\u0000 A nano-tubular structure of Titanium dioxide (TiO2) was obtained using an electrochemical\u0000process based on the anodization of titanium foil in an organic electrolyte prepared with ethylene glycol\u0000(HOCH2CH2OH) containing Ammonium fluorides (NH4F) and ultrapure water under different anodization\u0000voltage. The morphological characteristics showed the formation of TiO2 nanotubes with different geometrical\u0000parameters. The electronic properties of the TiO2 NTs films were measured by the Mott-Schottky (MS) plots,\u0000indicating a positive slope for all graphs implying the n-type semiconductor nature of the TiO2 nanotubes (TiO2\u0000NTs). The donor density (Nd) and the flat band potential (Efb) increases slightly with increase the anodization\u0000voltage.\u0000\u0000\u0000\u0000\u0000 Prior the anodization, the titanium (Ti) foils were cut into square shape (2.25 cm2) with a selected\u0000work area of 0.6 cm2. The samples were subjected to a final polishing using a rotating felt pad (01 &µm) impregnated\u0000with alumina until a metallic mirror surface was obtained. The Ti foils were degreased by sonication in\u0000acetone, methanol and 2-Propanol for 10 minutes respectively, rinsed with ultrapure water and dried in a stream\u0000of compressed air. To form a TiO2 NTs, electrochemical anodization process was carried out at room temperature\u0000in Ethylene Glycol (EG) solution containing 0.3 wt% Ammonium fluorides (NH4F) and 2wt % ultrapure\u0000water for three (03) hours at different anodization voltage (20, 40 and 60V). A two-electrode cell was used for\u0000all the anodization measurements, with a platinum plate as the counter electrode, separated from the working\u0000electrode (titanium foil) by 1.5 cm. Immediately after anodization, the samples were soaked in ultrapure water\u0000to remove residual electrolyte for 10 minutes and then dried in an oven at 50 °C for 10 minutes.\u0000\u0000\u0000\u0000\u0000 TiO2 NTs grown from anodization of Ti foil in fluoride EG solution for 3h by varying the anodization\u0000voltage. The micrographic analysis shows a strong influence of the anodizing voltage on the morphology and\u0000geometrical parameters of the TiO2 NTs. Non homogenous NTs morphology was observed at 20 V with the\u0000presence of corrugations along the walls of the tubes. A perfect and regular nanotublar structure with smooth’s\u0000walls tubes was obtained at an anodization voltage of 60V. Moreover, the increase of anodization voltage leads\u0000to an increase in both the diameter and the length of tubes. In fact, the inner diameter and the length of the tubes\u0000(Di and L) values increase with increasing potential, being around (39 nm and 2 &µm) respectively at 20 V and\u0000(106 nm and 16,1 &µm) at 60 V. The measured electronic properties of TiO2 NTs indicating the n type semiconducting\u0000nature. It is remarkable that the donor density Nd increases toward higher values by increasing the anodizing\u0000voltage until 40V. However, for an anodization at 60V, the Nd has a small decrease value (7, 03 * 1019\u0000cm-3) indicating a diminution of defects present in the material. Also, by increasing ","PeriodicalId":18979,"journal":{"name":"Nanoscience & Nanotechnology-Asia","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75121159","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}

{"title":"Electronic, Thermochemistry and Vibrational Properties for Single-walled Carbon Nanotubes","authors":"F. Ajeel, M. Mohammed, Alaa M. Khudhair","doi":"10.2174/221068120701170419145428","DOIUrl":"https://doi.org/10.2174/221068120701170419145428","url":null,"abstract":"","PeriodicalId":18979,"journal":{"name":"Nanoscience & Nanotechnology-Asia","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79703284","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}

{"title":"Biosynthesis and in vitro Antimicrobial Potential of Silver Nanoparticles Prepared using Dicoma tomentosa Plant Extract","authors":"Geeta Arya, Ashish Kumar Malav, N. Gupta, Ajeet Kumar, S. Nimesh","doi":"10.2174/2210681207666170613095203","DOIUrl":"https://doi.org/10.2174/2210681207666170613095203","url":null,"abstract":"","PeriodicalId":18979,"journal":{"name":"Nanoscience & Nanotechnology-Asia","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85642058","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}

{"title":"Re-evaluation of Lubricant Oil Specifications Using Surface Modified Alumina Nanoadditives","authors":"S. Sayed, Y. Attia, M. Mohamed, Elsayed A. M. Elsherbini","doi":"10.2174/2210681207666170619084117","DOIUrl":"https://doi.org/10.2174/2210681207666170619084117","url":null,"abstract":"Small size 3±0.5nm alumina (Al2O3) nanoparticles have been prepared using control precipitation method in aqueous solution. Aluminum nitrate and ammonium carbonate were added to heated distilled water. Aluminum hydroxide was formed and calcined at 550 oC to produce boehmite (ɤ-Al2O3) nanoparticles. The novelty of this work is the surface modification of the formed ɤ-Al2O3 nanoparticles, characterized by their low cost, ease production, high melting point, corrosion resistance, high strength, chemical stability, low thermal conductivity and good electrical insulation properties by using oleic acid as a coupling agent to avoid the disadvantage of using nanomaterials as additives to lubricant oils due to their agglomeration to enhance the lubricant oil specifications. With three concentrations of surface modified Al2O3 nanoparticles, an improvement for physical properties of lubricant oil was observed. Lubricant with 0.05 wt% of surface modified Al2O3 nanoparticles has not applicable change in viscosity and has notable improvement in flash point, pour point, thermal stability and antiwear ability by rates 4.3%, 150%, 33% and 9.4%, respectively. Surface modification process for alumina provides a suitable dispersion of nanoparticles inside lubricant oil. In conclusion, alumina nanoadditives enhance the lubricant base-oil specification that introduces a leap for lubricant industry. A R T I C L E H I S T O R Y Received: September 30, 2016 Revised: April 27, 2017 Accepted: April 29, 2017 DOI: 10.2174/2210681207666170619084117","PeriodicalId":18979,"journal":{"name":"Nanoscience & Nanotechnology-Asia","volume":"774 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82999730","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}

{"title":"Exciton Size and Natural Transition Orbital Investigation in Varied Graphene Forms: High Level Ab-intio Computations","authors":"S. Chopra","doi":"10.2174/2210681207666170407165919","DOIUrl":"https://doi.org/10.2174/2210681207666170407165919","url":null,"abstract":"","PeriodicalId":18979,"journal":{"name":"Nanoscience & Nanotechnology-Asia","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82101374","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}