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Synthesis of strontium substituted barium titanate nanoparticles by mechanical alloying and high power ultrasonication destruction

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AIP Conference Proceedings 2016年第1期1725卷

作者： Erlina Yustanti Mas Ayu Elita Hafizah Azwar Manaf 1Graduate Program of Material Science Faculty of Mathematics and Natural Sciences University of Indonesia Jl. Salemba Raya No. 04 Jakarta 10430 Indonesia 2Department of Metallurgy Faculty of Engineering University of Sultan AgengTirtayasa Jl. Jenderal Sudirman KM 03 Cilegon-Banten 65134 Indonesia

This paper reports the particle and crystallite size characterizations of mechanically alloyed Ba(1-x)SrxTiO3 (BST) with x = 0.3 and 0.7 prepared with the assistance of a high-power sonicator. Analytical grade BaCO3, TiO2 and SrCO3 precursors with a purity of greater than 99 wt.% were mixed and milled using a planetary ball mill to a powder weight ratio of 10:1. Powders obtained after 20 hours of milling time were then sintered at 1200°C for 4 hours to form crystalline *** powders were further treated ultrasonically under a fixed 6.7 gr/l particle concentration in demineralized water for 1, 3, 5, 7 hours and a fixed ultrasonic irradiation time of 1 hour to the dispersion of 6.7; 20; 33.3 gr/l concentrations. As to the results of crystallite size characterization, it is demonstrated that the mean crystallite size of BST with x = 0.3 and 0.7 undergo a slight change after the first 1 hour irradiation time and then remain almost unchanged. This was in contrary to the particle size in which the mean particle size of BST with x = 0.3 increased from 765 nm to 1405 nm after 7 hours irradiation time, while that of x = 0.7 increased from 505 nm to 1298 nm after 3 hours and then reduced back to the initial size after 7 hours ultra sonication time. The increase in particle size was due to large of cohesive forces among fine particles. It is also demonstrated that the concentration of particles in a dispersion with anionic surfactant do not effective to reduce the particle sizes ultrasonically. Nanoparticles with the mean size respectively 40 and 10 times larger than their respective crystallite size were successfully obtained respectively in x = 0.3 and x = 0.7.

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Solid tumor-targeting theranostic polymer nanoparticle in nuclear medicinal Fields

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Scientific World Journal 2014年第1期2014卷 424513-424513页

作者： Makino, Akira Kimura, Shunsaku Biomedical Imaging Research Center (BIRC) University of Fukui Fukui 910-1193 Japan Research and Education Program for Life Science University of Fukui Fukui 910-1193 Japan Department of Material Chemistry Graduate School of Engineering Kyoto University Kyoto 615-8510 Japan

Polymer nanoparticles can be prepared by self-assembling of amphiphilic polymers, and various types of molecular assemblies have been reported. In particular, in medicinal fields, utilization of these polymer nanoparticles as carriers for drug delivery system (DDS) has been actively tried, and some nanoparticulate drugs are currently under preclinical evaluations. A radionuclide is an unstable nucleus and decays with emission of radioactive rays, which can be utilized as a tracer in the diagnostic imaging systems of PET and SPECT and also in therapeutic purposes. Since polymer nanoparticles can encapsulate most of diagnostic and therapeutic agents with a proper design of amphiphilic polymers, they should be effective DDS carriers of radionuclides in the nuclear medicinal field. Indeed, nanoparticles have been recently attracting much attention as common platform carriers for diagnostic and therapeutic drugs and contribute to the development of nanotheranostics. In this paper, recent developments of solid tumor-targeting polymer nanoparticles in nuclear medicinal fields are reviewed. © 2014 Akira Makino and Shunsaku Kimura.

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Characterization of indigo-doped poly(3-hexylthiophene):-phenyl C61-butyric acid methyl ester bulk heterojunction solar cells

Characterization of indigo-doped poly(3-hexylthiophene):-phe...

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作者： Lu, Yang-Ming Wong, Jing-Syun Hsu, Lien-Chung Master Program of Electro-Optical Engineering Department of Electrical Engineering National University of Tainan Tainan Taiwan Graduate Institute of Material Science and Engineering National Cheng Kung University Tainan Taiwan

Poly(3-hexylthiophene)/[6,6]-phenyl C61-butyric acid methyl ester bulk hetero-junction photovoltaic cells doped with indigo dye as a p-type solar collector were studied. Doping indigo increases the absorption of the visible light spectrum, as determined using ultraviolet-visible spectrophotometry analysis. The photocurrent was measured in air under a solar simulator with AM 1.5G illumination (100 mW/cm2). The best photovoltaic efficiency obtained was 2.55% after doping indigo into the cell. © 2012 Elsevier B.V.

关键词： Organic solar cells

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Solution-processed zinc oxide nanoparticles as interlayer materials for inverted organic solar cells

Solution-processed zinc oxide nanoparticles as interlayer ma...

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作者： Ibrahem, Mohammed Aziz Wei, Hung-Yu Tsai, Meng-Hung Ho, Kuo-Chuan Shyue, Jing-Jong Chu, Chih Wie Department of Physics National Taiwan University Taipei 106 Taiwan Research Center of Applied Science Academia Sinica Taipei 115 Taiwan Nanoscience and Technology Program Taiwan International Graduate Program Academia Sinica Taipei 115 Taiwan Institute of Polymer Science and Engineering National Taiwan University Taipei 10617 Taiwan Department of Material Science and Engineering National Taiwan University Taipei 106 Taiwan Department of Photonics National Chiao Tung University Hsinchu 300 Taiwan

This paper describes inverted bulk heterojunction organic solar cells featuring solution-processed zinc oxide nanoparticles (ZnO NPs) as an electron extraction layer, prepared at relatively low annealing temperatures (≤150°C). A solution of ZnO NPs (average size: 25 nm) was prepared using a wet grinding method. When the ZnO interlayer was present in the solar cell, the vertical phase separation of the active layers prepared with and without solvent annealing exhibited similar gradient concentrations and, therefore, similar photocurrent generation, both of which were superior to those of conventional devices incorporating a poly(3,4-ethylenedioxythiophene): poly(styrene sulfonic acid) (PEDOT:PSS) hole extraction layer. We attribute this vertical phase separation to the similar surface energies of the fullerene derivative and the ZnO interlayer. Under simulated air mass (AM) 1.5 G illumination at 100 mW cm-2, the power conversion efficiency of the optimized device was approximately 4%. © 2012 Elsevier B.V.

关键词： Zinc oxide

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Selective enrichment and sensitive detection of candidate disease biomarker using a novel surfactant-coated magnetic nanoparticles

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IOP Conference Series: materials Science and engineering 2014年第1期64卷

作者： R Y Capangpangan M A C dela Rosa C H Chang W C Wang J Peng S J Shih M H Chiang D L Tzou C C Lin Y J Chen Department of Chemistry National Tsing Hua University Hsinchu Taiwan Molecular Science and Technology Taiwan International Graduate Program Taiwan contributed equally to this work Department of Chemistry National Taiwan University Taipei Taiwan Nanoscience and Technology Program Taiwan International Graduate Program Taiwan En Hou Polymer Chemical Ind. Co. Ltd. Taiwan Department of Material Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan Institute of Chemistry Academia Sinica Taipei Taiwan To whom any correspondence should be addressed

In this study, novel surfactant-coated magnetic nanoparticles were synthesized and evaluated for enrichment performance towards the sensitive detection of disease biomarkers. Surfactants with phosphate ester groups (RD35A and RD66) were used as a coating to reduce aggregation and to enhance the nanoparticle dispersion. Importantly, sensitive enrichment of the target proteins using the antibody-functionalized magnetic nanoparticles (Ab@MNP) was obtained, with a five-fold increase in recovery compared to uncoated magnetic nanoparticles. Similarly, phosphopeptide enrichment using the NTA@MNP in standard samples showed that the nanoparticles could selectively enrich phosphorylated peptides.

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Inside Cover: Out-of-Cell Oxygen Diffusivity Evaluation in Lithium–Air Batteries (ChemElectroChem 12/2014)

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ChemElectroChem 2014年第12期1卷 2032-2032页

作者： Prof. Weidong He Xiaoning Wang Luhan Ye Yu Pan Yuanqiang Song Aifang Liu Wei Wang Hongping Zhang Hongxue Qi Ming Zhou Zhiguo Wang Kelvin H. L. Zhang James H. Dickerson School of Energy Science and Engineering University of Electronic Science and Technology (UESTC) Chengdu Sichuan 611731 (P. R. China) Interdisciplinary Program in Materials Science Vanderbilt University Nashville Tennessee 37234-0106 (USA) Vanderbilt Institute of Nanoscale Science and Engineering Vanderbilt University Nashville Tennessee 37234-0106 (USA) Shenzhen Key Laboratory for Advanced Materials Department Material Science and Engineering Shenzhen Graduate School Harbin Institute of Technology University Town Shenzhen 518055 (P. R. China) School of Materials Science and Engineering Southwest University of Science and Technology Mianyang Sichuan 621010 (P. R. China) Department of Chemistry The University of Hong Kong Pokfulam Road (Hong Kong) Department of Applied Physics University of Electronic Science and Technology of China Chengdu 610054 (P. R China) Department of Chemistry Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA (UK) Department of Physics Brown University Providence RI 02912 (USA)

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material Recovery and Characterization of PCB from Electronic Waste

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Procedia - Social and Behavioral Sciences 2012年 57卷 331-338页

作者： Jessica Hanafi Eric Jobiliong Agustina Christiani Dhamma C. Soenarta Juwan Kurniawan Januar Irawan Graduate Program in Industrial Engineering Department of Industrial Engineering Faculty of Industrial Technology Universitas Pelita Harapan Karawaci Banten 15811 Indonesia Pusat Penelitian Metalurgi (Material Science Research Centre) Indonesian Institute of Science (LIPI) Kawasan Puspitek Serpong Tangerang 15310 Indonesia

Printed Circuit Boards are commonly exist in computers, laptops and mobile phones. Since it contains of a variety of metals and semiconductors, it is difficult to recover the materials in PCB. This paper aims to characterize the composition of these materials and a method to properly recycle and recover the materials in them. This paper utilized simple mechanical and chemical procedures to recover PCBs. Collected PCBs were disassembled, pulverized and separated by using density and magnetic separation method. By using the chemical recycling method, 98.82% purity of CuSO4 hydrate and Al2(SO4)3 hydrate were recovered from the PCBs. It is found that the milling methods, size of the sample and the density of the separating solution determine the effectiveness of the materials recovered.

关键词： material recovery electronic waste printed circuit board

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Nanomodified material to orthesis manufacturing

Nanomodified material to orthesis manufacturing

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15th European Conference on Composite materials: Composites at Venice, ECCM 2012

作者： Carvalho, M.G. Van Petten, A.M.N. Ávila, A.F. Duarte, A. Department of Occupational Therapy Universidade Federal de Minas Gerais 6627 Antônio Carlos Avenue Belo Horizonte /MG Brazil Department of Mechanical Engineering Universidade Federal de Minas Gerais 6627 Antônio Carlos Avenue Belo Horizonte /MG Brazil Graduate Program on Metallurgical Material and Mining Engineering Universidade Federal de Minas Gerais 6627 Antônio Carlos Avenue Belo Horizonte /MG Brazil

ISBN: (纸本)9788888785332

This work focuses on the development and mechanical characterization of a hybrid nanocomposite material to orthesis fabrication. The analyzed hybrid composite was a carbon/nanomodified epoxy system. The reinforcement was a plain fiber wave and the epoxy system was DGEBA. The glass fiber volume fraction was around 60%. The graphene sheets were obtained from expandable graphite. The nanoparticles concentrations were 1 wt%, 2 wt% and 3 wt%, respectively. Nanocomposites were made using a high shear mixer and ultrasound. Mechanical characterization was performed considering the ASTM D 790 three point bending test. Results show that all graphene based hybrid composites have much better mechanical properties than Ezeform®, the conventional material used in orthotic fabrication.

关键词： Graphene

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Utilization of Recycled Rayon Waste-Kapok Mixture (RRWK) as a sorbent for oil removal

Utilization of Recycled Rayon Waste-Kapok Mixture (RRWK) as ...

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International Conference on Systems and Electronic engineering(ICSEE’2012);International Conference on Civil and Architectural applications (ICCAA’2012);International Conference on Advances in Electrical and Mechanical engineering(ICAEME’2012);International Conference on Business,Finance and Geography(ICBFG’2012);International Conference on Ecology,Agriculture and Chemical engineering(ICEACS’2012);International Conference on Biotechnology,Biological and Biosystems engineering(ICBBBE’2012)

作者： Chaowalit Senanurakwarkul Panadda Kongsricharoen Darathip Pejprom Sutha Khaodhiar Supawan Tantayanon Technopreneurship and Innovation Management program Graduate School Chulalongkorn University Department of Environmental Engineering Chulalongkorn University Department of Chemistry Faculty of Science Chulalongkorn University Center of Petroleum and Advanced Material Chulalongkorn University Technopreneurship and Innovation Management Graduate School Chulalongkorn University

The aim of this study was to investigate the utilization of a recycled rayon waste-kapok mixture as an oil sorbent for the removal of diesel and motor oil. The oil-sorption capacity of the materials under static conditions was evaluated. The results show the high sorption capacity of the recycled rayon waste-kapok mixture for both diesel and motor oil after 15 minutes (14.30 g of oil/g of sorbent for diesel oil and 24.17 g of oil/g of sorbent for motor oil) and after 24 hours (15.30 g of oil/g of sorbent for diesel oil and 25.05 g of oil/g of sorbent for motor oil). It can be concluded that RRWK, which can be produced by utilizing industrial waste, is an effective low cost, environmentally friendly oil sorbent with comparable performance to commercial products.

关键词： Recycled rayon waste-kapok mixture, oil sorbent

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Accelerated oxidation of silicon due to x-ray irradiation

Accelerated oxidation of silicon due to x-ray irradiation

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12th European Conference on Radiation and Its Effects on Component and Systems, RADECS 2011

作者： Bhandaru, Shweta Zhang, En Xia Fleetwood, Daniel M. Reed, Robert A. Weller, Robert A. Weiss, Sharon M. Interdisciplinary Graduate Program in Material Science Vanderbilt University Nashville TN 37235 United States Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN 37235 United States

Enhanced rates of oxide growth have been observed on silicon when exposed to high-energy x-ray irradiation. This observed effect could potentially be utilized for remote total ionizing dose-sensing applications. ©... 详细信息

ISBN: (纸本)9781457705878

关键词： Silicon

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