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https://www.readbyqxmd.com/read/27911418/synthesis-and-characterization-of-fe-doped-aluminosilicate-nanotubes-with-enhanced-electron-conductive-properties
#1
Ehsan Shafia, Serena Esposito, Elnaz Bahadori, Marco Armandi, Maela Manzoli, Barbara Bonelli
The goal of the protocol is to synthesize Fe-doped aluminosilicate nanotubes of the imogolite type with the formula (OH)3Al2-xFexO3SiOH. Doping with Fe aims at lowering the band gap of imogolite, an insulator with the chemical formula (OH)3Al2O3SiOH, and at modifying its adsorption properties towards azo-dyes, an important class of organic pollutants of both wastewater and groundwater. Fe-doped nanotubes are obtained in two ways: by direct synthesis, where FeCl3 is added to an aqueous mixture of the Si and Al precursors, and by post-synthesis loading, where preformed nanotubes are put in contact with a FeCl3•6H2O aqueous solution...
November 15, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27910889/direct-imaging-of-defect-formation-in-strained-organic-flexible-electronics-by-scanning-kelvin-probe-microscopy
#2
Tobias Cramer, Lorenzo Travaglini, Stefano Lai, Luca Patruno, Stefano de Miranda, Annalisa Bonfiglio, Piero Cosseddu, Beatrice Fraboni
The development of new materials and devices for flexible electronics depends crucially on the understanding of how strain affects electronic material properties at the nano-scale. Scanning Kelvin-Probe Microscopy (SKPM) is a unique technique for nanoelectronic investigations as it combines non-invasive measurement of surface topography and surface electrical potential. Here we show that SKPM in non-contact mode is feasible on deformed flexible samples and allows to identify strain induced electronic defects...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910603/investigation-on-quench-initiation-and-propagation-characteristics-of-gdbco-coil-co-wound-with-a-stainless-steel-tape-as-turn-to-turn-metallic-insulation
#3
Y G Kim, J B Song, Y H Choi, D G Yang, S G Kim, H G Lee
This paper investigates the quench initiation and propagation characteristics of a metallic insulation (MI) coil by conducting thermal quench tests for a GdBCO single-pancake coil co-wound with a stainless steel tape as the turn-to-turn MI. The test results confirmed that the MI coil exhibited superior thermal and electrical stabilities compared to the conventional coils co-wound with organic insulation material because the operating current could flow along the radial direction due to the existence of a turn-to-turn contact when a local hot spot was generated...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910393/a-single-shot-spatial-chirp-method-for-measuring-initial-ac-conductivity-evolution-of-femtosecond-laser-pulse-excited-warm-dense-matter
#4
Z Chen, P Hering, S B Brown, C Curry, Y Y Tsui, S H Glenzer
To study the rapid evolution of AC conductivity from ultrafast laser excited warm dense matter (WDM), a spatial chirp single-shot method is developed utilizing a crossing angle pump-probe configuration. The pump beam is shaped individually in two spatial dimensions so that it can provide both sufficient laser intensity to excite the material to warm dense matter state and a uniform time window of up to 1 ps with sub-100 fs FWHM temporal resolution. Temporal evolution of AC conductivity in laser excited warm dense gold was also measured...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910220/inverse-vulcanization-of-sulfur-with-natural-dienes-as-sustainable-materials-for-lithium-sulfur-batteries
#5
David Mecerreyes, Iñaki Gomez, Alberto Blazquez, Olatz Leonet
Lithium sufur batteries are among the most promising next generation battery systems due to the high capacity properties of sulfur as cathodic material. Beyond its interesting intrinsic properties, sulfur possesses a very low conductivity and complex electrochemistry which involves the high solubility of the lithium sulfides in the electrolyte. These two characteristics trigger a series of limitations on its performance as active cathode material which leads to batteries with low cyclability. Recently, inverse vulcanizated sulfur has shown to retain capacity far better than elemental sulfur leading to batteries with excellent cyclability...
December 2, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27910203/designing-easy-dna-extraction-teaching-creativity-through-laboratory-practice
#6
Endang Susantini, Lisa Lisdiana Isnawati, Aushia Tanzih Al Haq, Guntur Trimulyono
Subject material concerning Deoxyribose Nucleic Acid (DNA) structure in the format of creativity-driven laboratory practice offers meaningful learning experience to the students. Therefore, a laboratory practice in which utilizes simple procedures and easy-safe-affordable household materials should be promoted to students to develop their creativity. This study aimed to examine whether designing and conducting DNA extraction with household materials could foster students' creative thinking. We also described how this laboratory practice affected students' knowledge and views...
December 2, 2016: Biochemistry and Molecular Biology Education
https://www.readbyqxmd.com/read/27910196/atomically-dispersed-iron-nitrogen-species-as-electrocatalysts-for-bifunctional-oxygen-evolution-and-reduction-reactions
#7
Pengzuo Chen, Tianpei Zhou, Lili Xing, Kun Xu, Yun Tong, Hui Xie, Lidong Zhang, Wensheng Yan, Wangsheng Chu, Changzheng Wu, Yi Xie
Rational design of non-noble materials as highly efficient, economical, and durable bifunctional catalysts for oxygen evolution and reduction reactions (OER/ORR) is currently a critical obstacle for rechargeable metal-air batteries. A new route involving S was developed to achieve atomic dispersion of Fe-Nx species on N and S co-decorated hierarchical carbon layers, resulting in single-atom bifunctional OER/ORR catalysts for the first time. The abundant atomically dispersed Fe-Nx species are highly catalytically active, the hierarchical structure offers more opportunities for active sites, and the electrical conductivity is greatly improved...
December 2, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27909532/ajmaline-challenge-to-unmask-infrahisian-disease-in-patients-with-recurrent-and-unexplained-syncope-preserved-ejection-fraction-with-or-without-conduction-abnormalities-on-surface-ecg
#8
Francesco Pentimalli, Luca Bacino, Matteo Ghione, Giambattista Siri, Massimo Gazzarata, Paolo Bellotti
Background: Pharmacological challenge with class I antiarrhythmic drug is a recommended diagnostic test in patients with unexplained syncope only in the presence of bundle branch block, when non-invasive tests have failed to make the diagnosis. Its role in patients with minor or no conduction disturbances on 12-leads ECG has not been evaluated yet. It is also not clear which are the values of His-Ventricular interval to be considered diagnostic. We sought to evaluate the role of ajmaline challenge in unmasking the presence of an infrahisian disease in patients with recurrent and unexplained syncope, regardless of the existence of conduction disturbances on surface ECG...
August 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27909390/child-welfare-involved-parents-and-pathways-triple-p-perceptions-of-program-acceptability-and-appropriateness
#9
Ericka M Lewis, Megan Feely, Kristen D Seay, Nicole Fedoravicis, Patricia L Kohl
Nearly half of children in the child welfare system have clinically significant behavior problems and are at risk of developing disruptive behavioral disorders. Yet, behavioral parent training interventions, which are the most effective way to treat these problems, are rarely provided to child welfare involved families. As a result, little is known about the acceptability and appropriateness of these parent training interventions with these families. This qualitative study explored implementation outcomes of an evidenced-based parenting intervention, Pathways Triple P, with families in the child welfare system...
December 2016: Journal of Child and Family Studies
https://www.readbyqxmd.com/read/27909208/evaluation-of-a-national-telemedicine-initiative-in-the-veterans-health-administration-factors-associated-with-successful-implementation
#10
Lauren Stevenson, Sherry Ball, Leah M Haverhals, David C Aron, Julie Lowery
BACKGROUND: The Consolidated Framework for Implementation Research was used to evaluate implementation facilitators and barriers of Specialty Care Access Network-Extension for Community Healthcare Outcomes (SCAN-ECHO) within the Veterans Health Administration. SCAN-ECHO is a video teleconferencing-based programme where specialist teams train and mentor remotely-located primary care providers in providing routine speciality care for common chronic illnesses. The goal of SCAN-ECHO was to improve access to speciality care for Veterans...
November 30, 2016: Journal of Telemedicine and Telecare
https://www.readbyqxmd.com/read/27908461/the-vato-project-an-original-methodology-to-study-the-transfer-of-tritium-as-ht-and-hto-in-grassland-ecosystem
#11
D Maro, F Vermorel, M Rozet, C Aulagnier, D Hébert, S Le Dizès, C Voiseux, L Solier, C Cossonnet, C Godinot, B Fiévet, P Laguionie, O Connan, O Cazimajou, M Morillon, M Lamotte
Tritium ((3)H) is mainly released into the environment by nuclear power plants, military nuclear facilities and nuclear reprocessing plants. The construction of new nuclear facilities in the world as well as the evolution of nuclear fuel management might lead to an increase of (3)H discharges from the nuclear industry. The VATO project was set up by IRSN (Institut de Radioprotection et de Sûreté Nucléaire) and EDF (Electricité de France) to reduce the uncertainties in the knowledge about transfers of (3)H from an atmospheric source (currently releasing HT and HTO) to a grassland ecosystem...
November 29, 2016: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/27908256/a-review-on-nano-antimicrobials-metal-nanoparticles-methods-and-mechanisms
#12
Edris Hoseinzadeh, Pouran Makhdoumi, Parisa Taha, John Stelling, Hooshyar Hossini, Mohammad Amjad Kamal, Ghulam Md Ashraf
Nanotechnology is a scientific and engineering technology conducted at the Nano-scale, such as in the fields of compound fabric manufacturing, food processing, agricultural processing, and engineering, as well as in medical and medicinal application. In recent decade, nanomaterial applications for antimicrobial works have been interested by many researchers. Available reports show that some of the metal oxide Nanoparticles including; Al2O3, TiO2, ZnO, CuO, Co3O4, In2O3, MgO, SiO2, ZrO2, Cr2O3, Ni2O3, Mn2O3, CoO, and Nickel oxide have toxicity toward several microorganisms and they could successfully kill numerous bacteria...
December 1, 2016: Current Drug Metabolism
https://www.readbyqxmd.com/read/27908099/molecular-dynamics-study-of-nano-porous-materials-enhancement-of-mobility-of-li-ions-in-lithium-disilicate
#13
Junko Habasaki
In several nano-porous materials and their composites, enhancement of ionic conductivity has been reported and several mechanisms having different origins have been proposed so far. In the present work, ionic motion of Li ions in porous lithium disilicates is examined by molecular dynamics simulation in the constant volume conditions and the enhancement of the dynamics is predicted. Structures and dynamics of ions in a nano-porous system were characterized and visualized to clarify the mechanism of the enhancement...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27906408/spatially-uniform-resistance-switching-of-low-current-high-endurance-titanium-niobium-oxide-memristors
#14
Suhas Kumar, Noraica Davila, Ziwen Wang, Xiaopeng Huang, John Paul Strachan, David Vine, A L David Kilcoyne, Yoshio Nishi, R Stanley Williams
We analyzed micrometer-scale titanium-niobium-oxide prototype memristors, which exhibited low write-power (<3 μW) and energy (<200 fJ per bit per μm(2)), low read-power (∼nW), and high endurance (>millions of cycles). To understand their physico-chemical operating mechanisms, we performed in operando synchrotron X-ray transmission nanoscale spectromicroscopy using an ultra-sensitive time-multiplexed technique. We observed only spatially uniform material changes during cell operation, in sharp contrast to the frequently detected formation of a localized conduction channel in transition-metal-oxide memristors...
December 1, 2016: Nanoscale
https://www.readbyqxmd.com/read/27906401/efficient-organic-photovoltaic-cells-on-a-single-layer-graphene-transparent-conductive-electrode-using-moox-as-an-interfacial-layer
#15
J H Du, H Jin, Z K Zhang, D D Zhang, S Jia, L P Ma, W C Ren, H M Cheng, P L Burn
The large surface roughness, low work function and high cost of transparent electrodes using multilayer graphene films can limit their application in organic photovoltaic (OPV) cells. Here, we develop single layer graphene (SLG) films as transparent anodes for OPV cells that contain light-absorbing layers comprised of the evaporable molecular organic semiconductor materials, zinc phthalocyanine (ZnPc)/fullerene (C60), as well as a molybdenum oxide (MoOx) interfacial layer. In addition to an increase in the optical transmittance, the SLG anodes had a significant decrease in surface roughness compared to two and four layer graphene (TLG and FLG) anodes fabricated by multiple transfer and stacking of SLGs...
December 1, 2016: Nanoscale
https://www.readbyqxmd.com/read/27906313/experimental-study-on-the-transition-of-plasmonic-resonance-modes-in-double-ring-dimers-by-conductive-junctions-in-the-terahertz-regime
#16
Huifang Zhang, Chun Li, Caihong Zhang, Xueqian Zhang, Jianqiang Gu, Biaobing Jin, Jiaguang Han, Weili Zhang
Plasmonic dimers that made from two subwavelength particles have drawn much attention in the recent years, which are quite promising in local field enhancement, sensing, high frequency conductance probing and electron tunneling. In this work, we experimentally investigate the mode transition effect of different plasmonic resonances in double-ring dimers when introducing conductive junction at the dimer gap in the terahertz regime. Without the junction, the dimers support a single dipolar bonding dimer plasmonic (BDP) mode...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27906117/carotid-artery-stenting-versus-no-stenting-assisting-thrombectomy-for-acute-ischaemic-stroke-protocol-for-a-systematic-review-of-randomised-clinical-trials-with-meta-analyses-and-trial-sequential-analyses
#17
Henrik Steglich-Arnholm, Markus Holtmannspötter, Christian Gluud, Derk Wolfgang Krieger
BACKGROUND: In patients with intracranial large vessel arterial occlusion, ipsilateral extracranial carotid artery occlusions or near-occlusions pose a significant hurdle in endovascular management of acute ischaemic stroke. Stenting of the carotid lesion may be beneficial in this situation to provide a stable access for introducing catheters through the carotid lesion into the intracranial vasculature and the target occlusion. Furthermore, carotid stenting may ensure ample blood flow for wash-out of clot material and reperfusion of the ischaemic penumbral tissue...
December 1, 2016: Systematic Reviews
https://www.readbyqxmd.com/read/27905876/age-and-sex-specific-associations-of-anthropometric-measures-of-adiposity-with-blood-pressure-and-hypertension-in-india-a-cross-sectional-study
#18
Kevin Y Taing, Michael E Farkouh, Rahim Moineddin, Jack V Tu, Prabhat Jha
BACKGROUND: A determinant of blood pressure is adiposity; however, there are uncertainties surrounding whether general or central adiposity is the more important determinant of blood pressure. Further, inconsistent results exist for the relationships of anthropometric measures with blood pressure and hypertension, and whether these relationships differ substantially by age and sex is unclear. We aimed to elucidate the associations of anthropometric measures of general and central adiposity with blood pressure and hypertension, and determine the effect of age and sex on these relationships...
December 1, 2016: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/27905553/characteristics-of-ions-emission-from-ultrashort-laser-produced-plasma
#19
Ahmed M Elsied, Nicholas C Termini, Prasoon K Diwakar, Ahmed Hassanein
The dynamic characteristics of the ions emitted from ultrashort laser interaction with materials were studied. A series of successive experiments were conducted for six different elements (C, Al, Cu, Mo, Gd, and W) using 40 fs, 800 nm Ti: Sapphire laser. Time-of-flight (TOF) ion profile was analyzed and charge emission dependencies were investigated. The effects of incident laser interaction with each element were studied over a wide range of laser fluences (0.8 J/cm(2) to 24 J/cm(2)) corresponding to laser intensities (2...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27905322/synergistic-interactions-between-silver-decorated-graphene-and-carbon-nanotubes-yield-flexible-composites-to-attenuate-electromagnetic-radiation
#20
Shital Patangrao Pawar, Sachin Kumar, Shubham Jain, Mounika Gandi, Kaushik Chatterjee, Suryasarathi Bose
The need of today's highly integrated electronic devices, especially working in the GHz frequencies, is to protect them from unwanted interference from neighbouring devices. Hence, lightweight, flexible, easy to process microwave absorbers were designed here by dispersing conductive multiwall carbon nanotubes (MWNTs) and silver nanoparticles decorated onto two-dimensional graphene sheets (rGO@Ag) in poly(ε-caprolactone) (PCL). In this study, we have shown how dielectric losses can be tuned in the nanocomposites by rGO@Ag nano-hybrid; an essential criterion for energy dissipation within a material resulting in effective shielding of the incoming electromagnetic (EM) radiation...
December 1, 2016: Nanotechnology
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