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https://www.readbyqxmd.com/read/27922019/nanomechanical-motion-transduction-with-a-scalable-localized-gap-plasmon-architecture
#1
Brian J Roxworthy, Vladimir A Aksyuk
Plasmonic structures couple oscillating electromagnetic fields to conduction electrons in noble metals and thereby can confine optical-frequency excitations at nanometre scales. This confinement both facilitates miniaturization of nanophotonic devices and makes their response highly sensitive to mechanical motion. Mechanically coupled plasmonic devices thus hold great promise as building blocks for next-generation reconfigurable optics and metasurfaces. However, a flexible approach for accurately batch-fabricating high-performance plasmomechanical devices is currently lacking...
December 6, 2016: Nature Communications
https://www.readbyqxmd.com/read/27917513/torsional-and-bending-resistance-of-waveone-gold-reciproc-and-twisted-file-adaptive-instruments
#2
S E Elsaka, A M Elnaghy, A E Badr
AIM: To compare the torsional and bending resistance of WaveOne Gold (Dentsply Tulsa Dental Specialties, Tulsa, OK, USA), Reciproc (VDW, Munich, Germany) and Twisted File Adaptive (Axis/SybronEndo, Orange, CA, USA) instruments. METHODOLOGY: Torsional strength of WaveOne Gold primary size 25, .07 taper, Reciproc size 25, .08 taper and Twisted File Adaptive M-L1 size 25, .08 taper was measured by fastening the apical 3 mm of the instrument firmly and applying a constant rotation at 2 rpm to the instrument using a torsiometer...
December 5, 2016: International Endodontic Journal
https://www.readbyqxmd.com/read/27917161/the-interaction-between-plants-and-bacteria-in-the-remediation-of-petroleum-hydrocarbons-an-environmental-perspective
#3
REVIEW
Panagiotis Gkorezis, Matteo Daghio, Andrea Franzetti, Jonathan D Van Hamme, Wouter Sillen, Jaco Vangronsveld
Widespread pollution of terrestrial ecosystems with petroleum hydrocarbons (PHCs) has generated a need for remediation and, given that many PHCs are biodegradable, bio- and phyto-remediation are often viable approaches for active and passive remediation. This review focuses on phytoremediation with particular interest on the interactions between and use of plant-associated bacteria to restore PHC polluted sites. Plant-associated bacteria include endophytic, phyllospheric, and rhizospheric bacteria, and cooperation between these bacteria and their host plants allows for greater plant survivability and treatment outcomes in contaminated sites...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27911819/programmable-and-reversible-plasmon-mode-engineering
#4
Ankun Yang, Alexander J Hryn, Marc R Bourgeois, Won-Kyu Lee, Jingtian Hu, George C Schatz, Teri W Odom
Plasmonic nanostructures with enhanced localized optical fields as well as narrow linewidths have driven advances in numerous applications. However, the active engineering of ultranarrow resonances across the visible regime-and within a single system-has not yet been demonstrated. This paper describes how aluminum nanoparticle arrays embedded in an elastomeric slab may exhibit high-quality resonances with linewidths as narrow as 3 nm at wavelengths not accessible by conventional plasmonic materials. We exploited stretching to improve and tune simultaneously the optical response of as-fabricated nanoparticle arrays by shifting the diffraction mode relative to single-particle dipolar or quadrupolar resonances...
November 28, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27911774/optically-transparent-semiconducting-polymer-nanonetwork-for-flexible-and-transparent-electronics
#5
Kilho Yu, Byoungwook Park, Geunjin Kim, Chang-Hyun Kim, Sungjun Park, Jehan Kim, Suhyun Jung, Soyeong Jeong, Sooncheol Kwon, Hongkyu Kang, Junghwan Kim, Myung-Han Yoon, Kwanghee Lee
Simultaneously achieving high optical transparency and excellent charge mobility in semiconducting polymers has presented a challenge for the application of these materials in future "flexible" and "transparent" electronics (FTEs). Here, by blending only a small amount (∼15 wt %) of a diketopyrrolopyrrole-based semiconducting polymer (DPP2T) into an inert polystyrene (PS) matrix, we introduce a polymer blend system that demonstrates both high field-effect transistor (FET) mobility and excellent optical transparency that approaches 100%...
November 22, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27911365/low-energy-cathodoluminescence-for-oxy-nitride-phosphors
#6
Yujin Cho, Benjamin Dierre, Takashi Sekiguchi, Takayuki Suehiro, Kohsei Takahashi, Takashi Takeda, Rong-Jun Xie, Yoshinobu Yamamoto, Naoto Hirosaki
Nitride and oxynitride (Sialon) phosphors are good candidates for the ultraviolet and visible emission applications. High performance, good stability and flexibility of their emission properties can be achieved by controlling their composition and dopants. However, a lot of work is still required to improve their properties and to reduce the production cost. A possible approach is to correlate the luminescence properties of the Sialon particles with their local structural and chemical environment in order to optimize their growth parameters and find novel phosphors...
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
#7
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/27910478/measurement-of-turbulent-electron-temperature-fluctuations-on-the-asdex-upgrade-tokamak-using-correlated-electron-cyclotron-emission
#8
S J Freethy, G D Conway, I Classen, A J Creely, T Happel, A Köhn, B Vanovac, A E White
Turbulent temperature fluctuations are measured on the ASDEX Upgrade tokamak using pairs of closely spaced, narrow-band heterodyne radiometer channels and a standard correlation technique. The pre-detection spacing and bandwidth of the radiometer channel pairs is chosen such that they are physically separated less than a turbulent correlation length, but do not overlap. The radiometer has 4 fixed filter frequency channels and two tunable filter channels for added flexibility in the measurement position. Relative temperature fluctuation amplitudes are observed in a helium plasma to be δT/T = (0...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27908114/self-consistent-implementation-of-meta-gga-functionals-for-the-onetep-linear-scaling-electronic-structure-package
#9
James C Womack, Narbe Mardirossian, Martin Head-Gordon, Chris-Kriton Skylaris
Accurate and computationally efficient exchange-correlation functionals are critical to the successful application of linear-scaling density functional theory (DFT). Local and semi-local functionals of the density are naturally compatible with linear-scaling approaches, having a general form which assumes the locality of electronic interactions and which can be efficiently evaluated by numerical quadrature. Presently, the most sophisticated and flexible semi-local functionals are members of the meta-generalized-gradient approximation (meta-GGA) family, and depend upon the kinetic energy density, τ, in addition to the charge density and its gradient...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27906390/flexible-all-solid-state-supercapacitors-based-on-polyaniline-orderly-nanotubes-array
#10
Huihua Li, Juan Song, Linlin Wang, Xiaomiao Feng, Ruiqing Liu, Wenjin Zeng, Zhendong Huang, Yanwen Ma, Lianhui Wang
Flexible all-solid-state supercapacitors are crucial to meet the growing needs for portable electronic devices such as foldable phones and wearable electronics. As promising candidates for pseudocapacitor electrode materials, polyaniline (PANI) orderly nanotube arrays are prepared via a simple template electrodeposition method. The structures of the final product were characterized using various characterization techniques, including scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS)...
December 1, 2016: Nanoscale
https://www.readbyqxmd.com/read/27906071/are-digital-interventions-for-smoking-cessation-in-pregnancy-effective-a-systematic-review-protocol
#11
Sarah Ellen Griffiths, Katherine E Brown, Emily Anne Fulton, Ildiko Tombor, Felix Naughton
BACKGROUND: Behavioural support for smoking cessation in pregnancy can be effective; however, many pregnant women face barriers to seeking support to stop smoking. Some digital interventions have been found to be effective for smoking cessation in the general population and may be effective for supporting cessation in pregnancy due to their flexibility and the potential for personalisation. To date, there is limited evidence of the effectiveness of digital interventions for smoking cessation in pregnancy...
December 1, 2016: Systematic Reviews
https://www.readbyqxmd.com/read/27905582/regarding-the-torsional-flexibility-of-the-dihydrolipoic-acid-s-pharmacophore-1-3-propanedithiol
#12
Annalisa Vigorito, Camilla Calabrese, Ettore Paltanin, Sonia Melandri, Assimo Maris
The conformational space of antioxidant dihydrolipoic acid has been explored through the investigation of its pharmacophore, 1,3-propanedithiol. Five of the possible 25 non-equivalent isomers (namely: gGGg', gGGg, g'AGg, gAGg and g'AGg') were observed in the 59.6-74.4 GHz frequency region using free-jet absorption rotational spectroscopy. Furthermore, for three of them, the (34)S mono-substituted isotopologues were also detected in natural abundance. Theoretical simulations show that the balance of steric and electronic intramolecular interactions arises on a shallow conformational potential energy surface and suggest that in polar solvents the flexibility of the dithiol chain is greater than that in the isolated phase...
December 1, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27905322/synergistic-interactions-between-silver-decorated-graphene-and-carbon-nanotubes-yield-flexible-composites-to-attenuate-electromagnetic-radiation
#13
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
https://www.readbyqxmd.com/read/27902441/biosynthesis-of-selenate-reductase-in-salmonella-enterica-critical-roles-for-the-signal-peptide-and-dmsd
#14
Katherine Connelly, Calum Stevenson, Holger Kneuper, Frank Sargent
Salmonella enterica serovar Typhimurium is a Gram negative bacterium with a flexible respiratory capability. Under anaerobic conditions, S. enterica can utilise a range of terminal electron acceptors to sustain respiratory electron transport chains, including the potentially toxic compound selenate. The S. enterica selenate reductase is a membrane-bound enzyme encoded by the ynfEFGH-dmsD operon. The active enzyme is predicted to comprise at least three subunits where YnfE is a molybdenum-containing catalytic subunit...
October 20, 2016: Microbiology
https://www.readbyqxmd.com/read/27899666/structures-of-human-srp72-complexes-provide-insights-into-srp-rna-remodeling-and-ribosome-interaction
#15
Matthias M M Becker, Karine Lapouge, Bernd Segnitz, Klemens Wild, Irmgard Sinning
Co-translational protein targeting and membrane protein insertion is a fundamental process and depends on the signal recognition particle (SRP). In mammals, SRP is composed of the SRP RNA crucial for SRP assembly and function and six proteins. The two largest proteins SRP68 and SRP72 form a heterodimer and bind to a regulatory site of the SRP RNA. Despite their essential roles in the SRP pathway, structural information has been available only for the SRP68 RNA-binding domain (RBD). Here we present the crystal structures of the SRP68 protein-binding domain (PBD) in complex with SRP72-PBD and of the SRP72-RBD bound to the SRP S domain (SRP RNA, SRP19 and SRP68) detailing all interactions of SRP72 within SRP...
November 29, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27899660/cebs-a-comprehensive-annotated-database-of-toxicological-data
#16
Isabel A Lea, Hui Gong, Anand Paleja, Asif Rashid, Jennifer Fostel
The Chemical Effects in Biological Systems database (CEBS) is a comprehensive and unique toxicology resource that compiles individual and summary animal data from the National Toxicology Program (NTP) testing program and other depositors into a single electronic repository. CEBS has undergone significant updates in recent years and currently contains over 11 000 test articles (exposure agents) and over 8000 studies including all available NTP carcinogenicity, short-term toxicity and genetic toxicity studies...
November 28, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27898333/chemical-synthesis-and-supercapacitive-properties-of-lanthanum-telluride-thin-film
#17
S J Patil, A C Lokhande, D-W Lee, J H Kim, C D Lokhande
Lanthanum telluride (La2Te3) thin films are synthesized via a successive ionic layer adsorption and reaction (SILAR) method. The crystal structure, surface morphology and surface wettability properties are investigated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Field emission scanning electron microscopy (FE-SEM) and contact angle goniometer techniques, respectively. The La2Te3 material exhibits a specific surface area of 51m(2)g(-1) determined by Brunauer-Emmett-Teller (BET) method...
November 9, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27897287/phase-engineering-of-mos2-through-gan-aln-substrate-coupling-and-electron-doping
#18
Bin Ouyang, Pengfei Ou, Yongjie Wang, Zetian Mi, Jun Song
The polymorphism of two dimensional MoS2 promises new possibilities for nanoelectronics. The realization of those possibilities necessitates techniques to enable flexible and controllable phase engineering of MoS2. In the present study, based on first-principles calculations, a new and flexible route to engineer the phase stability of MoS2 by interfacing it with a GaN or AlN substrate is reported. Depending on the surface termination of the underlying substrate, MoS2 may exhibit either the 2H or 1T' (1T'') phase...
November 29, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27896345/high-performance-flexible-strain-sensor-based-on-self-locked-overlapping-graphene-sheets
#19
Dan-Yang Wang, Lu-Qi Tao, Ying Liu, Tian-Yu Zhang, Yu Pang, Qian Wang, Song Jiang, Yi Yang, Tian-Ling Ren
Strain sensors have been widely used in the fields of wearable devices, robot arms, medical sensing, bio-sensing, artificial skin and so on, but the existing strain sensors have some shortcomings such as a limited gauge factor (GF) or strain range. We fabricate a novel and flexible strain sensor with high performance based on self-locked overlapping graphene sheets (SOGS) which can be used for wearable devices. Polydimethylsiloxane (PDMS) is used to lock the overlapping graphene sheets, and then the graphene can be stretched and achieve an ultrahigh GF...
November 29, 2016: Nanoscale
https://www.readbyqxmd.com/read/27893439/one-step-spray-coated-tio2-electron-transport-layers-for-decent-perovskite-solar-cells-on-large-and-flexible-substrates
#20
Aibin Huang, Jingting Zhu, Yijie Zhou, Yu Yu, Yan Liu, Songwang Yang, Shidong Ji, Lei Lei, Ping Jin
Spray-coating as a facile and quantitative method was introduced to prepare thin and continuous TiO2 compact layers on different substrates for perovskite solar cells. The as-prepared film is highly transparent and smooth, which is of significance in perovskite solar cells to decrease incident light loss and facilitate the film cast and electric contact. The compact TiO2 layer shows excellent performance when coated with perovskite and assembled into a device. Since it provides unlimited substrate size, patterning function and the TiO2 used for spray-coating is well crystallized, this method has huge potential for mass production and great adaptability for a variety of applications...
November 28, 2016: Nanotechnology
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