keyword
MENU ▼
Read by QxMD icon Read
search

stand thinning

keyword
https://www.readbyqxmd.com/read/27897210/fabrication-of-ws2-gan-p-n-junction-by-wafer-scale-ws2-thin-film-transfer
#1
Yang Yu, Patrick W K Fong, Shifeng Wang, Charles Surya
High quality wafer-scale free-standing WS2 grown by van der Waals rheotaxy (vdWR) using Ni as a texture promoting layer is reported. The microstructure of vdWR grown WS2 was significantly modified from mixture of crystallites with their c-axes both parallel to (type I) and perpendicular to (type II) the substrate to large type II crystallites. Wafer-scale transfer of vdWR grown WS2 onto different substrates by an etching-free technique was demonstrated for the first time that utilized the hydrophobic property of WS2 and hydrophilic property of sapphire...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27897189/a-design-principle-of-polymers-processable-into-2d-homeotropic-order
#2
Zhen Chen, Yi-Tsu Chan, Daigo Miyajima, Takashi Kajitani, Atsuko Kosaka, Takanori Fukushima, Jose M Lobez, Takuzo Aida
How to orient polymers homeotropically in thin films has been a long-standing issue in polymer science because polymers intrinsically prefer to lie down. Here we provide a design principle for polymers that are processable into a 2D homeotropic order. The key to this achievement was a recognition that cylindrical polymers can be designed to possess oppositely directed local dipoles in their cross-section, which possibly force polymers to tightly connect bilaterally, affording a 2D rectangular assembly. With a physical assistance of the surface grooves on Teflon sheets that sandwich polymer samples, homeotropic ordering is likely nucleated and gradually propagates upon hot-pressing towards the interior of the film...
November 29, 2016: Nature Communications
https://www.readbyqxmd.com/read/27881529/co-occurrence-and-clustering-of-health-conditions-at-age-11-cross-sectional-findings-from-the-millennium-cohort-study
#3
Kathryn R Hesketh, James Fagg, Graciela Muniz-Terrera, Helen Bedford, Catherine Law, Steven Hope
OBJECTIVES: To identify patterns of co-occurrence and clustering of 6 common adverse health conditions in 11-year-old children and explore differences by sociodemographic factors. DESIGN: Nationally representative prospective cohort study. SETTING: Children born in the UK between 2000 and 2002. PARTICIPANTS: 11 399 11-year-old singleton children for whom data on all 6 health conditions and sociodemographic information were available (complete cases)...
November 22, 2016: BMJ Open
https://www.readbyqxmd.com/read/27874113/an-atomically-thin-layer-of-ru-mos2-heterostructure-structural-electronic-and-magnetic-properties
#4
Chenghuan Jiang, Rongqing Zhou, Zhaohui Peng, Jinfu Zhu, Qian Chen
The fabrication of a transition metal (TM) atomically thin layer with robust ferromagnetic ordering (FM) for the continuous miniaturization of spintronic and quantum computing devices is desired. Through first-principles calculations, we establish that Ru atoms can be epitaxially aligned on MoS2 monolayers, thus forming an atomically thin layer of 2D Ru/MoS2 heterostructure with high structural stability. The Ru layer possesses a robust FM (more than 300 K) and an out-of-plane easy axis with the magnetic anisotropy energy (MAE) of ∼3...
November 30, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27862737/chemically-delaminated-free-standing-ultrathin-covalent-organic-nanosheets
#5
M Abdul Khayum, Sharath Kandambeth, Shouvik Mitra, Sanoop B Nair, Anuja Das, Samadhan S Nagane, Rabibrata Mukherjee, Rahul Banerjee
Covalent organic nanosheets (CONs) are a new class of porous thin two-dimensional (2D) nanostructures that can be easily designed and functionalized and could be useful for separation applications. Poor dispersion, layer restacking, and difficult postsynthetic modifications are the major hurdles that need to be overcome to fabricate scalable CON thin films. Herein, we present a unique approach for the chemical exfoliation of an anthracene-based covalent organic framework (COF) to N-hexylmaleimide-functionalized CONs, to yield centimeter-sized free-standing thin films through layer-by-layer CON assembly at the air-water interface...
November 10, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27830831/patterned-microstructure-fabrication-polyelectrolyte-complexes-vs-polyelectrolyte-multilayers
#6
Meiyu Gai, Johannes Frueh, Valeriya L Kudryavtseva, Rui Mao, Maxim V Kiryukhin, Gleb B Sukhorukov
Polyelectrolyte complexes (PEC) are formed by mixing the solutions of oppositely charged polyelectrolytes, which were hitherto deemed "impossible" to process, since they are infusible and brittle when dry. Here, we describe the process of fabricating free-standing micro-patterned PEC films containing array of hollow or filled microchambers by one-step casting with small applied pressure and a PDMS mould. These structures are compared with polyelectrolyte multilayers (PEM) thin films having array of hollow microchambers produced from a layer-by-layer self-assembly of the same polyelectrolytes on the same PDMS moulds...
November 10, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27827459/self-supported-crack-free-conducting-polymer-films-with-stabilized-wrinkling-patterns-and-their-applications
#7
Jixun Xie, Xue Han, Haipeng Ji, Juanjuan Wang, Jingxin Zhao, Conghua Lu
Self-supported conducting polymer films with controlled microarchitectures are highly attractive from fundamental and applied points of view. Here a versatile strategy is demonstrated to fabricate thin free-standing crack-free polyaniline (PANI)-based films with stable wrinkling patterns. It is based on oxidization polymerization of pyrrole inside a pre-wrinkled PANI film, in which the wrinkled PANI film is used both as a template and oxidizing agent for the first time. The subsequently grown polypyrrole (PPy) and the formation of interpenetrated PANI/PPy networks play a decisive role in enhancing the film integrity and the stability of wrinkles...
November 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27811709/cliona-acephala-porifera-demospongiae-clionaida-a-new-encrusting-excavating-reef-sponge-from-the-colombian-caribbean-belonging-to-the-cliona-viridis-species-complex
#8
Sven Zea, Mateo López-Victoria
Several groups of sponges are able to excavate galleries and tunnels in calcareous substrata such as limestone rock, shells, calcareous algae and coral skeletons. Within the genus Cliona, some species share the common traits of being brown to olive-green in color, and harboring photosynthetic, unicellular dinoflagellates (zooxanthellae). These Cliona spp. have been grouped as the Cliona viridis species complex. Several species of this complex completely encrust the excavated substratum with a thin veneer of tissue and, when colonizing dead exposed parts of live coral colonies, they are able to undermine or overgrow and thus kill live coral tissue as they advance predominantly laterally...
October 26, 2016: Zootaxa
https://www.readbyqxmd.com/read/27802765/a-free-standing-thin-foil-bolometer-for-measuring-soft-x-ray-fluence
#9
Qingyuan Hu, Jiamin Ning, Fan Ye, Shijian Meng, Rongkun Xu, Jianlun Yang, Yanyun Chu, Yi Qin, Yuecheng Fu, Faxin Chen, Zeping Xu
A free-standing thin foil bolometer for measuring soft x-ray fluence in z-pinch experiments is developed. For the first time, we present the determination of its sensitivity by different methods. The results showed great consistency for the different methods, which confirms the validity of the sensitivity and provides confidence for its application in z-pinch experiments. It should be highlighted that the sensitivity of a free-standing foil bolometer could be calibrated directly using Joule heating without any corrections that will be necessary for a foil bolometer with substrate because of heat loss...
October 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27802056/core-shell-germanium-germanium-tin-nanowires-exhibiting-room-temperature-direct-and-indirect-gap-photoluminescence
#10
Andrew C Meng, Colleen Shang Fenrich, Michael R Braun, James P McVittie, Ann F Marshall, James S Harris, Paul C McIntyre
Germanium-tin alloy nanowires hold promise as silicon-compatible optoelectronic elements with the potential for achieving a direct band gap transition required for efficient light emission. In contrast to Ge1-xSnx epitaxial thin films, free-standing nanowires deposited on misfitting germanium or silicon substrates can avoid compressive elastic strains that inhibit formation of a direct gap. We demonstrate strong room temperature photoluminescence, consistent with band edge emission from both the Ge core nanowires, elastically strained in tension, and the almost unstrained Ge1-xSnx shells grown around them...
November 1, 2016: Nano Letters
https://www.readbyqxmd.com/read/27785509/stretchable-adhesive-and-ultra-conformable-elastomer-thin-films
#11
Nobutaka Sato, Atsushi Murata, Toshinori Fujie, Shinji Takeoka
Thermoplastic elastomers are attractive materials because of the drastic changes in their physical properties above and below the glass transition temperature (Tg). In this paper, we report that free-standing polystyrene (PS, Tg: 100 °C) and polystyrene-polybutadiene-polystyrene triblock copolymer (SBS, Tg: -70 °C) thin films with a thickness of hundreds of nanometers were prepared by a gravure coating method. Among the mechanical properties of these thin films determined by bulge testing and tensile testing, the SBS thin films exhibited a much lower elastic modulus (ca...
November 16, 2016: Soft Matter
https://www.readbyqxmd.com/read/27782523/influence-of-tio2-110-surface-roughness-on-growth-and-stability-of-thin-organic-films
#12
K Szajna, M Kratzer, D Wrana, C Mennucci, B R Jany, F Buatier de Mongeot, C Teichert, F Krok
We have investigated the growth and stability of molecular ultra-thin films, consisting of rod-like semiconducting para-hexaphenyl (6P) molecules vapor deposited on ion beam modified TiO2(110) surfaces. The ion bombarded TiO2(110) surfaces served as growth templates exhibiting nm-scale anisotropic ripple patterns with controllable parameters, like ripple depth and length. In turn, by varying the ripple depth one can tailor the average local slope angle and the local step density/terrace width of the stepped surface...
October 14, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27765562/extreme-lateral-interbody-fusion-xlif-a-single-center-clinical-and-radiological-follow-up-study-of-20-patients
#13
Enrico Tessitore, Granit Molliqaj, Karl Schaller, Oliver Pascal Gautschi
Extreme lateral interbody fusion (XLIF) is an alternative to standard posterior approaches for achieving fusion in the lumbar spine. It allows exposure of the lateral aspect of the lumbar disc through a lateral approach with the possibility to insert a wide footprint interbody cage as a stand-alone procedure or associated with a uni- or bilateral percutaneous fixation. This is a retrospective series of 20 consecutive patients operated with a XLIF procedure from 2014 to 2015. N=10 women and N=10 men with a mean age of 67...
October 17, 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/27764186/drivers-of-tree-growth-mortality-and-harvest-preferences-in-species-rich-plantations-for-smallholders-and-communities-in-the-tropics
#14
Huong Nguyen, Jerome Vanclay, John Herbohn, Jennifer Firn
There is growing interest in multi-species tropical plantations but little information exists to guide their design and silviculture. The Rainforestation Farming system is the oldest tropical polyculture planting system in the Philippines and provides a unique opportunity to understand the underlying processes affecting tree performance within diverse plantings. Data collected from 85 plots distributed across the 18 mixed-species plantations in the Philippines was used to identify the factors influencing growth, probability of harvest, and death of trees in these complex plantings...
2016: PloS One
https://www.readbyqxmd.com/read/27755757/extended-density-dependent-mortality-in-mature-conifer-forests-causes-and-implications-for-ecosystem-management
#15
Benoit Gendreau-Berthiaume, S Ellen Macdonald, J John Stadt
Understanding processes driving mortality in forests is important for comprehension of natural stand dynamics and for informing natural disturbance-based ecosystem management. There has been considerable study of mortality in forests during the self-thinning phase but we know much less about processes driving mortality in stands at later successional stages. We addressed this through study of five 1-ha spatially explicit permanent plots in mature (111-186 yr old in 2012) Pinus contorta stands in the Canadian Rocky Mountains using data from repeated measurements over a 45-yr period, dendrochronological information, and point pattern analysis...
July 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27755729/heavy-and-frequent-thinning-promotes-drought-adaptation-in-pinus-sylvestris-forests
#16
Julia A Sohn, Florian Hartig, Martin Kohler, Jürgen Huss, Jürgen Bauhus
Droughts and their negative effects on forest ecosystems are projected to increase under climate change for many regions. It has been suggested that intensive thinning could reduce drought impacts on established forests in the short-term. Most previous studies on the effect of thinning on drought impacts, however, have been confined to single forest sites. It is therefore still unclear how general and persisting the benefits of thinning are. This study assesses the potential of thinning to increase drought tolerance of the wide spread Scots pine (Pinus sylvestris) in Central Europe...
October 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27755724/fortifying-the-forest-thinning-and-burning-increase-resistance-to-a-bark-beetle-outbreak-and-promote-forest-resilience
#17
Sharon M Hood, Stephen Baker, Anna Sala
Fire frequency in low-elevation coniferous forests in western North America has greatly declined since the late 1800s. In many areas, this has increased tree density and the proportion of shade-tolerant species, reduced resource availability, and increased forest susceptibility to forest insect pests and high-severity wildfire. In response, treatments are often implemented with the goal of increasing ecosystem resilience by increasing resistance to disturbance. We capitalized on an existing replicated study of fire and stand density treatments in a ponderosa pine (Pinus ponderosa)-Douglas-fir (Pseudotsuga menziesii) forest in western Montana, USA, that experienced a naturally occurring mountain pine beetle (MPB; Dendroctonus ponderosae) outbreak 5 yr after implementation of fuels treatments...
October 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27752198/reconstruction-of-orbital-floor-fractures-with-porous-polyethylene-implants-a-prospective-study
#18
Degala Sai Krishna, Dey Soumadip
PURPOSE: The main aim of our study was to assess and evaluate the efficacy, long standing outcome and infection of porous polyethylene implants in treatment of orbital floor fractures. PATIENT AND METHODS: Twelve patients with fractures of orbital floor were included in the study. The cause of fracture was road traffic accident, self fall and cow hit respectively. They also complained of enophthalmos (n = 9), diplopia (n = 3), restricted eye movement (n = 2), impairment of infraorbital nerve (n = 3) and dystopia (n = 6)...
September 2016: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/27749076/two-photon-interference-from-the-far-field-emission-of-chip-integrated-cavity-coupled-emitters
#19
Je-Hyung Kim, Christopher J K Richardson, Richard P Leavitt, Edo Waks
Interactions between solid-state quantum emitters and cavities are important for a broad range of applications in quantum communication, linear optical quantum computing, nonlinear photonics, and photonic quantum simulation. These applications often require combining many devices on a single chip with identical emission wavelengths in order to generate two-photon interference, the primary mechanism for achieving effective photon-photon interactions. Such integration remains extremely challenging due to inhomogeneous broadening and fabrication errors that randomize the resonant frequencies of both the emitters and cavities...
October 17, 2016: Nano Letters
https://www.readbyqxmd.com/read/27726332/modulation-of-crystal-surface-and-lattice-by-doping-achieving-ultrafast-metal-ion-insertion-in-anatase-tio2
#20
Hsin-Yi Wang, Han-Yi Chen, Ying-Ya Hsu, Ulrich Stimming, Hao Ming Chen, Bin Liu
We report that an ultrafast kinetics of reversible metal-ion insertion can be realized in anatase titanium dioxide (TiO2). Niobium ions (Nb5+) were carefully chosen to dope and drive anatase TiO2 into very thin nanosheets standing perpendicularly onto transparent conductive electrode (TCE) and simultaneously construct TiO2 with an ion-conducting surface together with expanded ion diffusion channels, which enabled ultrafast metal ions diffusion across the electrolyte/solid interface and into the bulk of TiO2...
October 11, 2016: ACS Applied Materials & Interfaces
keyword
keyword
53235
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"