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https://www.readbyqxmd.com/read/28819968/popcorn-derived-porous-carbon-flakes-with-an-ultrahigh-specific-surface-area-for-superior-performance-supercapacitors
#1
Jianhua Hou, Kun Jiang, Rui Wei, Muhammad Tahir, Xiaoge Wu, Ming Shen, Xiaozhi Wang, Chuanbao Cao
Popcorn-derived porous carbon flakes (PCFs) have been successfully fabricated from the biomass of maize. Utilizing the "puffing effect", the nubby maize grain turned into materials with interconnected honeycomb-like porous structure composed of carbon flakes. The following chemical activation method enabled the as-prepared products to possess optimized porous structure for electrochemical energy storage devices, such as multi-layer flake-like structures, ultrahigh specific surface area (SBET: 3301 m2 g-1), a high content of micropores (microporous surface area of 95%, especially the optimized sub-nanopores with the size of 0...
August 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28816741/reflectance-confocal-microscopy-criteria-of-pigmented-squamous-cell-carcinoma-in-situ
#2
Neda Shahriari, Jane M Grant-Kels, Harold S Rabinovitz, Margaret Oliviero, Alon Scope
Pigmented squamous cell carcinoma in situ (pSCCis) is difficult to diagnose based on clinical and dermoscopic examination. Reflectance confocal microscopy (RCM) allows noninvasive differentiation between malignant and benign pigmented skin lesions. We determined the frequency of key RCM features of pSCCis and correlated the RCM criteria with the corresponding dermoscopic and histopathologic criteria. The study included 28 lesions with biopsy-proven diagnosis of pSCCis derived from 28 patients. Clinical, dermoscopic, and RCM images of these lesions were retrospectively analyzed by 3 independent observers...
August 9, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28811608/large-spontaneous-exchange-bias-in-a-weak-ferromagnet-pb6ni9-teo6-5
#3
B Koteswararao, Tanmoy Chakrabarty, Tathamay Basu, Binoy Krishna Hazra, P V Srinivasarao, P L Paulose, S Srinath
We report the magnetic and dielectric behavior of Pb6Ni9(TeO6)5, a new compound comprising the honeycomb-like layers of S = 1 spins, through detailed structural, magnetic and dielectric investigation. An antiferromagnetic-type transition at 25 K (T N ) with weak-ferromagnetic behavior is revealed. Interestingly, a large value of coercive field of 1.32 T at 2 K is observed. The isothermal magnetization after zero-field-cooled condition, it exhibits the presence of large spontaneous exchange bias (SEB) with a magnitude of 0...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811067/aspergilloma-in-honeycomb-cysts-and-paraseptal-emphysema-an-unusual-association
#4
Guilherme Felix Louza, Gláucia Zanetti, Edson Marchiori
No abstract text is available yet for this article.
August 12, 2017: Archivos de Bronconeumología
https://www.readbyqxmd.com/read/28807589/differences-in-texture-analysis-parameters-between-active-alveolitis-and-lung-fibrosis-in-chest-ct-of-patients-with-systemic-sclerosis-a-feasibility-study
#5
Christopher Kloth, Anya C Blum, Wolfgang M Thaiss, Heike Preibsch, Hendrik Ditt, Rainer Grimmer, Jan Fritz, Konstantin Nikolaou, Hans Bösmüller, Marius Horger
RATIONALE AND OBJECTIVES: This study aimed to determine the diagnostic aid of computed tomography (CT) features for the differentiation of active alveolitis and fibrosis using a CT texture analysis (CTTA) prototype and CT densitometry in patients with systemic sclerosis (SSc) using ancillary high-resolution computed tomography (HRCT) features and their longitudinal course as standard of reference. MATERIALS AND METHODS: We retrospectively analyzed thin-slice noncontrast chest CT image data of 43 patients with SSc (18 men, mean age 51...
August 11, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28799749/closed-pore-structured-nico2o4-coated-nickel-foam-for-stable-and-effective-oil-water-separation
#6
Yan Li, Xi Zheng, Zhanheng Yan, Xiaofang Zhang, Dongliang Tian, Jianmin Ma, Lei Jiang
To solve the serious problem caused by oily wastewater pollution, unique interface design, for example, membranes with superwetting properties such as superhydrophobicity/superoleophilicity and superhydrophilicity/underwater superoleophobicity, provides a good way to achieve oil/water separation. Here, inspired by the liquid storage property of the honeycomb structure, we propose a strategy to fabricate NiCo2O4-coated nickel foams for stable and efficient oil/water separation. NiCo2O4 with a closed pore structure was formed by assembling nanoflakes with a micro/nanoscale hierarchical structure...
August 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28794939/ideally-hexagonally-ordered-tio2-nanotube-arrays
#7
Hanna Sopha, Tomas Samoril, Erik Palesch, Ludek Hromadko, Raul Zazpe, David Skoda, Michal Urbanek, Siowwoon Ng, Jan Prikryl, Jan M Macak
Ideally hexagonally ordered TiO2 nanotube layers were produced through the optimized anodization of Ti substrates. The Ti substrates were firstly covered with a TiN protecting layer prepared through atomic layer deposition (ALD). Pre-texturing of the TiN-protected Ti substrate on an area of 20×20 μm(2) was carried out by focused ion beam (FIB) milling, yielding uniform nanoholes with a hexagonal arrangement throughout the TiN layer with three different interpore distances. The subsequent anodic nanotube growth using ethylene-glycol-based electrolyte followed the pre-textured nanoholes, resulting in perfectly ordered nanotube layers (resembling honeycomb porous anodic alumina) without any point defects and with a thickness of approximately 2 μm over the whole area of the pattern...
August 2017: ChemistryOpen
https://www.readbyqxmd.com/read/28790421/penetration-depth-and-nonlocal-manipulation-of-quantum-spin-hall-edge-states-in-chiral-honeycomb-nanoribbons
#8
Yong Xu, Salah Uddin, Jun Wang, Jiansheng Wu, Jun-Feng Liu
We have studied numerically the penetration depth of quantum spin hall edge states in chiral honeycomb nanoribbons based on the Green's function method. The changing of edge orientation from armchair to zigzag direction decreases the penetration depth drastically. The penetration depth is used to estimate the gap opened for the finite-size effect. Beside this, we also proposed a nonlocal transistor based on the zigzag-like chiral ribbons in which the current is carried at one edge and the manipulation is by the edge magnetization at the other edge...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28783516/adjustable-3-d-structure-with-enhanced-interfaces-and-junctions-towards-microwave-response-using-feco-c-core-shell-nanocomposites
#9
Daoran Li, Xiaohui Liang, Wei Liu, Jianna Ma, Yanan Zhang, Guangbin Ji, Wei Meng
In this work, the 3-D honeycomb-like FeCo/C nanocomposites were synthesized through the carbon thermal reduction under an inert atmosphere. The enhanced microwave absorption properties of the composites were mainly attributed to the unique three dimensional structure of the FeCo/C nanocomposites, abundant interfaces and junctions, and the appropriate impedance matching. The Cole-Cole semicircles proved the sufficient dielectric relaxation process. The sample calcinated at 600°C for 4h showed the best microwave absorption properties...
July 31, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28783256/fabrication-of-fe3-o4-dots-embedded-in-3d-honeycomb-like-carbon-based-on-metallo-organic-molecule-with-superior-lithium-storage-performance
#10
Chengfei Li, Liuqing Li, Zhaopeng Li, Weihao Zhong, Zhenghui Li, Xiaoqing Yang, Guoqing Zhang, Haiyan Zhang
A novel metallo-organic molecule, ferrocene, is selected as building block to construct Fe3 O4 dots embedded in 3D honeycomb-like carbon (Fe3 O4 dots/3DHC) by using SiO2 nanospheres as template. Unlike previously used inorganic Fe3 O4 sources, ferrocene simultaneously contains organic cyclopentadienyl groups and inorganic Fe atoms, which can be converted to carbon and Fe3 O4 , respectively. Atomic-scale Fe distribution in started building block leads to the formation of ultrasmall Fe3 O4 dots (≈3 nm). In addition, by well controlling the feed amount of ferrocene, Fe3 O4 dots/3DHC with well-defined honeycomb-like meso/macropore structure and ultrathin carbon wall can be obtained...
August 7, 2017: Small
https://www.readbyqxmd.com/read/28777603/evidence-for-a-field-induced-quantum-spin-liquid-in-%C3%AE-rucl_-3
#11
S-H Baek, S-H Do, K-Y Choi, Y S Kwon, A U B Wolter, S Nishimoto, Jeroen van den Brink, B Büchner
We report a ^{35}Cl nuclear magnetic resonance study in the honeycomb lattice α-RuCl_{3}, a material that has been suggested to potentially realize a Kitaev quantum spin liquid (QSL) ground state. Our results provide direct evidence that α-RuCl_{3} exhibits a magnetic-field-induced QSL. For fields larger than ∼10  T, a spin gap opens up while resonance lines remain sharp, evidencing that spins are quantum disordered and locally fluctuating. The spin gap increases linearly with an increasing magnetic field, reaching ∼50  K at 15 T, and is nearly isotropic with respect to the field direction...
July 21, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28774021/mechanical-properties-of-auxetic-cellular-material-consisting-of-re-entrant-hexagonal-honeycombs
#12
Xiangwen Zhang, Deqing Yang
A preliminary study of the mechanical properties of auxetic cellular material consisting of re-entrant hexagonal honeycombs is presented. For different scales of the honeycombs, the finite element method (FEM) and experimental models are used to perform a parametric analysis on the effects of the Poisson's ratio (cell angle) and the relative density (cell thickness) of honeycombs on bearing capacity and dynamic performance of the auxetic material. The analysis demonstrates that the ultimate bearing capacity of the presented auxetic cellular material is scale-independent when the Poisson's ratio and the relative density are kept constant...
November 7, 2016: Materials
https://www.readbyqxmd.com/read/28772507/band-gap-tuning-in-2d-layered-materials-by-angular-rotation
#13
Javier Polanco-Gonzalez, Jesús Alfredo Carranco-Rodríguez, José L Enríquez-Carrejo, Pierre G Mani-Gonzalez, José Manuel Domínguez-Esquivel, Manuel Ramos
We present a series of computer-assisted high-resolution transmission electron (HRTEM) simulations to determine Moiré patters by induced twisting effects between slabs at rotational angles of 3°, 5°, 8°, and 16°, for molybdenum disulfide, graphene, tungsten disulfide, and tungsten selenide layered materials. In order to investigate the electronic structure, a series of numerical simulations using density functional methods (DFT) methods was completed using Cambridge serial total energy package (CASTEP) with a generalized gradient approximation to determine both the band structure and density of states on honeycomb-like new superlattices...
February 8, 2017: Materials
https://www.readbyqxmd.com/read/28765523/robust-spin-correlations-at-high-magnetic-fields-in-the-harmonic-honeycomb-iridates
#14
K A Modic, B J Ramshaw, J B Betts, Nicholas P Breznay, James G Analytis, Ross D McDonald, Arkady Shekhter
The complex antiferromagnetic orders observed in the honeycomb iridates are a double-edged sword in the search for a quantum spin-liquid: both attesting that the magnetic interactions provide many of the necessary ingredients, while simultaneously impeding access. Focus has naturally been drawn to the unusual magnetic orders that hint at the underlying spin correlations. However, the study of any particular broken symmetry state generally provides little clue about the possibility of other nearby ground states...
August 1, 2017: Nature Communications
https://www.readbyqxmd.com/read/28762272/atomically-thin-interfacial-suboxide-key-to-hydrogen-storage-performance-enhancements-of-magnesium-nanoparticles-encapsulated-in-reduced-graphene-oxide
#15
Liwen F Wan, Yi-Sheng Liu, Eun Seon Cho, Jason D Forster, Sohee Jeong, Hsiao-Tsu Wang, Jeffrey J Urban, Jinghua Guo, David Prendergast
As a model system for hydrogen storage, magnesium hydride exhibits high hydrogen storage density, yet its practical usage is hindered by necessarily high temperatures and slow kinetics for hydrogenation-dehydrogenation cycling. Decreasing particle size has been proposed to simultaneously improve the kinetics and decrease the sorption enthalpies. However, the associated increase in surface reactivity due to increased active surface area makes the material more susceptible to surface oxidation or other side reactions, which would hinder the overall hydrogenation-dehydrogenation process and diminish the capacity...
August 3, 2017: Nano Letters
https://www.readbyqxmd.com/read/28761131/dirac-magnon-nodal-loops-in-quasi-2d-quantum-magnets
#16
S A Owerre
In this report, we propose a new concept of one-dimensional (1D) closed lines of Dirac magnon nodes in two-dimensional (2D) momentum space of quasi-2D quantum magnetic systems. They are termed "2D Dirac magnon nodal-line loops". We utilize the bilayer honeycomb ferromagnets with intralayer coupling J and interlayer coupling J L , which is realizable in the honeycomb chromium compounds CrX3 (X ≡ Br, Cl, and I). However, our results can also exist in other layered quasi-2D quantum magnetic systems. Here, we show that the magnon bands of the bilayer honeycomb ferromagnets overlap for J L  ≠ 0 and form 1D closed lines of Dirac magnon nodes in 2D momentum space...
July 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28752869/synthetic-ability-of-dinuclear-mesocates-containing-1-3-bis-diazinecarboxamide-benzene-bridging-ligands-to-form-complexes-of-increased-nuclearity-crystal-structures-magnetic-properties-and-theoretical-studies
#17
Maria A Palacios, Jessica Morlieras, Juan Manuel Herrera, Antonio J Mota, Euan K Brechin, Smail Triki, Enrique Colacio
Triple stranded Ni-metallacyclic complexes Na2.5[Ni2(bpcb)3]·0.5OH·18.5H2O (1) and Na2[Ni2(bpzcb)3]·16H2O (2), and double stranded Cu-metallacyclic complexes [Cu2(bpcb)2(H2O)2]·8H2O (3) and [Cu2(bpzcb)2(H2O)2]·4H2O (4) have been assembled from the tailored bisbidentate bridging ligands, 1,3-bis(pyrimidine-2-carboxamide)benzene (H2bpcb) and 1,3-bis(pyrazine-2-carboxamide)benzene (H2bpzcb), and the corresponding nitrate salts of the metal ions. Following the "complex as ligand" strategy, 1 can be assembled with either Ni(2+), Co(2+) ions or the [Mn(acen)Cl] complex to afford unique, neutral, bent trinuclear molecules [M(II)Ni(bpcb)3]·xH2O (5 and 6) and the 2D honeycomb-like complex (PPh4){[Ni2(bpcb)3]2[Mn(acen)]3} (7), respectively...
July 28, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28749742/computed-tomographic-evaluation-of-posttreatment-soft-tissue-changes-by-using-a-lymphedema-scoring-system-in-patients-with-oral-cancer
#18
Masaya Akashi, Shun Teraoka, Yasumasa Kakei, Junya Kusumoto, Takumi Hasegawa, Tsutomu Minamikawa, Kazunobu Hashikawa, Takahide Komori
BACKGROUND: This study aimed to evaluate posttreatment soft-tissue changes in patients with oral cancer with computed tomography (CT). To accomplish that purpose, a scoring system was established, referring to the criteria of lower leg lymphedema (LE). METHODS AND RESULTS: One hundred and six necks in 95 patients who underwent oral oncologic surgery with neck dissection (ND) were analyzed retrospectively using routine follow-up CT images. A two-point scoring system to evaluate soft-tissue changes (so-called "LE score") was established as follows: Necks with a "honeycombing" appearance were assigned 1 point...
July 27, 2017: Lymphatic Research and Biology
https://www.readbyqxmd.com/read/28742059/spanning-the-scales-of-mechanical-metamaterials-using-time-domain-simulations-in-transformed-crystals-graphene-flakes-and-structured-soils
#19
Ronald Aznavourian, Tania Michelle Guenneau-Puvirajesinghe, Stephane Brule, Stefan Enoch, Sebastien Roger Guenneau
We begin with a brief historical survey of discoveries of quasi-crystals and graphene, and then introduce the concept of transformation crystallography, which consists of the application of geometric transforms to periodic structures. We consider motifs with three-fold, four-fold and six-fold symmetries according to the crystallographic restriction theorem. Furthermore, we define motifs with five-fold symmetry such as quasi-crystals generated by a cut-and-projection method from periodic structures in higher-dimensional space...
July 25, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28741064/injectable-sustained-release-depots-of-plga-microspheres-for-insoluble-drugs-prepared-by-hot-melt-extrusion
#20
Yuting Guo, Yunning Yang, Luying He, Rong Sun, Chenguang Pu, Bin Xie, Haibing He, Yu Zhang, Tian Yin, Yanjiao Wang, Xing Tang
PURPOSE: Progesterone (PRG) was selected as a model drug to develop a long-acting injection system for poorly water-soluble drugs. METHODS: Microspheres with high density-low porosity were prepared by hot-melt extrusion (HME) combined with wet-milling as the representative formulation, and a microcrystal suspension was also studied as a comparison. The morphology, particle size and distribution, polymorphism, drug distribution, density and porosity were characterized by scanning electron microscopy, laser diffraction particle size analyzer, power X-ray diffraction and DSC respectively...
July 24, 2017: Pharmaceutical Research
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