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https://www.readbyqxmd.com/read/28230969/anatase-101-like-structural-model-revealed-for-metastable-rutile-tio2-011-surface
#1
Meiling Xu, Sen Shao, Bo Gao, Jian Lv, Quan Li, Yanchao Wang, Hui Wang, Lijun Zhang, Yanming Ma
Titanium dioxide has been widely used as efficient transition metal oxide photocatalyst. However, its photocatalytic activity is limited to ultraviolet spectrum range due to the deficient large bandgap beyond 3 eV. Efforts towards to reduce the bandgap for achieving a broader spectrum range of light absorption are attempted with a success on the experimental synthesis of dopant-free metastable surface structure of rutile-type TiO2 (011) 21. This new surface phase possesses a much reduced bandgap of ~2.1 eV, showing a great potential for an excellent photocatalyst covering a wide range of visible light...
February 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28227148/towards-a-multi-wavelength-spectroscopy-platform-for-blood-characterization-and-analysis
#2
Alireza Avakh Kisomi, Hamza Landari, Mounir Boukadoum, Amine Miled, Benoit Gosselin, Alireza Avakh Kisomi, Hamza Landari, Mounir Boukadoum, Amine Miled, Benoit Gosselin, Hamza Landari, Benoit Gosselin, Amine Miled, Mounir Boukadoum
Passing multiple light wavelengths through a blood sample makes it possible to investigate the presence and composition of cells, metabolytes and analytes such as blood cells, glucose, lactate and oxygen, providing valuable indications for diagnostic and health monitoring. In this paper, we present a test prototype of a multi-wavelength blood spectroscopy platform integrated with a microfluidic substrate to collect and convey blood samples through a series of micro-LEDs and a photo-detector. This spectroscopy platform is a proof of concept for a system that can collect absorbance and transmittance parameters of blood samples at several wavelengths within the visible and NIR spectrum, and transmit them wirelessly to a base station for real-time calculation and analysis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226925/human-physical-condition-rf-sensing-at-thz-range
#3
A Vorobyov, E Daskalaki, C Hennemann, J-D Decotignie, A Vorobyov, E Daskalaki, C Hennemann, J-D Decotignie, E Daskalaki, C Hennemann, A Vorobyov, J-D Decotignie
The skin response to high radio frequency has been associated with the human physical condition and most prominently with the stress. The objective of this study is to investigate the possibility to detect mental and light physical stress through the measurement of skin reflectance in the mm-wave/sub-THz band. Two frequency bands have been considered, 75-110 GHz (Band-I) and 325-500 GHz (Band-II), while the measurements have been performed in the three different locations, the arm, the dorsal side of the hand and the fingertip...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225261/structural-color-for-additive-manufacturing-3d-printed-photonic-crystals-from-block-copolymers
#4
Bret M Boyle, Tracy A French, Ryan Michael Pearson, Blaine G McCarthy, Garret M Miyake
The incorporation of structural color into 3D printed parts is reported, presenting an alternative to the need for pigments or dyes for colored parts produced through additive manufacturing. Thermoplastic build materials composed of dendritic block copolymers were designed, synthesized, and used to additively manufacture plastic parts exhibiting structural color. The reflection properties of the photonic crystals arise from the periodic nanostructure formed through block copolymer self-assembly during polymer processing...
February 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28225115/solvothermal-assisted-synthesis-of-self-assembling-tio2-nanorods-on-large-graphitic-carbon-nitride-sheets-with-their-anti-recombination-in-the-photocatalytic-removal-of-cr-vi-and-rhodamine-b-under-visible-light-irradiation
#5
Dingze Lu, Pengfei Fang, Wenhui Wu, Junqian Ding, Lulu Jiang, Xiaona Zhao, Chunhe Li, Minchen Yang, Yuanzhi Li, Dahai Wang
TiO2-based nanorods (TNRs) were self-assembled on large graphitic carbon nitride (g-C3N4) sheets via the solvothermal-assisted route. The results demonstrated that the effective anchoring of TNRs (a side length of ca. 200-300 nm) was highly dispersed on the surface of whole g-C3N4 sheets. The shift in the Ti 2p XPS core level spectrum indicated an increase in the net positive charge of the Ti ions, ensuring the formation of an interface between TNRs and g-C3N4. The charge transferred from g-C3N4 sheets to TNRs effectively prevented the recombination of excited charges, which is consistent with the significant quenching of PL...
February 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/28224016/characterization-of-major-metabolites-of-polymethoxylated-flavonoids-in-pericarpium-citri-reticulatae-using-liver-microsomes-immobilized-on-magnetic-nanoparticles-coupled-with-uplc-ms-ms
#6
Jun Lei, Ying Xue, Yi-Ming Liu, Xun Liao
The peels of citrus fruits (Pericarpium Citri Reticulatae, PCR) have long been used in traditional Chinese medicines (TCMs). Polymethoxylated flavonoids (PMFs) were found to be the main components present in PCR extracts, but their metabolism remains unclear which restrain the utilization of this TCM. In the present work, rat liver microsomes were immobilized on magnetic nanoparticles (LMMNPs) for in vitro metabolic study on the whole PMFs of PCR. LMMNPs were characterized by transmission electron microscope and Fourier-transform infrared spectrum...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28221804/semiconductor-seeded-nanorods-with-graded-composition-exhibiting-high-quantum-yield-high-polarization-and-minimal-blinking
#7
Ido Hadar, John Patrick Philbin, Yossef Efraim Panfil, Shany Neyshtadt, Itai Lieberman, Hagai Eshet, Sorin Lazar, Eran Rabani, Uri Banin
Seeded semiconductor nanorods represent a unique family of quantum confined materials that manifest characteristics of mixed dimensionality. They show polarized emission with high quantum yield and fluorescence switching under an electric field, features that are desirable for use in display technologies and other optical applications. So far, their robust synthesis has been limited mainly to CdSe/CdS heterostructures, thereby constraining the spectral tunability to the red region of the visible spectrum. Herein we present a novel synthesis of CdSe/Cd1-xZnxS seeded nanorods with radially graded composition that show bright and highly polarized green emission with minimal intermittency, as confirmed by ensemble and single nanorods optical measurements...
February 21, 2017: Nano Letters
https://www.readbyqxmd.com/read/28221764/correlation-of-bandgap-reduction-with-inversion-response-in-si-gesn-high-k-metal-stacks
#8
Christian Schulte-Braucks, Keyvan Narimani, Stefan Glass, Nils von den Driesch, Jean-Michel Hartmann, Zoran Ikonic, Valeri V Afanas'ev, Qing-Tai Zhao, Siegfried Mantl, Dan Buca
The bandgap tunability of (Si)GeSn group IV semiconductors opens a new era in Si-technology. Depending on the Si/Sn contents, direct and indirect bandgaps in the range of 0.4 eV to 0.8 eV can be obtained, offering a broad spectrum of both photonic and low power electronic applications. In this work, we systematically studied capacitance-voltage characteristics of high-k/metal gate stacks formed on GeSn and SiGeSn alloys with Sn-contents ranging from 0 to 14 at.% and Si-contents from 0 to 10 at.% particularly focusing on the minority carrier inversion response...
February 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28221387/one-step-in-situ-synthesis-of-core-shell-structured-cr2o3-p-fibrous-phosphorus-hybrid-composites-with-highly-efficient-full-spectrum-response-photocatalytic-activities
#9
Hongpeng Zhou, Shixin Xu, Dingke Zhang, Shijian Chen, Junkai Deng
Making full use of solar energy and achieving high charge separation efficiency are critical factors for the photocatalysis technique. In this work, we report core-shell structured fibrous phosphorus (f-P) coated P-doped Cr2O3 (Cr2O3:P@f-P) hybrid composites with a strong optical absorption in the full region of 200-2600 nm. The Cr2O3:P@f-P hybrid composites exhibit a record photocatalytic efficiency under UV, visible and near-infrared light irradiation, demonstrating as promising photocatalysts for the full utilization of solar energy...
February 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28220006/chiral-optical-fields-a-unified-formulation-of-helicity-scattered-from-particles-and-dichroism-enhancement
#10
Manuel Nieto-Vesperinas
We establish a general unified formulation which, using the optical theorem of electromagnetic helicity, shows that dichorism is a phenomenon arising in any scattering-or diffraction-process, elastic or not, of chiral electromagnetic fields by objects either chiral or achiral. It is shown how this approach paves the way to overcoming well-known limitations of standard circular dichroism, like its weak signal or the difficulties of using it with magnetodielectric particles. Based on the angular spectrum, representation of optical fields with only right circular or left circular plane waves, we introduce beams with transverse elliptic polarization and possessing a longitudinal component...
March 28, 2017: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28218869/child-behaviors-of-young-children-with-autism-spectrum-disorder-across-play-settings
#11
Megan MacDonald, Bridget Hatfield, Erica Twardzik
The hallmark characteristics of a diagnosis of autism spectrum disorder (ASD) are deficits in social communicative skills and the use of repetitive and/or stereotyped behaviors. In addition, children with ASD experience known motor-skill delays. The purpose of this study was to examine salient child behaviors of young children with and without ASD in 2 distinctly different play settings: a traditional social-play-based setting and a motor-behavior-based play setting. Child behavior (engagement toward parent, negativity, and attention) and dyad characteristics (connectedness) were examined in 2 distinctly different play settings...
January 2017: Adapted Physical Activity Quarterly: APAQ
https://www.readbyqxmd.com/read/28218505/theoretically-manipulating-quantum-dots-on-two-dimensional-2d-tio2-monolayer-for-effective-visible-light-absorption
#12
Ting Liao, Ziqi Sun, Shi Xue Dou
Low solar energy harvesting and conversion efficiency has become a major problem in solar energy science and engineering owing to the difficulty in capturing solar energy across the wide solar spectrum, especially in the visible light range. Inspired by the extraordinary properties of materials arising from decreased dimensions, in this study, we explore a nano-contact system formed by a two-dimensional (2D) TiO2 monolayer and II-VI semiconductor (CdX)13 (X = S, Se and Te) nanocages for engineering the visible light absorption...
February 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28214745/rapid-detection-and-quantification-of-enterovirus-71-by-a-portable-surface-plasmon-resonance-biosensor
#13
Briliant Adhi Prabowo, Robert Y L Wang, Muhammad Khari Secario, Po-Ting Ou, Azharul Alom, Jia-Jung Liu, Kou-Chen Liu
This study presents the first report on a label-free detection and rapid quantification method for human enterovirus 71 (EV71) using a portable surface plasmon resonance (SPR) system. The SPR sensor instrument was configured to run on low power in a miniaturized platform to improve the device portability for a wider application both in laboratories and in the field. A color tunable organic light emitting diode in red spectrum was attached on a trapezoidal prism for the disposable light source module. The SPR signal processing using integration area under the reflectivity curve is applied for optimum signal to noise ratio (SNR) enhancement...
January 21, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28213348/the-plant-economic-spectrum-in-bryophytes-a-comparative-study-in-subalpine-forest
#14
Zhe Wang, Xin Liu, Maaike Y Bader, Defeng Feng, Weikai Bao
PREMISE OF THE STUDY: Tradeoffs among functional traits of vascular plants are starting to be better understood, but it is unclear whether bryophytes possess similar tradeoffs or how trait relationships, or the 'economic spectrum', differ between the two groups. METHODS: We determined functional-trait values [including shoot mass per area (SMA), light-saturated assimilation rate (Amass), dark respiration rate (Rdmass), N and P concentrations (Nmass and Pmass), and photosynthetic N and P use efficiency (PNUE and PPUE)] and their bivariate relationships for 28 bryophytes growing in a subalpine old-growth fir forest on the eastern Tibetan Plateau...
February 17, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28210796/optogenetic-switches-for-light-controlled-gene-expression-in-yeast
#15
REVIEW
Francisco Salinas, Vicente Rojas, Verónica Delgado, Eduardo Agosin, Luis F Larrondo
Light is increasingly recognized as an efficient means of controlling diverse biological processes with high spatiotemporal resolution. Optogenetic switches are molecular devices for regulating light-controlled gene expression, protein localization, signal transduction and protein-protein interactions. Such molecular components have been mainly developed through the use of photoreceptors, which upon light stimulation undergo conformational changes passing to an active state. The current repertoires of optogenetic switches include red, blue and UV-B light photoreceptors and have been implemented in a broad spectrum of biological platforms...
February 16, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28210733/super-high-energy-density-single-bonded-trigonal-nitrogen-allotrope-a-chemical-twin-of-the-cubic-gauche-form-of-nitrogen
#16
Sergey V Bondarchuk, Boris F Minaev
A new ambient-pressure metastable single-bonded 3D nitrogen allotrope (TrigN) of trigonal symmetry (space group R3[combining macron]) was calculated using density functional theory (DFT). A comprehensive characterization of this material, comprising thermodynamic, elastic, and spectral (vibrational, UV-vis absorption, and nuclear magnetic resonance) properties, was performed. Using high-throughput band structure calculation, the TrigN phase was characterized as an insulator with an indirect band gap of 2.977 eV...
February 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28207234/potassium-iodide-potentiates-broad-spectrum-antimicrobial-photodynamic-inactivation-using-photofrin
#17
Liyi Huang, Grzegorz Szewczyk, Tadeusz Sarna, Michael R Hamblin
It is known that noncationic porphyrins such as Photofrin (PF) are effective in mediating antimicrobial photodynamic inactivation (aPDI) of Gram-positive bacteria or fungi. However, the aPDI activity of PF against Gram-negative bacteria is accepted to be extremely low. Here we report that the nontoxic inorganic salt potassium iodide (KI) at a concentration of 100 mM when added to microbial cells (10(8)/mL) + PF (10 μM hematoporphyrin equivalent) + 415 nm light (10 J/cm(2)) can eradicate (>6 log killing) five different Gram-negative species (Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae, Proteus mirabilis, and Acinetobacter baumannii), whereas no killing was obtained without KI...
February 23, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/28205369/parental-psychopathology-and-expectations-for-the-futures-of-children-with-autism-spectrum-disorder
#18
Paul Andrew Thomas, Jake S King, Jenna L Mendelson, Rosemery O Nelson-Gray
BACKGROUND: The influence of parental psychopathology and parental expectations on child well-being is well documented among typically developing populations. However, to date little research has examined the relationship among these factors in families of children with autism spectrum disorder (ASD). This study examines an observed relationship between parental psychopathology and expectations in families with children with ASD in the light of research in other populations. METHOD: Twenty-four parents of children diagnosed with ASD were assessed for symptoms of psychopathology...
February 16, 2017: Journal of Applied Research in Intellectual Disabilities: JARID
https://www.readbyqxmd.com/read/28198891/photoacoustic-resonance-by-spatial-filtering-of-focused-ultrasound-transducers
#19
Dongyel Kang, Bahman Lashkari, Andreas Mandelis
The effect of a spherically focused ultrasound (US) transducer (TD) on photoacoustic (PA) measurements is analytically investigated using the concept of a virtual point detector. The derived analytical results indicate that the limited numerical aperture (NA) of the PA detector takes on the role of spatial filtering of the induced PA waves, which leads to the occurrence of a peak frequency in the PA spectrum. The mathematical description of this phenomenon is similar to the result of resonance peaks of light propagation in dielectrics...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28197916/regulation-of-plant-cellular-and-organismal-development-by-sumo
#20
Nabil Elrouby
This chapter clearly demonstrates the breadth and spectrum of the processes that SUMO regulates during plant development. The gross phenotypes observed in mutants of the SUMO conjugation and deconjugation enzymes reflect these essential roles, and detailed analyses of these mutants under different growth conditions revealed roles in biotic and abiotic stress responses, phosphate starvation, nitrate and sulphur metabolism, freezing and drought tolerance and response to excess copper. SUMO functions also intersect with those regulated by several hormones such as salicylic acid , abscisic acid , gibberellins and auxin, and detailed studies provide mechanistic clues of how sumoylation may regulate these processes...
2017: Advances in Experimental Medicine and Biology
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