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https://www.readbyqxmd.com/read/28543804/au-i-%C3%A2-%C3%A2-%C3%A2-au-i-interaction-assisted-host-guest-interactions-and-stimuli-responsive-self-assembly-in-tetranuclear-alkynylgold-i-calix-4-arene-based-isocyanide-complexes
#1
Anlea Chu, Franky Ka-Wah Hau, Vivian W W Yam
Multi-stimuli-responsive tetranuclear gold(I) complexes have been prepared based on a tetra(alkynyl)calix[4]arene framework, with incorporation of a series of isocyanide ligands of tunable hydrophilicity. This class of complexes is found to exhibit high sensitivity towards group IIIA metal ions especially indium(III) ions. Drastic electronic absorption and emission changes have been observed, which could be attributed to the formation of Au(I)···Au(I) interactions during the binding event. Solvent-induced self-aggregation has also been observed upon changing the solvent environment to a more polar medium, with the formation of nanoaggregates and the turning on of the aurophilic interactions, leading to interesting luminescence and morphological changes...
May 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28540959/self-assembled-indium-tin-oxide-nanoball-embedded-omnidirectional-reflectors-for-high-photon-extraction-efficiency-in-iii-nitride-ultraviolet-emitters
#2
Semi Oh, Kwang Jae Lee, Sang-Jo Kim, Kab Ha, Jongyeul Jeong, Dongjun Kim, Kyoung-Kook Kim, Seong-Ju Park
The control of the refractive index and electrical conductivity in the dielectric layer of omnidirectional reflectors (ODRs) is essential to improve the low efficiency of AlGaN-based UV emitters. Here, we report self-assembled indium tin oxide (ITO) nanoball-embedded omnidirectional reflectors (NODRs) for use in high-efficiency AlGaN-based UV emitters at 365 nm. These NODRs consisted of a reflective Al layer, a self-assembled conducting ITO nanoball layer for current injection and spreading, and nanovoids that provided a low refractive index to achieve highly efficient UV emitters...
May 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28540957/a-skin-integrated-transparent-and-stretchable-strain-sensor-with-interactive-color-changing-electrochromic-displays
#3
Heun Park, Dong Sik Kim, Soo Yeong Hong, Chulmin Kim, Jun Yeong Yun, Seung Yun Oh, Sang Woo Jin, Yu Ra Jeong, Gyu Tae Kim, Jeong Sook Ha
In this study, we report on the development of a stretchable, transparent, and skin-attachable strain sensor integrated with a flexible electrochromic device as a human skin-inspired interactive color-changing system. The strain sensor consists of a spin-coated conductive nanocomposite film of poly(vinyl alcohol)/multi-walled carbon nanotube/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) on a polydimethylsiloxane substrate. The sensor exhibits excellent performance of high sensitivity, high durability, fast response, and high transparency...
May 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28538686/amorphous-in-ga-zn-o-powder-with-high-gas-selectivity-towards-wide-range-concentration-of-c%C3%A2-h%C3%A2-oh
#4
Hongxiang Chen, Wei Jiang, Lianfeng Zhu, Youwei Yao
Amorphous indium gallium zinc oxide (a-IGZO) powder was prepared by typical solution-based process and post-annealing process. The sample was used as sensor for detecting C₂H₅OH, H₂, and CO. Gas-sensing performance was found to be highly sensitive to C₂H₅OH gas in a wide range of concentration (0.5-1250 ppm) with the response of 2.0 towards 0.5 ppm and 89.2 towards 1250 ppm. Obvious difference of response towards C₂H₅OH, H₂, and CO was found that the response e.g., was 33.20, 6.64, and 2.84 respectively at the concentration of 200 ppm...
May 24, 2017: Sensors
https://www.readbyqxmd.com/read/28534675/gallium-in-depth-profile-in-bromine-etched-copper-indium-galium-di-selenide-cigs-thin-films-inspected-using-raman-spectroscopy
#5
Jacopo Parravicini, Maurizio Acciarri, Alberto Lomuscio, Matteo Murabito, Alessia Le Donne, Andrea Gasparotto, Simona Binetti
In the thin film solar cells domain, copper indium galium (di)selenide (CIGS) is a material with well-established photovoltaic purpose. Here the presence of a suitable [Ga]/([Ga]+[In]) (GGI) in-depth profile has proved to play a key role in the performance of cells. The implementation of a routine method based on reliable but easily available experimental techniques is mandatory to obtain information on the GGI profile of any CIGS layer, in order to achieve high efficiency chalcogenide layers. In this vein, we here propose and systematically test a simple method for the GGI profile determination based on repeated bromine etching of CIGS thin films followed by Raman analysis of the A1 peak position...
June 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28527359/nanocubes-of-indium-oxide-induce-cytotoxicity-and-apoptosis-through-oxidative-stress-in-human-lung-epithelial-cells
#6
Maqusood Ahamed, Mohd Javed Akhtar, M A Majeed Khan, Hisham A Alhadlaq, Ali Aldalbahi
The demand for semiconductor indium oxide (In2O3) nanocrystals is increasing because of their diverse applications, including in biomedicine. However, there is a scarcity of studies on the biological interaction of indium oxide nanocrystals. Here, we explored the underlying mechanisms of toxicity induced by indium oxide nanocubes in human lung epithelial (A549) cells. Prepared indium oxide nanocubes were crystalline with an average size of 21nm. Biointeraction studies have shown that indium oxide nanocubes induce cell viability reduction and cell membrane damage in a dose- and time-dependent manner...
May 9, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28524661/phonon-plasmon-coupling-and-active-cu-dopants-in-indium-arsenide-nanocrystals-studied-by-resonance-raman-spectroscopy
#7
Adam Faust, Yorai Amit, Uri Banin
Doping of semiconductor nanocrystals is an emerging tool to control their properties and has recently received increased interest as the means to characterize the impurities and their effect on the electronic characteristics of the nanocrystal evolve. We present a temperature-dependent Raman scattering study of Cu-doped InAs nanocrystals observing changes in the relative scattering intensities of the different modes upon increased dopant concentrations. First, the longitudinal optical (LO) phonon overtone mode is suppressed, indicating weakening of the coupling strength related to the effect of screening by the free electrons...
May 23, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28522844/high-performance-pvc-gel-for-adaptive-micro-lenses-with-variable-focal-length
#8
Jin Woo Bae, Eun-Jae Shin, Jaeu Jeong, Dong-Soo Choi, Jong Eun Lee, Byeong Uk Nam, Liwei Lin, Sang-Youn Kim
This paper presents a bio-inspired adaptive micro-lens with electrically tunable focus made of non-ionic high-molecular-weight polyvinyl chloride (PVC) gel. The optical device mimics the design of the crystalline lens and ciliary muscle of the human eye. It consists of a plano-convex PVC gel micro-lens on Indium Tin Oxide (ITO) glass, confined with an annular electrode operating as an artificial ciliary muscle. Upon electrical activation, the electroactive adhesive force of the PVC gel is exerted on the annular anode electrode, which reduces the sagittal height of the plano-convex PVC gel lens, resulting in focal length variation of the micro-lens...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28522242/monitoring-the-surface-quality-of-silver-plasmon-waveguides-with-nonlinear-photoemission-electron-microscopy-and-in-situ-ion-sputtering
#9
Kellie Pearce, Francis Schuknecht, Christian Späth, Benjamin Duschner, Florian Richter, Ulf Kleineberg
We use photoemission electron microscopy (PEEM) with single- and two-photon excitation to study the properties of surface plasmon polaritons (SPPs) in tapered silver stripe waveguides. Arrays of waveguides with different widths, grating coupler geometries, and taper angles are fabricated using electron beam lithography (EBL) on Si and indium-tin-oxide (ITO)-covered glass substrates. The presence of propagating SPP modes is indicated by modulations of the non-linear photoemission intensity which run along the length of the waveguide - the result of interfering SPPs reflected from the edges...
May 10, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28521090/ultrafast-vibrational-energy-transfer-in-catalytic-monolayers-at-solid-liquid-interfaces
#10
Jan Philip Kraack, Angelo Frei, Roger Alberto, Peter Hamm
We investigate the ultrafast vibrational dynamics of monolayers from adsorbed rhenium-carbonyl CO2-reduction catalysts on a semiconductor surface (indium-tin-oxide (ITO)) with ultrafast two-dimensional attenuated total reflection infrared (2D ATR IR) spectroscopy. The complexes are partially equipped with isotope-labeled ((13)C) carbonyl ligands to generate two spectroscopically distinguishable forms of the molecules. Ultrafast vibrational energy transfer between the molecules is observed via the temporal evolution of cross-peaks between their symmetric carbonyl stretching vibrations...
May 22, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28512727/variability-of-high-dose-melphalan-exposure-on-oral-mucositis-in-patients-undergoing-prophylactic-low-level-laser-therapy
#11
Gustavo Henrique Rodrigues, Graziella Chagas Jaguar, Fabio Abreu Alves, Andre Guollo, Vanessa Oliveira Camandoni, Aline Santos Damascena, Vladmir Claudio Cordeiro Lima
The present study outlines the clinical impact and risk factors of oral mucositis in 79 patients with multiple myeloma following high-dose melphalan for autologous transplant. All patients underwent daily prophylactic low-level indium gallium aluminum phosphate diode laser therapy (660 nm, 15 mW, 3.75 J/cm(2), 10 s per point) from the beginning of the conditioning regimen up to day +2. Oral mucositis assessments were made daily until hospital discharge. For analysis, oral mucositis was divided into two groups according to severity: group 1, patients with oral mucositis grade <III (n = 71) and group 2, patients with oral mucositis grade ≥III (n = 8)...
May 16, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28510427/single-crystal-proton-conduction-study-of-a-metal-organic-framework-of-modest-water-stability
#12
Jian-Bin Lin, Zaida Romero, George K H Shimizu, Biplab Joarder
A sulfonated indium (In) metal organic framework (MOF) is reported with an anionic layered structure incorporating hydrogen bonded dimethylammonium cations and water molecules. The MOF becomes amorphous in >60% relative humidity, however, impedance analysis of pelletized powders revealed a proton conduction value of over 10-3 S cm-1 at 25 °C and 40% RH, a very high proton conduction value for low humidity and moderate temperature. Given the modest humidity stability of the MOF, triaxial impedance analyses on a single crystal was performed and confirmed bulk proton conductivity over 10-3 Scm-1 along two axes corroborating the data from the pellet...
May 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28509563/the-adjunctive-soft-tissue-diode-laser-in-orthodontics
#13
Ali Borzabadi-Farahani
Lasers are a relatively new addition to the orthodontist's armamentarium. This article reviews the fundamental basic science of available soft-tissue lasers, with an emphasis on diode lasers, and discusses various adjunct applications of the diode laser for soft-tissue orthodontic procedures. Diode lasers function by cutting with an initiated hot tip and produce minimal to no interaction with healthy dental hard tissue, making them suitable for soft-tissue procedures. The contact cutting mode provides enhanced bloodless site visibility and facility to perform delicate soft tissue procedures, which is important in areas with difficult access...
April 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28509559/evaporation-driven-deposition-of-ito-thin-films-from-aqueous-solutions-with-low-speed-dip-coating-technique
#14
Takashi Ito, Hiroaki Uchiyama, Hiromitsu Kozuka
We suggest a novel wet coating process for preparing indium tin oxide (ITO) films from simple solutions containing only metal salts and water via evaporation-driven film deposition during low-speed dip coating. Homogeneous ITO precursor films were deposited on silica glass substrates from the aqueous solutions containing In(NO3)3·3H2O and SnCl4·5H2O by dip coating at substrate withdrawal speeds of 0.20-0.50 cm min(-1) and then crystallized by the heat treatment at 500-800 °C for 10-60 min under N2 gas flow of 0...
May 16, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28507839/issues-in-managing-hurthle-cell-carcinoma-of-thyroid-a-case-report
#15
Patricia Tai, Martin Korzeniowski, Evgeny Sadikov, Kurian Joseph, Angus Kirby, Jon Tonita, Aamer Mahmud
A 61-year-old woman noticed a right neck lump in October 2001. Fine needle aspiration showed follicular neoplasm, adenoma versus carcinoma. The ultrasound scan showed a solid mass of maximum dimension of 3.7 cm. She had a right thyroid lobectomy and isthmectomy in January 2002 (first surgery). The tissue specimen showed a 4.5 cm Hurthle cell carcinoma (HCC) with vascular invasion. There were no capsular invasion, extra-thyroidal extension, or margin involvement. A completion left lobectomy (second surgery) was performed two weeks later...
April 14, 2017: Curēus
https://www.readbyqxmd.com/read/28505530/photocatalytic-wastewater-purification-with-simultaneous-hydrogen-production-using-mos2-qd-decorated-hierarchical-assembly-of-znin2s4-on-reduced-graphene-oxide-photocatalyst
#16
Shuqu Zhang, Longlu Wang, Chengbin Liu, Jinming Luo, John Crittenden, Xia Liu, Tao Cai, Jili Yuan, Yong Pei, Yutang Liu
It is attractive to photocatalytically purify wastewater and simultaneously convert solar energy into clean hydrogen energy. However, it is still a challenge owing to the relatively low photocatalytic efficiency of photocatalysts. In this study, we synthesized a molybdenum disulfide (MoS2) quantum dot-decorated 3D nanoarchitecture (MoS2QDs) of indium zinc sulfide (ZnIn2S4) and reduced grapheme oxide (MoS2QDs@ZnIn2S4@RGO) photocatalyst using a simple solvothermal method. The RGO promotes the electron transfer, and the highly dispersed MoS2QDs provides numerous catalytic sites...
May 10, 2017: Water Research
https://www.readbyqxmd.com/read/28504769/semitransparent-and-flexible-perovskite-solar-cell-with-high-visible-transmittance-based-on-ultrathin-metallic-electrodes
#17
Xia-Li Ou, Jing Feng, Ming Xu, Hong-Bo Sun
We have fabricated semitransparent and flexible indium-free perovskite solar cells (PeSCs) with high visible transmittance employing two kinds of composite ultrathin metallic electrodes, MoO<sub>3</sub>/Au and MoO<sub>3</sub>/Au/Ag/MoO<sub>3</sub>/Alq<sub>3</sub>, as the bottom and top electrodes, respectively. These electrodes show superb electrical conductivity, excellent mechanical robustness, and high optical transparency which are quite suitable for semitransparent and flexible PeSCs...
May 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28503210/synthesis-of-ribavirin-2-me-c-nucleoside-analogues
#18
Fanny Cosson, Aline Faroux, Jean-Pierre Baltaze, Jonathan Farjon, Régis Guillot, Jacques Uziel, Nadège Lubin-Germain
An efficient synthetic pathway leading to two carbonated analogues of ribavirin is described. The key-steps in the synthesis of these ribosyltriazoles bearing a quaternary carbon atom in the 2'-position are an indium-mediated alkynylation and a 1,3-dipolar cyclization.
2017: Beilstein Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28497832/a-unique-semiconductor-carbon-metal-hybrid-structure-design-as-a-counter-electrode-in-dye-sensitized-solar-cells
#19
Sheng-Qi Guo, Ling-Chang Wang, Chen-Guang Zhang, Gao-Can Qi, Bing-Chuan Gu, Lu Liu, Zhi-Hao Yuan
The catalytic activity of counter electrodes (CEs) severely restricts the photovoltaic conversion efficiency of dye-sensitized solar cells. However, electrons trapped by bulk defects greatly reduce the catalytic activity of the CE. In this study, we report a novel In2S3-C-Au hybrid structure designed by simply decorating Au particles on the surface of carbon-coated hierarchical In2S3 flower-like architectures, which could avoid the abovementioned problems. This effect can be attributed to the unique contribution of indium sulfide, carbon, and Au from the hybrid structure, as well as to their synergy...
May 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28497690/a-novel-electrochemiluminescence-sensing-platform-for-precise-analysis-of-multiple-ltbi-markers
#20
Bin Zhou, Mingyao Zhu, Peihui Yang, Peihui Yang
Latent tuberculosis infection (LTBI) is one of the major contributing factors for the high incidence of tuberculosis (TB), and the low contents of LTBI markers in human serum presents a great challenge for the diagnosis of LTBI. Here we reported a novel electrochemiluminescence (ECL) sensing platform for the precise analysis of multiple LTBI markers, interferon-gamma (IFN-γ) and interleukin (IL)-2. In this approach, self-prepared carbon quantum dots (CQDs) and luminol were integrated onto gold nanoparticles (AuNPs), which were further enriched on the surface of magnetic bead (MB) to create two solid-phase ECL nanoprobes (MB@Au@CQDs and MB@Au@luminol) for improving the detection sensitivity efficiently...
May 12, 2017: ACS Applied Materials & Interfaces
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