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Sandesh Pai, Michael Moos, Maximilian H Schreck, Christoph Lambert, Dirk G Kurth
The structure and properties of metallo-supramolecular polyelectrolytes (MEPEs) self-assembled from rigid 2,6-bis(2-pyridyl)pyrimidine and the metal ions Fe(II) and Co(II) are presented. While FeL1-MEPE (L1 = 1,4-bis[2,6-bis(2-pyridyl)pyrimidin-4-yl]benzene) is deep blue, FeL2- and CoL2-MEPE (L2 = 5,5'-bis[2,6-bis(2-pyridyl)pyrimidin-4-yl]-2,2'-bithiophene) are intense green and red in color, respectively. These novel MEPEs display a high extinction coefficient and solvatochromism. Ligand L2 shows a high absolute fluorescence quantum yield (Φf = 82%)...
January 20, 2017: Inorganic Chemistry
Kai-Wei Chang, Wei Ji, Chao-Cheng Kaun
The way in which states of a topological insulator (TI) transform from monolayer to bulk is an important issue for applications in spintronics. However, unlike graphite, most layered materials are difficult to exfoliate. Using first-principles calculations, we predict that thallium selenide (TlSe) will be a layered TI with rather weak interlayer coupling and thus it should be exfoliated easily. The evolution of the topological states can also be driven by doping with indium (In) atoms or applying lateral strains...
January 20, 2017: Physical Chemistry Chemical Physics: PCCP
Jinhwan Lee, Kunsik An, Phillip Won, Yoonseok Ka, Hyejin Hwang, Hyunjin Moon, Yongwon Kwon, Sukjoon Hong, Changsoon Kim, Changhee Lee, Seung Hwan Ko
Although solution processed metal nanowire (NW) percolation networks are a strong candidate to replace commercial indium tin oxide, their performance is limited in thin film device applications due to reduced effective electrical areas arising from the dimple structure and percolative voids that single size metal NW percolation networks inevitably possess. Here, we present a transparent electrode based on a dual-scale silver nanowire (AgNW) percolation network embedded in a flexible substrate to demonstrate a significant enhancement in the effective electrical area by filling the large percolative voids present in a long/thick AgNW network with short/thin AgNWs...
January 20, 2017: Nanoscale
Alexandre B Kremer, Ryan J Andrews, Matthew J Milner, Xu R Zhang, Tannaz Ebrahimi, Brian O Patrick, Paula L Diaconescu, Parisa Mehrkhodavandi
The impact of the metal size and Lewis acidity on the polymerization activity of group 13 metal complexes was studied, and it was shown that, within the same ligand family, indium complexes are far more reactive and selective than their gallium analogues. To this end, gallium and aluminum complexes supported by a tridentate diaminophenolate ligand, as well as gallium complexes supported by N,N'-ethylenebis(salicylimine)(salen) ligands, were synthesized and compared to their indium analogues. Using the tridentate ligand set, it was possible to isolate the gallium chloride complexes 3 and (±)-4 and the aluminum analogues 5 and (±)-6...
January 19, 2017: Inorganic Chemistry
Wenfei Shen, Jianguo Tang, Yao Wang, Jixian Liu, Linjun Huang, Weichao Chen, Lanlan Yang, Wei Wang, Yanxin Wang, Renqiang Yang, Jungheum Yun, Laurence A Belfiore
A new way was meticulously designed to utilize the localized surface plasmon resonance (LSPR) effect and the light scattering effect of silver nanoplate (Ag-nPl) and core-shell Ag@SiO2 nanoparticles (Ag@SiO2-NPs) to enhance the photovoltaic performances of polymer solar cells (PSCs). To prevent direct contact between silver nanoparticles (Ag-NPs) and photo-active materials which will cause electrons quenching, bare Ag-nPl were spin-coated on indium tin oxide and silica capsulated Ag-NPs were incorporated to PBDTTT-C-T:PC71BM active layer...
January 18, 2017: ACS Applied Materials & Interfaces
Taekyu Ryu, Dahan Eom, Seohyun Shin, Jeong-Yu Son, Phil Ho Lee
A palladium-catalyzed propargyl substitution reaction of propargyl acetates with indium organothiolates is developed for the synthesis of multisubstituted allenyl sulfides. This procedure can be applied to the synthesis of multisubstituted furans and pyrroles via tandem palladium-catalyzed propargyl substitution and cycloisomerization reaction in one pot.
January 17, 2017: Organic Letters
Sut Kam Ho, Dario Machado Garcia
A two-pulse laser-excited atomic fluorescence (LEAF) technique at 193 nm wavelength was applied to the analysis of indium tin oxide (ITO) layer on polyethylene terephthalate (PET) film. Fluorescence emissions from analytes were induced from plumes generated by first laser pulse. Using this approach, non-selective LEAF can be accomplished for simultaneous multi-element analysis and it overcomes the handicap of strict requirement for laser excitation wavelength. In this study, experimental conditions including laser fluences, times for gating and time delay between pulses were optimized to reveal high sensitivity with minimal sample destruction and penetration...
January 1, 2017: Applied Spectroscopy
Yunxia Jin, Kaiqing Wang, Yuanrong Cheng, Qibing Pei, Yuxi Xu, Fei Xiao
In this work, a composite silver nanowire (AgNW) transparent electrode that is large-area ultra-smooth without conductivity or transmittance scarifice, removable but with good resistance to both water and organic solvent is reported. Via a simple low-temperature solution process without complicated transfer steps or additional pressure pressing, a new kind of AgNWs composite with biocompatible and patternable chitosan polymer complex demonstrates a quite low RMS (root mean square) roughness ~7 nm at a largest reported scan size of 50 μm*50 μm, which is among the best flat surface...
January 16, 2017: ACS Applied Materials & Interfaces
Hiroyuki Kimura, Hirokazu Matsuda, Yu Ogawa, Hiroyuki Fujimoto, Kentaro Toyoda, Naotaka Fujita, Kenji Arimitsu, Keita Hamamatsu, Yusuke Yagi, Masahiro Ono, Nobuya Inagaki, Hideo Saji
Insulinoma is a tumor derived from pancreatic β-cells, and the resulting hyperinsulinemia leads to characteristic hypoglycemia. Recent studies have reported the frequent overexpression of glucagon-like peptide-1 receptor (GLP-1R) in human insulinomas, suggesting that the binding of a radiolabeled compound to GLP-1R is useful for the imaging of such tumors. Exendin(9-39), a fragment peptide of exendin-3 and -4, binds GLP-1R with high affinity and acts as an antagonist. Accordingly, radiolabeled exendin(9-39) derivatives have also been investigated as insulinoma imaging probes that might be less likely to induce hypoglycemia...
January 3, 2017: Bioorganic & Medicinal Chemistry
Paul Cullinan, Xavier Muñoz, Hille Suojalehto, Raymond Agius, Surinder Jindal, Torben Sigsgaard, Anders Blomberg, Denis Charpin, Isabella Annesi-Maesano, Mridu Gulati, Yangho Kim, Arthur L Frank, Metin Akgün, David Fishwick, Rafael E de la Hoz, Subhabrata Moitra
Occupational exposure is an important, global cause of respiratory disease. Unlike many other non-communicable lung diseases, the proximal causes of many occupational lung diseases are well understood and they should be amenable to control with use of established and effective approaches. Therefore, the risks arising from exposure to silica and asbestos are well known, as are the means of their prevention. Although the incidence of occupational lung disease has decreased in many countries, in parts of the world undergoing rapid economic transition and population growth-often with large informal and unregulated workforces-occupational exposures continue to impose a heavy burden of disease...
January 6, 2017: Lancet Respiratory Medicine
Po-Hsun Chen, Ting-Chang Chang, Kuan-Chang Chang, Tsung-Ming Tsai, Chih-Hung Pan, Min-Chen Chen, Yu-Ting Su, Chih-Yang Lin, Yi-Ting Tseng, Hui-Chun Huang, Huaqiang Wu, Ning Deng, He Qian, Simon M Sze
In this study, an O2 inductively coupled plasma (ICP) treatment was developed in order to modify the characteristics of indium tin oxide (ITO) film for use as an insulator in resistive random access memory (RRAM). After the O2 plasma treatment, the previously conductive ITO film is oxidized and becomes less conductive. In addition, after capping the same ITO material for use as a top electrode, we found that the ITO/ITO(O2 plasma)/TiN device exhibits very stable and robust resistive switching characteristics...
January 10, 2017: ACS Applied Materials & Interfaces
Soo Jin Kim, Mark L Brongersma
Dynamically-controlled flat optics relies on achieving active and effective control over light-matter interaction in ultrathin layers. A variety of metasurface designs have achieved efficient amplitude and phase modulation. Particularly, noteworthy progress has been made with the incorporation of newly emerging electro-optical materials into such metasurfaces, including graphene, phase change materials, and transparent conductive oxides. In this Letter, we demonstrate dynamic light-matter interaction in a silicon-based subwavelength grating that supports a guided mode resonance...
January 1, 2017: Optics Letters
Chong Chen, Lanyu Ling, Fumin Li
In this paper, to improve the power conversion efficiencies (PCEs) of quantum dot-sensitized solar cells (QDSSCs) based on CdS-sensitized TiO2 nanotube (TNT) electrodes, two methods are employed on the basis of our previous work. First, by replacing the traditional single-sided working electrodes, double-sided transparent TNT/ITO (DTTO) electrodes are prepared to increase the loading amount of quantum dots (QDs) on the working electrodes. Second, to increase the light absorption of the CdS-sensitized DTTO electrodes and improve the efficiency of charge separation in CdS-sensitized QDSSCs, copper indium disulfide (CuInS2) is selected to cosensitize the DTTO electrodes with CdS, which has a complementary property of light absorption with CdS...
December 2017: Nanoscale Research Letters
Xiaochun Tian, Feng Zhao, Lexing You, Xuee Wu, Zhiyong Zheng, Ranran Wu, Yanxia Jiang, Shigang Sun
Extracellular electron transfer (EET) and bioluminescence are both important for microbial growth and metabolism, but the mechanism of interaction between EET and bioluminescence is poorly understood. Herein, we demonstrate an exclusively respiratory luminous bacterium, Shewanella woodyi, which possesses EET ability and electron communication at the interface of S. woodyi and solid substrates via charge and discharge methods. Using an electro-chemiluminescence apparatus, our results confirmed that the FMN/FMNH2 content and the redox status of cytochrome c conjointly regulated the bioluminescence intensity when the potential of an indium-tin oxide electrode was changed...
January 18, 2017: Physical Chemistry Chemical Physics: PCCP
Xin-Dong Zhao, Yan-Qing Li, Heng-Yang Xiang, Yi-Bo Zhang, Jing-De Chen, Lu-Hai Xu, Jian-Xin Tang
Inverted organic light-emitting diode (OLED) has attracted extensive attention due to the demand in active-matrix OLED display panels as its geometry enables the direct connection with n-channel transistor backplane on the substrate. One key challenge of high-performance inverted OLED is an efficient electron-injection layer with superior electrical and optical properties to match the indium tin oxide cathode on substrate. We here propose a synergistic electron-injection architecture using surface modification of ZnO layer to simultaneously promote electron injection into organic emitter and enhance out-coupling of waveguided light...
January 11, 2017: ACS Applied Materials & Interfaces
Elham Ashrafzadeh Afshar, Mohammad Ali Taher, Hamid Fazelirad, Matin Naghizadeh
A new, simple and efficient method, including dispersive liquid-liquid-solidified floating organic drop microextraction and then electrothermal atomic absorption spectrometry, has been developed for the preconcentration and determination of ultratrace amounts of indium. The method was applied to preconcentrate the indium-1-(2-pyridylazo)-2-naphthol complex in 25 μL 1-undecanol. The various factors affecting the extraction efficiency, such as pH, type and volume of extraction solvent, type and volume of disperser solvent, sample volume, ionic strength, and ligand concentration, were investigated and optimized...
January 3, 2017: Analytical and Bioanalytical Chemistry
Masateru Ono, Satoko Oda, Shin Yasuda, Tomoko Mineno, Masafumi Okawa, Junei Kinjo, Hiroyuki Miyashita, Hitoshi Yoshimitsu, Toshihiro Nohara, Kazumoto Miyahara
Four hexaglycosides of methyl 3S,12S-dihydroxyhexadecanoate (1-4) were provided after treatment of the crude convolvulin fraction from Rhizoma Jalapae Braziliensis (the root of Ipomoea operculata (GOMES) MART., Convolvulaceae) with indium(III) chloride in methanol. The structures of 1-4 were elucidated on the basis of spectroscopic and chemical methods. Their sugar moieties were partially acylated with organic acids including (3S,9R)-3,6:6,9-diepoxydecanoic (exogonic) acid, (E)-2-methylbut-2-enoic (tiglic) acid, and isovaleric acid...
2017: Chemical & Pharmaceutical Bulletin
J Ha, A Gallogly, J Cui, R Jennelle
PURPOSE: The aim of this work is to show that Field's metal can be used as a viable alternative material to lead-based low-melting temperature alloys (e.g., Cerrobend) for electron beam inserts and blocks. The goal is to eliminate exposure risks associated with lead and cadmium. METHODS: Field's metal (51% Indium, 32.5% Bismuth, 16.5% Tin) is a low-melting point eutectic alloy, and is proposed as a lead-free replacement for Cadmium-free alloy (52.5% Bismuth, 32% Lead, 15...
June 2016: Medical Physics
Xu Liu, Min Wei, Ensheng Xu, Haitang Yang, Wei Wei, Yuanjian Zhang, Songqin Liu
Telomerase has become one of the most typical tumor marker because it is closely related to cancers. In this paper, a simple label-free electrochemical detection of telomerase activity by using methylene blue (MB) as a G-quadruplex binding probe was proposed, avoiding commonly used complex label procedures, nano-probe synthesis, complicated electrode modification, probe immobilization or signal amplification. In the presence of telomerase substrate (TS) primer, the binding of MB on primer was weak. When repeats of (TTAGGG) were extended on the TS primer under the action of telomerase, they formed multiple G-quadruplexes with the help of K(+)...
December 24, 2016: Biosensors & Bioelectronics
Ya Chen, Lingen Zhang, Zhenming Xu
Recycling of waste liquid crystal display (LCD) panels is an urgent task with the rapid expanding LCD market. However, as important composition of LCD panels, the treatment of liquid crystal is seldom concerned for its low concentration. In present study, a stripping product enriched liquid crystal and indium is gained by mechanical stripping process, in which liquid crystal is enriched from 0.3wt.% to 53wt.% and indium is enriched from 0.02wt.% to 7.95wt.%. For the stripping product, liquid crystal should be removed before indium recovery because (a) liquid crystal will hinder indium recycling; (b) liquid crystal is hazardous waste...
December 19, 2016: Journal of Hazardous Materials
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