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https://www.readbyqxmd.com/read/28437996/high-contrast-switchability-of-vo-sub-2-sub-based-metamaterial-absorbers-with-ito-ground-plane
#1
Jitendra K Pradhan, S Anantha Ramakrishna, Bharathi Rajeswaran, Arun M Umarji, Venu Gopal Achanta, Amit K Agarwal, Amitava Ghosh
A metamaterial consisting of an array of gold micro-disks, separated from a ground plane of indium tin oxide (ITO) by a thin film of vanadium dioxide (VO<sub>2</sub>), behaves as a perfect absorber at infrared (IR) frequencies at room temperature. This metamaterial, which is transparent to visible light, can be switched to a highly reflecting state for IR light by heating the metamaterial to temperatures larger than the metal-insulator phase transition temperature 68°C of VO<sub>2</sub>...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437962/rapidly-reconfigurable-high-fidelity-optical-arbitrary-waveform-generation-in-heterogeneous-photonic-integrated-circuits
#2
Shaoqi Feng, Chuan Qin, Kuanping Shang, Shibnath Pathak, Weicheng Lai, Binbin Guan, Matthew Clements, Tiehui Su, Guangyao Liu, Hongbo Lu, Ryan P Scott, S J Ben Yoo
This paper demonstrates rapidly reconfigurable, high-fidelity optical arbitrary waveform generation (OAWG) in a heterogeneous photonic integrated circuit (PIC). The heterogeneous PIC combines advantages of high-speed indium phosphide (InP) modulators and low-loss, high-contrast silicon nitride (Si<sub>3</sub>N<sub>4</sub>) arrayed waveguide gratings (AWGs) so that high-fidelity optical waveform syntheses with rapid waveform updates are possible. The generated optical waveforms spanned a 160 GHz spectral bandwidth starting from an optical frequency comb consisting of eight comb lines separated by 20 GHz channel spacing...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437934/dual-channel-multilayer-coated-surface-plasmon-resonance-sensor-for-dual-refractive-index-range-measurements
#3
Mengdi Lu, Wei Peng, Qiang Liu, Yun Liu, Lixia Li, Yuzhang Liang, Jean-Francois Masson
We present a novel multilayer-coated surface plasmon resonance sensor for dual refractive index range measurements based on a capillary structure. The sensing elements include an internally coated Ag layer and an externally coated bilayer of Au with an overlayer of thin indium tin oxide (ITO). The internal Ag layer was sensitive to higher refractive index (RI) medium while the external Au/ITO layer was sensitive to lower refractive index medium. We evaluated the sensor performance by measuring RI changes in two channels, RI sensitivities were -1951 nm/RIU and 2496 nm/RIU, respectively...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437719/matrix-assisted-laser-desorption-ionization-mass-spectrometric-imaging-of-olanzapine-in-a-single-hair-using-esculetin-as-a-matrix
#4
Hang Wang, Ying Wang, Ge Wang, Lizhi Hong
Matrix-assisted laser desorption/ionization-mass spectrometric imaging (MALDI-MSI) for the analysis of intact hair is a powerful tool for monitoring changes in drug consumption. The embedding of a low drug concentration in the hydrophobic hair matrix makes it difficult to extract and detect, and requires an improved method to increase detection sensitivity. In this study, an MSI method using MALDI-Fourier transform ion cyclotron resonance was developed for direct identification and imaging of olanzapine in hair samples using the positive ion mode...
April 18, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28437614/engineering-highly-interconnected-neuronal-networks-on-nanowire-scaffolds
#5
Vini Gautam, Shagufta Naureen, Naeem Shahid, Qian Gao, Yi Wang, David R Nisbet, Chennupati Jagadish, Vincent R Daria
Identifying the specific role of physical guidance cues in the growth of neurons is crucial for understanding the fundamental biology of brain development and for designing scaffolds for tissue engineering. Here, we investigate the structural significance of nanoscale topographies as physical cues for neurite outgrowth and circuit formation by growing neurons on semiconductor nanowires. We monitored neurite growth using optical and scanning electron microscopy, and evaluated the spontaneous neuronal network activity using functional calcium imaging...
April 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28437251/solution-processible-moo-sub-x-sub-incorporated-graphene-anode-for-efficient-polymer-light-emitting-diodes
#6
Dongchan Lee, Donghyuk Kim, Yonghee Lee, Duk Young Jeon
Graphene has attracted great attention owing to its superb properties as an anode of organic or polymer light-emitting diodes (OLEDs or PLEDs). However, there are still barriers for graphene to replace existing indium tin oxide (ITO) due to relatively high sheet resistance and workfunction mismatch. In this study, PLEDs using molybdenum oxide (MoO<sub>x</sub>) nanoparticle-doped graphene are demonstrated on a plastic substrate to have a low sheet resistance and a high workfunction. Also, this work shows how the doping amount influence on electronic properties of graphene anode and the PLED performance...
April 24, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28435706/substitution-of-indium-for-chromium-in-tlin5-x-cr-x-se8-crystal-structure-of-tlin4-811-5-cr0-189-5-se8
#7
Robin Lefèvre, David Berthebaud, Franck Gascoin
The new thallium penta-(indium/chromium) octa-selenide, TlIn4.811(5)Cr0.189(5)Se8, has been synthesized by solid-state reaction. It crystallizes isotypically with TlIn5Se8 in the space group C2/m. Although the two Tl positions are disordered and only partially occupied, no Tl deficiency was observed. The insertion of chromium in the structure has been confirmed by EDS analysis. Chromium substitutes indium exclusively at one of three In sites, viz. at one of the positions with site symmetry 2/m (Wyckoff position 2a)...
April 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28435702/synthesis-and-crystal-structure-of-bis-%C3%AE-2-methyl-benzene-thiol-ato-%C3%AE%C2%BA-2-s-s-bis-meth-yl-2-methyl-benzene-thiol-ato-%C3%AE%C2%BAs-indium-iii
#8
Glen G Briand, Andreas Decken, Courtney M Dickie, Gregory MacNeil
The dinuclear title compound, [In2(CH3)2(C7H7S)4] or [Me(2-MeC6H4S)In-μ-(2-MeC6H4S)2InMe(2-MeC6H4S)], was prepared from the 1:2 reaction of Me3In and 2-MeC6H4SH in toluene. Its crystal structure exhibits a four-membered In2S2 ring core via bridging (2-MeC6H4S) groups. The dimeric units are further associated into a one-dimensional polymeric structure extending parallel to the a axis via inter-molecular In⋯S contacts. The In atoms are then in distorted trigonal-bipyramidal CS4 bonding environments.
April 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28432325/chemical-and-electrochemical-synthesis-of-platinum-black
#9
S E Stanca, F Hänschke, A Ihring, G Zieger, J Dellith, E Kessler, H-G Meyer
We present electrochemical and chemical synthesis of platinum black at room temperature in aqueous and non-aqueous media. X-ray analysis established the purity and crystalline nature. The electron micrographs indicate that the nanostructures consist of platinum crystals that interconnect to form porous assemblies. Additionally, the electron micrographs of the platinum black thin layer, which was electrochemically deposited on different metallic and semiconductive substrates (aluminium, platinum, silver, gold, tin-cooper alloy, indium-tin-oxide, stainless steel, and copper), indicate that the substrate influences its porous features but not its absorbance characteristics...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28430343/fabrication-and-characterization-of-indium-tin-oxide-films
#10
Shiuh-Chuan Her, Chun-Fu Chang
BACKGROUND: Transparent conducting oxide (TCO) films are of particular interest in the field of optoelectronics, due to the requirement for transparent electrodes in applications such as organic light-emitting diodes, solar cells and so on. The aim of this study was to obtain a better understanding of the effects of preparation temperature on indium tin oxide (ITO) films, to improve their performance for optoelectronic applications. METHODS: ITO films were deposited on glass substrate at different temperatures, using direct current (DC) magnetron sputtering...
April 5, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28427012/label-free-electrochemical-biosensing-of-small-molecule-inhibition-on-o-glcnac-glycosylation
#11
Yu Yang, Yuxin Gu, Bin Wan, Xiaomin Ren, Liang-Hong Guo
O-linked N-acetylglucosamine (O-GlcNAc) transferase (OGT) plays a critical role in modulating protein function in many cellular processes and human diseases such as Alzheimer's disease and type II diabetes, and has emerged as a promising new target. Specific inhibitors of OGT could be valuable tools to probe the biological functions of O-GlcNAcylation, but a lack of robust nonradiometric assay strategies to detect glycosylation, has impeded efforts to identify such compounds. Here we have developed a novel label-free electrochemical biosensor for the detection of peptide O-GlcNAcylation using protease-protection strategy and electrocatalytic oxidation of tyrosine mediated by osmium bipyridine as a signal reporter...
April 12, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28426069/gradual-modification-of-ito-particle-s-crystal-structure-and-optical-properties-by-pulsed-uv-laser-irradiation-in-a-free-liquid-jet
#12
Marcus Lau, Thomas Straube, A Vikas Aggarwal, Ulrich Hagemann, Bernardo de Oliveira Viestel, Nils Hartmann, Torsten Textor, Harald Lutz, Jochen S Gutmann, Stephan Barcikowski
Indium tin oxide (ITO) particle coatings are known for high transparency in the visible, good conductive properties and near-infrared absorption. These properties depend on ITO particle's stoichiometric composition, defects and size. Here we present a method to gradually change ITO particle's optical properties by a simple and controlled laser irradiation process. The defined irradiation process and controlled energy dose input allows one to engineer the absorption and transmission of coatings made from these particles...
April 20, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28422657/phased-array-ultrasound-system-for-planar-flow-mapping-in-liquid-metals
#13
Kevin Mader, Richard Nauber, Vladimir Galindo, Hannes Beyer, Lars Buttner, Sven Eckert, Jurgen Czarske
Controllable magnetic fields can be used to optimize flows in technical and industrial processes involving liquid metals in order to improve quality and yield. However, experimental studies in magnetohydrodynamics (MHD) often involve complex, turbulent flows and require planar, two-component velocity measurements through only one acoustical access. We present the phased array ultrasound Doppler velocimeter (PAUDV) as a modular research platform for flow mapping in liquid metals. It combines the pulse wave Doppler method with the phased array technique to adaptively focus the ultrasound beam...
April 12, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28422435/blue-organic-light-emitting-diodes-based-on-fluorene-bridged-quinazoline-and-quinoxaline-derivatives
#14
Dong Young Kim, Jisu Kang, Song Eun Lee, Young Kwan Kim, Seung Soo Yoon
Two blue emitters based on fluorene-bridged quinazoline and quinoxaline derivatives were prepared via the Suzuki reaction. Their photoluminescent properties were investigated. Furthermore, theoretical studies on these materials using the density functional theory calculation were conducted. To explore their electroluminescent properties, multilayered organic light-emitting diodes were fabricated with the following device structure: indium-tin-oxide (180 nm)/4,4'-bis(N-(1-naphthyl)-N-phenylamino)biphenyl (50 nm)/blue emitting materials (1 and 2) (30 nm)/bathophenanthroline (35 nm)/8-hydroxy-quinolinato lithium (2 nm)/Al (100 nm)...
April 19, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28422046/nanowelding-and-patterning-of-silver-nanowires-via-mask-free-atmospheric-cold-plasma-jet-scanning
#15
Lang Liu, Han-Yu Li, Dong Ye, Yao Yu, Lin Liu, Yue Wu
Silver nanowire (AgNW) thin film is a promising candidate to replace traditional indium tin oxide in optoelectronics applications. To date however, the widespread application of AgNW thin film is limited by the weak point contacts between individual AgNWs and the lack of facile patterning techniques. Here, we demonstrate a novel and facile method to not only nanoweld AgNW junctions but also pattern AgNW thin films via mask-free cold plasma-jet scanning in ambient conditions. After the plasma-jet nanowelding treatment, the morphology of AgNWs change substantially and the junctions are welded together...
April 19, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28421223/selectivity-of-quantum-dot-sensitized-zno-nanotube-arrays-for-improved-photocatalytic-activity
#16
Ge Gao, Qiaoyue Xi, Hua Zhou, Yongxia Zhao, Cunqi Wu, Lidan Wang, Pengran Guo, Jingwei Xu
In this work, PbS/ZnO, CdS/ZnO and CdSe/ZnO hierarchical heterostructures have been successfully synthesized by combining water bath and chemical bath deposition (CBD) methods on indium-doped tin oxide (ITO). Scanning electron microscopy (SEM) results show that quantum dots (QDs) certainly form on the pre-grown ZnO nanorod (NR) and nanotube (NT) arrays. The amount of QDs capped on ZnO could be regulated by varying the cycle times. The photocatalytic activity of the QD-sensitized ZnO is investigated by decomposition of methyl orange (MO) under irradiation, which show remarkable enhancement compared to bare ZnO...
April 19, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28420143/biotinylated-chlorin-and-its-zinc-and-indium-complexes-synthesis-and-in-vitro-biological-evaluation-for-photodynamic-therapy
#17
Meden F Isaac-Lam, Dewana M Hammonds
The synthesis and characterization of biotinylated chlorin photosensitizer and the corresponding zinc and indium complexes are described for potential applications in photodynamic therapy (PDT) for cancer. Phototoxicity of the biotin-chlorin conjugate and the metallated complexes was determined in colon carcinoma CT26 cell lines known to overexpress biotin (Vit B₇) receptors. Cell survival assay indicated that the biotinylated chlorin and indium complex showed increased cell growth inhibition than the zinc complex and the starting chlorin (methyl pheophorbide)...
April 15, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28420085/electrochemical-detection-of-dopamine-using-3d-porous-graphene-oxide-gold-nanoparticle-composites
#18
Sung-Sik Choo, Ee-Seul Kang, Inbeom Song, Donghyun Lee, Jeong-Woo Choi, Tae-Hyung Kim
The detection of dopamine in a highly sensitive and selective manner is crucial for the early diagnosis of a number of neurological diseases/disorders. Here, a report on a new platform for the electrochemical detection of dopamine with a considerable accuracy that comprises a 3D porous graphene oxide (pGO)/gold nanoparticle (GNP)/pGO composite-modified indium tin oxide (ITO) is presented. The pGO was first synthesized and purified by ultrasonication and centrifugation, and it was then further functionalized on the surface of a GNP-immobilized ITO electrode...
April 14, 2017: Sensors
https://www.readbyqxmd.com/read/28412098/supply-and-demand-of-some-critical-metals-and-present-status-of-their-recycling-in-weee
#19
REVIEW
Shengen Zhang, Yunji Ding, Bo Liu, Chein-Chi Chang
New development and technological innovations make electrical and electronic equipment (EEE) more functional by using an increasing number of metals, particularly the critical metals (e.g. rare and precious metals) with specialized properties. As millions of people in emerging economies adopt a modern lifestyle, the demand for critical metals is soaring. However, the increasing demand causes the crisis of their supply because of their simple deficiency in the Earth's crust or geopolitical constraints which might create political issues for their supply...
April 12, 2017: Waste Management
https://www.readbyqxmd.com/read/28411807/a-sensitive-and-disposable-indium-tin-oxide-based-electrochemical-immunosensor-for-label-free-detection-of-mage-1
#20
Burçak Demirbakan, Mustafa Kemal Sezgintürk
MAGE-1 (MAGE, for melanoma antigen), was identified by virtue of its processing and cell surface expression as a tumor-specific peptide bound to major histocompatibility complexes which was reactive with autolytic T cells. 3-Glycidoxypropyltrimethoxysilane (3-GOPS) is frequently employed for the preparation of dense heterometal hybrid polymers which are used, e.g., for hard coatings of organic polymers and contact lens materials in the optical industry. In this study, we have improved a new immunological biosensor with indium tin oxide (ITO)...
July 1, 2017: Talanta
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