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Infrared dielectric functions, phonon modes, and free-charge carrier properties of high-Al-content AlxGa1−xN alloys determined by mid infrared spectroscopic ellipsometry and optical Hall effect

S. Schöche、Tino Hofmann、Daniel Nilsson 等 9 位作者2017-05-24Journal of Applied Physics

We report on the analysis of a combined mid-infrared spectroscopic ellipsometry and mid-infrared optical Hall effect investigation of wurtzite structure c-plane oriented, crack-free, single crystalline, and high-Al-content AlxGa1−xN layers on 4H-SiC. For high-Al-content AlxGa1−xN, a two mode behavior is observed for b…

ZnO doping and propertiesGaN-based semiconductor devices and materialsSemiconductor materials and devices

Tuning Biocompatible Block Copolymer Micelles by Varying Solvent Composition: Core/Corona Structure and Solvent Uptake

Tyler J. Cooksey、Avantika Singh、Kim Mai Le 等 11 位作者2017-05-24Macromolecules

Block copolymer micelles enable the formation of widely tunable self-assembled structures in liquid phases, with applications ranging from drug delivery to personal care products to nanoreactors. In order to understand fundamental aspects of micelle assembly and dynamics, the structural properties and solvent uptake o…

Advanced Polymer Synthesis and CharacterizationPolymer Surface Interaction StudiesBlock Copolymer Self-Assembly

Nanobubbles as ultrasound contrast agent for facilitating small cell lung cancer imaging

Jinping Wang、Xiaolin Zhou、Jiping Yan 等 5 位作者2017-05-24Oncotarget

// Jin-Ping Wang 1,2 , Xiao-Lin Zhou 3 , Ji-Ping Yan 2 , Rong-Qin Zheng 4 and Wei Wang 1 1 Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Biotechnology, Shanxi University, Taiyuan, Shanxi, China 2 Department of Ultrasound, Shanxi Provincial People’s Hospital, Taiyua…

Nanoparticle-Based Drug DeliveryUltrasound and Hyperthermia ApplicationsUltrasound and Cavitation Phenomena

Hydrothermal Synthesis and Electrochemical Performance of Al-doped VO2(B) as Cathode Materials for Lithium-Ion Battery

Zhengguang Zou、Zhongliang Hou、Jilin Wang 等 6 位作者2017-05-24International Journal of Electrochemical Science

Al-doped VO 2 (B) nanobelts have been successfully synthesized via the hydrothermal method using V 2 O 5 , C 6 H 12 O 6 ·H 2 O and Al(NO 3 ) 3 ·9H 2 O as reactants. XRD, FESEM, EDS and XPS were introduced to characterize the phase, morphology, compositions and chemical state of the samples. Electrochemical properties…

Advancements in Battery MaterialsTransition Metal Oxide NanomaterialsAdvanced battery technologies research

Molecular design for silane‐terminated polyurethane applied to moisture‐curable pressure‐sensitive adhesive

Ye Yuan、Yanyan Zhang、Xiaowei Fu 等 8 位作者2017-05-24Journal of Applied Polymer Science

ABSTRACT Moisture‐curable silane‐terminated polyurethanes (SPUs) served as pressure‐sensitive adhesive (PSA) were synthesized based on different soft‐segment materials, silanes and silane end‐capping ratios. Depending on peel strength, tack, and holding power, the characteristic properties for PSA, a proper scheme for…

Advanced Polymer Synthesis and CharacterizationSynthesis and properties of polymersSilicone and Siloxane Chemistry

Enhanced ultrafast infrared spectroscopy using coupled nanoantenna arrays

Fumiya Kusa、Ikki Morichika、Akinobu Takegami 等 4 位作者2017-05-24Optics Express

times, substantially reducing the required pump energy from micro-joule to nano-joule level. The scheme is useful for characterizing structure and dynamics of minute-volume molecular samples, monolayers, and interfaces, as well as paves the way to nonlinear vibrational spectroscopy with compact light sources of oscill…

Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchSpectroscopy and Quantum Chemical Studies

Amperometric Detection of Gallic Acid Based on Electrochemically Activated Screen Printed Carbon Electrode

N. Raja、Thangavelu Kokulnathan、Shen‐Ming Chen 等 5 位作者2017-05-24International Journal of Electrochemical Science

A simple electrochemical sensor based on activated screen printed carbon electrode (ASPCE) was successfully fabricated for the selective and sensitive amperometric determination of gallic acid (GA). The activated screen printed carbon electrode (ASPCE) was fabricated by simple electrochemical technique and it was char…

Advanced biosensing and bioanalysis techniquesElectrochemical sensors and biosensorsAdvanced Nanomaterials in Catalysis

Imaging of nuclear Overhauser enhancement at 7 and 3 T

Yuanyu Shen、Gang Xiao、Zhiwei Shen 等 9 位作者2017-05-24NMR in Biomedicine

Nuclear Overhauser enhancement (NOE) is a type of magnetization transfer using cross-relaxation. It originates from mobile macromolecules, which may have relevance to the evaluation of tumor features. We studied the value of NOE imaging at 7 and 3 T and suggest a utility for diagnosing human brain tumors. Two types of…

Advanced MRI Techniques and ApplicationsLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies

Structural insights into the elevator-like mechanism of the sodium/citrate symporter CitS

Ji Won Kim、Subin Kim、Songwon Kim 等 6 位作者2017-05-24Scientific Reports

The sodium-dependent citrate transporter of Klebsiella pneumoniae (KpCitS) belongs to the 2-hydroxycarboxylate transporter (2-HCT) family and allows the cell to use citrate as sole carbon and energy source in anaerobic conditions. Here we present crystal structures of KpCitS in citrate-bound outward-facing, citrate-bo…

Protein Structure and DynamicsBacterial Genetics and BiotechnologyEnzyme Structure and Function

A pathway for protective quenching in antenna proteins of Photosystem II

Sotiris Papadatos、Antreas C. Charalambous、Vangelis Daskalakis2017-05-24Scientific Reports

Photosynthesis is common in nature, converting sunlight energy into proton motive force and reducing power. The increased spectral range absorption of light exerted by pigments (i.e. chlorophylls, Chls) within Light Harvesting Complexes (LHCs) proves an important advantage under low light conditions. However, in the e…

Photosynthetic Processes and MechanismsEnzyme Structure and FunctionPhotoreceptor and optogenetics research

Eumelanin and pheomelanin are predominant pigments in bumblebee (Apidae:Bombus) pubescence

Carlo Polidori、Alberto Jorge、Concepción Ornosa2017-05-24PeerJ

Background Bumblebees (Hymenoptera: Apidae:Bombus) are well known for their important inter- and intra-specific variation in hair (or pubescence) color patterns, but the chemical nature of the pigments associated with these patterns is not fully understood. For example, though melanization is believed to provide darke…

Animal Behavior and Reproductionmelanin and skin pigmentationSilk-based biomaterials and applications

Flexible Lactate and Glucose Sensors Using Electrolyte-Gated Carbon Nanotube Field Effect Transistor for Non-Invasive Real-Time Monitoring

Saumya Joshi、Vijay Deep Bhatt、Hao Wu 等 5 位作者2017-05-24IEEE Sensors Journal

We demonstrate flexible, low cost glucose and lactate sensors using novel enzyme immobilization scheme, primarily aimed toward wearable devices. The intrinsic chemical nature of polyimide films is harnessed to immobilize the enzyme on the polyimide substrate using a dicarboxylic acid. Sensors are fabricated using carb…

Electrochemical sensors and biosensorsConducting polymers and applicationsAnalytical Chemistry and Sensors

STUDY ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF 304 STAINLESS STEEL JOINTS BY TIG–MIG HYBRID WELDING

Emmanuel Ogundimu、Esther T. Akinlabi、Mutiu F. Erinosho2017-05-24Surface Review and Letters

Stainless steel is a family of Fe-based alloys having excellent resistance to corrosion and as such has been used imperatively for kitchen utensils, transportation, building constructions and much more. This paper presents the work conducted on the material characterizations of a tungsten inert gas (TIG)–metal inert g…

Microstructure and Mechanical Properties of SteelsHydrogen embrittlement and corrosion behaviors in metalsWelding Techniques and Residual Stresses

Ensemble simulations of inertial confinement fusion implosions

R. Nora、Jayson Luc Peterson、B. K. Spears 等 5 位作者2017-05-24Statistical Analysis and Data Mining The ASA Data Science Journal

The achievement of inertial confinement fusion ignition on the National Ignition Facility relies on the collection and interpretation of a limited (and expensive) set of experimental data. These data are therefore supplemented with state‐of‐the‐art multidimensional radiation‐hydrodynamic simulations to provide a bette…

Laser-Plasma Interactions and DiagnosticsFusion materials and technologiesNuclear Physics and Applications

Properties and Uses of Microemulsions

D. Nedra Karunaratne、Geethi K. Pamunuwa、Udayana Ranatunga2017-05-24InTech eBooks

Properties and Uses of Microemulsions is intended to provide the reader with some important applications and features of these systems. The intricate composition of microemulsions has made them applicable in many areas such as cosmetics, pharmaceuticals, food, agriculture, oil recovery, chemical synthesis of nanoparti…

Nanoparticle-Based Drug DeliverySurfactants and Colloidal Systems

Correlating the para-Substituent Effects on Ru(II)-Polypyridine Photophysical Properties and on the Corresponding Hybrid P450 BM3 Enzymes Photocatalytic Activity

Hadil Shalan、Alexander Colbert、Thanh-Truc Nguyen 等 5 位作者2017-05-24Inorganic Chemistry

Ru(II)-diimine complexes covalently attached near the heme active site of P450 BM3 enzymes have been used to rapidly inject electrons and drive selective C–H functionalization upon visible light irradiation. Herein, we have generated a series of hybrid P450 BM3 enzymes containing a photosensitizer of general formula […

Advanced Photocatalysis TechniquesCatalytic C–H Functionalization MethodsAdvanced Nanomaterials in Catalysis

Intrinsically Hierarchical Nanoporous Polymers via Polymerization-Induced Microphase Separation

Michael B. Larsen、J. David Van Horn、Fei Wu 等 4 位作者2017-05-24Macromolecules

The synthesis of microporous polymers generally requires postpolymerization modification via hyper-cross-linking to trap the polymeric network in a state with high void volume. An alternative approach utilizes rigid, sterically demanding monomers to inhibit efficient packing, thus leading to a high degree of free volu…

Membrane Separation and Gas TransportCovalent Organic Framework ApplicationsMuon and positron interactions and applications

Modeling the Effect of Polymer Chain Stiffness on the Behavior of Polymer Nanocomposites

J. Javier Burgos-Mármol、Óscar Álvarez-Machancoses、Alessandro Patti2017-05-24The Journal of Physical Chemistry B

Due to their central role in industrial formulations spanning from food packaging to smart coatings, polymer nanocomposites have been the object of remarkable attention over the last two decades. Incorporating nanoparticles (NPs) into a polymer matrix modifies the conformation and mobility of the polymer chains at the…

Surfactants and Colloidal SystemsRheology and Fluid Dynamics StudiesBlock Copolymer Self-Assembly

Functionalized Polyethyleneimine-gold Nanoparticles-Porphyrin Nanocomposite for Electrochemical Glucose Biosensing

Shumei Gu、Kefeng Ma、Jinming Kong 等 7 位作者2017-05-24International Journal of Electrochemical Science

In this work, a novel polyethyleneimine-gold nanoparticles-porphyrin (PEI-AuNPs-Fe III MPIX) nanocomposite was constructed by a simple method to achieve excellent electrochemical properties. Firstly, AuNPs were reduced and stabilized by PEI, and then Fe III MPIX was conjugated to this scaffold through amidation reacti…

Advanced biosensing and bioanalysis techniquesElectrochemical sensors and biosensorsAdvanced Nanomaterials in Catalysis

Optical compensation for the perturbed three mirror anastigmatic telescope based on nodal aberration theory

Xiaobin Zhang、Shuyan Xu、Hongcai Ma 等 4 位作者2017-05-24Optics Express

In this paper, the Zernike coefficient is analytically expressed as the product of the dependence of aberration field decenter vectors (related with perturbations) and the dependence of fields of view (FOVs), on the frame work of nodal aberration theory (NAT). By expanding and analyzing this expression, an alignment s…

Adaptive optics and wavefront sensingAdvanced optical system designOptical Coatings and Gratings