The tunability of the chemical composition ionic liquids (ILs), achieved by pairing various organic cations with numerous anions, allows for fine control their physicochemical properties and has been widely used adjustment IL solvent characteristics. Exploitation structural modularity coupled modification cation or anion to incorporate polymerizable groups is now an active area research, resulting in development polymeric (poly(IL)s). emergence poly(IL)s as functional materials areas polymer...

An ultrahigh capacity supercapacitor is fabricated using a nano-layered MXene as an active electrode material, and Ni-foil used current collector. The high-quality Ti3C2Tx obtained from supernatant during etching washing processes improves the specific capacitance significantly. As another strategy, surface of engineered by coating chemical vapor deposition-grown graphene. graphene grown directly on collector, forming structure Ti3C2Tx/graphene/Ni. passivation collectors has high impact...

Abstract Even though atomically thin 2D semiconductors have shown great potential for next‐generation electronics, the low carrier mobility caused by poor metal–semiconductor contacts and inherently high density of impurity scatterings remains a critical issue. Herein, high‐mobility field‐effect transistors (FETs) introducing few‐layer PdSe 2 flakes as channels is achieved, via directly depositing semimetal antimony (Sb) drain–source electrodes. The formation clean defect‐free van der Waals...

Electrochemical reduction of CO 2 to chemical fuels with a transition metal-based single atom catalyst (SAC) offers promising strategy reduce high catalytic selectivity.

The characterization of pore networks is extremely important in understanding transport and storage phenomena unconventional gas oil reservoir rocks. An ultrasmall-angle X-ray scattering (USAXS) measurement has been performed on Silurian black shales from the Baltic Basin, Poland, a wide range depths along burial diagenetic sequence. This study provides insight into nature structure, including size distribution, total porosity, fractal dimensions Samples were measured both their air-dried...

X-ray absorption near-edge structure (XANES) is commonly used to probe the oxidation state of metal-containing nanomaterials; however, as particle size in material drops below a few nanometers, it becomes important consider inherent effects on electronic materials. In this paper, we analyze series size-selected Ptn/SiO2 samples, using photoelectron spectroscopy (XPS), low energy ion scattering, grazing-incidence small-angle and XANES. The morphology are characterized both as-deposited UHV,...

Glucose oxidase (GOx) adsorbed on an ionic liquid-derived polymer containing internally organized columns of Au nanoparticles exhibits direct electron transfer and bioelectrocatalytic properties towards the oxidation glucose. The cationic poly(ionic liquid) provides ideal substrate for electrostatic immobilization GOx. encapsulated serve to both promote with recessed enzyme redox centers impart electronic conduction composite, allowing it function as electrode electrochemical detection.

Color control without severe photoluminescence (PL) quenching is one of main issues in white light emission technology. White was successfully achieved using phosphor layers made electrospun quantum dot (QD) embedded polymer fibers as color down-conversion blue light-emitting diodes (LEDs). Down-conversion from to longer wavelength characterized by fluorescence microscopy and spectroscopy. Using orange QD-embedded fiber-based layers, a broad spectrum white-light demonstrated with the CIE...

Abstract Recently, 2D materials have been intensively investigated for their novel nanoelectronic applications; among these materials, tungsten diselenide (WSe 2 ) is attracting substantial research interest due to its high mobility, sizable bandgap, and ambipolar characteristics. However, Fermi‐level pinning (FLP) at the metal–semiconductor contact a critical issue preventing further integration of WSe complementary metal–oxide–semiconductor (CMOS) technology. In this study, facile doping...

The high contact resistance (Rc) arising at the interface between a metal and two-dimensional (2D) material presents significant challenge to carrier transport in semiconductor devices based on 2D materials. van der Waals gap metal-induced states formed give rise an uncontrollable Schottky barrier, resulting Rc. In this study, we report achievement of very low Rc ohmic behavior molybdenum disulfide (MoS2) field-effect transistors through implementation edge contacts using semimetallic...

Squalene synthase (SQS) is a bifunctional enzyme that catalyzes the condensation of two molecules farnesyl diphosphate (FPP) to give presqualene (PSPP) and subsequent rearrangement PSPP squalene. These reactions constitute first pathway-specific steps in hopane biosynthesis Bacteria sterol Eukarya. The genes encoding SQS were isolated from hopane-producing bacteria Thermosynechococcus elongatus BP-1, Bradyrhizobium japonicum, Zymomonas mobilis cloned into an Escherichia coli expression...

WSe₂ FET oxidized by plasma. Channel resistance decreases exponentially with increasing work function, approaching thermal limit.

Abstract 2D molybdenum ditelluride (MoTe 2 ) has recently received significant attention due to its unique phase transition and ambipolar behavior as well thickness‐dependent bandgap. The electrical breakdown of various thickness MoTe field‐effect transistors observed under high electric fields are addressed. Interestingly, the exhibits from a semiconducting 2H metallic 1T′ almost simultaneously with breakdown, this is confirmed by Raman peak 1T′‐MoTe at 125 cm −1 . Using mapping results...

Isopentenyl diphosphate isomerase (IDI) catalyzes the interconversion of isopentenyl (IPP) and dimethylallyl (DMAPP), basic building blocks isoprenoid molecules. Two structurally unrelated classes IDI are known. Type I IPP (IDI-1) utilizes a divalent metal in protonation-deprotonation reaction; whereas, type II enzyme (IDI-2) requires reduced flavin. Epoxy, diene, fluorinated substrate analogues, irreversible inhibitors IDI-1, were analyzed as mechanistic probes for IDI-2....

Isopentenyl diphosphate isomerase (IDI) catalyzes the essential conversion of isopentenyl (IPP) to dimethylallyl (DMAPP) in mevalonate entry into isoprenoid biosynthetic pathway. Two convergently evolved forms IDI are known. Type I IDI, which is found Eukarya and many Bacteria, isomerization IPP DMAPP by a protonation−deprotonation mechanism. The enzyme requires two divalent metal ions for activity. An X-ray structure type from crystals soaked with (N,N-dimethylamino)-1-ethyl (NIPP), potent...

Abstract A great challenge is presented when metals have contact with a 2D semiconducting material because the resistances ( R c ) induced at metal‐graphene interfaces hinder performances of devices, and therefore low resistance Ohmic contacts need to be developed achieve unique high performance devices. This study demonstrates that edge‐contacted graphene devices multiple stacked hetero‐structures hexagonal boron nitride (hBN) exhibit superior in carrier transport across channel regions,...

The transport properties of self-supporting Au nanoparticle–ionic liquid-derived polymer composites were characterized. Topographic AFM images confirm the perforated lamellar composite architecture determined by small-angle X-ray scattering (SAXS) and further show that in situ synthesized nanoparticles are localized within hydrophilic (water) domains structure. At low nanoparticle content, reveal incomplete packing spherical particles (i.e., voids) these columns. confinement organization...

The rate of dissolution, the native film on electrochemically polished, single-crystal [(100), (110), and (111) orientations] polycrystalline Al electrodes is reported. Measurements were made in solutions containing between 0 75 mM NaCl. determined by analysis voltammetric curves recorded during growth, using a model which oxide growth governed high-field transport ions within film, while dissolution at oxide/electrolyte interface occurs potential-independent mechanism. observed to be...

Thermal free radical polymerization of a self-assembled, bifunctional imidazolium-based ionic liquid (IL) monomer bearing both vinyl and thienyl groups is reported. FT-IR spectroscopy proves that the occurs through groups. The polymer resistant to swelling in water common organic solvents. as-synthesized can be readily chemically doped de-doped. Small-angle X-ray scattering studies indicate dried adopts weakly ordered lamellar structure. p-doped, ethanol-solvated undergoes structural...

Abstract It becomes clear that, in two-dimensional (2D) materials-based devices, sheet resistances underneath electrodes change due to a metallic contact, leading substantial errors determining transfer length. Thus, the extraction of length and corresponding contact resistivity must be revisited assess performance 2D devices. In this study, we present three different approaches WSe 2 field effect transistors for first time by theoretical analysis using resistive network model as well...

Abstract 2D transition metal dichalcogenides (TMDCs) are anticipated to be the ones of future nano‐sized photodevices due their electronic and optoelectronic properties. They have shown remarkable performances as photodetectors from being fabricated into heterostructures with p–n junction. An oxygen plasma‐doped WSe 2 /pristine MoS ‐based photodetector high responsivity broad detection spectrum ranging visible near‐infrared (NIR) region is reported. The plasma treatment forms a WO x layer on...

Abstract The endothermic cracking and dehydrogenation of n ‐dodecane is investigated over well‐defined nanometer size platinum catalysts supported on SiO 2 to study the particle effects in catalytic reaction, with simultaneous situ monitoring oxidation state working by SAXS (small angle X‐ray scattering) XAS (X‐ray absorption spectroscopy). selectivity toward olefins products was found dominant 1 nm catalysts, whereas paraffins are catalysts. This reveals a strong correlation between...