The direct oxidation of alcohols to esters with molecular oxygen is an attractive and crucial process for the synthesis fine chemicals. To date, heterogeneous catalyst systems that have been identified are based on noble metals or required addition base additives. Here, we show Co nanoparticles embedded in nitrogen-doped graphite catalyze aerobic at room temperature under base-free atmospheric conditions. Our Co@C-N catalytic system features a broad substrate scope aromatic aliphatic as well...

Although MOFs supporting noble metal nanoparticles (NPs) have been widely used in heterogeneous catalysis, they are still limited catalytic efficiency on a per-noble-metal-atom basis. Here we developed MOFs-templated strategy to non-noble @noble core–shell nanocatalysts, which could far surpass the traditional NPs properties, by using MOFs-derived as sacrificial templates reduce ions via galvanic replacement reaction. As model system, Co@Pd embedded N-doped carbon matrix (Co@Pd/NC) were...

A new and efficient hydrophilicity-directed approach (HDA) is developed to encapsulate large guest molecules beyond the aperture size limitation in nanospace of metal–organic frameworks (MOFs), as exemplified by self-assembly a polyhedral (MOP) M6L4 into MIL-101. This strategy based on different hydrophilicities between inner outer surfaces preformed MOF that may direct MOP pores using two-solvent system. Importantly, molecule larger than size, aggregation leaching are effectively prevented,...

A novel MOF-derived metallic cobalt-based catalyst for low-temperature CO oxidation was developed. This exhibited high catalytic activity even at a temperature as low −30 °C and improved tolerance of moisture compared to other Co-based materials.

Indium-tin-zinc-oxide (ITZO) as the channel layer grown by co-sputtering of ZnO target and ITO in bottom gate thin-film transistors (TFTs) is proposed this work. The microstructure optical properties ITZO thin films at different annealing temperatures were analyzed. impact various on TFT performance characteristics was systematically investigated well. It found that with temperature 300 °C exhibits excellent electrical a high saturation field-effect mobility (μ sat) 27.4 cm2 V-1 s-1, low...

A simple and label-free electrochemical aptasensor was developed for ultra-sensitive determination of chloramphenicol (CAP) based on a 2D transition metal carbides (MXene) loaded with gold nanoparticles (AuNPs). The embedded AuNPs not only inhibit the aggregation MXene sheets, but also improve quantity active sites electronic conductivity. aptamers (Apts) were able to immobilize MXene-AuNP modified electrode surface through Au-S interaction. Upon specifically binding CAP high affinity,...

In this article, we report continuous and large-area molybdenum disulfide (MoS2) growth on a SiO2/Si substrate by radio frequency magnetron sputtering (RFMS) combined with sulfurization. The MoS2 film was synthesized using two-step method. the first step, thin deposited (RF) at 400 °C different powers. Following, as-sputtered further subjected to sulfurization process 600 for 60 min. Sputtering is viable route few-layer controlling radio-frequency power. A relatively simple strategy...

To overcome the environment susceptibility of flexible amorphous InSnZnO (a-ITZO) thin-film transistors (TFTs), a surface passivation method utilizing n -octyltriethoxysilane (OTES) self-assembled monolayers (SAMs) is developed. The electrical characteristics developed indicate that device performance can be enhanced upon OTES passivation, exhibiting high mobility ( -.19.4 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> V...

Bottom-gate InSnZnO (ITZO) thin-film transistors (TFTs) with back channels modified by a self-assembled monolayer (SAM) as passivation layer are proposed. The SAMs prepared vapor-phase deposition method based on three types of triethoxysilane different alkyl chain lengths. Vapor-phase reactions much less sensitive to variations in humidity and reagent purity, more practical than the solution-phase method, generate reproducible results. After treated, densely packed highly hydrophobic...

Self-assembled monolayer (SAM) treatment of gate dielectrics is a standard process for manufacturing organic thin-film transistors (TFTs) to reduce interface trap density and surface energy. However, it rarely used oxide semiconductor-based TFTs because the SAMs may be damaged during process. To explore feasibility using SAM-treated dielectric improve performance TFTs, we study effects different SAM treatments layer on InSnZnO (ITZO) which can help guide selection SAMs. After with...

Network-on-Chips (NoCs) have emerged as a paradigm for designing scalable communication architecture System-on-Chips (SoCs). In NoC, one of the key challenges is to design most power-performance efficient NoC topology that satisfies application characteristics. this paper, we present three-stage synthesis approach solve problem. First, propose an algorithm [floor-planning integrated with cluster generation (FCG)] explore optimal clustering cores during floorplanning minimized link and switch...

Vertical channel InSnO (ITO)-stabilized ZnO thin-film transistors (TFTs) with a length of 300 nm were developed and fabricated. These TFT devices exhibited low off-state leakage current gate coming into the scale 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-14</sup> A. In addition, high on/off ratio was achieved, up to xmlns:xlink="http://www.w3.org/1999/xlink">7</sup> , drain voltage 0.01 V. The effects overlap area between source region...

In this study, the composite of Prussian blue-carboxylated MWCNTs/ZIF-67 (PB-MWCNTs-COOH/ZIF-67) was synthesized and used as modified electrode material to fabricate an electrochemical sensor for determination paracetamol (PAR). system, negatively charged MWCNTs-COOH support immobilization positively PB can effectively avoid agglomeration enhance stability, conductivity catalytic activity composite. ZIF-67 particles coating outside PB-MWCNTs-COOH promotes concentration PAR. Benefiting from...

We measure the electrical performance and stability of indium tin zinc oxide (ITZO) thin-film transistors (TFTs), respectively, covered with a passivation layer (PVL) aluminum (Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> ) or scandium (Sc prepared by pulsed laser deposition (PLD). The devices Sc PVL exhibit both satisfactory field effect mobility 16.4 cm <sup...

The localization of acoustic waves in defect-free two-dimensional quasiperiodic phononic crystals has been investigated by using an exact multiple-scattering method. Different types localized states have found eightfold, tenfold, and twelvefold quasicrystals without introducing any defect. coupled-resonator waveguides, based on these modes, designed, the resonant transmission properties waveguides demonstrated numerical simulations. It is anticipated that our findings can be potentially...

In this article, a 220 GHz frequency tripler using three-dimensional (3D) electromagnetic simulation is designed. Due to the characteristics of extremely short working wavelength and ultra-small circuit size terahertz multipliers, complicated parasitic effect cannot be ignored, which leads limited optimization space for matching in design components. precise 3D (EM) model planar Schottky barrier diode (SBD) established field-circuit co-simulation method proposed tripler. Compared with...