Abstract With the incorporation of tailorable organic electronic materials as channel and storage materials, field‐effect transistor (OFET)‐based memory has become one most promising data technologies for hosting a variety emerging applications, such sensory memory, neuromorphic computing. Here, recent state‐of‐the‐art progresses in use small molecules OFET nonvolatile artificial synapses are comprehensively reviewed, focusing on characteristic features versatile functional roles (channel,...

Purpose This paper aims to optimize the charging schedule for battery electric buses (BEBs) minimize cost considering time-of-use electricity price. Design/methodology/approach The BEBs optimization problem is formulated as a mixed-integer linear programming model. objective total of BEB fleet. charge decision each at end trip be determined. Two types constraints are adopted ensure that meets operational requirements fleet and number piles can meet demand schedule. Findings conducts...

Abstract Three diazafluorene derivatives triphenylamine (TPA)(PDAF) n ( = 1, 2, 3) serving as small molecular elements are designed and synthesized via concentrated sulfuric acid mediated Friedel–Crafts reaction. With highly nonplanar topological configuration, TPA(PDAF) 3 shows weaker intermolecular interaction in the solid states thus exhibits single nanomolecular behavior, which is crucial for charge stored retained an organic field‐effect transistor (OFET) memory device. Furthermore,...

Atomically precise synthesis of three-dimensional boron-nitrogen (BN)-based helical structures constitutes an undeveloped field with challenges in synthetic chemistry. Herein, we synthesized and comprehensively characterized a new class molecular carbons, named benzo-extended [n]heli(aminoborane)s (

Two wide-band gap U-shaped polycyclic aromatic hydrocarbons with/without boron and nitrogen (BN-) doping (BN-1 C-1) were synthesized to tune the electronic features suit performance requirements for organic field-effect transistor memory (OFET-NVM). The chemical structures characterized by scanning tunneling microscopy single-crystal diffraction. Owing electron-donor effect of N high electron affinity B, BN-1-based OFET-NVM displays large ambipolar windows an enhanced charge storage density...

Abstract Rational molecular design for the organic nanocrystal morphology still remains a challenge due to structural diversity and complicated weak intermolecular interactions. In this work, typical attractor–repulsor molecule N,N ‐diphenyl‐4‐(9‐phenyl‐fluoren‐9‐yl) phenylamine (TPA‐PF) is designed explore general assembly strategy 2D nanocrystals. Via an interdigital lipid bilayer‐like (ILB) packing mode, large‐sized lamellar nanosheets are obtained with length:width:thickness ratio as...

Intramolecular alkyne aromatization is a powerful tool that enables the synthesis of nonplanar polycyclic aromatic hydrocarbons. Herein, an unexpected intramolecular via trifluoroacetic acid‐promoted cyclization described, in which two structural isomers, expanded [9]helicene ( 1 ) and π‐extended double [4]helicene 2 are obtained. A possible rearrangement mechanism proposed to account for formation . The geometric optoelectronic properties these molecular nanocarbons comprehensively...

The presence of ethanol as an impurity in industrial methanol significantly degrades the quality downstream products. Addressing challenge suppressing formation remains crucial synthesis methanol. In this context, we systematically characterized a series commercial catalysts and evaluated their catalytic performance for to elucidate relationship between catalyst structure selectivity. Our tests indicate that Cu–Zn–Al (NG), enhanced with ZrO2 promoter, can effectively inhibit formation,...

Metal–organic frameworks (MOFs) are useful for thin film-based device integration as they show high adsorption capacity selected gases. However, optimized of MOFs various platforms requires high-quality, well controlled film growth techniques that flexible, scalable, and manufacturable. For this reason, there is a critical need the ability to grow in form dense uniform films efficiently on wide range substrates. In work, copper benzene-1,3,5-tricarboxylate (Cu–BTC) MOF rapidly produced at...

Abstract River aggradation or incision at different spatial-temporal scales are governed by tectonics, climate change, and surface processes which all adjust the ratio of sediment load to transport capacity a channel. But how river responds differential tectonic extreme events in catchment is still poorly understood. Here, we address this issue reconstructing distribution, ages, sedimentary process fluvial terraces tectonically active area monsoonal environment headwaters Yangtze eastern...

A series of donor–acceptor ""-shaped gridarenes were synthesized with BT units as the crossbeam and thiophene π-bridge. The gridization functional effects on optoelectronic properties then studied experimentally computationally to provide a platform adjust energetics highest occupied molecular orbital/lowest unoccupied orbital levels. Finally, G-DTh-based two-terminal memristor indium tin oxide/G-DTh:TBAPF6/Al successfully realizes conventional learning processes, synaptic potentiation,...

A write-once–read-many-times (WORM) memory device based on conduction switching of a NiO thin film in metal–insulator–metal structure is fabricated flexible substrate. The can be switched from low-conductance state (unprogrammed state) to high-conductance (programmed with the formation conductive filament(s) layer. two states easily distinguished at very low reading voltage. For example, voltage 0.1 V, current ratio programmed 3 V for 1 <formula formulatype="inline"...

A two-dimensional (2D) magnetic field sensor is proposed in this paper. It contains two Wheatstone bridges composed of four sensitivity diodes(MSDs)with similar characteristics and loading resistances. In order to realize the axial symmetric distribution MSDs, MSDs with opposite sensitive directions were located along x −x axes, y −y axes. The experimental results indicate that when VDD = 5.0 V, sensitivities 2D can reach SxB 544 mV/T SyB 498 directions, respectively. Consequently, it...

Although the performance of organic semiconductor devices has reached standard commercial products after several decades development, stability semiconducting materials remains a key factor that severely impedes long-term operation electronics in practical applications. In this study, conjugated nanopolymer based on nanogrid was synthesized and systematically examined, it compared with two other types polyfluorenes terms stability, including thermal, spectral, morphological,...

挥发性有机物(VOCs)的排放对自然环境、人类健康产生了严重危害,吸附法和催化氧化法是治理VOCs的有效方法.沸石分子筛含有丰富的微孔,比表面积大,且含有较多的酸位点,具有一定的催化活性,十分适合作为催化剂载体材料,被广泛应用于分离、吸附及催化等领域.本文综述了不同沸石分子筛吸附去除及沸石基负载型催化剂催化氧化去除烷烃、芳香烃、醛类、酮类、酸类、酯类、醇类及氯代烃等VOCs的研究进展.分析表明,沸石吸附剂的孔道结构、硅铝比、表面物理化学性质,VOCs种类、极性、亲水性,对沸石分子筛吸附性能影响较大;沸石载体表面酸碱度,催化剂活性组分种类、分散性,VOCs种类等是影响负载型催化剂催化活性的重要因素;沸石载体和活性组分之间存在协同作用,赋予了负载型催化剂优异的催化活性.沸石负载贵金属催化剂对各类VOCs的催化氧化性能优于沸石负载金属氧化物催化剂,但贵金属价格昂贵,成本较高,通过合理设计多组分金属氧化物催化剂,可显著提高负载型催化剂的催化活性.此外,本文对沸石分子筛及其负载型催化剂去除VOCs的未来研究方向进行了展望.

Based on the nano-polysilicon thin film transistors (TFTs), a high-sensitivity pressure sensor was designed and fabricated in this paper. The sensing element is composed of Wheatstone bridge with four TFTs different positions square silicon diaphragm. Via taking channel resistors as piezoresistors, measurement to external can be realized according piezoresistive effects layer. Through adopting complementary metal oxide semiconductor (CMOS) technology micro-electromechanical system (MEMS)...

Abstract We investigate tunneling induced nonlinear absorption phenomena in a coupled quantum-dot system. Resonant causes constructive interference the that leads to an increase of more than order magnitude over maximum quantum dot system without tunneling. also narrowing linewidth peak sublinewidth level. Analytical expressions show enhanced is largely due fifth-order term. Competition between third- and nonlinearities anomalous dispersion total susceptibility.

Based on the asymmetric base region transistor, a pressure sensor with temperature compensation circuit is proposed in this paper. The sensitive structure of constructed by C-type silicon cup and Wheatstone bridge four piezoresistors (, , locating edge square membrane. chip was designed fabricated insulator (SOI) wafer micro electromechanical system (MEMS) technology bipolar transistor process. When supply voltage 5.0 V, corresponding coefficient sensitivity (TCS) for before after are −1862...

Superelectrophilic-initiated direct C–H functionalization of thiophenes at the β-position was developed. A series trans-stereospecific [2,1-a]-IF-thiophene-fused cyclic compounds (4) with saddle-shaped structure were prepared in 17–30% yields through a one-pot superelectrophilic Friedel–Crafts reaction dihydroindenofluorene thiophene derivatives. From crystal packing analyses 4a, its skeleton shows both strong intermolecular π–π stacking and C–H···π stacking. Furthermore, ring-dependent...

Summary of main observation and conclusion Organic semiconductor materials with low reorganization energy have various applications such as in organic light‐emitting diodes (OLEDs), field‐effect transistor (OFETs) solar cells (OSCs). In this work, we designed a new class gridspiroarenes (GS‐SFX GS‐SITF) #‐shaped structures, which novel crisscross geometrical structures compared to widely used spirocyclic arenes—SFX SITF. The structure electronic properties, adiabatic ionization potentials...