Abstract All‐polymer solar cells have garnered particular attention thanks to their superior thermal, photo, and mechanical stabilities for large‐scale manufacturing, yet the performance enhancement remains largely restrained by inherent morphological challenges of bulk‐heterojunction active layer. Herein, a 3D Y‐branched polymerized small‐molecule acceptor named PYBF , characteristic high molecular weight glass transition temperature, is designed synthesized precisely linking C 3h...

Silicon monoxide (SiO) is considered as one of the most promising anode material candidates for next-generation high-energy-density lithium ion batteries (LIBs) due to its high specific capacity and relatively lower volume expansion than that Si. However, a large number irreversible products are formed during first charging discharging process, resulting in low initial Coulombic efficiency (ICE) SiO. Herein, we report an economical convenient method increase ICE SiO without sacrificing by...

Full-field deformation can support the adjustment of morphing aircraft' shape which has significant impacts on aerodynamic performance. A perception system (DPS) combining an intelligent flexible sensing film (iFlexSense) and a displacement reconstruction algorithm is proposed. The iFlexSense features ultra-thin, low elastic modulus, geometric conformality. strain observation been realized simply by pasting to inner surface wing skin. single-side inverse finite element method (ssiFEM),...

This paper presents the design and analysis of a passive body weight (BW)-support lower extremity exoskeleton (LEE) with compliant joints to relieve compressive load in knee. The biojoint-like mechanical knee decouples human gait into two phases, stance swing, by dual snap fit. joint transfers BW ground phases is free leg swing phases. Along dynamic model biomechanical model, unmeasurable internal forces are simulated. concept feasibility models LEE have been experimentally validated...

In all-polymer solar cells (all-PSCs), there remains such a dilemma that obtains good miscibility and crystallinity simultaneously. Herein new family of Y-shape polymer acceptor, namely PYTT is developed, which copolymerized from Y6 benzotrithiophene units in three-way directions. Benefiting its high-density end-chains extended π-conjugation thanks to highly-branched 3D architecture, displays better organic solubility despite much higher molecular weights, larger crystallinity, tighter...

Abstract Laser‐induced graphene sensors have attracted considerable interest in various fields; however, the low sensitivity and conformability limit their further applications measuring soft, large deformable structures. Here, an innovative method of interface ablation is presented to convert interfacial polyimide into by nanosecond ultraviolet laser (308 nm). Significantly different from traditional surface ablation, demonstrates its unique capacity produce high‐quality with limited depth,...

Abstract Organic solar cells (OSCs) consisting of an ultralow‐bandgap nonfullerene acceptor (NFA) with optical absorption edge that extends to the near‐infrared (NIR) region are vital interest semitransparent and tandem devices. However, huge energy‐loss related inefficient charge dissociation hinders their further development. The critical issues separation as exemplified in NIR‐NFA OSCs based on paradigm blend PTB7–Th donor (D) IEICO–4F (A) revealed here. These studies corroborate...

π-Conjugated donor (D)-acceptor (A) copolymers have been extensively studied as organic photovoltaic (OPV) donors yet remain largely unexplored in thermoelectrics (OTEs) despite their outstanding mechanical bendability, solution processability and flexible molecular design. Importantly, they feature high Seebeck coefficient (S) that are desirable room-temperature wearable application scenarios under small temperature gradients. In this work, the authors systematically investigated a series...

This article presents a binocular visuotactile sensor (BVTS) and its model for reconstructing the 3-D deformation due to mechanical contact on elastomer surface. The explicitly accounts refraction effects of depth map reconstructed from imaged markers. To help gain physical insights into reconstruction experimentally analyze effectiveness model-based BVTS, prototype BVTS has been developed experimental investigation. refractive indexes elastomer, acrylics, their combination are determined...

This paper presents an efficient method, which reconstructs the temperature field around tool/chip interface from infrared (IR) thermal images, for online monitoring internal peak of cutting tool. The tool is divided into two regions; namely, a far solving heat-transfer coefficient between and ambient temperature, near where artificial neural network (ANN) trained to account unknown heat variations at frictional contact interface. Methods extract physics-based feature points IR image as ANN...

An efficient adsorbent (CS/prGO/DM composites) was successfully synthesized. It exhibited high removal ability towards tea interferents. A colorimetric sensing platform based on Au NPs for quantitative detection of pesticides in developed.

This paper investigates the parametric effects, which include material properties, hook shape, and shear deformation, on force/deflection relationship governing assembly/disassembly processes of a snap-fit for developing embedded algebraic solutions to achieve realistic force feedback through haptic device. For this purpose, an model, isolates individual factors that contribute cantilever deflection, has been derived examining assumptions commonly made simplify models design optimization...

Purpose The purpose of this paper is to shed light on the effect high‐level human capital investment, using tertiary education as proxy, urban‐rural income gap in China. Design/methodology/approach Using a panel dataset covering 28 provinces China over period from 1988 2007, employs Hansen's method and two‐step GMM‐SYS estimator estimate threshold regression model dynamic fixed‐effect model, respectively. Findings found be related investment an inverted U‐shaped pattern with respect economic...

This paper presents a new method that combines physics-based model and finite-element (FE) based digital image correlation (DIC) with an interfacial continuity condition for simultaneous deformation measurements of strain field material mechanical properties. The dual-domain global DIC incorporates model-based kernel offers useful physical insights into the complex constrains solutions to iterative minimization criterion, which leads faster convergence. Unlike local subset-based FE-based...

In metal cutting, a good understanding of both the elastic-plastic deformation and mechanical behavior workpiece material in primary shear band (PSB) is essential to optimize machining process ensure product quality, particularly when hard-to-cut materials (such as Titanium alloys) with low thermal conductivity that gives rise stress localization near tool-chip interface. This article presents an extended digital image correlation (DIC) method obtain highly intensive localized strain fields...

In metal cutting, the ability to model its tool temperature distribution is highly desirable, as it provides an effective means monitor and workpiece conditions, particularly when machining hard-to-machine materials that have a low heat conductivity. Because of complex generation in microscale tool-chip interface, difficulty infer well-known problem. context dry lathe turning, this paper presents hybrid method considers both macroscale transfer mechanics reconstruct 3-D field from...