A self-powered triboelectric nanosensor (TENS) based on the contact-separation mode between a thin layer of poly(tetrafluoroethylene) (PTFE) with nanoparticle arrays and an aluminum film was fabricated for detection dopamine (DA) in alkaline condition. High selectivity sensitivity (detection limit 0.5 μM, linear range from 10 μM to 1 mM) have been achieved through strong interaction nonstick PTFE DA via its oxidative self-polymerization, output voltage current developed TENS can reach 116 V...

By harvesting the flowing kinetic energy of water using a rotating triboelectric nanogenerator (R‐TENG), this study demonstrates self‐powered wastewater treatment system that simultaneously removes rhodamine B (RhB) and copper ions through an advanced electrochemical unit. With electricity generated by R‐TENG, removal efficiency (RE) RhB can reach vicinity 100% within just 15 min when initial concentration is around 100 ppm at optimized conditions. The 97.3% after 3 h 150 condition....

A sensitive and in situ selective label-free DNA sensor based on a Schottky-contacted ZnO nanowire (NW) device has been developed utilized to detect the human immunodeficiency virus 1 gene this work. Piezotronic effect performance of is studied by measuring its output current under different compressive strains target complementary concentrations. By applying -0.59% strain NW-based sensor, relative response greatly enhanced 454%. theoretical model proposed explain observed behaviors sensor....

Triboelectric nanogenerators (TENGs) have shown exciting applications in mechanical energy harvesting and self‐powered sensing. Aiming at commercial applications, cost reduction simplification of TENG structures are great interest. In this work, a lightweight based on the integration polymer nanowires carbon sponge, which serves both as substrate an electrode, reported. Because low density sponge filmy nanowires, device exhibits total mass less than 0.1 g for volume 12.5 cm 3 it produces...

The need for cost‐effective and sustainable power supplies has spurred a growing interest in hybrid energy harvesting systems, the most elementary production process relies on intermittent solar power. Here, it is shown how ambient mechanical leads to water splitting photoelectrochemical (PEC) cell boosted by triboelectric nanogenerator (TENG). In this strategy, flexible TENG collects transforms into electric current, which boosts PEC via charged Li‐ion battery. Au nanoparticles are...

Cytochromes P450 (CYPs) enzymes are involved in catalyzing the metabolism of various endogenous and exogenous compounds. A rapid analysis drug reactions by CYPs is required because they can metabolize 95% current drugs development effective therapies. Here, we describe a study piezotronic-effect enhanced sensing utilizing single ZnO nanowire (ZnO NW) device. Owing to unique hydrophobic feature NW that provides desirable "microenvironment" for immobilization biomolecules, our device...

China has been facing serious water scarcity, and improving the supply utilization of resources from perspective resource endowment, economic development infrastructure is great significance toward sustainable development. In this work, two index systems for evaluating capacity (WSC) construction level (WICL) were constructed; efficiency (WRUE) was measured by applying a super slack-based measure model; ordinary least squares geographically weighted regression models used to explore...

This paper presents a novel sliding mode control to achieve high positioning accuracy for ball screw servo system. A two-degree-of-freedom (2-DOF) model with time-varying parameter uncertainties and disturbance is firstly built describe the first axial resonance nonlinear designed system better transient response of fast non-overshoot. The stability sliding-mode surface controller are verified based on Lyapunov function. frequency experiment result indicates that modelling accurate enough...

Purpose The purpose of this paper was to present a soft landing control strategy for biped robot avoid and absorb the impulsive reaction forces (which weakens walking stability) caused by impact between swing foot ground. Design/methodology/approach First, suitable trajectory is preplanned in direction. Second, are suppressed on-line modification based on extended time-domain passivity with admittance causality that has as inputs decomposed foot’s positions trim off outputs. Findings...

A new torso structure for a humanoid robot has been proposed. The structural characteristics and functions of human have considered to gain inspirations design purposes. proposed consists six revolute units divided into two basic categories connected in serial chain mechanism. shows more advantages compared traditional robots terms high degrees freedom (DOFs), stiffness, self-locking capabilities, as well easy-to-control features. Bionic optimization based on objective function method...

Purpose – The purpose of this paper is to present a dual-mode online optimization method (OOM) for trajectory tracking the redundant manipulators. This could be used resolve problem kinematics redundancy effectively when manipulator moves in limited space or its movements go through singular point. Design/methodology/approach In proposed method, physical limits torque level considered as inequality constraints optimal scheme. Besides, scheme developed yield feasible input each control period...

Purpose Walking on inclined ground is an important ability for humanoid robots. In general, conventional strategies walking slopes lack technical analysis in, first, the waist posture with respect to actual robot and, second, landing impact, which weakens stability. The purpose of this paper propose a generic method pattern generation considering these issues aim enabling walk dynamically slope. Design/methodology/approach First, virtual (VGM) proposed give continuous and intuitive...

The purpose of this paper was to extend a landing force control method on the flat terrain proposed by Y.D Kim etc. [1] absorb impulsive ground reaction for biped robot stable walking slope. Firstly, swing foot and are modeled as two three-ports network systems that connected respectively, exchange energy with each other. Secondly, impact is suppressed improve stability using extended time-domain passivity admittance causality has forces measured 6-axis Force/Torque sensor equipped in ankle...

Abstract Weight reduction is the eternal theme of aerospace optimization. In process weight reduction, main ways are material change, structural and processing method change. structure design, boundary load conditions more complicated, which restricts development optimization technology in field to some extent. At present, research object mainly large parts craft, small rarely involved. Therefore, design has important theoretical engineering significance. A complete proposed, performance...