Conjugation-induced rigidity in twisting molecules provides a new facile but effective avenue toward solution and solid dual-state efficient luminogens. While conjugation rigidifies the molecular conformations solution, structure prevents or alleviates detrimental close packing states, thus synergistically yielding high efficiencies both states.

Piezoelectric arterial pulse wave dynamics are traditionally considered to be similar those of typical blood pressure waves. However, achieving accurate continuous monitoring based on waves remains challenging, because the correlation between piezoelectric and their related is unclear. To address this, first elucidated via theoretical, simulation, experimental analysis these dynamics. Based this correlation, authors develop a wireless wearable system, with better portability than...

Conductive polymer hydrogels (CPHs) are widely employed in emerging flexible electronic devices because they possess both the electrical conductivity of conductors and mechanical properties hydrogels. However, poor compatibility between conductive polymers hydrogel matrix, as well swelling behavior humid environments, greatly compromises CPHs, limiting their applications wearable devices. Herein, a supramolecular strategy to develop strong tough CPH with excellent anti-swelling by...

Abstract Compared with traditional piezoelectric ultrasonic devices, optoacoustic devices have unique advantages such as a simple preparation process, anti-electromagnetic interference, and wireless long-distance power supply. However, current remain limited due to low damage threshold energy conversion efficiency, which seriously hinder their widespread applications. In this study, using self-healing polydimethylsiloxane (PDMS, Fe-Hpdca-PDMS) carbon nanotube composite, flexible patch is...

Incorporating soft actuation with yet durable textiles could effectively endow the latter active and flexible shape morphing motion like mollusks plants. However, creating highly programmable customizable robots based on faces a longstanding design manufacturing challenge. Here, we report methodology of encoded sewing constraints for efficiently constructing three-dimensional (3D) textile through simple 2D process. By encoding heterogeneous stretching properties into three spatial seams...

With the ultrahigh power density and fast charge–discharge capability, a dielectric capacitor is an important way to meet increase in demand for energy storage system such as pulsed systems (PPS). The BaTiO3-based considered one of candidates PPS due its high permittivity. However, with continuous miniaturization PPS, further increases thermal stability capacitors. Thus, this work describes new performance multilayer ceramic (MLCC) BaTiO3–xBi(Li0.5Nb0.5)O3 (BT–xBLN) (0.0 ≤ x 1.0) PPS. On...

We reported an initial clinical study of in vivo human thyroid by a photoacoustic/ultrasound handheld probe. Our dual-modality system is based on high-end ultrasound machine. Both healthy and cancerous thyroids were imaged non-invasively, we compared the photoacoustic imaging with color Doppler ultrasound. The results could reveal many blood vessels that not sensitive for demonstrated provide important complementary information traditional examination, which has great potential diagnosis.

In peripheral nerve injuries (PNIs) in which proximal axons do not regenerate quickly enough, significant chronic degeneration of Schwann cells (SCs) can occur at the distal stump injured and obstruct regeneration. Cell transplantation delay SCs, but transplanted fail to generate voluntary electrical impulses without downstream signal stimulation from central nervous system. this study, we combined cell transfer strategies investigate whether embryonic spinal cord could benefit...

This paper presents a fast rolling soft robot (RSR) driven by dielectric elastomer. Through novel structure design based on multisegment elastomer minimum energy structure, the appears to be fully flexible circular configuration with excellent ability of active deformation for its body controlled applied voltages. An equivalent pseudo-rigid-body model is developed provide an effective analysis and mechanism. The detailed fabrication process described, then prototype fabricated. resulting RSR...

Background: Myeloid-derived suppressor cells (MDSCs) promote immunosuppression in the tumor microenvironment, support growth and survival, may contribute to immunotherapy resistance. Recent studies showed that tumor-derived exosomes (TDEs) can induce MDSCs accumulation expansion, mechanisms of which are largely unknown. Methods: The morphologies sizes was observed by using a JEM-1400 transmission electron microscope. MicroRNA(miR)-107 ARG1, DICER1, PTEN, PI3K, AKT, mTOR, NF-kB mRNAs were...

This review focuses on the fundamentals and state-of-the-art label-free manipulation techniques based magneto-Archimedes effect.

Soft robots capable of flexible deformations and agile locomotion similar to biological systems are highly desirable for promising applications, including safe human-robot interactions biomedical engineering. Their achievable degree freedom motional deftness limited by the actuation modes controllable dimensions constituent soft actuators. Here, we report self-vectoring electromagnetic (SESRs) offer new operational dimensionality via actively instantly adjusting synthesizing interior vectors...

This letter presents a magnetic force intervention approach to enhance the performance of broadband compressive-mode vibration energy harvester. The promotes oscillator vibrate within desired work area. A stator drives away by employing repulsive force, while two stoppers (upper and lower magnets) limit unwanted large displacement drive it back toward stator. Numerical experimental results show that performances bistable harvester under low-frequency (<10 Hz) weak excitation can be...

The cellular piezoelectret generator (CPG) has drawn considerable attention as an emerging flexible energy harvester because of its advantages a simple structure, easy assembly, low cost, and eco‐friendliness. To facilitate practical applications, initial theoretical study CPGs is presented in this work, which the output characteristics can be optimized through appropriate choice parameters, including electret dielectric permittivity, device polarization process, external load. A good...

Pneumatic soft grippers made of silicone have been successfully applied in the industrial field grabbing fragile objects. But their inherent low stiffness often limits practical application scenarios required high or large load capacity. To expand grippers, a self-locking mechanism realized by an exoskeleton structure is proposed this work. The stiffness, carrying capacity, and stability soft–rigid can be enhanced premise maintaining sufficient compliance. resulted rigid–soft gripper has...

Highly sensitive, source-tracking acoustic sensing is essential for effective and natural human-machine interaction based on voice. It a known challenge to omnidirectionally track sound sources under hypersensitive rate with low noise interference using compact sensor. Here, we present unibody metamaterial spherical shell equidistant defected piezoelectric cavities, referred as the metasphere beamforming sensor (MBAS). demonstrates wave-confining capability self-noise, simultaneously...

Energy can be harvested from rotational motion for powering wireless autonomous electronic devices. In this paper, a novel magnetically coupled flextensional rotation energy harvester (MF-REH) is designed, with the advantages of high equivalent piezoelectric constant and reliability. The dynamical model developed to describe electromechanical transition. Effects design parameters on harvesting are analyzed. Simulations experiments carried out evaluate performances harvesters various...

In this paper, a compressive-mode wideband vibration energy harvester using combination of bistable and flextensional mechanisms is proposed. The structure consists cantilever with magnet fixed at its free end, actuator end. A theoretical model developed to characterize the harvester. Both simulations experiments are carried out validate design analysis results show that device can work in broadband, piezoelectric constant d31 be enlarged 134 times. experimental also indicate generate power...

Magnetic carbonyl iron powder (CIP) microcapsules were created by in situ polymerization using melamine resin as the wall material and CIP core material. They mixed with shellac self-repairing to prepare dual-functional wood coatings, effect of different amounts Dulux Waterborne primer on performance was investigated. The findings demonstrated that core-wall ratio had a significant impact characteristics microcapsules. microcapsule coating rate reached 57.7% when 0.65:1. maximum reflection...