Abstract: The present disclosure provides a high-temperature resistant nano-copper produced by laser direct writing, a preparation method and an application thereof. The high-temperature resistant nano-copper exhibits excellent oxidation resistance, thermal stability and superior conductivity. In this disclosure, the preparation is simple, and the nano-copper oxide ink can be stored for extended periods without being affected by oxidation. It is suitable for various manufacturing processes including printing, coating, and other similar methods. Moreover, based on laser direct writing, the processing efficiency is high, enabling the one-step integration of multi-performance of the high-temperature resistant nano-copper. The high-temperature resistant nano-copper described in the present disclosure can be used as an interconnection circuit in an integrated sensor system based on all-laser in-situ direct writing, and can be widely applied in fields of aerospace, automobile, electronics, etc.

Abstract: An integrated system for textile hybrid electronics via laser hybrid manufacturing includes surface mounted devices (SMDs), laser-induced flexible sensors, a textile substrate, conductive textile traces and physiological electrodes, and vertical interconnect accesses (VIAs). By leveraging a material modification capability of a laser, patterned sensors can be prepared directly on the textile substrate. A precision cutting capability of a laser is utilized to create patterned flexible electrodes and interconnect wires. Furthermore, highly stable VIAs are formed by infiltrating the fabric's intrinsic structure with conductive composites. By integrating the aforementioned preparation techniques, a double-layer fabric circuit board can be realized on various daily-use and specialized textiles. Subsequently, the SMDs are soldered onto the board to form an integrated system for textile hybrid electronics.

Abstract: A textile electronic system for integrating muscle fatigue detection and treatment includes following components that are integrated on a textile substrate: conductive textile wires, physiological electrodes, vertical interconnect accesses (VIAs) and a surface-mounted device (SMD). The conductive textile wires are arranged on two sides of the textile substrate and communicated with each other through the VIAs, and an integrally formed circuit includes an electrode array and a signal conditioning circuit. The electrode array is configured for detecting an electromyography (EMG) signal and for applying electrical muscle stimulation (EMS), and the signal conditioning circuit is configured for EMG signal amplification, EMS waveform conditioning and overall timing logic control, and has functions of safety isolation and EMS waveform detection. The present disclosure can highly integrate components and devices on a single piece of textile through process design, and realize EMG signal collection and applying EMS.

Abstract: A bioelectronic surgical suture for monitoring suture tension includes a conductive material made of electropositive material, and a sleeve made of electronegative material. The sleeve is a hollow capillary, the conductive material is arranged in the sleeve through infusion, and is processed by a first laser scanning operation after infusion. An outer wall of the sleeve has a micro-nano structure manufactured by a second laser scanning operation.

Abstract: A long-lasting hydrogel for use against drug-resistant bacteria, and a preparation method and use thereof are provided. In the present disclosure, polyvinyl alcohol (PVA) is mainly adopted as a matrix, and phytic acid and honey including glucose and fructose are added to modify the PVA to obtain the hydrogel. During preparation of the antimicrobial hydrogel, no toxic chemical crosslinking agent or initiator is added, and the antimicrobial hydrogel is mainly obtained by crosslinking PVA, phytic acid, and monosaccharides through ester bonds, hydrogen bonds, and electrostatic adsorption. In addition, the hydrogel obtained by adding phytic acid and honey to the PVA matrix exhibits a significant long-lasting antimicrobial effect for Staphylococcus aureus (S. aureus), drug-resistant S. aureus, and Pseudomonas aeruginosa (P. aeruginosa), and the antimicrobial effect can last for about 3 months.

Abstract: The present disclosure provides a freezing transfer method for porous carbon electrodes based on subzero temperature and applications in sensors, the method including: forming porous carbon electrodes to be transferred on a substrate, introducing a hydrogel material between the porous carbon electrodes to be transferred and a flexible/elastomeric material, expanding the hydrogel material to form a structural coupling with porous carbon, removing the substrate to realize peeling, and completing the transfer of the porous carbon electrodes. According to the present disclosure, fast and complete peeling of the porous carbon electrodes can be realized, a thinner flexible-elastomeric substrate is required, and a composite electrode formed has superior electroconductive stretchability, which helps to realize manufacturing of conformal flexible electronics such as ultrathin flexible or stretchable sensors.

Abstract: The present disclosure provides a high-temperature resistant nano-copper produced by laser direct writing, a preparation method and an application thereof. The high-temperature resistant nano-copper exhibits excellent oxidation resistance, thermal stability and superior conductivity. In this disclosure, the preparation is simple, and the nano-copper oxide ink can be stored for extended periods without being affected by oxidation. It is suitable for various manufacturing processes including printing, coating, and other similar methods. Moreover, based on laser direct writing, the processing efficiency is high, enabling the one-step integration of multi-performance of the high-temperature resistant nano-copper. The high-temperature resistant nano-copper described in the present disclosure can be used as an interconnection circuit in an integrated sensor system based on all-laser in-situ direct writing, and can be widely applied in fields of aerospace, automobile, electronics, etc.

Abstract: The present disclosure provides a freezing transfer method for porous carbon electrodes based on subzero temperature and applications in sensors, the method including: forming porous carbon electrodes to be transferred on a substrate, introducing a hydrogel material between the porous carbon electrodes to be transferred and a flexible/elastomeric material, expanding the hydrogel material to form a structural coupling with porous carbon, removing the substrate to realize peeling, and completing the transfer of the porous carbon electrodes. According to the present disclosure, fast and complete peeling of the porous carbon electrodes can be realized, a thinner flexible-elastomeric substrate is required, and a composite electrode formed has superior electroconductive stretchability, which helps to realize manufacturing of conformal flexible electronics such as ultrathin flexible or stretchable sensors.

Abstract: A non-aqueous electrolyte and a lithium-ion battery containing the non-aqueous electrolyte. The non-aqueous electrolyte contains a lithium salt, an organic solvent, and an additive. The additive contains 2-phenyl-benzothiazole and a derivative thereof, and can form a passive film on the surface of a positive electrode when a lithium-ion battery is overcharged, so as to prevent the voltage of the battery from further increasing during overcharging; the additive makes the temperature of the electrolyte rise slower during overcharging; and the addition of the additive not only do not affect the room temperature cycle performance of the lithium-ion battery, but also can even improve the room temperature cycle performance of the lithium-ion battery, thereby effectively avoiding the potential safety hazards caused by battery overcharging.

Abstract: A method for preparing a fully soft self-powered vibration sensor mainly uses a laser carbonization technology to prepare a two-dimensional porous carbon electrode with an origami structure, and then transfers the two-dimensional porous carbon electrode to a three-dimensional polydimethylsiloxane (PDMS) cavity through mold transfer; finally, a laser engraving technology is used to create microstructures on surfaces of the porous carbon electrode and a PDMS film. The sensor includes the PDMS film, a liquid metal droplet oscillator, a porous out-of-plane carbon electrode, and a 3D PDMS cavity assembled tightly from top to bottom.

Abstract: A long-lasting hydrogel for use against drug-resistant bacteria, and a preparation method and use thereof are provided. In the present disclosure, polyvinyl alcohol (PVA) is mainly adopted as a matrix, and phytic acid and honey including glucose and fructose are added to modify the PVA to obtain the hydrogel. During preparation of the antimicrobial hydrogel, no toxic chemical crosslinking agent or initiator is added, and the antimicrobial hydrogel is mainly obtained by crosslinking PVA, phytic acid, and monosaccharides through ester bonds, hydrogen bonds, and electrostatic adsorption. In addition, the hydrogel obtained by adding phytic acid and honey to the PVA matrix exhibits a significant long-lasting antimicrobial effect for Staphylococcus aureus (S aureus), drug-resistant S. aureus, and Pseudomonas aeruginosa (P. aeruginosa), and the antimicrobial effect can last for about 3 months.

Abstract: A method for preparing a fully soft self-powered vibration sensor mainly uses a laser carbonization technology to prepare a two-dimensional porous carbon electrode with an origami structure, and then transfers the two-dimensional porous carbon electrode to a three-dimensional polydimethylsiloxane (PDMS) cavity through mold transfer; Finally, a laser engraving technology is used to create microstructures on surfaces of the porous carbon electrode and a PDMS film. The sensor includes the PDMS film, a liquid metal droplet oscillator, a porous out-of-plane carbon electrode, and a 3D PDMS cavity assembled tightly from top to bottom.

Abstract: A method of fabricating a flexible surface plasmon resonance, SPR, film, a method of performing Surface enhanced Raman Spectroscopy, SERS, a flexible surface plasmon resonance, SPR, film, and a SERS system. The method of fabricating a flexible SPR film comprises the steps of depositing a metal film on a ductile poly (?-caprolactone), PCL-based film having a first length to form a composite PCL-based film; and stretching the composite PCL-based film such that the ductile PCL-based film undergoes an irreversible transformation to form the SPR film exhibiting a second length that is larger than the first length.