Micromachines
·
2023
·Vol. 14
·期 7
·1327
·
IF 3.4
Kun Yang,Chenhui Bai,Boyuan Liu,Zhoutong Liu,Xiaojing Cui
Thermogalvanic hydrogel, an environmentally friendly power source, enable the conversion of low-grade thermal energy to electrical energy and powers microelectronic devices in a variety of scenarios without the need for additional batteries. Its toxicity, mechanical fragility and low output performance are a hindrance to its wide application. Here, we demonstrate thermoelectric gels with safe non-toxic, recyclable, highly transparent and flexible stretchable properties by introducing gelatin as a polymer network and SO3/42−as a redox electric pair. When the temperature difference is 10 K, the gel-based thermogalvanic cell achieves an open-circuit voltage of about 16.2 mV with a maximum short-circuit current of 39μA. Furthermore, we extended the application of the Gel-SO3/42−gel to monitor the temperature of hot or cold food, enabling self-powered sensing for food temperature detection. This research provides a novel concept for harvesting low-grade thermal energy and achieving safe and harmless self-driven temperature monitoring.Keywords:hydrogel;thermogalvanic;gelatin;self-powered
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2024
·
IF 16.8
Zhongrong Chen,Yulin Lai,Siyu Xu,Mengfei Zhu,Yue Sun,Yue Cheng,Gang Zhao
Hypertensive emergency is a clinical syndrome characterized by abrupt and substantial elevation of blood pressure in hypertensive patients due to specific triggers, leading to potentially life-threatening consequences. Intravenous injection of sodium nitroprusside is commonly used to rapidly lower blood pressure. However, its specialized nature limits its applicability for first aid or self-help in emergency situations. To address this issue, we have developed a self-powered and controllable microneedle drug delivery system that is easy to use and effective for lowering blood pressure. The system mainly consists of two parts: a piezoelectric thin film self-powered module made of polyvinylidene fluoride and carbon nanotubes, and a drug delivery module composed of polylactic acid-Au microneedles and polylactic acid-Au-polypyrrole microneedles. The results show that different pressures applied to the self-powered module generate different voltages, thereby controlling the drug release efficiency of the microneedles. Compared with conventional active devices, it exhibits a higher drug release rate and effectiveness. Furthermore, the system was successfully utilized to reduce and control blood pressure in spontaneously hypertensive rats. Compared with the injection of sodium nitroprusside, this system can more effectively lower and control blood pressure levels, and its biological safety has been verified. This study presents a controllable and user-friendly rapid blood pressure lowering system suitable for hypertensive emergencies, which has important clinical application prospects.
研究领域:
医学工程
·
药理学
·
生物医学材料
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jing Yang,Yi Yang,Shijie Zeng,Yueyue Jiang,Chunwen Guo,Yasheng Li,Jiabin Li,Xu Xiang
Self-powered hydrogels have gained attention for addressing energy needs of small flexible devices, but creating ones with high voltage and current remains challenging. Here, we report a novel polyacrylamide hydrogel loaded with copper sulfate and ammonium chloride (PAC), which not only exhibits good mechanical properties (maximum strain of 390 %), high conductivity (conductivity of 2.37 S/m), but also possesses excellent antibacterial and antifreeze properties. PAC demonstrates remarkable stimulus responsiveness. When using resistance variation as the output signal, its GF value reaches as high as 5.3 within the strain range of 35 % to 280 %. Additionally, PAC can utilize current variation as an output signal, providing options for various sensor applications. On the other hand, PAC hydrogels can achieve self-powering capabilities through zinc electrodes, with an open-circuit voltage of 0.92 V. By connecting PAC hydrogels in parallel or series, higher output voltage and current can be achieved, providing a strong guarantee for powering small devices. In a stacked series configuration, 8 sets of PACs can generate an output voltage of 7.16 V and an output current of 52.6 mA. In sum, PAC is a high-performance self-powered hydrogel with tremendous potential in the fields of flexible sensing and energy supply.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Qingjie Liu,Laiyi Liu,Duan Fan,Shuang Xie,Chongyu Wang,Xue Gou,Xiaohong Li
Antibacterial properties are crucial for wound dressings to prevent bacterial infections that impede the healing process. However, achieving portability, permeability and biodegradability simultaneously in wound dressings is a challenging and essential task. Herein, we fabricated self-powered piezoelectric and biodegradable wound dressings with antibacterial properties using fibrous composites of poly(L-lactic acid) (PLLA), poly(ethylene glycol) (PEG) and tetragonal barium titanate (BT). During the initial treatment stage, the piezoelectricity of the composites effectively generated voltages to eliminate bacteria. As the composite degraded, the piezoelectricity dynamically and gradually diminished, resulting in relatively lower electrical signals to promote wound healing. The in-situ skin elongation of a rat in relaxed and active states was first evaluated through measuring the mechanical deformation of conductive nanofibers, illustrating that approximately 6 %−18 % strain was generated on a rat skin in daily life. Furthermore, the piezoelectric output of the fibrous composites was characterized by using a homemade dynamic stretching apparatus under the predetermined strain and frequency that mimicked the stretching deformation of the rat skin. To balance the biodegradability and antibacterial effects, PLLA composite fibers were optimized by incorporating 10 % PEG and 4 % BT, which effectively generated piezoelectric voltages from 2.2 to 4.2 V under the skin deformations from 6 % to 18 %. The fibrous composites produced reactive oxygen species to kill 99 % of bacteria in 60 min and maintained great biocompatibility even at the strain of 18 %. In vivo experiments demonstrated that the fibrous dressing led to a healing rate of 91 % on day 7 and a fully wound healing with an intact epidermis after 14 days. The study provides an innovative approach to develop self-powered piezoelectric and biodegradable fibrous composites for antibacterial wound healing applications.
研究领域:
生物医学工程
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材料科学
·
医学
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产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 5
·2729-2735
·
IF 4.036
Jie Zhang,Jiaojiao Liu
In this study, CsPbBr3 particles were prepared by a simple solvent evaporation method in ambient environment; the p–n heterojunction formed by CsPbBr3 particles on the surface of a single long Te wire was used to construct a high-performance Te/CsPbBr3 photodetector. Compared with CsPbBr3 PDs, the Te/CsPbBr3 photodetector showed improved photocurrent, and exhibited characteristics of excellent self-powered performance, broad-spectrum response (UV-visible), and ultra-fast response speed (trise = 0.09 ms). In addition, under zero bias and upon 540 nm light irradiation, the device had good responsivity (0.35 mA W−1), high photosensitivity (up to 100 on/off ratio), and a detectivity of 1.42 × 1010 Jones. This study provides insight into the possibility of manufacturing high-performance self-powered photodetectors through a simple in situ construction of heterojunctions.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
PubMed
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 39
·14585-14593
·
IF 8.307
Zhiyong He,Yuexu Xiong,Wenlin Feng
Rhenium (Re)-based transition metal dichalcogenides (TMDs) have excellent in-plane anisotropic optical and electrical properties. However, their distorted octahedral (1T′) structure and weak interlayer coupling easily lead to anisotropic and out-of-plane growth, which makes it particularly difficult to prepare large-area Re-based TMD continuous porous films on SiO2/Si substrates. In this work, ReS2 films are synthesized on SiO2/Si substrates by using tellurium (Te) powder-assisted chemical vapor deposition, and then the films are selenized to synthesize a series of continuous large-area ReS2(1−x)Se2x (x = 0, 0.34, 0.56, 0.84, and 0.91) nanosheet-formed porous films. Furthermore, prototype ReS2(1−x)Se2x photodetectors with different Se compositions are fabricated. The surface morphology, high quality crystallization and compositions are confirmed by various characterization techniques. The ReS2(1−x)Se2x photodetectors based on these films show excellent ultraviolet-visible (UV-vis) spectral responses and self-powered characteristics. The response time is faster, and the photocurrent increases with the Se composition. Due to the Schottky barrier generated by the Ag–ReS2(1−x)Se2x interface, the device without bias voltage has a superior responsivity (121.9 mA W−1), high detectivity (5.27 × 1012 Jones), good on/off ratio (1.2 × 103) and fast response time (rising/decay times, 30/60 ms) under 365 nm light irradiation. This simple and controllable method opens up a new way to produce high-quality vertically oriented ReS2(1−x)Se2x porous arrays on SiO2/Si substrates for next-generation application in UV-vis photodetectors.
研究领域:
材料科学
·
光电检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Device
·
2024
·
IF 0
Huping Yan,Ronghui Qi,Zhen Liu,Han Wang,Chuanshuai Dong,Li-zhi Zhang
Ambient moisture-enabled generators (MEGs) present significant potential but suffer from low efficiency. This study explored the synergistic enhancement of an electrical double layer (EDL) at the hydrogel-electrode interface in hydrogel-based MEGs, which improves directional ion movement to achieve excellent performance. Our MEGs feature asymmetric electrodes made of carbon nanotubes and a poly(acrylamide-co-acrylic acid) hydrogel as the conductive medium. The interaction between the COOH-rich hygroscopic hydrogel and the salt-doped upper electrode established a humidity gradient within the hydrogel and a strong interfacial EDL. Results indicate that the generator (1 × 1 cm 2 ) achieved an open-circuit voltage of 1.3 V, an instantaneous short-circuit current of 55.7 μA/cm 2 , and a usable power output of 2.34 μW/cm 2 . It also exhibited robust environmental adaptability, maintaining 0.8 V below 30% relative humidity (RH) and over 0.65 V between −10°C and 60°C. Unlocking the potential of EDLs significantly enhances MEG performance, broadening application prospects in distributed self-powered devices and large-scale moisture-to-energy generation.
研究领域:
材料科学
·
能源技术
·
环境工程
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ye Zhang,Yiguo Xu,Jia Guo,Xiuwen Zhang,Xinling Liu,Yushuang Fu,Feng Zhang,Chunyang Ma,Zhe Shi,Rui Cao,Han Zhang
Mixed-dimensional van der Waals heterojunctions have attracted a great deal of attention due to their excellent photoelectric conversion capability, which have been widely applied for self-powered photoelectrochemical (PEC)-type devices as the growing demands of clean energy, environmental governance and protection, and the underwater communications. In this work, 0D Bismuth quantum dots (Bi QDs) encapsulated 2D g-C 3 N 4 nanosheets (g-C 3 N 4 @Bi) mixed-dimensional heterojunctions were prepared and spined on ITO-coated polyethylene terephthalate (PET) substrate for working as self-powered PEC-type photodetector (PD). Density functional theory calculations evidenced the successful construction of a type II van der Waals heterojunction between g-C 3 N 4 and Bi as well as its enhanced optoelectronic characteristics. Benefiting from the superior properties of g-C 3 N 4 @Bi, the as-prepared PD exhibits a high photocurrent of 5.02 μA cm −2 , a responsivity of 2843.14 μA W −1 , and a specific detectivity of 2.25 × 10 11 Jones at 0 V. Furthermore, the PD exhibits self-powered capability after 1000 cycles of bending, and the stable and repeatable ON/OFF signals can be detected over 90 days, indicating the excellent long-term stability and the potential of g-C 3 N 4 @Bi-based PD in practical applications.
研究领域:
材料科学
·
光电子学
·
能源与环境科学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Kun Xu,Rui Xu,Xuejing Liu,Qin Wei
A handily self-powered photoelectrochemical (PEC) sensor is established for acetamiprid (ACE) analysis supported by Cu 3 Mo 2 O 9 /Ag 2 S photoanode and Cs 3 Bi 2 Br 9 /BiOBr photocathode. The band gap structure of Cu 3 Mo 2 O 9 and Ag 2 S is matched which enhanced the electron transfer rate. Photocathode composite is synthesized at the interface of water and oil, and the resulting composite has good stability to water and light. Electrons flowing from the photoanode through the external circuit to the photocathode can combine with photogenerated holes of Cs 3 Bi 2 Br 9 /BiOBr, causing the photoelectrons pass into the solution and react with oxygen, and producing a large photocathode current. With the increase of ACE concentration, the detected photocurrent gradually decreased due to the steric hindrance, and a linear relationship between photocurrent and ACE concentration in the range of 0.001–500 nM. This excellent PEC sensor also performed the great detection stability, selectivity and reproducibility, which can also be applied in practical application for pesticides analysis.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Huajing Fang,Liangliang Wu,Hailong Ma,Wenting Wu,Lingqi Wu,Yue Zhang,Hong Wang
Biomimetic devices as a game changer offer unprecedented possibilities in modern optical system, artificial intelligence and other frontier fields. So far, the integrated devices with both quantitative environmental perception and self-regulation abilities are still the challenges for improving the intelligent level of optoelectronic technology. Herein, we present a dual-function biomimetic eye based on the photoelectrochemical device for the first time. The rational design of the interfaces and organohydrogel electrolyte has revolutionized the functional integration of optoelectronic device. Anions and cations in the organohydrogel electrolyte are involved in photoelectric conversion and electrodeposition process respectively in different working modes. Hence, the obtained biomimetic eye can not only detect the light intensity in self-powered mode but also adjust its own light transmission according to the illumination conditions, adapting to the environment just like human eyes. Moreover, the organohydrogel electrolyte shows excellent thermal stability (−40 °C ∼ 60 °C) and a relatively wide operating voltage range, which enables the biomimetic eye to operate in harsh environments. This work possesses potential application prospects in bionic devices and provides a new route for developing multifunctional and durable photoelectrochemical devices.
研究领域:
材料科学
·
仿生学
·
光电子技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Chenxi Shi,Huan Wang,Xiaojing Wang,Kefeng Li,Pengbi Liu,Lihuan Wang,Hui Yu
Electrical stimulation (ES) dressings have garnered considerable attention owing to their profound impact on chronic wound care, while the existing ES dressings necessitate external power supply or intricate structures, posing potential safety risks and usage inconveniences. Herein, a safe, stable, simple, serviceable, and self-powered (5S) ES dressing composed of an electrospinning asymmetric nanofiber membrane with screen-printed electrodes and a polyurethane foam is developed. The asymmetric nanofiber membrane acts as the power due to its electrical double-layer effect during the unidirectional exudate transfer, and the polyurethane foam with excellent water absorption and retention properties effectively manages the exudate. This 5S dressing generates a sustained low-voltage direct current ES in situ at the wound site and creates a favorable microenvironment for wound re-epithelization. In vitro and in vivo studies indicate that this 5S dressing can significantly promote wound healing. Compared with the control group (on the 7th day), the collagen deposition of the 5S dressing treated group increased by 15.9%, the capillary density increased by 90.6%, and the epidermal thickness increased by 228.3%, resulting in a 23.6% enhancement in the wound healing rate. Consequently, the 5S wound dressing presents a highly sophisticated and effective therapeutic approach for accelerating wound healing.
研究领域:
生物医学工程
·
组织修复与再生
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-23
·
IF 12.6
Li Bing,Ma Yichao,Fatima Kanwal,Zhou Xiaojun,Gu Xin,Chen Shuo,He Chuanglong
Electrical stimulation has been shown to regulate early immunity and late-stage osteogenesis in bone repair. However, achieving in-situ electrical stimulation in the form of self-power in vivo during the initial postoperative stages when the patients have limited mobility remains challenging. In this study, we developed a 3D-printed in-situ self-powered composite scaffold composed of shape memory polyurethane elastomers (SMPU) and polyvinylidene fluoride (PVDF) piezoelectric nanofibers. The composite scaffold demonstrates excellent shape memory performance, allowing for minimally invasive implantation. During the shape memory process, the composite scaffold can provide mechanical force stimulation to PVDF nanofibers to generate charge. Therefore, self-power was achieved through the integration of the shape memory process and piezoelectric effects, and it can be used for in-situ electrical stimulation during the initial postoperative period. Additionally, the composite scaffold can output voltage under continuous mechanical force stimulation, indicating that the patients can apply sustained mechanical force stimulation to the composite scaffold to output voltage through rehabilitation exercises when the patients regain mobility. Both cell experiments and animal studies confirmed that this composite scaffold can effectively regulate the immune microenvironment and enhance osteogenesis. This study successfully achieves in-situ electrical stimulation in the form of self-power by integrating the shape memory process and piezoelectric effects, which is expected to be an effective repair strategy for bone tissue engineering. Graphical
研究领域:
生物医学工程
·
材料科学
·
骨组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）