FOOD CHEMISTRY
·
2025
·
IF 9.8
Tianxing Fang,Qingyi Wei,Erwen Wu,Hongbin Pu
Malachite green (MG), with teratogenic and reproductive toxicity, is widely misused as an antimicrobial agent, posing a serious threat to animal and human health. Therefore, this study developed a novel recyclable Surface-enhanced Raman scattering (SERS) hydrogel substrate, TiO 2 /MXene/PAA-PAM@AuNPs (TMPA), by forming a dual hydrogen-bond network using a PAA-PAM hydrogel matrix with TiO 2 /MXene and embedding AuNPs, for detecting MG residues in aquatic products. This hydrogel exhibits high sensitivity, with a detection limit for MG of 8.13 × 10 −6 mg/L. Additionally, it can completely degrade surface-adsorbed MG within 60 min under light irradiation, achieving self-cleaning and enabling reuse for more than seven cycles, and can be stored for over 50 days while maintaining its SERS activity due to the support and preservation provided by the hydrogel network. Additionally, this substrate can rapidly detect MG residues on or within fish, offering a new strategy for monitoring MG residues in aquatic products.
研究领域:
食品安全
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jie Yang,Jianli Cheng,Guicai Qi,Bin Wang
The ability of a flexible strain sensor to directly adapt the complicated human biological motion or combined gestures and remotely control the artificial intelligence robotics could benefit the wearable electronics such as intelligent robotics and patient healthcare. However, it is a challenge for the flexible strain sensor to simultaneously achieve high sensing performances and stretchability and long sustainability under various deformation stress or damage. Herein, a dual-cross-linked poly(acrylic acid–stearyl methacrylate)/MXene [P(AA–SMA)M] hydrogel with enhanced mechanical stretchability and self-healability is fabricated by importing reversible coordination and hydrophobic interaction into polymer networks. As a result, the hydrogel film not only exhibits high tensile strength (525 kPa) and stretchability (∼2600%) but also achieves repetitive healable property with 843% elongation even after the 20th broken/self-healing cycle. More importantly, the resultant strain sensor delivers a low detection limit, wide sensing range, fast response time, and repeatability of 1000 cycles even after repeated self-healing. So, the sensor can monitor subtle human motions and recognize different handwriting and gestures, which reveals potential applications toward health-care devices, flexible electronics, and human–machine interfacing.
研究领域:
材料科学
·
柔性电子
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Yang Xiaoli,Zhang Xiaomin,Zhang Han,Cong Yuhan,Wang Zitan,Ye Erkang
MXene-based hydrogels have become important materials for epidermal applications due to their excellent conductive properties and biocompatibility. Nonetheless, the application of such materials in the epidermal field is limited because of insufficient mechanical properties, unidimensional stimulus response, and complex preparation methods. In this study, an MXene-based hydrogel with outstanding self-healing, temperature sensitivity, and pH sensitivity was prepared by a one-pot method at 60°C for 5 h. The hydrogel is composed of Ti 3 C 2 T x MXene nano-slices, polyacrylamide (PAM), poly( N -isopropylacrylamide) (PNIPA), and polyacrylic acid (PAA), denoted as MXene/PAM/PNIPA/PAA hydrogel (MPANA hydrogel). The MPANA hydrogel exhibits excellent mechanical properties. Its tensile strength, elastic modulus, toughness, and elongation at break are 2.79 MPa, 0.64 MPa, and 51 MJ/m 3 , 412%, respectively, which indicates that the hydrogel possesses good stretchability. Moreover, the MPANA hydrogel demonstrates good self-healing ability, attaining an average strain self-healing efficiency of 94%, achieved in 12 h. Additionally, the MPANA hydrogel shows impressive thermal response sensitivity (−1.3560% °C −1 ) and a rapid pH response time (32–53 s). In conclusion, the MPANA hydrogel has significant potential for applications in epidermal sensors. Graphical
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
Advanced Healthcare Materials
·
2025
·
IF 9.6
Jiahao He,Jie Li,Jinliang Ren,Xiaona Cao,Ting Xu,Chaofeng Liang,Bowen Zhuang,Xudong Lin,Ningning Li,Bingzhe Xu
Implantable devices that integrate advanced nanomaterials with wireless energy systems represent a transformative approach to tackling brain tumors. Here, a millimeter-scale implantable device based on an MXene/polyvinyl alcohol (PVA) hydrogel is introduced, designed for precise and minimally invasive brain tumor therapy via tunable alternating electric fields. This device presents a novel approach by combining ultrasonic wireless energy transfer with triboelectric energy harvesting, eliminating the need for in vivo batteries and enabling continuous operation in a completely wireless manner. The system not only optimizes energy harvesting efficiency but also ensures the localized delivery of therapeutic electric fields directly to the tumor site. Its compact size and mechanical flexibility allow for precise implantation in the complex brain environment, offering a minimally invasive solution with enhanced safety and adaptability. Preclinical evaluations using U-87 MG orthotopic glioblastoma models demonstrate significant tumor growth inhibition and a marked improvement in survival rates, underscoring its therapeutic potential.
研究领域:
生物医学工程
·
肿瘤学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Yaqing Liu,Xiaoxiao Lv,Ying Song,Qi Ao,Bolei Yuan,Tingting Huang,Xinglai Tong,Jun Tang
Traditional hydrogel sensors containing MXenes as a conductive substrate will inevitably face the problem of excessive stacking of MXene nanosheets, which limits electron transport, thus reducing conductivity and sensitivity. Moreover, existing MXene hydrogels generally exhibit poor mechanical properties and fragility. In addition, it is necessary to prepare degradable electronic skins for reducing environmental pollution and recycling energy materials─MXene. How to find a balance between mechanical properties and degradation properties is a challenge. In this work, we overcome this challenge by combining a dynamic covalent strategy and establishing a self-modified interlocked structure. A biodegradable physically cross-linked hydrogel (OMDDH─ordered MXene dynamic degradable hydrogel) is constructed, and a highly interconnected three-dimensional (3D) MXene@CS-Pba network is prepared, thus endowing the sensor with excellent conductivity (24 × 10–4 S cm–1). For excellent mechanical properties, dynamic covalent interactions, hydrogen-bonding interactions between the dual networks, and chain entanglement of poly(vinyl alcohol) (PVA) totally build interlocked structures, thus endowing the hydrogel with excellent mechanical strength (1000 kPa). In an acidic environment, the dynamic covalent bond is broken, and the chain entanglement of PVA is also disentangled due to the disruption of the electrostatic equilibrium, resulting in the release of MXene for recycling (recycling conductivity: 22 × 10–4 S cm–1). Undoubtedly, we exhibit a strategy to construct ordered and degradable MXene hydrogels possessing excellent conductivity, high mechanical strength, and degradation performance, which lays the sensors’ wide applications in smart devices.
研究领域:
材料科学
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传感器技术
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 5
·1-10
·
IF 5.3
Yang Xiao,Li Chunguang,Xia Jianfei,Zhang Feifei,Wang Zonghua
A three-dimensional (3D) self-assembled AuNPs/Ti 3 C 2 MXene hydrogel (AuNPs/Ti 3 C 2 MXH) nanocomposite was prepared for the fabrication of a novel microRNA-122 electrochemical biosensor. The 3D hydrogel structure was gelated from two-dimensional MXene nanosheets with the assistance of graphite oxide and ethylenediamine. MXene hydrogels supported the in situ formation of Au nanoparticles (AuNPs) that predominantly exploring the (111) facet, and these AuNPs are utilized as carriers for hairpin DNA (hpDNA) probes, facilitating DNA hybridization. MXene acted as both a reductant and stabilizer, significantly improving the electrochemical signal. In addition, the conjugation of PAMAM dendrimer-encapsulated AuNPs and H-DNA worked as an ideal bridge to connect targets and efficient electrochemical tags, providing a high amplification efficiency for the sensing of microRNA-122. A linear relationship between the peak currents and the logarithm of the concentrations of microRNA-122 from 1.0 × 10 −2 to 1.0 × 10 2 fM (I = 1.642 + 0.312 lg c , R 2 = 0.9891), is obtained. The detection limit is 0.8 × 10 −2 fM (S/N = 3). The average recovery for human serum detection ranged from 97.32 to 101.4% (RSD < 5%). Graphical Abstract
研究领域:
生物化学
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材料科学
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Device
·
2024
·
IF 0
Yunfei Zhang,Zhishan Xu,Mingkun Li,Yue Yuan,Wei Wang,Liqun Zhang,Pengbo Wan
Flexible epidermal sensors built using conductive hydrogels can help realize personalized and wearable diagnostic healthcare devices. However, many challenges remain, such as in durability, adhesiveness, sensing ability for high-performance wearable human-machine interaction, and antibacterial and hemostatic capabilities for medical applications. In this work, we present a mussel-inspired MXene hydrogel-based epidermal sensor with high sensing sensitivity and a number of useful physical properties including high strain tolerance, self-adhesiveness, and the ability to self-heal. We integrated the hydrogel into several prototype devices for the monitoring of full-scale human motions, such as elbow bending and wrist pulse, and tiny electrophysiological signals, such as electrocardiogram and electromyogram. At the same time, the material is also biocompatible and demonstrated reliable antibacterial and hemostatic capability, which provides the add-on benefits of treating wound bleeding and infection.
研究领域:
生物医学工程
·
柔性电子器件
·
可穿戴传感器
·
材料科学
✓ 已验证
DOI
Microsystems & Nanoengineering
·
2024
·Vol. 10
·期 1
·1-17
·
IF 7.3
Yang Chengxiu,Hu Jiafei,Liu Lihui,Wu Shaowei,Pan Mengchun,Liu Yan,Wang Haomiao,Li Peisen,Zhang Qi,Qiu Weicheng,Luo Huihui
The perception of fish locomotion is important for understanding their adaptive behaviors and ethological characteristics. However, the main strategy used for extracting fish attitudes involves the use of a vision-based monitoring system, which is limited in its range of observation and cannot perform tracking for long times. Here, we report the use of a wearable tagging electronic device, referred to as an underwater vest, to capture the surrounding flow field disturbances triggered by swimming or momentary postural changes. All of these goals were achieved by integrating a pair of pseudocapacitive pressure-sensing units and a flexible circuit board. Notably, additional conditions, such as variable hydraulic pressures and minimal changes in fish posture, require high stability and sensitivity of the sensing units. Thus, hybrid hydrogel electrodes were developed through cross-linking MXene with holey-reduced graphene oxide nanosheets and further modification with 1-ethyl-3-methylimidazolium dicyanamide ionic liquids, which increased the interfacial capacitance and long-term interfacial activity of the MXene. Consequently, the sensing unit exhibited ultrahigh sensitivity ( S max ~136,207 kPa −1 ) in an aquatic environment for 60 days and superior high-pressure resolution (10 Pa) within a wide working range of 1 MPa. Ultimately, an underwater vest integrated with such sensing units clearly distinguished and recorded fish locomotion. We believe that the designed device may open avenues in flow field monitoring and ocean current detection and provide new insights into the development of sensitive underwater tagging.
研究领域:
生物工程
·
材料科学
·
海洋学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Songnan Zhang,Xi Wang,Guolong Li,Kaiying Zhao,Gengchen Liu,Zheng Li,Changsheng Qiao,Zhenxue Liu,Zhibin Zhang
Solar energy, as a clean and renewable resource, can be converted into thermal energy and utilized for freshwater production, holding the potential to address the freshwater shortage. Despite numerous studies focused on the development of high-efficiency solar evaporators, the challenge of achieving efficient and continuous water evaporation in low-light or dark environments still requires further investigation. Here, we design a solar evaporator system that combines photothermal and electrothermal water evaporation capabilities, using a conductive raised fabric as the matrix. The system features a PVA/MXene hydrogel-modified photothermal layer, PVA water transport layer, and polystyrene insulation. Results demonstrate that the PVA/MXene evaporator system exhibits outstanding photothermal and electrothermal conversion capabilities. Under 1 sun/10 V conditions, the surface temperature rapidly increases to 102.9 °C, significantly enhances the water evaporation rate. Meanwhile, the PVA/MXene@RF evaporator also demonstrate exceptional photoelectric water evaporation performance (3.37 kg·m −2 ·h −1 , 1 sun/10 V), high conversion efficiency (97.2 %), and effective self-desalting capabilities. This solar evaporator system, enables high-efficiency continuous water evaporation and collection even in dark or low-light conditions, making it a promising solution for addressing freshwater shortage.
研究领域:
能源科学
·
材料工程
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Haofei Sima,Bo Liu,Xiaolin Shi,Chunling Zhang
The rapid development of communication technologies and flexible human–computer interfaces, necessitates the fabrication of a strain sensor with high sensitivity and electromagnetic interference (EMI) shielding performance. The purpose is to monitor human movement and protection from electromagnetic damage. Herein, we prepared tough, conductive, and self-healing carbon nanotube@cellulose/MXene (CCM) acrylamide-based hydrogels to achieve the dual-functional applications of strain sensors and EMI shielding. The carbon nanotubes and cellulose self-assembled into conductive fibers. Then, the two-dimensional MXene nanosheets were interconnected through the conductive fibers while being cross-linked into a complete conductive network through the metal–ligand bonding of Zn 2+ . Owing to the excellent conductivity (9.64 S/m) of the CCM hydrogel and the non-covalent reversible interactions among the components, the composite hydrogel exhibited excellent tensile strain (~424 %), efficient self-healing ability (87.2 %), frost and water retention ( T c < −60 °C), and efficient shielding effectiveness (51.8 dB). Meanwhile, as a strain sensor, it also possessed excellent sensing performance such as high sensitivity (GF = 20.17), wide detection range (0 %–400 %), fast response time (~135 ms), and high stability (~500 cycles). These features provide an idea for the subsequent design of flexible sensing electronics with EMI shielding performance.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ying Song,Qi Ao,Tuohao Jiang,Xinglai Tong,Ran Ding,Xiaogang Li,Jun Tang
Wearable epidermal electronics fabricated from MXene-based conductive hydrogels have attracted considerable interest because of their promising prospects in real-time health monitoring and human–computer interaction sensing. However, the development of a sustainable hydrogel with exceptional mechanical toughness, high conductivity, and self-adhesion is crucial to reliably capture signals through polymer network designs that establish robust interactions between MXene nanosheets and network substrates while minimizing electronic waste generated by discarded sensors. This study presents the fabrication of a sustainable conductive MXene-based dual-network hydrogel through skillful assembly of MXene nanosheets, β-cyclodextrin with azobenzene-modified polyacrylic acid chains, and poly (vinyl alcohol) polymer networks. The hydrogel demonstrates exceptional mechanical properties (strength at breaking ∼ 625 kPa, elongation at break ∼ 630 %) attributed to the presence of numerous hydrogen bonds and host–guest interactions, along with superior electrical conductivity (23.65 S/cm) and self-adhesion. The hydrogel demonstrates exceptional sensitivity across a wide range of strains, enabling the detection of various human movements and achieving successful applications in handwriting recognition and sign language translation. Under acidic condition and UV irradiation, the disassembly of AZO and β-CD as well as the untangling of PVA chains entanglement facilitate the release and recycling of MXene. This study presents a technological platform that holds promise for developing conductive hydrogels with enhanced sensing capabilities, catering to the requirements of stretchable electronic skin and intelligent robotic systems.
研究领域:
材料科学
·
生物医学工程
·
电子皮肤技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2021
·Vol. 8
·期 18
·2101664
·
IF 16.806
Xianwu Huang,Jiahui Huang,Dong Yang,Peiyi Wu
MXenes as an emerging two-dimensional (2D) material have attracted tremendous interest in electrochemical energy-storage systems such as supercapacitors. Nevertheless, 2D MXene flakes intrinsically tend to lie flat on the substrate when self-assembling as electrodes, leading to the highly tortuous ion pathways orthogonal to the current collector and hindering ion accessibility. Herein, a facile strategy toward multi-scale structural engineering is proposed to fabricate high-performance MXene hydrogel supercapacitor electrodes. By unidirectional freezing of the MXene slurry followed by a designed thawing process in the sulfuric acid electrolyte, the hydrogel electrode is endowed with a three-dimensional (3D) open macrostructure impregnated with sufficient electrolyte and H + -intercalated microstructure, which provide abundant active sites for ion storage. Meanwhile, the ordered channels bring through-electrode ion and electron transportation pathways that facilitate electrolyte infiltration and mass exchange between electrolyte and electrode. Furthermore, this strategy can also be extended to the fabrication of a 3D-printed all-MXene micro-supercapacitor (MSC), delivering an ultrahigh areal capacitance of 2.0 F cm –2 at 1.2 mA cm –2 and retaining 1.2 F cm –2 at 60 mA cm –2 together with record-high energy density (0.1 mWh cm –2 at 0.38 mW cm –2 ).
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）