ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Jin Wang,Yudan Shen,Yuting Zhuang,Jinyi Wang,Yue Zhang
The development of abiotic protein affinity adsorbents remains challenging for the accurate acquisition and analysis of specific protein species. Inspired by bacterial cell walls, a hierarchical hybrid framework is fabricated through the oriented growth of an Fe-based metal organic framework (MOF) on V2C MXene for the efficient separation of lysozyme (Lys). After directed evolution of adsorptive materials, the MXene@MOF composite rich in hydroxyl groups (termed as MX@MOF-DH) is found exerting exceptional affinity for Lys. Benefiting from hydrogen-bonding, coordination, and electrostatic interaction-mediated multimodal and multivalent affinity, MX@MOF-DH reveals rapid adsorption rate (5 min), superb enrichment factor (83.1), and favorable binding capacity (609.7 mg g–1), which outperforms other latest adsorbents. Moreover, femtomolar sensitivity is achieved even in the presence of high-abundant interfering proteins, as confirmed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometer analysis. This work not only provides an efficient approach for selective enrichment of lysozyme but also paves an avenue to construct the protein affinity reagents for specific biological medicine and analysis applications.
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高影响因子
Advanced Science
·
2024
·Vol. 11
·期 30
·2403551
·
IF 14.3
Chenhui Xu,Zhihui Li,Tianyi Hang,Yiming Chen,Tianlong He,Xiping Li,Jiajia Zheng,Zhiyi Wu
With the onset of the 5G era, wearable flexible electronic devices have developed rapidly and gradually entered the daily life of people. However, the vast majority of research focuses on the integration of functions and performance improvement, while ignoring electromagnetic hazards caused by devices. Herein, the 3D double conductive networks are constructed through a repetitive vacuum-assisted dip-coating technique to decorate the 2D MXene and 1D silver nanowires on the melamine foam. Benefiting from the unique porous structure and multi-scale interconnected frame, the resultant composite foam exhibited high electrical conductivity, low density, superb electromagnetic interference shielding (48.32 dB), and Joule heating performance (up to 90.8 °C under 0.8 V). Furthermore, a single-electrode triboelectric nanogenerator (TENG) with powerful energy harvesting capability is assembled by combining the composite foam with an ultra-thin Ecoflex film and a polyvinylidene fluoride film. Simultaneously, the foam-based TENG can also be considered a reliable wearable sensor for monitoring activity patterns in different parts of the human body. The versatility and scalable manufacturing of high-performance composite foams will provide new design ideas for the development of next-generation flexible wearable devices.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Zhenzhen Xu,Zhigang Wang,Dingmeng Hu,Huiqin Chen,Yufei Yan,Yuan Li,Mengjing Tu,Qiaofeng Shen,Xuanyi Liu,Rui Li,Cheng Lu,Fei Xue,Congying Xie,Gen Yang
5-Hydroxymethylcytosine in genomic DNA (5hmC-DNA), a predominant epigenetic mark, plays key roles in a broad range of bioprocesses such as cancer progression. However, efficient detection of 5hmC-DNA, especially from highly complex biological specimens, remains a harsh challenge due to its low abundance as well as the serious disturbance of non-targets. Leveraging MXene as the signal booster, an electrochemical biosensing technique is presented here for ultrasensitive detection of 5hmC-DNA from complex biological samples. The developed technique integrates enzyme-catalyzed transform of the hydroxyl group of 5hmC, sequence-specific recognition of the 5hmC-DNA targets, and facile electrochemical reaction. Remarkably, nanosized Ti 3 C 2 T x MXene is introduced as a highly conductive agent, managing to greatly boost the signals. Exhibiting outstanding consistency and robustness, the technique not only achieves excellent linear responses in a broad range of 5hmC-DNA (1.0 × 10 −13 –1.0 × 10 −9 m ) with the lowest detection limit of 59 fM but also possesses excellent selectivity against 5hmC analogs of including cytosine (C)- and 5-methylcytosine (5mC). More importantly, a proof-of-concept validation demonstrates the extraordinary ability of this technique for directly detecting 5hmC-DNA from complex backgrounds including cellular genomic extracts and serum of irradiated or non-irradiated mice, suggesting its highly promising potential for diverse applications such as early cancer screening.
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ACS Nano
·
2025
·
IF 16
Zhaopeng Liu,Dianlun Wu,Shouhao Wei,Kangqian Xing,Meilin Li,Yue Jiang,Rongfeng Yuan,Guangming Chen,Zhe Hu,Yang Huang,Zhuoxin Liu
Thermal energy, constantly being produced in natural and industrial processes, constitutes a significant portion of energy lost through various inefficiencies. Employing the thermogalvanic effect, thermocells (TECs) can directly convert thermal energy into electricity, representing a promising energy-conversion technology for efficient, low-grade heat harvesting. However, the use of high-cost platinum electrodes in TECs has severely limited their widespread adoption, highlighting the need for more cost-effective alternatives that maintain comparable thermoelectrochemical performance. In this study, a nanocomposite electrode featuring Ti3C2Tx with hollow microsphere structures is rationally designed. This design addresses the restacking issue inherent in MXene nanosheets, increases the electrochemically active surface area, and modifies the original MXene surfaces with oxygen terminations, leading to improved redox kinetics at the electrode–electrolyte interface, particularly in n-type TECs employing Fe2+/3+ redox ions. The optimized n-type TEC achieved an output power of 84.55 μW cm–2 and a normalized power density of 0.53 mW m–2 K–2 under a ΔT of 40 K, outperforming noble platinum-based TECs by a factor of 5.5. An integrated device consisting of 32 TEC units with a p–n connection is also fabricated, which can be successfully utilized to power various small electronics. These results demonstrate the potential of MXene-based composite electrodes to revolutionize TEC technology by offering a cost-effective, high-performance alternative to traditional noble metal electrodes and contributing to efficient low-grade heat harvesting.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Ye Sun,Wanying Yang,Yunfei Wang,Fan Yang,Xiunan Li,Yanhua Yang,Dong Jiang
Nanofiltration is seen as a potential technique for desalination and purification of drinking water. Improving water permeability without compromising on the high rejection rate in nanofiltration membranes is a major challenge. This article describes interfacial polymerization (IP) mediated by tannic acid (TA)–MXene interlayer to prepare an ultrathin film composite membrane (TFCi) possessing negative surface charge and optimized water transport channel. Nanofiltration process and the formation of the polyamide surface layer are both dependent on the TA–MXene intermediate layer. It is capable of storing amine monomer, decelerating interfacial polymerization, and producing a 30-nm-thick polyamide selective layer devoid of defects. With a rejection rate of 96.0% for divalent ions and a permeation flux of 22.3 L m–2 h–1 bar–1, the nanofiltration membrane that was acquired exhibits exceptional performance and stability in the operation of long-term nanofiltration. In contrast to traditional TFC membranes, the TFCi membrane successfully overcomes the long-standing contradiction between permeability and selectivity. This study offers a straightforward method for fabricating TFC membranes that exhibit outstanding performance.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yangkai Xiong,Zhiqiang Fang,Jipeng Li,Zheng Li,Guoqing Wang
Biological fouling seriously jeopardizes the development of the marine industry. Although hydrogels, as a kind of state-of-the-art antifouling material, have received wide attention, their mechanical strength is still relatively weak, and the synergistic antifouling method is comparatively single, thus limiting the performance of hydrogels. Here, a zwitterionic sulfobetaine methacrylate (SBMA)-acrylamide (AM)/sodium alginate (SA) double-network (DN) antifouling hydrogel with superb antifouling ability and outstanding mechanical properties was prepared by grafting MXene/Ag (M/Ag) and the powerful biocide polyhexamethylene biguanide (PHMB). The prepared M/Ag has a great bactericidal effect (99.9%), and the DN-M/Ag-PHMB hydrogel demonstrates high tensile strength (5.8 MPa), remarkable antiprotein adhesion, bactericidal, and antialgal adhesion. This work proves that the DN-M/Ag-PHMB hydrogel has an exceptional antifouling ability in all three stages of biofouling formation and has a promising future as a new type of green marine antifouling material.
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IEEE SENSORS JOURNAL
·
2024
·Vol. 24
·期 5
·5915-5927
·
IF 4.3
Wenqing Xu,Jun Sun,Lifan Nie,Limei Yang,Xinpeng Di,Long Zhang,Quan Zhou,Gebo Pan
Flexible capacitive pressure sensors (CPSs) have attracted valuable research attention, but there has been a critical challenge for them to simultaneously achieve high sensitivity, wide measurement range, and low cost. Herein, we propose an effective strategy to optimize the sensing performance of the CPSs by fabricating a porous dielectric nanocomposite with high permittivity and low compression modulus. It is innovative for a CPS to construct a dielectric by incorporating the highly conductive surface-silanized MXene (S-MXene) into the highly compressible thermoplastic polyurethane (TPU) porous frame to enhance its permittivity. We used a covalent surface modification method to modify MXene to improve its dispersion and interface adhesion with the matrix TPU. To construct the microporous skeleton, a facile and cost-effective coagulation method was carried out to create abundant porosity in the nanocomposite by non-solvent-induced phase separation. The CPS, assembled by sandwiching the porous dielectric nanocomposite in between two flexible electrodes, exhibits outstanding overall performance of a high sensitivity of 0.24 kPa−1 with a good linearity of 0.98 (<100 kPa), a wide detection range up to 500 kPa, a fast response time of 62 ms, and good functioning durability over 5000 cycles (~50 kPa). The prepared CPS demonstrates an extraordinary capability of real-time human motion monitoring, providing extensive insights into the application of wearable electronic devices, human–machine interfaces, and human healthcare treatment.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Qianzhi Chen,Yuxuan Liu,Anli Yi,Zhongyan Man,Rui Jiao,Hanxue Sun,Jiyan Li,An Li
The interfacial solar steam generation for seawater desalination has attracted attention because of its excellent photothermal performance and efficiency. However, the process of preparing evaporators is often complex and costly, which limits their further practicality. Here, we report an integrated solar evaporator that is easy to prepare and has good salt resistance. The porous structure of poly(methyl methacrylate) and polycarbonate (PMMA–PC) films prepared by the breathing figure (BF) method was used as the upper layer, while MXene was deposited on the as-resulted PMMA–PC film and served as a light absorption layer. Meanwhile, the hydrophilicity of the lower layer of expanded polyethylene (EPE) foam can promote the upward transfer of water and inhibit heat loss. Under one solar irradiation, the water evaporation rate of the composite film was found to be 1.79 kg m–2 h–1 in distilled water and 1.67 kg m–2 h–1 in a 15 wt % NaCl solution, exhibiting excellent evaporation performance and salt resistance. In addition, the PMMA–PC/MXene films exhibit excellent mechanical properties. Based on these merits of the PMMA–PC/MXene solar generator, it may find useful applications in practical solar interfacial evaporation. Moreover, the findings of this investigation may provide a new opportunity for the rational design of large-aperture photothermal conversion materials via a simple breathing figure method.
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IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Jihua Lu,Litong Yin,Pengyu Liu,Lihui Feng,Hongxing Yin
Ammonia (NH3) has a significant impact on human health, merely 300 ppm of which could pose a risk of irreversible harm to human life. Size and sensitivity are two primary factors for real-time sensing of NH3. Through dry grinding, we develop a novel 61-MHz quartz crystal microbalance (QCM) sensor with dimensions of only 5.0 mm in length and 3.2 mm in width. In this study, the MXene/ZnO heterojunction solution is created using the liquid phase method, and it is uniformly sprayed onto the surface of the QCM. The large specific surface area of the MXene/ZnO heterojunction provides additional adsorption sites for NH3 detection, enhancing sensitivity across a wide dynamic range and offering superior selectivity toward ammonia. At a temperature of 25° C, the sensitivity of the MXene/ZnO sensor for detecting NH3 is 1.319 Hz/ppm, surpassing that of the ZnO sensor (0.166 Hz/ppm). Furthermore, the sensor’s recovery time is significantly reduced from typically 300 s under normal conditions to 40 s after exposure to ultraviolet (UV) light. The proposed QCM sensor boasts advantages of compact size, high sensitivity, short recovery time, and exceptional selectivity for ammonia, which presents a novel solution for detecting harmful gases such as NH3 at room temperature.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Fengsen Xie,Yajie Wang,Shixun Zhang,Yamin Pan,Chuntai Liu,Changyu Shen,Xianhu Liu
Composite films composed of biodegradable materials possessing flexibility, thermal regulation capabilities, and electromagnetic interference shielding attributes represent optimal selections for wearable items and the packaging of devices. Here, we employ a simple alternating immersion and spray-coating process to fabricate flexible multifunctional films by combining hydrophobic PLA electrospun film with PPy and MXene , and investigate the thermal management and electromagnetic interference shielding properties of the films. Through alternating immersion, PPy can be rapidly in-situ polymerized on the PLA film, enhancing the surface roughness of the fibers, enabling firm integration of MXene with the film. Benefiting from the broad wavelength absorption characteristics of PPy, the solar absorption capacity of the film is significantly enhanced (97.16 %), endowing it with excellent photothermal conversion capability. Meanwhile, the high conductivity of MXene imparts the composite film with controllable and stable active heating ability, meeting heating demands under complex weather conditions. Finally, inspired by origami techniques the electromagnetic interference shielding performance of films with different folding frequencies was compared. It was found that attributed to the increased reflection paths, the film exhibited a significant improvement in electromagnetic interference shielding performance (32.58 dB to 51.96 dB) after folding. In brief, this biodegradable multifunctional composite film is an attractive candidate for future wearable products or devices packaging.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shuxian Sun,Ruoxin Yuan,Shangwen Ling,Tiantian Zhou,Ziqin Wu,Mengyuan Fu,Hanna He,Xiaolong Li,Chuhong Zhang
Conductive hydrogels have garnered significant interest in the realm of wearable flexible sensors due to their close resemblance to human tissue, wearability, and precise signal acquisition capabilities. However, the concurrent attainment of an epidermal hydrogel sensor incorporating reliable self-healing capabilities, biodegradability, robust adhesiveness, and the ability to precisely capture subtle electrophysiological signals poses a daunting and intricate challenge. Herein, an innovative MXene-based composite hydrogel (PBM hydrogel) with exceptional self-healing, self-adhesive, and versatile functionality is engineered through the integration of conductive MXene nanosheets into a well-structured poly(vinyl alcohol) (PVA) and bacterial cellulose (BC) hydrogel three-dimensional (3D) network, utilizing multiple dynamic cross-linking synergistic repeated freeze–thaw strategy. The hydrogel harnesses the presence of dynamically reversible borax ester bonds and multiple hydrogen bonds between its constituents, endowing it with rapid self-healing efficiency (97.8%) and formidable self-adhesive capability. The assembled PBM hydrogel epidermal sensor possesses a rapid response time (10 ms) and exhibits versatility in detecting diverse external stimuli and human movements such as vocalization, handwriting, joint motion, Morse code signals, and even monitoring infusion status. Additionally, the PBM hydrogel sensor offers the added advantage of swift degradation in phosphate-buffered saline solution (within a span of 56 days) and H2O2 solution (in just 53 min), maintaining an eco-friendly profile devoid of any environmental pollution. This work lays the groundwork for possible uses in electronic skins, interactions between humans and machines, and the monitoring of individualized healthcare.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Peilong Ji,Li Liu,Qiang Liu,Bingke Li,Shanhao He,Keliang Wu,Xuejun Dong,Zhiyong Liu,Yanlong Tai
Ti 3 C 2 T x MXene is highly compelling as an energy storage material, but 2D MXene sheets experience significant stacking due to hydrogen bonding and van der Waals forces. This blocks active sites and impedes fast electrolyte ion transport. The pseudocapacitance of MXene materials is highly reliant on their terminal groups. Therefore, an effective strategy was designed herein to prepare an oxygen-rich 3D hierarchical porous MXene (P-OR-Ti 3 C 2 T x ). First, Zn powder was used as a template to construct three-dimensional hierarchical porous structures that spanned the microporous, mesoporous, and macroporous scales. Second, Zn powder was used as a metal reducing agent in a reaction at 500 °C to eliminate most −F terminal groups on the MXene. Then, a subsequent acid washing step was used to introduce numerous −O terminal groups. The energy storage process of the prepared MXene was investigated by in situ Raman. More redox active sites (−O terminal groups) are exposed by the constructed oxygen-rich 3D hierarchical porous MXene structure, which also provides a shorter pathway for electrolyte ion transport. P-OR-Ti 3 C 2 T x displays superb rate performance (88.19 % retention at 100 A g −1 ) and ultra-high capacitance (676.7F/g at 2 mV/s and 698.7 F g −1 at 1 A g −1 ) when used as a supercapacitor electrode. Moreover, a symmetric flexible supercapacitor device prepared using P-OR-Ti 3 C 2 T x and carbon cloth achieves a superb energy density of 32.8 Wh kg −1 at a power density of 236.5 W kg −1 . This study offers insight into the design of MXenes that exhibit both high capacity and excellent rate performance.
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危险品化学品经营许可证（带存储）