ACS Applied Materials & Interfaces
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2024
·
IF 8.3
Zhen Wan,Cheng Li,Ronghui Liu,Wei Zhou,Wenjing Fan,Chuanxue Huang,Yang Liu
Two-dimensional (2D) Ti3C2Tx MXene materials show great potential in electrochemical and flexible sensors due to their high electrical conductivity, good chemical stability, and special delaminated structure. However, their thermal properties were rarely studied, which remarkably affect the stability and safety of various devices. Here, we fabricated a suspended MXene drum resonator photothermally driven by a sinusoidally modulated laser, measured the thermal time constant by demodulating the thermomechanical motion, and then calculated the thermal conductivity and thermal diffusivity of the MXene film. Experiments show the thermal conductivity of the film increases from 3.10 to 3.58 W/m·K while the thermal diffusivity from 1.06 × 10–6 to 1.22 × 10–6 m2/s when temperature increases from 300 to 360 K. We also confirm the film thermal conductivity is mainly contributed by phonon transport rather than electron transport. Furthermore, the relationship between the mechanical and thermal properties of the MXene films was disclosed. The thermal conductivity decreases when film strain increases, caused by enhanced phonon scattering and softening of high-frequency phonons. The measurements provide a noninvasive method to analyze the thermal characteristics of suspended MXene films, which can be further extended to the thermal properties of other 2D materials.
研究领域:
材料科学
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热物理学
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产品关联
DOI
PubMed
高影响因子
ChemNanoMat
·
2019
·Vol. 6
·期 1
·64-67
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IF 3.431
Renji Bian,Shanglin Xiang,Dongyu Cai
Graphical Protective coat : A facile route is developed to create a hydrophobic coating for large MXene films based a reaction between a mono-isocyanate and MXene at room temperature. MXenes are a class of two-dimensional transition metal carbides and nitrides with hydrophilic surface. This Communication, for the first time, reports a room temperature-initiated reaction between octadecyl isocyanate and MXene. This provides a facile and scalable route for introducing long alkane chains to the surface of MXene films. The hydrophobic coatings demonstrate strong ability for protecting MXene against degradation in the presence of moisture.
研究领域:
材料科学
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表面化学
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产品关联
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-8
·
IF 17.694
Wan Sijie,Li Xiang,Chen Ying,Liu Nana,Wang Shijun,Du Yi,Xu Zhiping,Deng Xuliang,Dou Shixue,Jiang Lei,Cheng Qunfeng
Titanium carbide MXene combines high mechanical and electrical properties and low infrared emissivity, making it of interest for flexible electromagnetic interference (EMI) shielding and thermal camouflage film materials. Conventional wisdom holds that large MXene is the preferable building block to assemble high-performance films. However, the voids in the films comprising large MXene degrade their properties. Although traditional crosslinking strategies can diminish the voids, the electron transport between MXene flakes is usually disrupted by the insulating polymer bonding agents, reducing the electrical conductivity. Here we demonstrate a sequential densification strategy to synergistically remove the voids between MXene flakes while strengthening the interlayer electron transport. Small MXene flakes were first intercalated to fill the voids between multilayer large flakes, followed by interfacial bridging of calcium ions and borate ions to eliminate the remaining voids, including those between monolayer flakes. The obtained MXene films are compact and exhibit high tensile strength (739 MPa), Young’s modulus (72.4 GPa), electrical conductivity (10,336 S cm −1 ), and EMI shielding capacity (71,801 dB cm 2 g −1 ), as well as excellent oxidation resistance and thermal camouflage performance. The presented strategy provides an avenue for the high-performance assembly of other two-dimensional flakes.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 8
·期 5
·1673-1678
·
IF 6.641
Zhangshuo Liu,Yu Zhang,Hao-Bin Zhang,Yang Dai,Ji Liu,Xiaofeng Li,Zhong-Zhen Yu
High-performance and flexible electrically conductive materials with satisfactory mechanical strength are vital in shielding electromagnetic interference (EMI) and radiation for portable electronics and wearable devices. Two-dimensional transition metal carbides/nitrides (MXenes) with remarkable metallic conductivity are considered as ideal candidates for ultrathin EMI shielding films, but their poor mechanical performances often impede their practical applications. Herein, we fabricate highly conductive MXene-based films with remarkable EMI shielding performance and excellent mechanical strength by enhancing the interfacial adhesion among the adjacent MXene nanosheets with multivalent aluminum ions. The tensile strength of the MXene film is significantly enhanced by 190% from 28.7 to 83.2 MPa with the introduction of aluminum ions and its conductivity is retained at 265 600 S m−1, exhibiting superior comprehensive performances to the previously reported results with other reinforcements. The strong and highly conductive MXene film with a small thickness of 39 μm exhibits one of the highest EMI shielding performances of over 80 dB in the X-band. This work provides a simple and efficient strategy for designing and fabricating high-performance MXene-based materials for efficient EMI shielding applications.
研究领域:
材料科学
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电子工程
✓ 已验证
DOI
高影响因子
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.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Yu Fang,Xiaolong Li,Mengjie Sheng,Shang Gong,Hao Wu,Xiang Lu,Jinping Qu
Deficiencies in the adaptability and versatility of a phase change composite severely restrict its promotion and application in fields with complex operational environments. Herein, a series of nickel foam adsorbed paraffin wax (Ni-F/PW) composites were obtained via a vacuum impregnation process. Multi-walled MXene films were also obtained using a vacuum filtration process. Sandwich structured phase change composites (SSPCCs) were obtained through a facile solution encapsulation process, using polydimethylsiloxane. Among them, SSPCC-25 demonstrates a total shielding effectiveness value of 88.2 dB with a thickness of 25 μm. Additionally, high latent heat (170 J/g) and great thermal stability provide SSPCCs with excellent thermal management application potential. The proven excellent photo-to-thermal and magnetic-to-thermal conversion abilities further widen the range of applications for SSPCCs. In short, the fabricated SSPCCs are an excellent candidate as a functional material in the fields of electromagnetic interference shielding and temperature management.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Liwen Tan,Chuanliang Wei,Yuchan Zhang,Yongling An,Shenglin Xiong,Jinkui Feng
As a promising candidate of safety, low-cost and eco-friendliness, Zn metal batteries still suffer from poor stability and irreversibility, which attribute to dendrite growth and accompanied side reactions. To enable highly reversible Zn anode, a flexible and self-assembled biomass engineered MXene film, functioning as an artificial protective interface, is firmly adhered on the Zn foil surface by facile blade-casting. This amine-rich ultrathin protective film not only effectively protects fresh Zn against water corrosion, but also promotes Zn nucleation and triggers homogeneous Zn plating/stripping underneath the film attributing to its excellent adhesion, flexibility, hydrophilicity and strong coordination of amine groups to Zn 2+ . Meanwhile, the conductive MXene component can terminate the accidental Zn dendrites by ionizing the contacted Zn and dispersing the tip electric field. Consequently, the protected Zn electrode delivers prolonged cycling life and improved coulombic efficiency, which also conduces to improving the full cell performance when it is matched with MnO 2 cathodes. This work brings a new insight into the practical design of highly reversible Zn metal anodes.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Guoyu Yang,Shuo Cheng,Xuming Yao,Yuan Tian,Qi Zhao,Junzhen Chen,Yujun Li,Jianjun Jiang
Inspired by the vertical structure of forests, a Ti 3 C 2 T x MXene–short carbon fiber/carbonyl iron/polyurethane composite with a typical “forest-ground” heterogeneous structure was developed. These biomimetic composites comprised a hybrid foam with parallel bramble-like porous microstructures and an MXene film with a layered microstructure. The asymmetric electrical conductivity, provided by the “forest-ground” heterostructure, imparts distinct composite Janus-faced electromagnetic interference (EMI) shielding properties. In the X-band, the composite demonstrated an average total EMI shielding effectiveness (SE T ) of 55.1 dB, which highlights its superior EMI shielding performance. When the electromagnetic (EM) waves were incident from the hybrid foam, the shielding mechanism was absorption-dominated, with a reflection-shielding effectiveness (SE R ) of 2.6 dB and a reflection coefficient of 0.45, which corresponds to just 45 % of the incident waves being reflected. This performance is attributed to the synergistic “loss-reflection-loss” effect, multiple scattering, and diverse EM dissipation mechanisms within the hybrid foam. In contrast, when the EM waves were incident from the MXene film, the composite exhibited a reflection-dominated EMI shielding performance, with an SE R of 10.6 dB and a reflection coefficient of 0.9, reflecting 90 % of the incident waves. Furthermore, the composite exhibited outstanding mechanical properties with a compressive strength of 2.04 MPa and an elastic modulus of 4.14 MPa. It also demonstrated excellent thermal insulation performance (0.490 W m −1 K −1 ) and hydrophobicity. This study highlights an effective strategy for creating unique multifunctional Janus-faced EMI shielding materials, expanding their potential for application in complex environments, such as at high-temperatures, beyond the conventional EMI shielding materials.
研究领域:
材料科学
·
电磁学
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产品关联
DOI
高影响因子
Nanophotonics
·
2019
·Vol. 9
·期 1
·123-131
·
IF 6.908
Yan Zuo,Yerun Gao,Shiyu Qin,Zhenye Wang,De Zhou,Zhen Li,Yu Yu,Ming Shao,Xinliang Zhang
Two-dimensional (2D) materials were widely used in sensing owing to the tunable physical or chemical properties. For years, optical sensing attracted a massive amount of attention on account of high accuracy, high security, non-invasive measurement, and strong anti-interference ability. Among the various optical sensing schemes, multi-wavelength optical sensing (MWOS) is an important branch and widely adopted in optical image, spectroscopy, or bio/chemical research. However, no spectral selectivity, limited working wavelength range, or intrinsic instability makes conventional 2D materials unsuitable for MWOS. A new class of 2D materials, known as MXene, exhibits outstanding electronic, optical, and thermal properties, leading to new applications in optical sensing. In this paper, we propose an integrated photothermal optical sensor (PHOS) using Ti 3 C 2 T x MXene films. Thanks to the inherent spectral dependence of Ti 3 C 2 T x MXene over a broadband range, the proposed PHOS can respond to different wavelengths from visible to short-wavelength infrared. Because of the efficient photothermal conversion, the PHOS has a control efficiency up to 0.19 π · mW −1 · mm −1 under 980-nm laser pumping and shows a higher control efficiency under red light (690 nm) irradiation. The measured response time of the proposed PHOS is 23.4 μs. This paper brings MXene into chip-integrated optical sensing fields for the first time and shows the potential applications.
研究领域:
材料科学
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光学工程
·
传感器技术
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Daotong Zhang,Min Luo,Kai Yang,Pei Yang,Chaozheng Liu,Weimin Chen,Xiaoyan Zhou
Ti 3 C 2 T x (a typical MXene) films can be used as free-standing electrodes due to their ultrahigh electrical conductivity , well flexibility and high electrochemical activity. However, inevitable self-restacking issue of Ti 3 C 2 T x nanosheets largely decreases exposed area and impedes the ion transport in Ti 3 C 2 T x film. Herein, hierarchically porous carbon (HPC) introduced into Ti 3 C 2 T x film can not only act as the pillar for adjacent Ti 3 C 2 T x nanosheets to prevent their typical self-restacking and further accelerate rapid ion transport in the transverse direction, but also ensure rapid ion transport in the longitudinal direction by introducing abundant macro/mesopores. By easily changing the amount of HPC (0–60%), the porosity of the film is well controlled, with adjustable specific surface area (SSA) from 8 m 2 g −1 to 755 m 2 g −1 . The prepared quasi-solid-state supercapacitor fabricated by 60% HPC shows a good stability after different bending angles, high capacitance of 211 mF cm −2 , energy density of 4.68 μW h cm −2 at 19.91 μW cm −2 , and high capacitance retention of 86% after 10,000 charging-discharging cycles. This work will pave a facile route to alleviate the self-restacking phenomenon of Ti 3 C 2 T x film by constructing transverse and longitudinal channels for rapid ion transport.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Tangdong Feng,Wanxia Huang,Hongfu Zhu,Xueguang Lu,Sujit Das,Qiwu Shi
The modulation of the terahertz (THz) wave is fundamental for its applications in next-generation communications, biological imaging, sensing, and so forth. Searching for higher efficient modulation is still in progress, although plenty of materials have been explored for tuning THz wave. In this work, optical-transparent self-assembled MXene films are used to modulate the THz reflection at the SiO2/MXene/air interface based on the impedance matching mechanism. By adjusting the number of stacked MXene layers/concentrations of MXene dispersions, the sheet conductivity of the MXene films will be changed so that the impedance at the SiO2/MXene/air interface can be tuned and lead to a giant modulation of THz reflection. Particularly, we demonstrate that the MXene films have highly efficient THz modulation from antireflection to reflection-enhancing with a relative reflection of 27% and 406%, respectively. This work provides a new pathway for developing the MXene films with the combination of optical-transparency and high smart THz reflection characteristics, and the films can be applied for THz antireflection or reflection-enhancing.
研究领域:
材料科学
·
光子学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 35
·期 17
·2422374
·
IF 18.5
Zhaoling Huang,Chengqi Ge,Siyuan Li,Miao Cai,Yun Hui,Xinqin Liao,Qi Zeng
MXene films possess excellent controllable electrical conductivity, mechanical and chemical characteristics, showing great potential in the construction of new-generation flexible wearable devices. However, achieving multifunctional applications of MXene through simple and scalable methods is a major challenge. Inspired by skin tissue, a pyrolysis-MXene flexible film (P-MX) with randomly microspine-like and internal hollow coupled structure is prepared through the combination of interface-induced self-assembly, solution thermal deposition, and high-temperature pyrolysis methods. The multi-level structure provides more variable conductive paths during compression and ensures structural integrity under high pressure. The synergistic treatment of oxygen plasma and polyvinyl alcohol (PVA) enhances adhesion strength highest up to 46.87 times compared to a single surface treatment strategy between P-MX sensitive components and flexible substrate. Such P-MX sensor demonstrates an extremely high sensitivity (76.79 kPa −1 within 0–25.39 kPa), a wide detection range (up to 1275.19 kPa), fast response/ recovery time (22 ms/32 ms), and high cycle reliability (over 18 000 cycles). It can also perceive weak signals (12 mg/4.8 Pa). Additionally, P-MX exhibits a significant increment in specific capacitance. It exhibits excellent prospects in human-machine interaction, neural electrodes, and motion detection. These findings open new pathways for the practical application of MXene-based wearable piezoresistive devices and bioelectronics.
研究领域:
材料科学
·
生物医学工程
·
柔性电子
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）